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S. Salazar, Adding Functionality to the Hydra Game

1. lt ul gt lt li gt gt lt p gt Both of these games require the HYDRA USB driver to compile which is provided above with the game source template lt p gt Graphics lt h3 gt Game graphics are implemented using object images stored on the server The objects can then be turned on or off and moved around the game screen Images are in PNG format which was chosen primarily for its lossless compression and transparency Overall this provides easy creation of graphics with an image editor coupled with the e editor coupled with the lt a href http www libpng org pub png pngintro html target _blank gt advantages lt a gt of PNG lt p gt Images must meet these requirements lt p gt lt li gt Images must be in PNG format lt 1li gt lt li gt Images must be numbered consectutively starting at 0 and in the format amp quot number png amp quot for example amp quot 3 png quot lt li gt lt li gt A max of 100 images can be used numbered 0 99 lt li gt lt li gt Higher numbered images display above lower numbered images on the game screen lt li gt gt The game screen resolution is 240 x 180 pixels Objects are positioned by their x and y coordinates which indicate the position of the object amp 39 s image center on the game screen Therefore images can be placed on the game screen with as little as half the width and half
2. Salazar get the file path String codePath Assembly GetExecutingAssembly GetName CodeBase String filePath Path GetDirectoryName codePath Substring 6 game_files game eeprom run Propellent for downloaded file Console Write Uploading game to HYDRA HydraPropForm uploadGame filePath Console WriteLine done send notification that HYDRA upload is complete connStrm WriteByte 4 close connection with developer connStrm Close devConn Close restart HYDRA serial connection and thread hydra Open hydraThread Resume shut down all player connections Console Write Disconnecting players for int i 0 i lt MAX PLAYERS i if players i active players i conn GetStream WriteByte DEV_FINISHED players i conn Close players i conn null players i active false numPlayers 0 Console WriteLine done Console WriteLine Game upload complete Console WriteLine endregion region Miscellaneous methods checks for commands from the server console void commandConsole Console WriteLine Type help for a list of commands n while true string str Console ReadLine Trim ToLower if str Length 0 continue 34 Salazar initial blank space Console WriteLine if str CompareTo help
3. draw players ships left gr colorwidth 3 0 repeat i from 0 to num_landers 1 gr vec 2000 gt gt 2 lander_ draw start game text if game LANDI state ERS_X_POS i lt lt 3 4 LANDERS_Y_POS 4 0012 model GAME_STATE_MENU and game_counter2 amp 10 gr textmode 2 1 6 5 gr colorwidth 2 0 if game_counter2 gt 200 else gr text 4 0 start_string gr text 4 0 title_string copy bitmap to display gr copy onscreen_bu END RENDERING SI ee er ECTION TEE LEEELELES TITEL PETE LIL EAT ETL ETA ETI TEL IAT ET GAME_STATE_RUN clear bitmap gr clear INPUT SECTION the game is running LEETETELEEL EL ELL LER ETE ITEST PTT ET TA TTI EET LLL TATTLE 85 1 nes_buttons AE IE 1 PT elseif 1 get ge nes_b u nes_bu bounds END N tons amp N lander_angle ANG_5 ES F b t change in direction tons amp N lander_angle ANG_5 else R Ka ESAL EFT test ship angle lander_angle gt ANG_360 lander_angle ANG_360 lander_angle lt 0 lander_angle ANG_360 INPUT SECTION nes controller buttons Read_Gamepad IGHT Salazar PLELALTTE REEL ITA PLETE IAAT AEST TAA ELLA TIA T DATS ALI EDL 1
4. port number is in bits 31 16 return int ver gt gt 16 public static bool uploadGame String filePath verify that the file exists and that it has the correct file extension FileInfo fi new FileInfo filePath if fi Exists amp amp fi Extension ToLower eeprom 39 upload could not continue return false create and display the window HydraPropForm hpf new HydraPropForm specifies auto search for serial port SetSerialSearchMethod 0 specifies DTR for reset signal SetResetSignal 0 upload the game file string cfile filePath ToCharArray DownloadToPropeller filePath 3 close the window hpf Close upload was successful return true Salazar 40 A oe Salazar Appendix C Main Web Site ASP NET Page Language C AutoEventWireup true CodeFile Default aspx cs Inherits _Default gt lt DOCTYPE html PUBLIC W3C DTD XHTML 1 0 Transitional EN http www w3 org TR xhtml1 DTD xhtmll transitional dtd gt lt html xmlns http www w3 org 1999 xhtmlL gt lt head id Head1l runat server gt lt title gt HydraNet 3 Gaming System lt title gt lt head gt lt body gt lt form id forml runat server gt lt div gt lt h1 gt HydraNet 3 Gaming System lt h1 gt lt h3 gt CEN 4935 Senior Software Engineering Project Spring 2009 lt br gt B
5. abort if upload failed error message is already displayed send notification that upload failed connStrm WriteByte 0 close connections and exit connStrm Close conn Close return send notification that uploaded files are saved connStrm WriteByte 3 receive notification that game is uploaded to HYDRA if connStrm ReadByte 4 throw new Exception catch Exception uploadStatus ERROR connection with server failed return finally close connection with server connStrm Close conn Close the upload was successful uploadStatus Success 60 Salazar bool uploadFiles folder paths String rootDir Page Request PhysicalApplicationPath gameDir rootDir game_files uploaded file paths String gameFile gameDir game eeprom graphicsFile gameDir graphics zip manualFile gameDir manual txt graphics folder path String graphicsFolder gameDir graphics save the thr files try upldGameFile SaveAs gameFile upldImagesFile SaveAs graphicsFile upldManualFile SaveAs manualFile catch Exception uploadStatus ERROR could not save uploaded files return false try delete the images from previous game if Directory Exists graphicsFolder Directory Delete graphicsFolder true r
6. TIAL ALATA LITRE LES PFET EA CPE TELT LITA TAI IATA ELT ILS draw text gr textmode 2 1 5 3 gr colorwidth 2 0 1 draw fuel and num players gr text HUD_X_POS HUD_Y_POS hud_string 87 Salazar gr text LANDERS_X_POS LANDERS_Y_ POS landers_string itoa lander_fuel sbuffer gr text HUD_X_POS HUD_Y_POS 12 sbuffer draw vector objects draw mountain static for now gr colorwidth 1 0 gr plot 96 96 y 80 repeat i from 1 to 20 update y y mountain_scape i 1 draw line gr line 96 i 8 y finally mountainscape back to horizon gr line 96 96 draw landing zone gr colorwidth 3 0 gr plot 96 landing_zone 0 96 landing_zone 2 gr line 96 landing_zone 1 96 landing_zone 2 Fes ignore test if already landed if game_state lt gt GAME_STATE_LANDED test for player collision with terrain BEFORE we draw the player and thruster which would cause erroneous results scan 4 pixels from centroid of ship down to pierce terrain repeat i from 0 to 3 pixel_data Get_Pixel2 96 lander_wp_x 96 lander_wp_y i offscreen_buffer test the pixel data to see if there is a collision terrain if pixel_data 1 collision has occured set state to kill player game_state GAME_STATE_CRASHED quit draw player last on top of terrain fir
7. End section of code for developers TITTTTTTTTTTTTAT TTA OBJ usb FullDuplexSerial spin USB driver PUB start 70 Salazar 111111111 1 1 1 11111111 111111111111111111111111 11111111111 1 1111111 Start section of code for developers start method set the number of graphics objects setGraphicsSize 18 position the backgrounds 2nd background is invisible setGraphicsObj IMG_BG1 1 getScreenCenterX getScreenCenterY setGraphicsObj IMG_BG2 0 getScreenCenterxX getScreenCenterY End section of code for developers i IEEE EEE EEE EEE EEE EEE start the game startGame PUB update player input pos 111111111 1 1 1 1 1 1 11111111111111 1111111111111 1111111111111 1 1 111111 Start section of code for developers update method if input INPUT_ON set the player as active setPlayerStatus player 1 determine player s starting image facing left with no turbo if player playerImage player IMG_POL elseif player 1 playerImage player IMG_P1L elseif player playerImage player IMG_P2L elseif player 3 x playerImage player IMG_P3L enable player s image setGraphicsObj playerImage player 1 getScreenCenterx getScreenCenterY set turbo to off playerTurbo player 0 elseif input INPUT_OFF set the player as inactive setPlayerStatus player 0 setGraph
8. string key stuff byte sbu byte cur ter 17 r_key byte temp_key long dat on lon a es gamepad vars g nes_buttons state variables Salazar whole part decimal part velocity angular direction fuel of lander number of landers left terrain collision algorithm long pix el_data PIPE LALLA PPLE AAA LAAU LUA TALES LITE LALA LS POAT LEI SETA LISTS TELE LILLIA 1 1 eee OBJECT D ECLARATI ON S ECTI ON LIE LAD TA LIAL LIS Il LAAL ULIVA IAL IALA UI VALAA LAL IALA LOST IMT SLIT OTS IIIS T O BJ tv gr tv_drv_010 spin 1 graphics_drv_010 spin tantiate a tv object tantiate a graphics object ins ins MET ELETT ELIE ECE PET ELIOT ELIT LEE CEL ELATED PELLET ATT EET LEE EET EF 77 EXPORT P UBLICS LEE ETIT ELE ELIT PEE EUD EPI ETL IET ETE TETAS AI EL PI IT PLT BEET ETELIPE TEL ELE EEL EL LETTE TE LE EEEL EE ETAL ELIT ELA ET ITA TEE EIEL EEL FECES a 82 Salazar PUB start i j base base2 dx dy x y X2 y2 last_cos last_sin 1 PALA EAER AE L EET EEE E ALL TIAEL IE GLOBAL INITIALIZATION FLIP EIIEPT ISTE IAL IE ET IAT IS IIL AIT L TA ATT ATTA LISD TIA STI I PETA IEP L TILT start tv longmove tv_status tvparams paramcount tv_screen screen tv_colors colors tv start tv_status init colors each tile has sam
9. 0 lists all commands and their descriptions Console WriteLine Command t tDescription Console WriteLine t t tya Console WriteLine players t tlists which players are currently connected Console Writ ne help t tprovides a list of commands for using the server Console Writ ne exit t tshuts down connections and closes the server software H Ju else if str CompareTo exit 0 shuts down the server program broadcastToPlayers SERVER_SHUTDOWN Environment Exit 0 else if str CompareTo players 0 display total current player connections Console WriteLine Players connected numPlayers lists the player connections for int i 0 i lt MAX PLAYERS i Console Write Player i if players i active Console WriteLine connected else Console WriteLine disconnected ending blank space Console WriteLine returns the number of PNG graphics present in graphics folder int getNumGraphics string filepath Path GetDirectoryName Assembly GetExecutingAssembly GetNa me CodeBase Substring 6 game_files graphics DirectoryInfo dir new DirectoryInfo filepath return dir GetFiles png Length 35 Salazar returns the IPv4 address of the server string getIP4Address Ad
10. 20 lt lt 16 lander_y 60 lt lt 16 lander_dx 0 lander_dy 0 lander_angle ANG_90 game_state GAME_STATE_RUN GAME_STATE_MENU the game is running clear bi gr clear tmap 1 INPUT SECTION LEAL LALA LAL ELT ATL ITAL ELT IE get nes controlle nes_buttons N LE ttons amp N TG nes_bu game_sta 1 END INPUT SECTION DEEL ECT LETT EEET TIS IAT IDE ES 1 RENDERING SECTION TEE EETE LEE ALETE PL EILTEALTY draw text gr textmode 2 1 5 3 gr colorwidth 2 0 draw fuel and num gr text HUD_X_POS ES x b B 1 1 1 11 11 11 11 11 11 1 1 11 11 11 111 r buttons Read_Gamepad ES_START GAM HUD_Y_POS gr text LANDERS_X_POS E_STATE_START 11 11 11 11 11 11 11 11 11111 1 1 11 1 1 11 11 11 11 11 11111 players hud_string LANDERS_Y_POS landers_string 84 Salazar itoa lander_fuel sbuffer gr text HUD_X_POS HUD_Y_POS 12 sbuffer draw vector objects draw mountain static for now gr colorwidth 1 0 gr plot 96 y 80 96 repeat i from 1 to 20 update y y mountain_scape i 1 draw line gr line 96 i 8 y finall Ly mountainscape back to horizon gr line 96 96 draw landing zone gr colorwidth 3 0 gr plot 96 landing_zone 0 96 landing_zone 2 gr line 96 landing_zone 1 96 landing_zone 2
11. 27 CPi 4 alla d E C 3 9 Fy H BIS z A AEIEIHIE EE EIEEE 9 BIE CE CPB Ej ples L AIEEE JHH alle P25 Ca s s gt sje is gt s F lt e EE CD D i HIHIRI al HEISE PEIEE EER EE alsa a 3 3 HENE allgiisiz CZ aD 2 2 e 212 2 e aa lell 41 21F elfe 2 elfo aD are e 9 SIS 9 g RIS g cz CD 512 X 32 CP RAM RAM RAM E C2 CBD Cis CP coe Reset Delay 50 ms eo Brown Out sg Detector CLKSEL cmn RC Oscillator Pam 12 MHz 20 KHz Clock PLL PLLENA 1x 2x 4x Bx 16x l 16 must be SOFTRES aD oye 64 128 MHz PLLENA XO sciliator DC 80 MHz pecans OSCENA 4 8MHz OSCMODE OSCMODE 34 gt with Clock PLL CLKSEL Hub and Cog Interaction Figure 1 3 Propeller Chip Block Diagram Salazar 1 2 HYDRA Hardware Description Propeller Chip The HYDRA game console was built to work with the Parallax Propeller chip The chip architecture is shown in Figure 1 3 The propeller chip was designed by Chip Gracey of Parallax Inc The chip consists of eight cores more commonly called cogs These cogs are independent of each other The chip is a 32 bit RISC like architecture Moreover the propeller chip can run assembly language as well as a more high level language called Spin 3 The chip executes only 32 bit instructions Main Memory The amount of main memory provided in the HYDRA console is 64KB which is organized in two blocks each consisting of 32KB The
12. allocate 20 longs for the task stack DA 777 1111111 12 PUB Start 3 this is the first entry point the system will see when the PChip starts 14 execution ALWAYS starts on the first PUB in the source code for 15 the top level file 1717 spawn 2 COGs each with the Blink function and some stack space 18 COGNEW Blink 5 988 908 eblink_stack 19 COGNEH Blink i 500 002 eblink_stack 10 1 sit in infinite loop that is do not release COG 0 22 repeat while TRUE SKI AAA 18 Salazar Figure 4 1 Code segment a SPIN program Example 4 is a classical game called Mars Landers In this game each player tries to control a spaceship in which fuel is limited The purpose of this game is to try to land in the respective area before the ship runs out of fuel This game can be uploaded to the Hydra console from the network but not played through the Java applet However it can still be played in the Hydra console provided that its output is connected to a TV through RCA cables 19 Salazar Section 5 Conclusion To conclude several more games have been added to the HydraNet system Respectively the source code the user manual the dummy zip files and the executables have been included in a newly created folder residing on the server PC The respective links for downloading these files have been added to the website as well as shown in Figure 5 1 The reason why a dummy zip file is provided is because the HydraNet system req
13. break else make the byte by including input and player number outByte 0 byte inByte pNum send the input byte to the HYDRA sendToHydra outByte catch Exception end the loop for receiving game inputs break close the connection with the player client try client Client Close client Close catch Exception do nothing 31 Salazar send player off input to HYDRA just in case the player did not actually transmit it before the connection was terminated outByte 0 byte PLAYER_INPUT_OFF pNum sendToHydra outByte Console WriteLine Player player playerNumber 1 disconnected numPlayers decrement the number of connected players player conn null player active false deactivate player send out player disconnect message broadcastToPlayers byte PLAYERO_DISCONNECT player playerNumber T receives game state from HYDRA and sends to player clients void hydraToPlayers byte rec while true try rec byte hydra ReadByte send game state to all active players broadcastToPlayers rec catch Exception do nothing sends a byte message to all active players MethodImpl MethodImplOptions Synchronized void broadcastToPlayers byte message send the byte to all active players
14. images id x rec rec lt 254 read a se get object s y coordinate if rec connIn read lt 0 return lse if rec 255 continue lse if rec gt 241 amp amp readCommand rec continue lse images id y rec rec lt 254 read a se read the end byte if rec connIn read lt 0 return selse if rec gt 241 KK rec lt 254 readCommand rec read a continue catch IOException ex return redraw the game screen repaint end byte was received end byte was received Exception ex stream was terminated and 1 was returned start over on next packet command byte stream was terminated and 1 was returned start over on next packet command byte stream was terminated and 1 was returned command byte reacts to commands received from the server public void readCommand int command switch command case PLAYERO_CONNECT displayMessage Player 1 connected break true 1 sd 50 pub pub pub case PLAYER1 CONNECT displayMessage Player break case PLAYER2 CONNECT displayMessage Player break case PLAYER3 CONNECT displayMessage Player break case PLAYERO_ DISCONNECT displayMessage Player break case PLAYER1 DISCONNECT displa
15. 1 Salazar hex_table value FA PPL ALLAN LALLANA I IPE ILAL IAS ATLL PIPL IAT IIS PILI IEEE IAAP IA LL TIPPEE ESL ELL DATA SECTION 1 7 7P DAT TV PARAMETERS FOR DRIVER TLILI TAA BLELS IAEA ELELT TAA EEE ELTA EEL ETS LATA E EA PAPEL TS tvparams POLYGON OBJECTS lon lon lon lon lon lon lon lon lon lon lon lon lon lon WO 0 0 0 0000 00 00 0 0 0 status 1 enable 011_0000 pins 0000 mode 0 screen 0 colors x_tiles he y_tiles vc 10 hx timing stretch 1 Vx 0 ho 0 Vo 55_250_000 broadcast 0 auralcog STRELA ALI DET AL LLALLA LEL T A UALL IS PLAT LAAT LEIA LYS TLL lander_model word word word word word word word word 4000 ANG_0 8000 ANG_120 8000 ANG_240 94 Salazar word S8000 ANG_0 word 50 word U STRING STORAGE LAILEELIS ISI ELPA ATS EPA PAPI AA LUNII ATI IAAT IAS ELT IAT IAS hex_table byte 0123456789ABCDEF hud_string byte Fuel lbs 0 text landers_string byte Landers 0 text start_string byte Press Start 0 text title_string byte Mars Lander 0 text crash_string byte Crashed 0 text over_string byte Game Over 0 text landed_string byte Landed 0 text to show use of data driven rendering the mars terrain and landing zone are defined by data this way you can change the
16. 1 x Y 1 has to below a threshold absolute value of 1 angle of the ship must be within 5 degrees of 1 landing is successful 1 1 1 re acquire velocity in new scale lander_dx gt 10 lander_dy gt 10 test for landing zone the conditions are downward velocity horizontal vel ocity has to be below a threshold and the straight up don t want to break the landing gear if a and processed a state change is noted here down stream also the coordinate structure of the landing zone is used to determine if the ship is touching down on the landing zone but we could have with however tested for green which is what we paint the landing zone if we couldn t spare a color to paint the landing zone for color collision detection then we would 1 exercise have to do it the hard way with geometry so this is a good if lander_wp_x gt landing_zone 0 96 and lander_wp_x lt one 1 96 and lander_wp_y lt landing_zone 2 92 landing_z 1 7P 1 if y lt 0 and y y lt MAX_LANDER_TOUCHDOWN_YVEL and x x lt MAX_LANDER_TOUCHDOWN_XVEL gr colorwidth 1 0 gr plot 0 0 the eagle game_state END ANIMATION has landed GAME_STATE_LANDED SECTION TITITTTITTL ITAA TAT ATTA TAAL A TATA RENDERING SECTION
17. Console WriteLine endregion static void Main string args new HydraServer 37 GG SAG OG SE SG Ee si si si si si si si si si Salazar Appendix B HydraProp DLL Source Code C System System System System System System System System System Ng Ng ng ng ng ng ng ng ng Collections Generic ComponentModel Data Drawing Text Windows Forms Runtime InteropServices IO namespace HydraProp public partial class HydraPropForm prototypes to permit use of the region Propellent DLL prototypes DllImport Propellent dl1l CharSe CallingConvention Calli li Form Propellent dll functions CharSet Ansi ngConvention Cdecl llent IntPtr WinHandle h bool CharSet Ansi ngConvention Cdecl lerVersion CharSet Ansi ngConvention Cdecl SearchMethod uint Value CharSet Ansi static extern unsafe void InitPrope StorePrefs IntPtr RegPat DllImport Propellent dll CharSe CallingConvention Calli static extern unsafe uint GetPropel DllImport Propellent dll CharSe CallingConvention Calli static extern unsafe void SetSerial DllImport Propellent dl1l CharSet CallingConvention static extern u DllImport Propellent dl1l Charset CallingConvention static extern u DownloadCmd DllImport Propellent dll CallingConvention static exter endreg
18. read first bit of each game pad data is now ready to shift out 1 b first bit is ready nes_bits 0 t left controller nes_bits INA 5 INA 6 lt lt 8 step 7 read next 7 bits repeat i from 0 to 6 OUTA 3 1 JOY_CLK 1 Delay 1 OUTA 3 0 JOY_CLK 0 nes_bits nes_bits lt lt 1 nes_bits nes_bits INA 5 INA 6 lt lt 8 Delay 1 invert bits to make positive logic Salazar 92 Salazar nes_bits nes_bits amp SFFFF 1 7 LE End NES Game Paddle Read 1 7 AL E 1 7 LE PUB Delay count i X Y Z delay count times inner loop length repeat i from 0 to count U 7 TI EET TA PUB SinCos op angle xy if op COS angle 800 if angle amp 1000 if angle amp 800 angle angle 7000 xy word angle lt lt 1 else if angle amp 800 angle angle 7000 xy word angle lt lt 1 1 LET T T IAN AAE T AEL LL LILLIA 7P PUB itoa value string_ptr base factor i converts an integer into an ASCIIZ up to 99_999x string_ptr points to target storage to store converted string 10000 s place base 10_000 repeat i from 5 to 2 factor value base byte 0 string_ptrt hex_table factor value factor base 93 base 10 1 s position byte 0 string_ptr NULL terminate byte 0 string_ptr
19. ANIMATION SECTION FLELA TAS AI TSI IA TALE IAAT SALT PTAA AT AAA ATI ID AA ITT TASS 1 EE 1 apply thrust model if thruster is down lander_dx lander_dy lander_fuel lander_fuel expend fuel gt 0 and nes_buttons amp NES_ SinCos COS lander_angl SinCos SI 1 1 as as t_cos t_sin add gravity lander_dy GRAVI TY B N lander_angl scale down x y lander_dx gt lander_dy gt cache result for later computation 16 16 test for maximum magnitude of thrust if 1 1 m lan lan lan lan x x y y gt slow ship down lander_dx ove player der_x der_y der_wp_x MAX_LAND ER V EL lander_dx gt 7 lander_dy lander_dy gt 7 lander_dx lander_dy cache whole parts lander_x gt 1 der_wp_y lander_y gt 1 screen bounds test for player 86 if lander_wp_x Salazar gt SCREEN_WIDTH 2 lander_x SCREEN_WIDTH lt lt 16 elseif lander_wp_x lt SCREEN_WIDTH 2 if lander_wp_y lander_x SCREEN_WIDTH lt lt 16 gt SCREEN_HEIGHT 2 lander_y lander_dy lt lt lander_dy 0 elseif lander_wp_y lt SCREEN_HEIGHT 2 lander_y lander_dy lt lt lander_dy 0
20. ActionListener ction related variables Socket conn InputStream conntin OutputStream connOut conn private private private out implements KeyListener Runnable connection with the server incoming stream from server going stream to server graphics related class and variables private final static int SCREEN_SIZE_X 240 SCREEN_SIZE_Y 180 class GraphicObj Image img boolean visible false int x 0 y 0 private GraphicObj images private int numImages private Image graphicsBuffer private String message player input values private final static int INPUT_ON 240 player on reset INPUT_OFF 0 player off INPUT_UP 128 up INPUT_DOWN 64 down INPUT_LEFT 32 left INPUT_RIGHT 16 right INPUT_FIRE 48 fire command message values private final static int PLAYERO_CONNECT 241 PLAYER1_CONNECT 242 PLAYER2_CONNECT 243 PLAYER3_ CONNECT 244 PLAYERO_DISCONNECT 245 PLAYER1_DISCONNECT 246 PLAYER2_DISCONNECT 247 PLAYER3_DISCONNECT 248 DEV_UPLOADING 251 DEV_FINISHED 252 SERVER_SHUTDOWN 254 46 Salazar this method is called first public void init super cr graph try co co co catc di re catc di re try eine 5 eate the graphics buffer icsBuffer
21. code short repeat 1_000_000 transition back to starting state game_state GAME _STATE_START else if game_state GAME_STATE_OVER repeat 1_000_000 transition back to initialization state game_state GAME_STATE_INIT L if 1 check if landed game_s repeat transit game_stat tate _000_000 tion back t GAMI E STATE LANDI initializat O ED ion state te GAME C INI STATE T 89 END RE ND ERI NG S ECT ON TIPLE EIS EI ALA LISP EE LE PIT AIA SS EPI PEELE I PELL END MAI N GAME LOOP R EPE AT BLOCK 11 11 11 11 11 1 1 1 1 11 1 1 11 11 11 1 1 11 1111 11 11 11 111 1 Salazar LEE EA EEE 7P PUB Plot_Pixel x y video_buffer color video_offset pixel_value plot pixel calculation using BYTE aligned calcs 192x192 bitmap 12x12 tiles video_offset video_buffer x gt gt 4 192 4 x amp 1111 gt gt 2 y lt lt 2 read pixel group from memory pixel_valu byte video_offset mask AND out target bits so color mixing doesn t occur pixel_value pixel_value amp 00000011 lt lt x amp 11 lt lt 1 OR color with pixel value pixel_value pixel_value color lt lt x amp 11 lt lt 1 write pixel back to memory byte video_offse
22. createImage SCREEN_SIZI Ley X SCREEN _SIZE_Y connect to server and get network I O streams nn new Socket getDocumentBase getHost 5309 nnin conn getInputStream nnOut conn getOutputStream h UnknownHostException ex splayMessage Cannot connect to server false turn h IOException ex splayMessage Cannot connect to server false turn tell server that this is a player client connOut write 1 connOut flush if check if the connection was accepted by the server connIn read 1 server was not full connection accepted get the number of images and create the array if numImages connIn read 0 displayMessage Error getting images false return images new GraphicObj numImages this is used to wait for all images to load MediaTracker tracker new MediaTracker this create the images by downloading them from the server for int i 0 i lt numImages i images i new GraphicObj images i img get Image getDocumentBase game_files graphics it png tracker addImage images i img 0 wait for all images to load try tracker waitForAll catch InterruptedException e displayMessage Could not download graphics false return tell server that image download is complete 47 connOut write 1 connOut flush U notify the HYDR
23. page or dev anew game on the Developer page There is no need to worry about connecting and disconnecting If you are seeing this page a navigate away from this page or close the browser window To attempt to reconnect or to s View the game manual opens in new window tab The game controls are A Left D Right W Up S Down J Action To play you must first click within the screen area Figure 2 2 Hydra Player Web Site 15 Salazar Section 3 Prospective Solution Adding more games to the HydraNet3 system consists of building up games in the Spin language and making them available to players that connect to the system However this is not an easy task Before adding a game we need to code it Thankfully one can find many classic games available along with their respective source code from the documentation provided with the Hydra Game Development Kit Thus for instance one of these games could be chosen The source code of the chosen game would be slightly modified depending on the needs of the HydraNet4 system A directory containing all the added games would be added to the HydraNet3 system Then the compiled files and the source code for each game would be placed in the newly created games directory The website would be slightly modified First it will provide links to the newly added games so the client player would have the ability to choose from a variety of games Once a player loads a game the game will star
24. the height visible There are also no restrictions on each image size so if an object must be more than halfway offscreen a transparent border can be placed around the image to make it look as though the object is almost or completely off the game screen This permits development features such as scrolling 56 Salazar backgrounds and wrap around player movements rounds and wrap around player movements lt p gt lt p gt Players download all graphics from the server before starting the game so larger image file sizes within reason will not degrade the performance of the HydraNet 3 game lt p gt lt h3 gt Code sections for developers lt h3 gt lt p gt There are several sections in the template source code that are labeled for developer use lt p gt lt ul gt lt li gt lt span class stylel gt Constant variables lt span gt This section of code is for declaring any variables you need that will never change Adding constant variables to this section is preferred over adding them to the regular variables section lt li gt lt li gt lt span class stylel gt Variables lt span gt This section of code is for declaring any variables that may need to be updated during game execution lt li gt lt li gt lt span class stylel gt Start method lt span gt This section of code is used for any initialization The setGraphicsSize method must be called in this section This method must be
25. the means to upload your games to the server lt p gt lt p gt Go back to the lt a href Default aspx gt main page lt a gt or play the current game on the lt a href Player aspx gt Player page lt a gt lt p gt lt h2 gt Game uploader lt h2 gt lt p gt To upload a game for the HydraNet 3 system three files are required lt p gt lt ul gt lt li gt lt span class stylel gt Compiled game file lt span gt This file must be created using the Propeller Tool software which is explained in the tutorial The file type must be EEPROM lt 1i gt lt li gt lt span class stylel gt Zipped images file lt span gt This zip file must contain only PNG images which meet the requirements in the tutorial These images must be in the root directory of the zip file and the zip file must not contain any subfolders The file type must be ZIP lt 1i gt lt li gt lt span class stylel gt Game manual file lt span gt This text file can contain anything you want the players to know about the game A link to this document is provided 53 Salazar on the main and player pages so that others can understand the rules and controls of the game The file type must be TXT lt 1i gt lt ul gt lt p gt Select the files and then click the amp quot Upload Files quot button lt p gt lt p gt Compiled game file eeprom lt br gt lt asp FileUpload ID upldGameFile runat server meta resourcekey upl
26. tkk fi tkarvine pre wrap css3 mozilla opera ie html Browser specific not valid styles to make preformatted text wrap S pre white space pre wrap css 3 white space moz pre wrap Mozilla since 1999 white space pre wrap Opera 4 6 white space o pre wrap Opera 7 word wrap break word Internet Explorer 5 5 lt style gt lt head gt lt body gt lt form id forml runat server gt lt div gt lt pre gt lt include virtual game_files manual txt gt lt pre gt lt div gt lt form gt lt body gt lt html gt 63 Salazar Appendix I Hydra Game Example 1 Source Code Spin V SELIL LLLI EIA LALIE ILLL TIT TATTTI ATT I EE ETT A ALALLA Game that allows 4 people to play from remote computers over a network 11111111 1111 111111 11 11 1 11 1 1 111 1 11 1 1 1 111111111111 111 11111 1111111 1 1 1 1 111111 CON set clock mode speed _clkmode _xXinf req xt 10_ screen size SCRE EN _SIZE_ SCRE EN _SIZE_ Y X all pll8x 000_000 240 180 max number of graphics GRAPHICS_MAX p on INPUT_ON INPUT_OFF INPUT_UP INPUT_DOWN INPUT_LEFT INPUT_RIGHT INPUT_FIRE max PLAYER_MAX 100 layer input bit codes ly uses first 4 bits 1111_0000 0000_0000 1000_0000 0100_0000 0010_0000 0001_0000 0011
27. tplayerTurbo player gt 0 RIGHT ght playerimg tGraphicsObjxX playerImg 2 playerTurbo player tScreenSizeX lt End section of c 1111 1 11111111 EEE LT E TTT Start section of c ode for developers TITTTTTTTTTATTTTAT TATA AAA ATTA AAA AAA AAA AAA ATT TT TTT ZAE ERT LITLI TUILL LLALL IIL ALILI TT ode for developers developer defined methods PUB getPlayerGraphicObj player if player return IMG _PLAYERO elseif player return IMG PLAYER elseif player return IMG _PLAYER2 elseif player return IMG _PLAYER3 End section of code for developers t FLIELI LITLILLTE LELLI LLAL LILII L ALALLE EEE PUB startGame usb start 31 30 start the USB connection 0 9600 receive pin transmit pin mode baud rate start a new cog to read all player inputs cognew receiveInput Q receiveInputsStack 66 Salazar start a new cog to send game state to players cognew sendGraphics sendGraphicsStack PUB receivelInput rec player input repeat receive the byte containing player number and input rec usb rxtime 5 get player number last 4 bits player rec amp 0000_1111 get input code first 4 bits input rec amp 1111_0000 update the player s position update player input PUB sendGraphics id tempID send info on active graphics objects send id x y of each active graphi
28. A that player is starting session connOut write INPUT_ON connOut flush receive player connect message readCommand conniIn read start listening for key presses addKeyListener this start receiving graphics info stream new Thread this start jelse server was full connection denied displayMessage Server is full Try again later close the connection stop catch IOException ex stores the next game screen into the graphics buffer public void updateGraphics Graphics g graphicsBuffer getGraphics g clearRect 0 0 SCREEN_SIZE_X SCREEN_SIZE_Y if images nul1 for int i 0 i lt numImages itt if images i visible calculate image offset to its center int xOffset images i img getWidth this 2 int yOffset images i img getHeight this 2 g drawImage images i img images i x xOffset SCREEN_SIZE_Y images i y yOffset this display the message if it exists if message length gt 0 g setColor Color RED g drawString message 5 15 required for JApplet paints the applet window public void paint Graphics g updateGraphics g drawImage graphicsBuffer 0 0 this Salazar false 48 Salazar required for JApplet runs when the applet closes public void stop super stop try removes images from cache which avoids the pro
29. Exception ex return displays a message in the top left corner of the game screen is true then the messag public void displayMessage String message this message message repaint if timed Timer t new Timer 3000 this t setRepeats false t start if timed will be displayed for only a short time boolean timed required for ActionListener clears the displayed message after a certain time public void actionPerformed ActionEvent e message repaint 52 Salazar Appendix F Developer Web Site ASP NET lt Page Language C AutoEventWireup true CodeFile Developer aspx cs Inherits Dev Culture auto meta resourcekey PageResourcel UICulture auto loper o 3 gt lt DOCTYPE html PUBLIC W3C DTD XHTML 1 0 Transitional EN http www w3 org TR xhtml1 DTD xhtml1 transitional dtd gt lt html xmlns http www w3 o0org 1999 xhtm1 gt lt head id Head1 runat server gt lt title gt HydraNet 3 Developer lt title gt lt style type text css gt style1 text decoration underline lt style gt lt head gt lt body gt lt form id form1 runat server gt lt div gt lt h1 gt HydraNet 3 Developer lt h1 gt lt p gt Welcome to the HydraNet 3 Developer This page includes a tutorial on how to develop games for HydraNet 3 and
30. IL IIA IIE EITAL TAS ATLAS PIPL IAAI IIS PILI NIILL AL IA LEAT I T 0 1 2 of f visible invisible O0 off on Sppmmm pins Sccinp chroma interlace ntsc pal swap pointer to screen words pointer to colors longs horizontal cells vertical cells horizontal cell expansion vertical cell expansion horizontal offset vertical offset broadcast frequency Hz aural fm cog screen x_tiles y_tiles TIER L EL VAR long tv_status only long tv_enable only long tv_pins only long tv_mode only long tv_screen only long tv_colors only long tv_hc only long tv_vc only long tv_hx only long tv_vx only long tv_ho only long tv_vo only long tv_broadcast only long tv_auralcog only word long colors 64 long lander_state long lander_x long lander_y P 1 f player s lander all in fixed point 16 16 storage for screen tile map color look up table read writ writ writ writ writ writ writ writ writ writ writ writ writ 81 L lan lan lon lon lan lan lan lon lon lon lon lon g lan g num game word gam word gam word gam random byte ran der_wp_xX der_wp_y der_dp_x der_dp_y der_dx der_dy der_angl der_fuel landers e_ state e_counterl e_counter2 stuff dom_count Ler
31. Inc also included with Propeller Tool download above lt li gt lt ul gt lt p gt Two simple gam xamples are included for you to better understand how a game is built or if you wish to restore the HydraNet 3 system to an original state lt p gt lt ul gt lt li gt Example 1 shows how to get 4 players to move about a static background lt ul gt lt li gt lt a href game_examples gam xl eeprom gt Compiled game lt a gt lt li gt lt li gt lt a href game_examples gam xl code spin gt Source code lt a gt lt 1i gt lt li gt lt a href game_examples gam xl images zip gt Images lt a gt zipped lt li gt lt li gt lt a href game_examples gam xl manual txt gt Manual lt a gt lt br gt lt li gt lt ul gt lt li gt lt li gt Example 2 shows how to get 4 players to move between two backgrounds and how to get the player images to change based on movement and turbo state lt ul gt 55 lt ul lt h3 gt lt p gt lt p gt lt ul gt lt ul lt p gt Salazar lt li gt lt a href game_examples gam x2 eeprom gt Compiled game lt a gt lt 1li gt lt li gt lt a href game_examples gam x2 code spin gt Source code lt a gt lt 1i gt lt li gt lt a href game_examples gam x2 images zip gt Images lt a gt zipped lt li gt lt li gt lt a href game_examples gam x2 manual txt gt Manual lt a gt lt li gt
32. L U PUB getScree return SCR PUB getScree return SCR PUB getScr he player to be active 0000_0001 lt lt id pStatus return get PUB getScr return get e player to be inactive s 1111_1110 amp pStatus d 1 s 1111_1101 amp pStatus d 2 s 1111_1011 amp pStatus d 3 s 1111_0111 amp pStatus nSizex EEN_SIZE_X nSizeyY KEN SIZE_Y nCenterX ScreenSizeX 2 nCentery ScreenSizeY 2 Salazar 68 Salazar Appendix J Hydra Game Example 2 Source Code Spin V SELIL LLLI EIA LALIE ILLL TIT TATTTI ATT I EE ETT A ALALLA Game that allows 4 people to play from remote computers over a network 11111111 1111 111111 11 11 1 11 1 1 111 1 11 1 1 1 111111111111 111 11111 1111111 1 1 1 1 111111 CON set clock _clkmode _xinfreq screen si SCREEN_SIZE_ SCREEN_SIZE_ max numbe mode speed xtall pll8x 10_000_000 Ze X 240 Y 180 r of graphics GRAPHICS_MAX 100 layer in nly uses PUT_LEFT PUT_RIGHT PUT_FIRE P O P O PUT_OFF P UP P D D D D HHHHHHH 222422242224 PLAYER_MAX put bit codes first 4 bits 1111_0000 0000_0000 1000_0000 0100_0000 0010_0000 0001_0000 0011_0000 4 objects allowed Since last 4 bits are for player flags player on reset player off up down left r
33. NTAL MARS LANDER DEMO PROGRAM AUTHOR Andre LaMothe LAST MODIFIED 5 10 06 VERSION 1 1 COMMENTS implements simple lunar lander collision works landing CONTROLS gamepad must be plugged in Start Start Thrust B Rotate Right Dpad Right Rotate Left W fuel works try adding sound and changing the terrain etc 1 1 1 1 1 1 Dpad Left LILAPEIELI ITS ELI L ALIS ELIT TI IA ILLS PEEL II AA TT I OTL IP CTIA TI IIIT TST EP EE IIIS TI 1 7 FREES EA CONSTANTS SECTION FALTAIAS ED ALE EATALE TA LAT EL ELIT AT IE AA TAS AAT ETA TAD ATA TIT EL PEI A IIIS T CON _clkmode xtall pll amp x enable external clock and pll times 4 _xinfregq 10_000_000 0000 set frequency to 10 MHZ plus some error _stack 2400 2400 100 gt gt 2 accomodate display memory and stack graphics driver and screen constants PARAMCOUNT 14 OE SCREEN BUFFER 3800 offscreen buffer ONSCREEN_ BUFFER 5C00 onscreen buffer size of graphics tile map X_TILES 12 Y_TILES 12 78 SCREEN_WIDTH 192 SCREEN_HEIGHT 192 text position constants HUD_X_POS SCREEN_WIDTH 2 10 HUD_Y_POS SCREEN_HEIGHT 2 1 14 LANDERS_X_POS SCREEN_WID
34. OL_DarkGrey COL_Grey COL_LightGrey COL_BrightGre COL_White COL _Blue COL_Blue2 COL_Purple COL_Magenta COL_Magenta2 COL_Red COL_Orange COL_Brown COL_Yellow COL_YelGrn COL_Green COL_Green COL_Green COL_Cyan COL_Cyan2 COL_Cyan3 N Ww each palett ID 0 Ss CO W SCl C2 C3 SCB 20 0D odings S00000001 600000010 00000100 00001000 600010000 00100000 01000000 610000000 Salazar color constant s to make setting colors for parallax graphics 60000_0010 60000_001 0000_0100 0000_0101 y 0000_0110 0000_0111 60000_1 0001 60010 0011 60100 ll o 101 110 ll ol ll o 2 Oy 1 oll o ol em e EF aD ee a ll o amp oO oll oA o 5 a Op La ll o ped ma ee ll o 5 a o 5 T ET T E I OE I T E o O73 T 4 e entry is color 1 color 0 COLOR_O COL Black lt lt a LONG arranged like so color 3 color 2 0 80 1 COLO COLO COLO R_1 COL_Green lt lt 8 R_2 COL_White lt lt 16 R_3 COL_Red lt lt 24 Salazar PIPL ELIDA LIS ELLA ATID RIEL PTS IATL LAI PL I AA I PI SALI II IP EIT APTI SEATTLE 1 LIIITE VARI ABLES SECTION PAPE LALIT I
35. Salazar Adding Functionality to the HydraNet3 System Santiago Salazar CNT 4104 Software Project in Computer Networks Dr Janusz Zalewski Florida Gulf Coast University September 19 2011 Table of Contents Section 1 Introduction Section 2 Definition of the Problem Section 3 Prospective Solution Section 4 Implementation Section 5 Conclusion Section 6 References Appendix A Use Manual Appendix B Server Source Code C Appendix C HydraProp DLL Source Code C Appendix D Main Web Site ASP NET Appendix E Player Web Site ASP NET Appendix F Player Client Applet Source Code Java Appendix G Developer Web Site ASP NET Appendix H Developer Client Source Code ASP NET Appendix Hydra Game Example 1 Source Code Spin Appendix J Hydra Game Example 2 Source Code Spin Appendix K Hydra Game Example 3 Source Code Spin Appendix L Hydra Game Example 4 Source Code Spin Salazar Salazar Section 1 Introduction The HYDRA Game Development Kit is a platform used to learn game development The HYDRA Game Development Kit was designed by Andre LaMothe 1 He is the founder of Xtreme Games LLC the Xtreme Games Developers Conference and Nurve Networks LLC This platform is based on a Parallax s propeller multiprocessor chip This platform is known by its easy programmability and thus game developers are only assumed to have some basic understanding of any programming language similar to C The HYDRA Gam
36. T LOTS IIIS SS PUB Start 1 h starts execution ALWAYS starts on the top level file spawn 2 COGs each with the COGNEW Blink 2_000_000 COGNEW Blink 20_000_000 sit in infinite loop repeat while TRUE that is do not rel is is the first entry point the syste Bl the first PUI P ink 0 l lease COG U m will see when the PChip B in the source code for unction and some stack space blink_stack 0 blink_stack 1 TILA LAA ET PALLIAT PTET LATTA IA ALT ST PELL AAT ATT AA TIP AAA SIS A ETT ALP EL LED on the into UNE4 is sent as a the results 1 111 1111 PUB Blink rate this is the parallel function it simple blinks the debug hydra note is must set the direction output and then falls an infinite loop and turns the LED on off with a delay co the interesting thing to realize is that the rate parm when we launch the COG so there will be 2 COGS running this SAME infinite loop but each with a differnet blink rate will be a blinking light that has both one constant blink rate with another super imposed on it DI RA 0 repeat while TRUE OUTA 0 wal 1 OUTA 0 tent CNT rate 77 Salazar Appendix L Hydra Game Example 4 Source Code Spin 1 LEZE EEE EEE ELA VA ECT EEE EEE ELTA TELS ELT TELL ERY EXPERIME
37. TH 2 12 2 12 LANDERS_Y_POS SCREEN_HEIGHT 2 1 14 lander physics model MAX _LANDER_VEL 4 MAX_LANDER_TOUCHDOWN_YVEL 100 MAX_LANDER_TOUCHDOWN_XVEL 20 GRAVITY 0000_0100 angular constants to make object declarations easier ANG_O 0000 ANG_360 2000 ANG_240 2000 2 3 ANG_180 2000 2 ANG_120 2000 3 ANG_90 2000 4 ANG_60 2000 6 ANG_45 2000 8 ANG_30 2000 12 ANG_22_5 2000 16 ANG_15 2000 24 ANG_10 2000 36 ANG_5 2000 72 constants for math functions SIN COS 1 game states 0 GAME _ STATE INIT GAME _ STATE GAME _ STATE GAME _ STATE GAME _ STATE GAME _ STATE_ GAME_STATE_ game object states OBJECT_STATE_DEAD OBJECT_STATE_ALIVE OBJECT_STATE_DYING OBJECT_STATE_FROZEN control interface DOR WNEF CO 00_01 00_02 00_04 00_08 Salazar 79 THRUST_BUTTON_I FIRE_BUTTON control key KB LEFT ARROW KB _ RIGHT_ARRO KB _UP_ARROW KB DOWN_ARROW KB KB KB SPACE ENTER NES bit enc NES RIGHT NES_LEFT NES_DOWN NES_UP NES START NES_SELECT NES_B NES_A setup easier COL_Black C
38. _0000 4 objects allowed since last 4 bits are for player flags player on reset player off up down Left right fire number of players allowed i AIAALL AAAA AAAI AAAA ALAALA AALAN L AAAA AALALA ALALLA Start section of code for developers constant variables graphics object ID values IMG_BACKGROUND 0 IMG_P IMG_P IMG_P IMG_P AAYERO AAYERI1 AAYER2 me WN EF AAYER3 End section of code for developers AE AEAEE AET AE LA T AE ET ATE AA LIE IAE VAR number of graphics objects within game graphicsSize graphicsVisible GRAPHICS_MAX byte byte byte byte graphicsX GRAPHICS_MAX graphicsY GRAPHICS_MAX 64 Salazar byte containing bit flags for each active player byte pStatus stack for receiving player inputs long receiveInputStack 100 stack for sending graphics long sendGraphicsStack 100 11111111 1 1 1 1 1 1 11111111111111 111111111111111111111111111 11 111111 Start section of code for developers variables turbo for player movement byte playerTurbo PLAYER_MAX End section of code for developers 111111111 1 1 1 1 11 11 11111111111111111111111111111111111111 1 1 1111111 OBJ usb FullDuplexSerial spin USB driver PUB start L EEE EEE E EEE EEE EI EEE EEE AEAEE LEE Start section of code for developers start method set the number of graphics objects setGraphicsSi
39. apted from http aspnet 4guysfromrolla com articles 071807 1 aspx string IP4Address String Empty foreach IPAddress ip in Dns GetHostAddresses Dns GetHostName if ip AddressFamily ToString InterNetwork IP4Address ip ToString break if IP4Address String Empty return IP4Address foreach IPAddress IPA in Dns GetHostAddresses Dns GetHostName if IPA AddressFamily ToString InterNetwork IP4Address IPA ToString break return IP4Address endregion region HYDRA methods connects to the HYDRA via serial over USB unsafe void connectToHydra Console WriteLine Console WriteLine Connecting to the HYDRA while true auto scan for port number int port HydraPropForm getHydraComPort create serial port hydra new SerialPort COM port 9600 Parity None 8 StopBits One open serial port try hydra Open 36 Salazar break catch Exception while true check if user wants to try again Console Write Could not connect to HYDRA Try again by And Z s string s Console ReadLine ToLower if s CompareTo y 0 break else if s CompareTo n 0 Console WriteLine Cannot connect to the HYDRA Closing server Environment Exit 0 Console WriteLine The server is connected to the HYDRA
40. ar Appendix B Server Source Code C Net Net Sockets Runtime CompilerServices Runtime InteropServices IO TO Ports Threading Reflection HydraProp namespace HydraServer class HydraServer regi a class on Variables and classes simple class to store player info Player public Thread thread public TepClient conn public int playerNumber 0 public bool active false maximum allowed players const va int a va TcpLi Playe TcpC1l Seria va Threa int MAX_PLAYERS 4 riables to keep track of connected players umPlayers 0 riables for connections stener server r players new Player MAX_PLAYERS ient devConn lPort hydra riables for other threads d consoleThread hydraThread command codes for players values must be in range of 241 254 const P P D a O s TD byte PLAYERO_CONNECT 241 AYER1_CONNECT 242 AYER2 CONNECT 243 AYER3_ CONNECT 244 D AYERU0 DTSCONN AAYER1_DISCONN AAYER2_DISCONN AAYER3_DISCONN CT 245 CT 246 CT 247 CT 248 28 endregion Salazar OU Gl Gl UPLOADING 251 FINISHED 252 SERV x R_SHUTDOWN 254 PLAY D R_INPUT_OFF 0 player s off signal HydraServer title and welcome messa
41. ayer gaming However the game itself is very simple in nature since the goal of this project was to achieve multiplayer capabilities through a client server architecture In this system the Hydra console is connected to a server computer Client computers can connect to the HydraNet3 system through the following website http 69 88 163 18 samarks Default aspx Detailed information about the previous projects can be found here as well In order to play with the HydraNet3 system the server needs to run a program that constantly checks for incoming connection The server is set up the server in a way that this program is constantly running Then any computer connected to the Internet can visit the HydraNet3 website and go to the HydraNet3 player link A Java applet will open up and the game is contained there Then the user can start playing along with other connected players One of the most feasible extensions to the HydraNet3 system is to add more games Respective links to the new games can be placed in the HydraNet3 system s web site Thus players have the opportunity to choose from a variety of games when connecting to the HydraNet3 system However one has to keep in mind that the Hydra console can run only one game at any given moment In order to play a user needs to go to the following website http 69 88 163 18 samarks Default aspx as shown in the Figure 2 1 Then click on the link Player page This would take you to t
42. bControls public partial class Developer protected void Page_Load object sender protected void btnUpload_Click object s UlL WebControls WebParts do nothing verify that the files exist upldGameFile if System Web UI Page EventArgs e nder EventArgs e HasFile else exit upldManualFile HasFile upldiImagesFile HasFile the method uploadStatus ERROR not enough files were uploaded return verify that the files have the correct extensions else exit the method if checkFileExt upldGameFile FileName eeprom checkFileExt upldImagesFile FileName zip checkFileExt upldManualFile FileName txt uploadStatus ERROR at least one file does not have the correct extension return connect to the server TepClient conn Stream connStrm 5309 try conn new TcpClient localhost connStrm conn GetStream catch Exception 1 59 Salazar uploadStatus ERROR could not connect to server return try tell server that this a developer client connStrm WriteByte 0 send notification that developer is ready to download connStrm WriteByte 1 receive notification that server has closed other connections if connStrm ReadByte 2 throw new Exception save uploaded files if uploadFiles
43. be found there as well Thus a mechanism for loading games to the Hydra console from a remote location is already in existence This mechanism is slightly modified in such a way that after the client players chose a game to play a sequence of instructions is generated to load the game into the Hydra console After loading the appropriate game in the Hydra console the client player can proceed to play the game Some Spin programs have been successfully loaded into the Hydra console But only through the developer tool that comes with the kit Therefore at least theoretically this is possible Some games and Spin programs have been successfully uploaded to the HydraNet web site as shown in Figure 4 1 The respective links have been placed there as well The new games are basically Example 3 and Example 4 Example 3 is a spin language program that turns ON OFF the debug led in the Hydra console Note that in the source code the frequency can be changed as shown in Figure 4 1 This frequency determines the speed at which the debug LED turn ON and OFF For Example 3 a code segment in which the user can change the frequency of the clock ticks is shown in Figure 4 1 blinkO1 Full Source Condensed Summary Document _clkmode xtali pll x enable external clock and pll times 4 _xinfreq 10 000 000 set frequency to 10 MHZ _stack 40 accomodate display memory and stack 7 VAR 9 long blink_stack 20
44. ble B getGraphicsObjxX id return graphicsX id B setGraphicsObjX id x graphicsX id x B getGraphicsObjY id return graphicsyY id B setGraphicsObjY id y graphicsY id y 75 Salazar PUB getPlayerMax return PLAYER_MAX PUB getPlayerStatus id temp checks to see if the player is active temp 1 lt lt id amp pStatus return temp gt gt id PUB setPlayerStatus id active if active sets the player to be active pStatus 0000_0001 lt lt id pStatus else set the player to be inactive if id pStatus 1111_1110 amp pStatus elseif id 1 pStatus 1111_1101 amp pStatus elseif id 2 pStatus 1111_1011 amp pStatus elseif id 3 pStatus 1111_0111 amp pStatus PUB getScreenSizexX return SCREEN_SIZE_X PUB getScreenSizeY return SCREEN_SIZE_Y T PUB getScreenCenterx return getScreenSizeXx 2 PUB getScreenCentery return getScreenSizeY 2 76 CON _clkmode times 4 _xinfreq _ stack stack VAR Appendix K Hydra Game Example 3 Source Code Spin xtall pll4x 40_000_000 40 long blink_stack 20 stack enabl set accon Vos le external c frequency to nodate display memory and 10 MHZ Salazar Lock and pll allocate 20 longs for the task PLP ELIT RE LE TI LET LNA T AAA LALA IAAT TS TAAL TELAT PPS ADIT IATL EI
45. blem when a new game is loaded some of the old images are displayed for int i 0 i lt images length i images i img flush notify HYDRA that player is ending session connOut write INPUT_OFF connOut flush conniIn close connOut close conn close catch IOException ex return catch NullPointerException ex return receive graphics stream from HYDRA public void run int rec 0 id 0 boolean visible false do try if rec connIn read lt 0 return stream was terminated and 1 was returned catch IOException ex return swhile rec 255 while true try get object s ID and visibility if rec connIn read lt 0O return stream was terminated and 1 was returned selse if rec 255 continue end byte was received start over on next packet else if rec gt 240 KK rec lt 254 readCommand rec read a command byte continue jelse determine visibility if rec gt gt 7 1 visible true jelse visible false 49 save the id id rec amp 127 save the visibility try Salazar id amp 0111_1111 images id visible visible catch ArrayIndexOutOfBounds continue get object s x coordinate if rec connIn read lt 0O return lse if rec 255 continue lse if rec gt 241 amp amp readCommand rec continue lse
46. cs object repeat if pStatus gt 0 only send if players are connected repeat id from 0 to graphicsSize 1 if getGraphicsObjVisible id tempID id 1000_0000 indicates that the object is visible else tempID id send graphics ID number and visibility usb tx tempID object s x coordinate sb tx graphicsxX id c object s y coordinate sb tx graphicsY id c send end byte indicating that the next byte will belong to the next object usb tx 1111_1111 PUB getGraphicsSize return graphicsSize PUB setGraphicsSize size graphicsSize size PUB setGraphicsObj id visible x y setGraphicsObjVisible id visible setGraphicsObjxX id x setGraphicsObjY id y PUB getGraphicsObjVisible id return graphicsVisible id 67 graphicsVi PUB setGraphicsObjVisible id visible sible id visible graphicsx graphicsy PUB getPlaye PUB getPlaye checks L temp 1 lt return te PUB setPlaye if active sets t PUB getGraphicsobjX id return graphicsX id PUB setGraphicsObjX id x id x PUB getGraphicsObjY id return graphicsyY id PUB setGraphicsObjY id y id y rMax return PLAYER_MAX rStatus id temp o see if the player is active lt id amp pStatus mp gt gt id rStatus id active pStatus else set th if id pStatu elseif i DSL aL U elseif i pStatu elseif i DSL a
47. cture HYDRA Game System Application Game Simulator PC Application Game Simulator PC Application Game Simulator PC A y A Vv A y Client Transport Layer Software PC Client Transport Layer Software PC Client Transport Layer Software PC A A A Server Transport Layer Software PC A A y Transmitter USB Driver HYDRA A A Application Game HYDRA Figure 1 9 Basic Network Layer Organization 11 Salazar 1 3 3 HydraNet 3 This being the third HYDRA project is yet again another extension of HydraNet 2 However this project was solely created by Scott Marks In this extension game graphics and a web interface are introduced It also allows developers to create games for the HydraNet system 1 The main website consists of a player web site and a developer website The players can play with the Hydra console through the player s web site However if one want to develop game for the Hydra console which are written in Spin language The developer s web site provides instruction on how to do so Thus the users or better yet developers can create their own games uploaded into the Hydra console thorough the server and then start playing their own games The instructions of how to upload games into the Hydra console from the Internet are as well provided on the
48. d to the Hydra console Since this file has been already compiled by the Propeller Tool it is guaranteed that the server will successfully be able to upload that particular file into the Hydra console Finally another method that tries to address the issue of safety in regards to the flow of data is that for the most part the developers of the Hydra System have total control of the data once it has been uploaded to the computer server hosting the Hydra console Although this method is less significant than the others it is important to note that no people connected to the Hydra system can in any way have control of the data flow except when playing a video game which is very secure and stable since there are only a predetermined set of inputs and a game has specific handlers to take care of those inputs 22 Salazar Section 6 References 1 HYDRA Game Development Kit XGameStation Video Game System Development 2011 Nurve Networks LLC 12 October 2011 lt http www xgamestation com view_product php id 33 gt 2 Marks S and Haberkamp R Programming an Interface for the HYDRA game Development Kit April 28 2008 HYDRA Network Control and Visualization December 15 2008 Marks S HYDRA Network Control and Graphics March 11 2009 lt http 69 88 163 18 samarks Default aspx gt Florida Gulf Coast University 3 LaMothe A Game Programming for the Propeller Powered HYDRA 2006 Nurve Network
49. dGameFileResourcel gt lt p gt lt p gt Zipped images file zip lt br gt lt asp FileUpload ID upldiImagesFile runat server meta resourcekey upldImagesFileResourcel gt lt p gt lt p gt Game manual file txt lt br gt lt asp FileUpload ID upldManualFile runat server meta resourcekey upldManualFileResourcel gt lt p gt lt p gt lt asp Button ID btnUpload runat server meta resourcekey btnUploadResourcel OnClick btnUpload_Click Text Upload Files CausesValidation False gt nbsp amp nbsp lt asp Label ID l1blUploadStatus runat server meta resourcekey l1b1lUploadStatusResourcel Text upload status Visible False Style font styl italic color CC0000 gt lt asp Label gt lt p gt lt p gt amp nbsp lt p gt lt h2 gt Development tutorial lt h2 gt lt h3 gt Download and install the Propeller IDE lt h3 gt lt p gt The files written in the Spin programming language for the HYDRA can be edited in a normal text editor such as Notepad or in the Propeller Tool However to upload the game to the HYDRA it must first be compiled using the Propeller Tool which can be downloaded for free here lt p gt lt dl gt lt dd gt lt a href http www parallax com tabid 442 Default aspx target _blank gt Download the Parallax Propeller Tool Software and Propeller Manual lt a gt lt dd g
50. developer s web site The user just basically needs to upload a set of three files into the system The first and most important one being the executable file of the actual game to program The second one being the source code and possibly a zip file containing pictures if they are used in the game Finally the system requires a text file named manual to be uploaded as well This is basically a user s manual that describes how to play the game When this set of files are uploaded successfully through the developer s page a message saying success is displayed back to the screen 1 3 4 HydraNet 4 This project is the last extension of the Hydra system It is developed by Jinlong Fan In this instance the contents of the Hydra game re enriched the characters can now move their heads and legs and the number of pictures is increased thus augmenting the graphical aspects of the game This project dramatically improves the graphics of the older game which is implemented in the following way First the computation of coordinates is computed by the Hydra console as the player s input is received Second these coordinates are sent back to the server hosting the Hydra console and the Java applet takes these coordinates and uses them to display pictures on the screen Thus the end user is able to see them in their web browser 12 Salazar Section 2 Definition of the Problem Currently the HydraNet3 system supports online multipl
51. e gt gt x amp 1111 lt lt 1 pixel value will be from 0 3 return pixel_value LIAL SEA LIS AELG IA IP TALS EAA ELA L SY PAA PIAL SAAS LSS AIP TALS AIT LET EAL IA LSS ieee eas PUB Rand retval random_counter 1 random_counter random_counter lt lt 6 random_counter lt lt 2 random_counter lt lt 7 retval random_counter 1 7 A PUB NES_Read_Gamepad nes_bits T 7P T NES Game Paddle Read LPEE LEE EECA TIAL EL VETTE A TET TILAPIA TAAL AT ATLA EEA EPL ATL EEL LILIE reads both gamepads in parallel encodes 8 bits for each in format right game pad 1 15 8 left game pad 0 7 0 1 set I O ports to proper direction 91 P3 JOY CLR 4 JOY_SH LDn 5 JOY_DATAOUTO 6 P6 JOY_DATAOUTI 7 ty td Ow oll NES Bit Encoding L RIGHT 00000001 LEFT 00000010 DOWN 00000100 UP 00001000 START 00010000 SELECT 00100000 B 01000000 A 10000000 step 1 set I Os DIRA 3 1 output DIRA 4 1 output DIRA 5 0 input DIRA 6 0 input step 2 set clock and latch to 0 OUTA 3 0 JOY_CLK 0 OUTA 4 0 JOY_SH LDn 0 Delay 1 step 3 set latch to 1 OUTA 4 1 JOY_SH LDn 1 Delay 1 step 4 set latch to 0 OUTA 4 0 JOY_SH LDn 0 step 5
52. e 3 colors repeat i from 0 to 64 colors i COLOR_3 COLOR_2 COLOR_1 COLOR 0 init tile screen repeat dx from 0 to tv_hc 1 repeat dy from 0 to tv_vc 1 screen dy tv_hc dx onscreen_buffer gt gt 6 dy dx tv_ve dy amp S3F lt lt 10 reset game state game_state GAME _ STATE_INIT start and setup graphics gr start gr setup 12 12 96 96 offscreen_buffer BEGIN GAME LOOP TILTLILISSITSSLSSSS SSSI TITS TITS TITS TITS TITS TITS TITS TITS repeat MASTER GAME STATE MACHINE Cae Cede see ee se eeeeee lea Tee hese see cee eooreeeea GAME STATE_INIT this state initializes all GAME related vas case game_stat initialize player s ship lander_state OBJECT_STATE_ ALIVE lander_x 20 lt lt 16 lander_y 60 lt lt 16 lander_dx 0 lander_dy 0 lander_angle ANG_90 83 Salazar lander_fuel 999 num_landers 3 seed random counter random_counter 17 initialize game state counters game_counterl 0 game_counter2 0 set initial state to menu game_state GAME _STATE_MENU GAME_STATE_START the game is ready to start do any housekeeping and run re initialize player s ship lander_state OBJECT_STATE_ ALIVE lander_x
53. e Development Kit can be bought by 199 95 at www xgamestation com Nintendo NES P Mini Keyboard Compatible Game Controller Figure 1 1 HYDRA Game Development Kit 1 1 HYDRA Game Development Kit Description The HYDRA Game Development Kit shown in figure 1 1 comes with everything that is needed in order to start developing games It includes 1 Hydra Game Console HGC 2 PS 2 Mouse 3 PS 2 Keyboard Salazar 128 KB Game Cartridge Blank Experimenter Card Mini USB cable 9V power cord RCA A V cable S 200 Sh Oe eh R Nintendo compatible controller 10 CD ROM Next a brief description of each part included in the HYDRA Game Development Kit is given Hydra Game Console HGC This is the main component of the kit It is basically an electrical board along with the propeller chip This is where the games run See Figure 1 2 PS 2 Mouse and PS 2 Keyboard These two parts are basically a regular mouse and keyboard They can be used to give input to the Hydra Game system 128 KB Game Cartridge and Blank Experimenter Card The game cartridge or game card can be placed in the expansion port of the Hydra console The game card can be preloaded with games Initially it is preloaded with a game called Ball Buster Thus when the game card is inserted and the console is turned on the Hydra will boot from the game card rather than the on board serial EEPROM If nothing is present in the game card then the proces
54. e Hydra console 20 Salazar Since a TV monitor is not available in the lab an attempt was made using several methods to display the output of the Hydra console on various Pc monitors For this reason a RCA to VGA converter was purchased Unfortunately this did not work However the Hydra console was connected to several TV s after successfully uploading Mars Landers As a future extension more games can be added to the HydraNet system in a similar way Several attempts were made to make the newly added games playable online However this was impossible due to the high complexity of the drivers that would be required to send the graphics generated in the Hydra console back to the server For instance most of these games use set of drivers to send the generated graphics to the regular RCA video output These drivers are written in the native assembly language of the Propeller chip and each of them is several thousands of lines of code Although the newly added games are not available to play online they can be locally played on the Hydra console using the NES compatible controller One final aspect that is worth mentioning is that the complete source code including all the previous reports have been reorganized along with the new additions of this project and placed in the C samarks directory on the 69 88 163 18 server Data Analysis Data analysis is an important aspect of this project because data is flowing all over th
55. e need of any user logging in Now the following are the set of steps to set up the Hydra console and start uploading other games as well as playing To do this apply the following procedure 1 Connect the Hydra console to the host PC through the USB cable 2 Inthe host PC go to C Inetpub wwwroot smarks 24 Salazar 3 Double click on HydraServer exe Now the Hydra server should be running and listening for connections A screenshot is presented in Figure A 1 ervyer l 4 Welcome to the HydraNet 3 Server Connecting to the HYDRA Could not connect to HYDRA Try again y n y The server is connected to the HYDRA Server is running Type help for a list of commands Figure A 1 HydraNet server running 4 The user can type help and the hit enter on the command window and some available commands will be displayed as shown in Figure A 2 eX HydraNet 3 Serve 3 Welcome to the HydraNet 3 Server Connecting to the HYDRA Could not connect to HYDRA Try again y n y The server is connected to the HYDRA Server is running help for a list of commands Description lists which players are currently connected provides a list of commands for using the server shuts down connections and closes the server software 25 Salazar Figure A 2 HydraNet server help command 5 The user can then type players and hit enter to see a list of all currently connected players as sho
56. e place in the Hydra System For instance consider a game developer uploading a game In this situation the game developer has to upload a few files including the source code of the spin program First the data flows from the end user through a network which then arrives at the server Then the server takes over and uploads the data directly into the Hydra console Thus it is important to make sure that the data flowing at any particular time during the operation of the Hydra system is consistent To address this issue the Hydra system uses a variety of methods One particular and important method is that when a game developer is going to upload any game into the Hydra console the Hydra system checks the validity of these files by checking that they are in the right format For example the system checks that the source code of the game is spin If the format of the files does not coincide with the specifications and requirements then loading such files will not 21 Salazar be successful Notice that in this manner we can prevent to a certain degree malicious files such as worms and viruses being uploaded to the server and consequently to the hydra console Another particular method used by the Hydra system is that any game to be uploaded has to be ina compiled format In other words besides uploading the source code of a game it is also required to upload an object format of the game This is actually the file that will be uploade
57. ecreate the graphics directory Directory CreateDirectory graphicsFolder unzip the graphics file using ZipFile zip ZipFile Read graphicsFile foreach ZipEntry zipEntry in zip unzip each file in the zip file to the graphics folder overwriting when necessary zipEntry Extract graphicsFolder catch Exception uploadStatus ERROR could not extract and save zipped images return false 61 upload was successful return true displays the status of the upload void uploadStatus string message lblUploadStatus Text message if message lblUploadStatus Visible false else lblUploadStatus Visible true verifies that the file extension is correct bool checkFileExt string fileName string extension int dot fileName LastIndexOf 1 return fileName Substring dot ToLower extension ToLower Salazar 62 Salazar Appendix H Game Manual Web Site C lt Page Language C AutoEventWireup true CodeFile Manual aspx cs Inherits Manual gt lt DOCTYPE html PUBLIC W3C DTD XHTML 1 0 Transitional EN http www w3 org TR xhtml1 DTD xhtmll1 transitional dtd gt lt html xmlns http www w3 org 1999 xhtml gt lt head runat server gt lt title gt HydraNet 3 Game Manual lt title gt lt style type text css gt CSS code obtained from http users
58. else newlmage IMG_P3R change the player s image to face right changePlayerImage player newlImage PUB setTurbo player enable newlImag do not update turbo if request would put turbo out of bounds if enable 1 amp playerTurbo player TURBO_SIZE enable 0 amp playerTurbo player 73 Salazar return T set the turbo will set 0 or TURBO_SIZE depending on enable equaling 0 or 1 playerTurbo player enable TURBO_SIZI Gl enable determine the player s correct turbo image newImage playerImage player 2 else determine the player s correct regular image newIlmage playerImage player 2 change the player s image changePlayerImage player newlImage PUB changePlayerImage player newImage x y save the x y position of the player x getGraphicsObjxX playerImage player y getGraphicsObjY playerImage player remove the current player s image setGraphicsObjVisible playerImage player 0 enable the player s new image at x y setGraphicsObj newImage 1 x y change player s stored image value playeriImage player newImag End section of code for developers PEE EE T TATA ATTA ATA TTA AAA AAT AAT TTA AAT ATTA TATA ATA TAT AA TTT PUB startGame start the USB connection usb start 31 30 0 9600 receive pin transmit pin mode baud rate start a new c
59. et1 Data Flow Diagram In this architecture each Hydra console is connected to an output screen However each of the consoles is also connected to a PC which is in a network or the Internet Thus the PC are able to communicate with each other and exchange information with the respective consoles The flowchart of this architecture is depicted in Figure 1 5 it merely describes the network layer organization of the system Each Hydra console assume the role of a sending and receiving clients simultaneously In fact Salazar this is more similar to a peer to peer architecture However in code this is implemented as a client server architecture A screenshot of the game is shown in Figure1 6 Application Game HYDRA Application Game HYDRA Vv Vv Transmitter USB Driver HYDRA Transmitter USB Driver HYDRA y y Transport Layer Software PC _ Transport Layer Software PC Figure 1 5 Flowchart of HydraNet1 System Figure 1 6 Game ScreenShot 1 3 2 HydraNet 2 This is the second HYDRA project developed again by Scott Marks and Rick Haberkamp The purpose of this project was to extend the HydraNet 2 to allow multiplayer capabilities HydraNet 2 also incorporates a server client architecture Each player or client would connect to a server over the internet 1 Salazar A sample screenshot of the server and client running in
60. first block of memory is Random Access Memory RAM and the second block is Read Only Memory ROM The ROM contains an interpreter certain data tables and other objects needed for the proper operation of the Propeller chip The RAM is used to load the user programs from the PC 128 KB EEPROM EEPROM stands for Electrically Erasable Programmable Read Only Memory Usually these chips store small amounts of information in a non volatile way That is if the power is no longer supplied to the unit the information or data is still saved in the unit However this technology provides the advantage of being erasable and programmable Thus the data on such units could be updated as many times as needed similar to a RW CD Nintendo NES Compatible Game Ports The Hydra console provides two Nintendo NES Compatible Game Ports The controls connected to these ports send the input data to the game to be processed by the game console The data received from the game controllers are parallel The Hydra console also provides an LED that indicates whether or not the game controller is plugged into the system A typical NES compatible control is shown in Figure 1 4 f0 0 Figure 1 4 NES Game Controller Salazar Mini USB Programming Port This port is the one that allows a connection between a PC and the Hydra console A Mini USB cable is provided in the Game Development Kit to realize this connection Inconveniently this cable is only about a fo
61. for int i 0 i lt MAX PLAYERS i if players i null amp amp players i active try players i conn GetStream WriteByte message catch Exception do nothing 32 Salazar sends a byte message to the HYDRA MethodImpl MethodImplOptions Synchronized void sendToHydra byte message try hydra Write message 0 1 catch Exception do nothing void developerUpload Console WriteLine Console WriteLine Developer uploading new game get the developer connection stream Stream connStrm devConn GetStream recieve notification that developer is starting to upload if connStrm ReadByte 1 Console WriteLine Connection with developer failed return shut down the player threads and tell players that a new game is being uploaded for int i 0 i lt MAX PLAYERS i if players i active players i thread Abort players i thread null players i conn GetStream WriteByte DEV_UPLOADING shut down HYDRA thread and serial connection hydraThread Suspend hydra Close send notification that other connections are stopped connStrm WriteByte 2 recieve notification that developer has finished saving uploaded files if connStrm ReadByte 3 Console WriteLine Connection with developer failed return 33
62. g Console Title HydraNet 3 Server Console WriteLine Welcome to the HydraNet 3 Server connect to the HYDRA connectToHydra start the server gets the computer s IP address and the port number is 5309 server new TcpListener IPAddress Any 5309 server Start Console WriteLine Server is running n create the player objects for int i 0 i lt MAX_PLAYERS i players i new Player players i playerNumber i start the command console in a new thread consoleThread new Thread commandConsole consoleThread Start 1 start HYDRA communications in a new thread hydraThread new Thread hydraToPlayers hydraThread Start variables to accept new clients TepClient conn Stream connStrm while true accept a connection conn server AcceptTcpClient connStrm conn GetStream try int clientType connStrm ReadByte j if clientType 1 amp amp numPlayers lt MAX_PLAYERS server was not full accept connection connStrm WriteByte 1 29 Salazar send client the number of images it needs to download connStrm WriteByte byte getNumGraphics receive all clear from client that downloading is complete if connStrm ReadByte 1 for int i 0 i lt MAX PLAYERS i if players i active setup player players i conn conn p
63. ground Each player had control over one sprite lt p gt lt p gt View th ntire lt a href docs HydraNet1lReport doc gt HydraNet 1 project report lt a gt entitled amp quot Programming an Internet Interface for the HYDRA Game Development Kit amp quot lt p gt 42 Salazar lt p gt amp nbsp lt p gt lt div gt lt form gt lt body gt lt html gt 43 Salazar Appendix D Player Web Site ASP NET lt Page Language C AutoEventWireup true CodeFile Player aspx cs Inherits Player gt lt DOCTYPE html PUBLIC W3C DTD XHTML 1 0 Transitional EN http www w3 org TR xhtml1 DTD xhtmll transitional dtd gt lt html xmlns http www w3 org 1999 xhtml gt lt head id Head1l runat server gt lt title gt HydraNet 3 Player lt title gt lt head gt lt body gt lt form id forml runat server gt lt div gt lt hl gt HydraNet 3 Player lt h1 gt lt p gt Welcome to the HydraNet 3 Player This page allows you to play the currently uploaded game on the HYDRA lt p gt lt p gt Go back to the lt a href Default aspx gt main page lt a gt or develop a new game on the lt a href Developer aspx gt Developer page lt a gt lt p gt lt p gt There is no need to worry about connecting and disconnecting If you are seeing this page and there was an open player slot on the server then you are already connected to the game To disco
64. he website shown in Figure 2 2 Then click anywhere inside the Java Applet and the game will start The game controls to move the players are as follows e A Move Left e D Move Right e W Move Up e S Move Down e J Action Turbo With these controls each user can move their own player and have interaction with other currently connected players 13 Salazar HydraNet 3 Gaming Syster eC fF CNI 4104 Computer Netw pb N CET 69 88 163 18 samarks Default aspx ANGEL FGCU EagleMail Hotmail MyPage ZZ Dropbox Java API Y Suncoast e EEG HydraNet 3 Gaming System CEN 4935 Senior Software Engineering Project Spring 2009 By Scott Marks The purpose of this project is to expand and improve HydraNet 2 in two ways the addition of game graph HydraNet system without a significant reduction in performance The web interface with the game embedc View the entire HydraNet 3 project report entitled HYDRA Network Control and Graphics HydraNet 3 Player The Player page can be used to play the current game View the game manual opens in new window tab The game controls are A Left D Right W Up S Down J Action HydraNet 3 Developer Figure 2 1 Hydra Main Web Site 14 Salazar HydraNet 3 Player ANGEL FGCU EagleMail Hotmail MyPage ZZ Dropbox Java API Y Sunco HydraNet 3 Player Welcome to the HydraNet 3 Player This page allows you to play the currently uploaded ga Go back to the main
65. icsObjVisible playerImage player 0 elseif input INPUT_FIRE toggle the turbo if playerTurbo player setTurbo player 1 else setTurbo player 0 71 Salazar elseif input INPUT_UP move player up pos getGraphicsObjY playerImage player 2 playerTurbo player lt getScreenSizeyY 1l setGraphicsObjY playerImage player pos checkDoor getGraphicsObjX playerImage player pos elseif input INPUT_DOWN move player down pos getGraphicsObjY playerImage player 2 playerTurbo player gt 0 setGraphicsObjY playerImage player pos checkDoor getGraphicsObjX playerImage player pos elseif input INPUT_LEFT move player left pos getGraphicsOb xX playerImage player 2 tplayerTurbo player gt 0 setGraphicsObjxX playerImage player pos setLeft player checkDoor pos getGraphicsObjY playerImage player elseif input INPUT_RIGHT move player right pos getGraphicsOb jxX playerImage player 2 playerTurbo player lt getScreenSizex l setGraphicsObjxX playerImage player pos setRight player checkDoor pos getGraphicsObjY playerImage player End section of code for developers 111111111 111 11 11111111111111111111111111111111111111111 1 1111111 ALILIA EET VALLAL AI ALAIA IAIA ILAI TATA TTT TTT AIAI LILI d Start section of code for devel
66. ight fire max number of players allowed i ART T AE AT TE A EA ALT PA ALT T Start section of code for developers constant variables backgroun IMG_BG1 0 IMG_BG2 1 player 0 MG POL MG_POR MG_POLT MG_PORT HHHH Ln E w player 1 IMG_P1L IMG_P1R IMG_P1ILT IMG 7 PIRT player 2 IMG_P2L d images images images LO CoO N images 10 69 Salazar IMG_P2R 11 IMG _P2LT 12 IMG_P2RT 13 player 3 images IMG_P3L 14 IMG_P3R 15 IMG_P3LT 16 IMG_P3RT 17 door area DOOR_X_MIN 195 DOOR_X_MAX 225 DOOR_Y_MIN 55 DOOR_Y_MAX 95 number of extra pixels to move when turbo is on TURBO_SIZE 2 End section of code for developers TITTTTTTTTTTTTTT TATA VAR number of graphics objects within game byte graphicsSize byte graphicsVisible GRAPHICS_MAX byte graphicsX GRAPHICS_MAX byte graphicsY GRAPHICS_MAX byte containing bit flags for each active player byte pStatus stack for receiving player inputs long receiveInputStack 100 stack for sending graphics long sendGraphicsStack 100 111111111 1 1 1 1 11 11111111111 1 1111111111111111111111111111 1 1 1111111 Start section of code for developers variables turbo toggle for player movement byte playerTurbo PLAYER_MAX stores current player image for each player byte playerImage PLAYER_MAX
67. ion the window PropForm displays public Hydra InitializeComponent this Activate this Show nsafe void DownloadToPropeller string Filename CallingConvention Cdecl nsafe void SetResetSignal byte Value CharSet Ansi CallingConvention Cdecl byte CharSet CharSet Ansi CallingConvention Cdecl n unsafe void FinalizePropellent 38 Salazar initializes the Propellent DLL file on startup private void HydraPropForm_Load object sender EventArgs e try initializes Propellent dll InitPropellent this Handle false IntPtr Zero catch Exception the Propellent dll file does not exist so show error message and exit MessageBox Show The Propellent dll file was not found Error MessageBoxButtons OK MessageBoxIcon Error System Environment Exit 1 finalizes the Propellent DLL file on shut down private void HydraPropForm_FormClosing object sender FormClosingEventArgs e FinalizePropellent gets the COM port that the HYDRA is connected to or 1 if it is not found public static int getHydraComPort create and display the window HydraPropForm hpf new HydraPropForm auto scan for port number uint ver HydraPropForm GetPropellerVersion j close the window hpf Close if ver 0 vwer 0 when HYDRA was not found return l1 else
68. layers i active true start player thread players i thread new Thread playerToHydra players i thread Start players i end search for vacant player slot break else if clientType 0 save the connection devConn conn handle the developer s uploaded files developerUpload else server is full deny connection connStrm WriteByte 0 connStrm Close conn Close catch Exception Console WriteLine Error connecting client break region Client communications handles communication with player clients void playerToHydra object p r numPlayers increment the number of connected players 30 Salazar Player player Player p get TcpClient object from parameter TcepClient client player conn Console WriteLine Player player playerNumber 1 connected get stream from player client Stream connIn client GetStream send message to all active players that a new player has joined broadcastToPlayers byte PLAYERO_CONNECT player playerNumber byte outByte new byte 1 byte inByte byte to read player inputs from client pNum byte player playerNumber save player number as byte while true try if the stream is closed stop reading from client if inByte byte connIn ReadByte lt 0 inByte gt 255
69. lications since the main purpose of this project was to achieve a communication between the two Hydra consoles It consisted of two sprites that moved around the screen each controlled by one player The purpose of the game or player is to obtain control over the enemy namely the other player 1 Salazar This project runs multiple threads at the same time The game itself is a multithreaded program which utilizes the Propeller s multiple cores Moreover several communication threads were implemented on each Hydra console one for receiving and another for sending game state information from and to the other Hydra console As for the network interface of the system which runs on the PC four threads were required one for reading the serial port one sending to the serial port one for reading incoming game state information and finally another for sending game state information The setup for this multiplayer system is shown in Figure 1 4 The flow of data in this system is clearly depicted A Hydra console sends its game video output to a TV It also sends and receives game state information by communicating with the host PC Also each host PC sends and receives each other s game state information through the network Television HYDRA Game System Computer Bo NES Controller f ar lt Tee ar fole NES Controller Network Hub Internet y Television HYDRA Game System Computer Figure 1 4 HydraN
70. m easily MOUNTAIN SCAPE delta Y positions for cheesy mountains Notice the Dn S make the landing zone mountain_scape long 0 10 3 7 10 2 15 20 10 40 0 0 15 T0635 307 O Dy 667 lU landing zone data structure in format xl x2 y shows up as green on top of mars surface dirt landing_zone long 10 8 12 8 30 95
71. nnect simply navigate away from this page or close the browser window To attempt to reconnect or to start over click the browser amp 39 s refresh button lt p gt lt p gt View the lt a href Manual aspx target _blank gt game manual lt a gt opens in new window tab lt p gt The game controls are lt p gt lt 1li gt A Left lt li gt lt li gt D Right lt li gt lt li gt W Up lt li gt lt lt gt 1i gt S Down lt li gt li gt d Action lt li gt lt i gt To play you must first click within the screen area lt i gt lt p gt lt p style border solid 1px black width 240px gt lt applet code HydraPlayer class width 240px height 180px gt lt PARAM NAME cache_option VALUE lt PARAM NAME cache_archive VALUE gt 44 Salazar lt applet gt lt p gt lt p gt If a developer uploads a new game while you are playing simply wait until you receive a message stating that the new game is running Then refresh this web page to start the new game lt p gt lt p gt amp nbsp lt p gt lt div gt lt form gt lt body gt lt html gt 45 im im im im im im pu Salazar Appendix E Player Client Applet Source Code Java port java awt port java awt event port java io port java net Socket port java net UnknownHostException port javax swing blic class HydraPlayer extends JApplet
72. og to read all player inputs cognew receivelInput receivelInputStack start a new cog to send game state to players cognew sendGraphics sendGraphicsStack PUB receivelInput rec player input repeat receive the byte containing player number and input rec usb rxtime 5 get player number last 4 bits player rec amp 0000_1111 get input code first 4 bits input rec amp 1111_0000 74 Salazar update the player s position update player input PUB sendGraphics id tempID U U U send info on active graphics objects send id x y of each active graphics object repeat if pStatus gt 0 only send if players are connected repeat id from 0 to graphicsSize 1 if getGraphicsObjVisible id tempID id 1000_0000 indicates that the object is visible else tempID id send graphics ID number and visibility usb tx tempID object s x coordinate usb tx graphicsX id object s y coordinate usb tx graphicsY id send end byte indicating that the next byte will belong to the next object usb tx 1111_1111 B getGraphicsSize return graphicsSize B setGraphicsSize size graphicsSize size B setGraphicsObj id visible x y setGraphicsObjVisible id visible setGraphicsObjX id x setGraphicsObjY id y B getGraphicsObjVisible id return graphicsVisible id B setGraphicsObjVisible id visible graphicsVisible id visi
73. ol software With the game source visible in the software follow these steps lt p gt lt ol gt lt li gt Click the amp quot View Info amp quot option in the amp quot Run amp quot amp gt amp quot Compile Current quot menu or press F8 lt 1li gt lt li gt Click the amp quot Show Hex quot button lt 1li gt lt li gt Click the amp quot Save EEPROM File amp quot button lt li gt lt lt li gt Pick a file name and location lt li gt li gt Save the file lt li gt Game manual lt h3 gt This manual is meant to teach other players how to play your game There are no limitations to the game manual other than it must be written as a text file with the txt extension No HTML coding is required for text and paragraph spacing however HTML tags for bold italics etc can be used lt p gt lt p gt amp nbsp lt p gt lt div gt lt form gt lt body gt lt html gt 58 Ce GG See Ghat GP SS SG eG Cea G si si si si si si si si si si si si si Ng Ng Ng Ng ng ng ng ng ng ng ng ng ng System System System System System System System System System System System System Tonic Salazar Appendix G Developer Client Source Code C Collections Configuration Data IO Net Web Web Web Web Web Web Zip Sockets U Security Wile UL HtmlControls UlL We
74. opers developer defined methods PUB checkDoor x y i if x gt DOOR_X_MIN and x lt DOOR_X_MAX and y gt DOOR_Y_MIN and y lt DOOR_Y_MAX toggle background 2 if getGraphicsObjVisible IMG_BG2 setGraphicsObjVisible IMG_BG2 1 else setGraphicsObjVisible IMG_BG2 0 set all players to center of screen and face them left repeat i from 0 to PLAYER_MAX 1 if getPlayerStatus 1 setGraphicsObj playerImage i 1 getScreenCenterxX getScreenCenterY setLeft i PUB setLeft player turbo newlImage save the turbo status of the player turbo playerTurbo player 2 determine the correct new image 72 Salazar if player if turbo newlmage IMG_POLT else newIlmage IMG_POL elseif player 1 if turbo newImage IMG_P1LT else newImage IMG_P1L elseif player 2 f turbo newImage IMG_P2LT else newlmage IMG_P2L elseif player 3 if turbo newlmage IMG_P3LT else newIlmage IMG_P3L change the player s image to face left changePlayerImage player newlImage PUB setRight player turbo newImage save the turbo status of the player turbo playerTurbo player 2 determine the correct new image if player if turbo newImage IMG_PORT else newImage IMG_POR elseif player 1 f turbo newIlmage IMG_P1RT else newImage IMG_P1R elseif player 2 if turbo newlmage IMG_P2RT else newlmage IMG_P2R elseif player 3 if turbo newIlmage IMG_P3RT
75. ot long However this type of cable is common and if needed one can find longer Mini USB cables at local stores 1 3 HydraNet Overview Having described the HYDRA Game Developer Kit we next present an overview of the previous projects on the Hydra system There are in existence three previous HYDRA projects Thus before a description of the current project is given a brief explanation of the accomplishments of the previous projects is summarized next At this point and due to the numerous extensions already made on the HydraNet project it is difficult to have a concrete problem definition Nevertheless some ideas as presented next but before we overview the previous projects HydraNet 1 HydraNet 2 and HydraNet 3 HydraNet 1 is the first project using the HYDRA console HydraNet 2 is extension of HydraNet 1 Finally HydraNet 3 is yet another extension of HydraNet 2 1 3 1 HydraNet 1 This is the first project on the HYDRA Game Development Kit developed by Scott Marks and Rick Haberkamp 2 The goal of HydraNet 1 was to develop a game for two players Each player would play on its own HYDRA console and the communication between the HYDRA consoles would be implemented through a network or the Internet HydraNet1 consisted on two main components The Hydra game and the computer program realizing the network interface through which the Hydra consoles would communicate The game was very simple in nature This allowed avoiding comp
76. passed the total number of graphics object within the game After calling this method any initial graphics visibility or positioning should be handled lt 1li gt lt li gt lt span class stylel gt Update method lt span gt This section of code is where the game occurs Each time a player sends a game key press this update method will be called to take the appropriate actions for the game to progress lt li gt lt li gt lt span class stylel gt Other methods lt span gt This section is simply a placeholder for any additional methods you wish to include lt li gt lt ul gt lt p gt Of course the game requires much more code to operate but these are the only sections that are needed for developing a new game While the other cod can be revised deleted or added to it is strongly discouraged since most of this code allows the HYDRA to communicate properly with the server and player components of the HydraNet 3 system lt p gt lt p gt Please note that while the server and player applications show that the players 57 Salazar are numbered 1 4 they are actually numbered 0 3 within the HYDRA game template For example Player 1 on the server and player client corresponds with Player 0 in the game code lt p gt lt h3 gt Compile the game sources lt h3 gt lt p gt Before uploading your game to the HydraNet 3 system you need to compile the game into an EEPROM file using the Propeller To
77. s LLC 4 Propellent Library Propellent Library and Executable 2008 Parallax Inc 8 Oct 2008 lt http www parallax com tabid 442 Default aspx gt 5 XGameStation Pico Edition Kit 2 0 XGameStation Video Game System Development 2008 Nurve Networks LLC 13 Oct 2008 lt http www xgamestation com view_product php id 34 gt 6 Fan J Hydra Network Control and Graphics April 30 2010 Florida Gulf Coast University 23 Salazar Appendix A User Manual First we describe the steps to set up the server so that the Hydra server runs at system startup In this manner there does not have to be a user logged in order to run the Hydra server Rather the computer does this in the background These steps are described next 1 Open notepad and write the following line C Inetpub wwwroot smarks HydraServer exe 2 Save this file as a bat file 3 Place this file on the following directory C Windows System32 GroupPolicy Machine Scripts Startup 4 Click on start gt run and type in gpedit msc 5 On the window that opens up Go to Windows Settings 6 Double click on Scripts Startup Shutdown 7 Double click on Startup 8 Click on Add 9 Click on Browse 10 Now go to the directory where you have previously saved the bat file and select it 11 Click on open and click ok two consecutive times Now every time the server is turned on the HydraServer exe is executed on the background without th
78. sor boots up from its main memory The blank experimenter card allows to expand the functionality of the Hydra console and works in a similar manner Mini USB cable This cable is used to connect the Hydra console to a computer 9V power cord This cable is used to connect the Hydra console to a power outlet RCA A V cable This cable is used to connect the Hydra console to a compatible TV Nintendo compatible controller These controllers are basically the same as the old NES controllers They provide the player with a device to set input to the Hydra system CD ROM This CD contains some developing tools such as the Propeller Tool used to develop programs for the Propeller chip Having discussed the HYDRA kit package contents we proceed to briefly explain the HYDRA hardware Salazar 3 3 5 0V Supplies VGA Port RCA Video Connector Composite NTSC PAL Compatible Fa 128K EEPROM RCA Audio Connector Z RJ 11 Networking Port Propeller Full Duplex 1 5Mbit Chip USB2SER Network Noise Compatible Filter Programming Port oN Game Cartridge Port Mini USB Programming Port PS 2 Keyboard Port PS 2 Mouse Port Nintendo NES Compatible Game Port Cog 4 Cog 5 Cog 6 Cog7 I Pin Directions D D I I D D D D I D D l Pin Outputs 27182 TD TD CAD CPi C23 OS L D 1 EE CPZ K m 5 5 PHE
79. st draw thruster if lander_fuel gt 0 and nes_buttons K NES_B and Rand K 01 gr colorwidth 2 0 gr plot lander_wp_x lander_wp_y gr line lander_wp_x last_cos gt 8 lander_wp_y last_sin gt 8 now ship gr colorwidth 3 0 88 gr vec lander_wp_x lander_model 1 lander_wp_y draw players ships left 0020 Salazar lander_angle gr colorwidth 3 0 repeat i from 0 to num_landers 1l gr vec LANDERS_X_POS i lt lt 3 4 LANDERS_Y_POS 4 0012 2000 gt gt 2 lander_model test if state changed to GAME_STATE_CRASHED if game_state GAME_STATE_CRASHED print out crash gr textmode 3 1 6 5 gr colorwidth 2 0 used up a player if num_landers 1 gr text 4 0 over_string game_state GAME_STATE_OVER else num_landers gr text 4 0 crash_string check if landed if game_state GAME_STATE_LANDED print out crash gr textmode 3 1 6 5 gr colorwidth 2 0 gr text 4 0 landed_string copy bitmap to display we have to do this here to make sure to see the last text rendered into the buffer gr copy onscreen_buffer if game_state GAME_STATE_CRASHED stall the event loop normally you wouldn t want to do this but in this case its ok since we are trying to keep
80. t lt dl gt lt p gt During the install you will be given an option to also install a virtual COM port 54 Salazar driver for use with the HYDRA console This driver isn amp 39 t necessary unless you have access to a HYDRA console lt p gt lt p gt The Propeller Manual can also be downloaded directly from that page but it is normally included with the Propeller Tool software under the amp quot Help amp quot menu lt p gt lt h3 gt Propeller amp 39 s Spin language lt h3 gt lt p gt Games for the HYDRA or more specifically Parallax amp 39 s Propeller microcontroller can be written in Spin Propeller Assembly or both Spin is an object oriented language Similar to C with some unique characteristics Tool software download includes a manual for programming the Propeller be accessed from the Propeller Tool via the amp quot Help amp quot menu or directly from Parallax amp 39 s Propeller download page see link above lt p gt lt h3 gt Source code template and two example games lt h3 gt lt p gt Two source files are required to operate a game on the HydraNet 3 system lt p gt The Propeller This manual can lt ul gt lt li gt lt a href game_examples game template spin gt Game source template lt a gt lt li gt lt li gt lt a href game_examples FullDuplexSerial spin gt HYDRA USB driver lt a gt Parallax
81. t pixel_value 1 7 color I II PUB Plot_Pixel2 x y video_buffer video_offset pixel_value plot pixel calculation using LONG aligned 12x12 tiles video_offset read pixel group pixel _value ma ue pixel OR _val sk AND out target bi ec rrom memory long ts ue K pixel_val color with pixel value _value pixel pixel_value write pixel back to memory video_buffer gt gt 2 so col 11 col x gt gt 0 video_offset or mixing lt lt x amp or lt lt x amp calcs 4 1 192x192 bitmap 92 y doesn t occur 1111 2111 fo 1 lt lt 1 lt lt 1 90 Salazar long 0 video_offset pixel_value 1 AEP ATLET L EEE EEE E TALL 7P PUB Get_Pixel2 x y video_buffer video_offset pixel_value get pixel calculation using LONG aligned calcs 192x192 bitmap 12x12 tiles video_offset video_buffer gt gt 2 x gt gt 4 192 y read pixel group from memory 16 pixels 32 bits pixel_value long 0 video_offset mask AND out target bits to extract bits in question pixel_value pixel_value amp 11 lt lt x amp 1111 lt lt 1 now shift bits back to right and return pixel value from screen pixel_value pixel_valu
82. t lt h3 gt HydraNet 2 lt h3 gt lt h4 gt CNT 4104 Computer Network Programming Fall 2008 lt br gt By Scott Marks and Richard Haberkamp lt h4 gt lt p gt The purpose of this project was to develop a multiplayer network game using a Single HYDRA The players would connect to a PC server via player software on their computer The players would send game inputs via the keyboard and the game screen would be displayed in the player software The game followed the same format from HydraNet 1 but with two minor differences First the player sprites were simply numbers 1 4 indicating each player amp 39 s number instead of ghost like figures Second the maximum number of concurrent players was increased from two to four lt p gt lt p gt View th ntire lt a href docs HydraNet2Report doc gt HydraNet 2 project report lt a gt entitled amp quot HYDRA Network Control and Visualization amp quot lt p gt lt h3 gt HydraNet 1 lt h3 gt lt h4 gt CEN 3213 Embedded Systems Programming Spring 2008 lt br gt By Scott Marks and Richard Haberkamp lt h4 gt lt p gt The purpose of this project was to develop a two player HYDRA game that could be played using two HYDRAsS connected over a network or the Internet A computer program which would act as either the server or client handled the relaying of game state between HYDRAs The game was very basic and included two sprites that moved around a black back
83. t to run in the Hydra console The games would have to be modified in such a way that the input always comes from the client players computers which are of course in remote locations Moreover the output of the Hydra console would have to be redirected at each client s computer through the Java applet Since for each game we need four files the respective links are added to the main web site as shown in Figure 3 1 The first file is the compiled executable file with the eeprom extension The second file is the source code in txt format The third file is just a dummy zip file Finally the fourth file is a user manual in a txt extension 16 Salazar Example 1 shows how to get 4 players to move about a static background 9 C ame o Source code Images zipped o Manual Example 2 shows how to get 4 players to move between two backgrounds and how to get the player images to change based on movement and turbo state Compiled game o Source code Images zipped Nanna Example 3 is a sample program that turns ON OFF the debug led in the HYDRA console o Compiled game Source code Images zipped o Manual Example 4 is an classical game o ed e Source code o Images zipped o Manual Figure 3 1 Links to New Games 17 Salazar Section 4 Implementation The HydraNet3 system allows developers to develop and upload games to the Hydra console via its web site Instructions of how to do so can
84. this system is shown in Figure 1 7 As one can see in the picture the server top part displays an IP address and chooses a port number to which it listens for clients trying to connect The server runs in an infinite while loop waiting for players to connect On the other hand in the client side the users inputs the IP address and the port number and hits enter Then the connection is established The architecture of this system is shown in Figure 1 8 As one can see several clients can connect to the server PC to which the Hydra console is connected Thus this server runs as an interface between the players on the network and the Hydra console Also the network layer organization for this system is shown in Figure 1 9 re you a server O gt or a client 1 Enter O or 1 IP Address 192 168 6 1065 hoose port 12345 he server is waiting for the client to connect onnect to Hydra on COM 3 he serial port is open Please start the HYDRA nter a command O C Documents and Settings Jessica Desktop HydraNet HydraNet of x re you a server O or a client 1 Enter or 1 1 onnect to cdi 192 168 080 105 onnect to Hydra on COM he serial port is open Please start the HYDRA nter a command _ Figure 1 7 HydraNet Server top and Client bottom 10 Computer Client Computer Client Salazar Computer Client Network Hub Internet Computer Server Figure 1 8 HydraNet2 Archite
85. uires a zip file when the developer is trying to upload a game into the Hydra console Since the new games do not use pictures as a way of generating graphics the zip dummy files are available for download Example 3 is a sample program that turns ON OFF the debug led in the HYDRA console Compiled game Source code Images zipped o Manual Example 4 is an classical game Compiled game Source code Images zipped Manual Figure 5 1 Respective links to new games For testing purposes a special program was created This program is located under Example 3 The purpose of this program is to turn ON OFF the debug LED in the Hydra console With this program one can test whether or not games can be successfully loaded into the Hydra console For instance if we load this program successfully the debug LED of the Hydra console should immediately start blinking at the frequency set in the source code Loading this program has been done on several occasions and from different computers on different networks This implies that all the games loaded in this manner are successfully uploaded into the Hydra console In any case Example 4 which is a real game in fact it is the classical game Mars Landers have been successfully loaded several times Nevertheless this game does not use pictures to generate game graphics and thus the output is not sent back to the Java applet Rather the output is sent to the regular video output of th
86. wn in the Figure A 3 c HydraNet 3 Server l Connecting to the HYDRA Could not connect to HYDRA Try again y n y The server is connected to the HYDRA Server is running help for a list of commands Description lists which players are currently connected provides a list of commands for using the server shuts down connections and closes the server software players Players connected disconnected disconnected disconnected disconnected Figure A 3 HydraNet server players command 6 Toclose the server just type exit and then hit enter 7 After the server is running and listening to connections go to the following website http 69 88 163 18 samarks Default aspx 8 To play the currently loaded game in the Hydra console click on the player page link which would take you to the following web site http 69 88 163 18 samarks Player aspx 9 Once in this website click inside the Java applet Then the game will start as shown in Figure A 4 26 Salazar View the game manual opens in new window tab The game controls are e A Left s D Right s W Up s S Down e J Action To play you must first click within the screen area Figure A 4 Java applet containing a game 27 GAG G S AG OG Ge IGG si si si si si si si si si si Ng Ng ng ng ng ng ng ng ng ng System System System System System System System System System Salaz
87. y Scott Marks lt h3 gt lt p gt The purpose of this project is to expand and improve HydraNet 2 in two ways the addition of game graphics and a web interface Developers now have the ability to create high color game graphics for the HydraNet system without a significant reduction in performance The web interface with the game embedded as a Java applet allows for a better user experience both to players and developers alike lt p gt lt p gt View th ntire lt a href docs HydraNet3Report doc gt HydraNet 3 project report lt a gt entitled amp quot HYDRA Network Control and Graphics amp quot lt p gt lt h3 gt HydraNet 3 Player lt h3 gt lt p gt The lt a href Player aspx gt Player page lt a gt can be used to play the current game lt p gt lt p gt View the lt a href Manual aspx target _blank gt game manual lt a gt opens in new window tab lt p gt lt p gt The game controls are lt p gt lt ul gt lt li gt A Left lt li gt lt li gt D Right lt li gt lt li gt W Up lt li gt lt lt gt 1i gt S Down lt 1li gt li gt d Action lt li gt 41 Salazar lt h3 gt HydraNet 3 Developer lt h3 gt lt p gt The lt a href Developer aspx gt Developer page lt a gt can be used to create and upload your own games This page also includes a tutorial on how to develop a game lt p gt lt p gt amp nbsp lt p gt lt h2 gt Past projects lt h2 g
88. yMessage Player break case PLAYER2 DISCONNECT displayMessage Player break case PLAYER3_ DISCONNECT displayMessage Player break case DEV_UPLOADING con con con disco disco disco disco nected nec n n n tru nected tru ted tru nected nected nected nected tru tru tru tru displayMessage Game stopped by developer numImages 0 break case DEV_FINISHED fa Salazar lse set number of images to 0 to c Lear game screen displayMessage Refresh the page to start new game false stop disconnect from server break case SERVER_SHUTDOWN displayMessage The server was shut down normally false stop disconnect from server break required for KeyListener but not used lic void keyPressed KeyEvent arg0 lic void keyReleased KeyEvent arg0O L required for KeyListener sends game inputs to HYDRA lic void keyTyped KeyEvent ke try switch Character toUpperCase ke getKeyChar case A connOut write INPUT_LEFT break case D connOut write INPUT_RIGHT break case W connOut write INPUT_UP break casen Sts connOut write INPUT_DOWN break case J 51 Salazar GI lt connOut write INPUT_FIR break default break catch IO
89. ze 5 position the background setGraphicsObj IMG_BACKGROUND 1 getScreenCenterX getScreenCenterY End section of code for developers EEE EEE EEE EEE EE EEE EEE EL EEE EEE LEE EEE start the game startGame PUB update player input playerImg AE ELT A EET T E TAE T A LEI tAd Start section of code for developers update method playerImg getPlayerGraphicObj player if input INPUT_ON set the player as active setPlayerStatus player 1 setGraphicsObj playeriImg 1 getScreenCenterxX getScreenCenterY playerTurbo player 0 elseif input INPUT_OFF set the player as inactive 65 setPlayerStatus setGraphicsObjVisible playerImg f input INPU toggle the turbo playerTurbo p elsei 1 if player else playerl elsel Turbo pl Turbo pl move player setGraphicsObjy ge elseif input INPU 1 move player setGraphicsObjY 2 elseif input INPUT_ le X 2 move player setGraphicsObj elseif input INPUT ri X ge ge move player setGraphicsObj layer layer input INPUT_UP up getGraphicsObjY playeriImg 2 playerTurbo player Salazar player 0 0 D LRE layer 0 2 U playerimg lt tScreenSizeyY L DOWN down playeriImg getGraphicsObjY playeriImg tplayerTurbo player gt 0 LEFT Et playeriImg getGraphicsObjxX playeriImg

S. Salazar, Adding Functionality to the Hydra Game

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