2035 Mbed Project
Contents
1. Two audio files bomb wav and monkey wav are provided on the class website Whenever a tree or branch is hit the bomb wav file should play whenever a monkey is hit the monkey wav files should play You will need to place these files on the microSD card using the adapter that comes in the packaging and a pc Then you will need to modify the BOMB _WAVFILE and MONKEY WAVEFILE define statements in the program file main cpp to match the locations of these wave files on the microSD drive Showing that your program signals correct animations and sounds during the demo is worth one third 15 points of the demo grade 45 points total Part 2C Game Hints The final step of this project is to calculate a hint for what shot the user should take When the game starts and your program receives the world before the game engine starts running your program should first find the location of the leftmost monkey in the game world and calculate a power and angle combination that will destroy that monkey ECE 2035 Project 2 Angry Monkeys v1 0 Fall 2013 You can choose to either a Provide a hint that hits the left most monkey directly Correctly providing this hint is worth 30 out of 45 possible points for hint accuracy Or b Provide a hint that destroys the branch on which the left most monkey sits Your hint should target the branch tile that destroys the entire branch the branch tile that forms the joint between branch2. Windows device manager to find the COM port number of the mbed You should test your connection by printing a message to the console of the front end program In the mbed program files you downloaded in Part 1A you are given a function in main cpp to print to this console This function works just like the C Standard printf function It s prototype is given below void print const char format ECE 2035 Project 2 Angry Monkeys v1 0 Fall 2013 Part 2 Implement Angry Monkeys Now that you have completed the preliminary steps you will develop the game engine and control interface needed to play a game of Angry Monkeys with the mbed The front end will load a game world and send a sparse array representation of the world to the mbed Your program will need to do three things use the pushbuttons to take in user inputs calculate the game physics and collisions based on user inputs and the game state and provide hints for how to hit the monkeys A number of functions that will be needed to send messages to the front end are provided in the mbed shell A list of their usage and functionality can be found in Messaging Functions pdf in the project files Part 2A User inputs The first step is to retrieve user inputs via the pushbuttons to determine a shot trajectory You should use two pushbuttons to move the shot angle up and down one pushbutton to toggle the shot power between high and low and one pushbutton to tr
3. ECE 2035 Project 2 Angry Monkeys v1 0 Fall 2013 Angry Monkeys In the game of Angry Birds the player sling shots some rather surly birds of various sizes shapes and colors at a structure of rocks wood glass and pigs Points are gained by damaging the structure and destroying pigs 39 at Ca aT Pe mam 2200 E a 2am mH H i FE NP pa E i a mi a OCOrRPFNWEUADS WW Figure 1 A typical Angry Monkeys game world The goal of this project is to program the mbed microcontroller to run a much simpler and less copyright infringing game in the genre of Angry Birds that we ll call Angry Monkeys You will start with the embedded design you built in the in class workshop exercise and a software framework that provides all of the necessary tools you need to play the game The game will start with the mbed establishing a connection with the front end python program via serial communication The front end program will draw the game world and send a copy of the world 1 ECE 2035 Project 2 Angry Monkeys v1 0 Fall 2013 to the mbed Then you will develop the game engine and I O interfaces to allow a user to play the game Part 1A Completing Hardware Before beginning this project you must first ensure that your circuit is wired correctly Please complete the workshop exercise and Homework 3 that was given in class on October 21 2013 Once you are sure that your circuit is wired correctly download the project files fr
4. WER cos ANGLE v POWER sin ANGLE Where POWER and ANGLE are determined by user inputs Sine and cosine functions can be found in the lt math h gt standard C library ECE 2035 Project 2 Angry Monkeys v1 0 Fall 2013 IMPORTANT To ensure your x and y values are consistent with the auto grader and compatible with the discrete nature of the game world you should use the floor function from lt math h gt to truncate your x and y values i e use the following equations in your code ylt floor v t SGRAVITY 1 x t floor v t x x 2 ylx floor 2 x SGRA viry Vv 3 Collisions 3A Basic Collisions When you calculate shot trajectories your cannon balls should stop when they hit something i e when they reach a tile occupied by a tree branch or monkey When a tile is hit you should decrement the tile s strength When a tile s strength reaches 0 it should be deleted Showing that your program correctly detects collisions updates tile strength and deletes tiles properly during the demo is worth one third 15 points of the demo grade 45 points total 3B Advanced Collisions To receive more points for the demo grade the effects of destroying a tile should be propagated to nearby tiles in the following ways a Monkeys When a monkey is deleted it does not affect its surroundings only the single monkey should be deleted b Branches When a branch tile is destroyed any branch tiles that were su
5. alled Therefore it will be up to you to control at what times these events occur http mbed org handbook Homepage time and interrupts has links to the built in mbed functions that can be used for timing To send animation updates to the front end program you will need to use the messaging functions found in Messaging Functions pdf To draw the cannonball in flight the updateShot row col delete function can be used to draw a new cannonball at row col the delete parameter determines whether other cannonballs on screen should be deleted before drawing the new ball The delete parameter can be used for debugging but should be set to 1 True in your final submission You should update the cannonball s position at least 4 times as it is flying more updates will make the shot trajectory look better When a shot hits a tile the colorTile row col strength function can be used to update a tile s strength and therefore color and the deleteTile row col function can be used to delete the object at row col Tiles should be updated and deleted according to the collision guidelines in 3 Tiles can be recolored and or deleted all at once when a hit occurs or you can add your own creative timing animations as long as the final state follows the collision rules Finally as a user is selecting shot parameters with the pushbuttons you should send the power and angle changes to the front end using the paaUpdate power angle function
6. and tree Correctly providing this hint is worth 45 out of 45 possible points for hint accuracy Your hints do not need to account for another object being in the way of the target i e as long as the shot you specify would pass through the location that you specify if the world was totally empty it is considered correct The location you specify must also correctly point to the left most monkey or the corresponding branch joint To report a hint to the front end you should call the hint row col power angle function with the proper shot parameters and location Comments on calculating hints As you may realize there are many combinations of power and angle that would send a projectile through a give location To help bound the problem the possible shot power is limited to one of two values and the angle is limited to 0 90 degrees However even with these restrictions there are multiple correct answers Additionally the closed form solution for calculating a hint is rather complex The equation of a shot curve is shown again below Vis 1 A y x GRAVITY v 2 x V x Substituting vx and vy with power and angle terms and using the monkey location for x and y 2 Y monkey Oe ee e bg RAV IT E i POW E R cos 0 R Xmonke y POW E R cos 0 1I GRAVITY 2 POWER As can be seen even for a fixed power and location solving for the required angle involves some rather nasty trigonometry With this in mind you will likel
7. echnique and Style 10 Hint Accuracy 45 Direct monkey hint 30 points Branch joint hint 45 points IP2 2 Angry Monkeys Game Before Tuesday TA Checkoff signup for appointment time 26 November 2013 5 p m Animations and Sounds 15 Basic Collisions 15 Advance Collisions 15 total 100 References 1 MIPS vs ARM summary www ece gatech edu linda 2035 projects html Mbed Pin Input Output Tutorial www ece gatech edu linda 2035 projects html 3 Mbed Pinout http mbed org nxp lpc2368 quick reference B 4 Mbed NXP Pinout http mbed org users synvox notebook Ipc1768 pinout with labelled mbed pins 5 Mbed Handbook http mbed org handbook Homepage 6 NXP LPC1768 User s Manual http Awww nxp com documents user_manual UM10360 pdf
8. igger a shot The angle should be limited to 0 90 degrees and the power should toggle between the high and low values defined by PHIGH and PLOW in the provided mbed shell The angle and power inputs should be printed on the LCD screen attached to the mbed as well as sent to the front end using the paaUpdate power angle function Part 2B Game Engine The next step is to create the game engine that calculates the animations and collision detection for the cannon shots based on user inputs and game world state The guidelines for your game engine are as follows 1 Game World Array An example game world can be seen in Figure 1 The cannonball and shot indicator are not part of the world array The game world is made up of a tree which is comprised of tree and branch tiles and monkeys Each tile has a strength the number of shots it can sustain before it is destroyed The color of each tile strength combination is shown below Type Strength 1 2 3 41 5 Tree Branch Monkey When the game starts the state of the game world is given to you as a sparse array in a format similar to the sparse vectors in Homework 2 The array will be in the following format int world N ECE 2035 Project 2 Angry Monkeys v1 0 Fall 2013 where world 0 Total size of array rows columns world 1 Number of non empty squares world i 4 2 for Row index of i non empty square i 0 1 2 wor
9. ld 1 world i 4 3 for Column index of it non empty i 0 1 2 world 1 square world i 4 4 for Type of object in i non empty i 0 1 2 world 1 square world i 4 5 for Strength of the i non empty square 1 0 1 2 world 1 1 The type field will be an ASCII character code corresponding to M T or B for monkeys tree trunks and branches respectively M T and B are ASCII codes 77 84 and 66 The strength field will be an integer 1 5 It can be assumed that the game world is always square As an example take the sparse array 9 3 1 1 77 3 2 0 66 1 2 2 84 5 This would represent a 3x3 array with 9 total squares 3 of the 9 squares are non empty The first non empty tile is a monkey with strength 3 at row 1 column 1 The second non empty tile is a branch with strength 1 at row 2 column 0 The final non empty tile is a tree with strength 5 at row 2 column 2 2 Shot Physics Shot trajectories should be calculated using the kinematic equations for projectiles Gravity will be defined in the mbed shell as GRAVITY The time based kinematic equations for a projectile initially located at x 0 y 0 are as follows ylt vt SGRAVITY x t v t It may be useful to rearrange these by substituting xit into ylz to give V X 2 x Vy _ Vy 1 x ylxjJ x GRAVITY Vv 2 Additionally and are given by v PO
10. om the class website Place the python files in a directory on your host computer Then import the mbed project files into a new program in your mbed cloud compiler Compile the mbed program files and copy the binary to your mbed Then run the python script on your host pe This will get you familiar with the program structure Part 1B Establish Connection with Front end Program To play the game you will need to establish a connection with the front end python program You can use one of the following methods Serial 1 Make sure the mbed is connected to your pc with the provided USB cord 2 Next you need to find the name of the port address associated with your mbed device Open a terminal and type the following command to list all available serial connections o Linux Is dev ttyACM You may not have permission to access the serial port by default on a Linux install You can set your permissions to allow use of the port with the following command sudo chmod 666 dev ttyACM where is replaced by the port address number you found using the above ls command o Mac Is dev tty usbmodem At the front end s startup screen click the serial button and enter the name of the serial port that you found in step 2 Serial on Windows Windows needs the right serial drivers to detect the mbed as a serial device See http mbed org handbook Windows serial configuration for instructions Once the driver is installed you can look in the
11. pported by that tile and any monkeys sitting on the branch should fall When a branch is deleted you will need to find all branch tiles that are no longer attached to a tree directly or through other branch tiles and delete them You should also find any monkeys that were supported by those branch tiles and delete them as well c Trees When a tree tile is destroyed the tree tiles directly above it should all be destroyed and any branches attached to it should be destroyed according to b Any monkeys supported by the tree and branches deleted in this way should be deleted as well The Collision Examples pdf file included in the project files shows some before and after pictures of collisions that you can use as example cases Showing that your program implements the advanced collision guidelines and properly propagates tile deletion during the demo is worth an additional one third 15 points of the demo grade 45 points total 5 ECE 2035 Project 2 Angry Monkeys v1 0 Fall 2013 4 Animation and Sounds The ultimate function of a game engine is to examine user inputs calculate how those inputs affect the game state and then drive the proper outputs In this case the proper outputs are animations and sounds One important aspect of triggering outputs is timing The front end will update the screen as soon as it receives a message from the mbed Playing a sound on the speaker will also occur as soon as the proper function is c
12. y have to come up with an iterative method that finds the right shot trajectory You should not simply check every power angle combination but rather make an educated guess about a possible power angle combination and then make iterative changes to the angle until the correct trajectory is obtained It is also possible that you could create your own novel algorithm for finding hints 2 2 ec O X y onkey Y monkey tan 0 x monkey Project Submission For your solution to be properly received and graded there are a few requirements 1 Rename your main cpp file to P2 cpp and upload it to the submission site before the scheduled due date 9 00pm on Wednesday 13 November 2013 There will be a one hour grace period after which no submitted material will be accepted 7 ECE 2035 Project 2 Angry Monkeys v1 0 Fall 2013 2 You must demonstrate your system working properly to a TA for checkoff before 5 00 p m on Tuesday 26 November 2013 A Doodle schedule will be available to sign up for checkoff appointment You should design implement and test your own code Any submitted project containing code other than the initial setup code not fully created and debugged by the student constitutes academic misconduct Project Grading The project weighting will be determined as follows part description due date percent IP2 1 Angry Monkeys Program Wednesday 13 November 2013 rename main cpp to P2 cpp and upload before 9 p m T
Download Pdf Manuals
Related Search