Viewing Output With IRIS Explorer
Contents
1. A Tutorial Based Users Manual for Poly3D 44 7 f CHAPTER 4 Viewing Output With IRIS Explorer Starting With IRIS Explorer Building Tools to Visualize Your Data To start Explorer type explorerat the prompt Your task when using Explorer to build a visualization tool is to assemble and link a group of computational modules which can Read your data Transform the data into appropriate graphical elements Allow you to select what is to be displayed Render the data in an interactive 3D environment Explorer has three windows 1 Librarian which holds a list of all modules and maps 2 Log which lists operations and error messages 3 Map Editor which acts as the graphical interface for building and running visualization tools Drag and drop modules from the Librarian to the Map Editor Use the right mouse button to connect modules Once saved module maps are also included in the Librarian and can be dragged and dropped to open To learn Explorer begin by experimenting with examples provided by NAG or the Poly3D visualization tools described on the next page A Tutorial Based Users Manual for Poly3D 45 CHAPTER 4 Viewing Output With IRIS Explorer Tools for 3D Visualization of Poly3D Output Juliet Crider has written several tools to visualize parts of the Poly3D output file Each of these can be combined and linked to a single Render module to display any combina tion of parameters For ex2. Viewing Output With IRIS Explorer r f CHAPTER 4 Viewing Output With IRIS Explorer But Know Nothing About Explorer What is Explorer IRIS Explorer is a high level programming system designed for the creation of complex applications to visualize scientific data The code was developed by Silicon Graphics Inc SGI and is now owned and under continued development by the Numerical Algorithms Group NAG It runs on many UNIX and NT Platforms The visualization routines convert data files to three dimensional images The application is designed to be extremely flexible to conform to a multitude of analysis tasks Data may be viewed in three dimensions or any one or two dimensional subset of the data may be selected for analysis For example Poly3D output can be rendered as an image of the fault plane calculation grid and stress and displacement fields Figures 29 Figure 29a Perspective view of two overlapping semi circular cracks Grid on floor and walls show spacing of observations in the volume A Tutorial Based Users Manual for Poly3D 37 Figure 29b Principal stresses on an observation plane in the region between two overlapping normal faults Colored arrows show the direction and magni tude of the max tensile stress Ticks define the directions of the inter and min principal stresses Grey shading repre sents the location of the fault planes made transparent so that observations behind th
3. 99 66 in the header with dimensions of the fault array replacing lt x gt lt y gt and lt z gt This is the text flag for the DataScribe resolution vector and the vector itself Fora circular or elliptical fault with 10 concentric rings of 4 sided elements e g a fault meshed via Poly3D Forms the resolution is 20 20 5 Finally remove the dashed line which separates the header information from the fault data The last characters before the data should be x3 no quotes Figure 30 illustrates modifications to the Poly3D output file necessary to run inputFault Figure 31 shows an overview of the module If you have more than one fault in your model read them with separate copies of the inputFault module It 1s possible to render them together in Explorer A Tutorial Based Users Manual for Poly3D 39 CHAPTER 4 Viewing Output With IRIS Explorer LLL L FER gob si esti Sek lela COMI LED 1al 20 Ps Figure 30 Modifications to Poly3D output file necessary so that it may be read by the LHPL S FILB Ass a SILET GAAT lacl sper 23 eeka Fmi space upe ie asean PLES bes paale sipaiag laulis dager lS e aae ath aE ELAS STO LAS AHIS Awal Adieu SUE UG Pataca s Bule LEI Yokas Yala 30e ete Bats Sudo SWIG ELE DataScribe module Lane s Linda 4000 1ST InpuULr aut WLLL UL MU YALUB S Se eet CIP LTO AL ARLE BE bi kasen Pe r ee ra
4. IRIS Explorer Figure 33 shows an overview of the module Figure 33 DataScribe module to read displacement data from Poly3D output GaseSeralce A Tutorial Based Users Manual for Poly3D 42 CHAPTER 4 Viewing Output With IRIS Explorer Principal Stress Input Module inputPrstrss This module reads the principal stress magnitudes and directions from Poly3D output It separates sigma 1 sigma 2 and sigma 3 into separate lattices so that each can be treated as separate graphical elements To use add a line S resolution lt x gt lt y gt lt z gt to the header of the Poly3D output file The resolution is the same as the number of observation points in each dimension from the observation grid of the Poly3D input file Remove the dashed line which separates the header information from the principal stress data The last characters before the data should be s163 no quotes Note if you have also calculated the general stress tensor at each point modify the STRESSES header so that s1633 reads s33 see Figure 34 Figure 34 illustrates modifications to the Poly3D output file necessary to run inp tProtrisSsS LA PLT PEDA pir pda veda Erer OMATT kil 3 y SPETT CAGA TA N LATI ae Pep IDA eerie iIe ppa i De ies ire al LATIS apa he de aid ee Tai ghji pei dear be AS IGS RYE AA ihar Pirili ay Jr Fosaa Hibs iiai TiibT Fi
5. ample use viewFault and viewPrStress to render the images in Figure 29 Any of these maps may be easily modified to specific applica tions The maps are available via anonymous ftp from bishop stanford edu in the directory Ipu ub p dexplorer These tools may be periodically updated Please refer to the help files for each map for details on their function and for troubleshooting hints Access Help for any map by clicking the right mouse button with the mouse positioned over the name of the map in the IRIS Explorer Librarian Installing Maps and Modules on your Workstation To facilitate the use of these maps create a new directory in the explorer direc tory called poly3d The path to this new directory depends on where Explorer is installed on your machine The path to the new directory is likely to be usr explorer poly3d Place all the map and module files in this directory Then modify each user s explorerrcfile with the line category Poly3D usr explorer poly3d Substitute the appropriate path to the Explorer directory if necessary The maps and modules will now appear in the IRIS Explorer Librarian under the heading Poly3D A Tutorial Based Users Manual for Poly3D 46 CHAPTER 4 Viewing Output With IRIS Explorer Viewing Faults viewFault map This simple combination of modules renders a single fault in 3D space Combine two or more with a single Render module to show two or more faults Figure 36 g
6. e planes can be viewed CHAPTER 4 Viewing Output With IRIS Explorer os ee Poa ions Tk a tly a a oa cos Wien Eves iver iain eee ear ae a aet tit t ea Z Any component of the stress tensor or displacement vector may be viewed and any combination of components may be displayed together The user may view the output from any angle or distance from the fault plane s and can change viewpoints on the fly Throughout this overview I will illustrate the use of Explorer with example files of output from the boundary element code Poly3D Explorer is of course not limited to visualiz ing Poly3D output and has been used at Stanford to display digital elevation models and 3 D attributes from seismic data and has potential for many other uses How Do I Use IRIS Explorer There is an on line user s manual and tutorial for Explorer developed by NAG You can find it under Online Books in the Help directory on SGI workstations or check the man pages or help files for use on other machines After reading this overview you may wish to run through the Explorer tutorial It 1s useful to have the on line help beside you as you learn to use Explorer and the companion applications DataScribe and ModuleBuilder To use Explorer you must have access to this software and a data set to work with A sample data set is available by anonymous ftp from bishop stanford edu in the directory pub p3dexplorer Chapter 4 was written by Juli
7. et Crider in November 1996 for the Stanford Rock Fracture Project and has been updated for use in this users manual A Tutorial Based Users Manual for Poly3D 38 7 f CHAPTER 4 Viewing Output With IRIS Explorer Understanding Data Scribe DataScribe Modules to Read Poly3D Output Juliet Crider has written three DataScribe modules to convert Poly3D output to Ex plorer lattice format Each module requires the user to make minor modification to the Poly3D output file to run properly These modules are available via anonymous ftp from bishop stanford edu in the directory pub p3dexplorer These tools may be periodically updated Please refer to the help files for each module for details on their function and for troubleshooting hints Access Help for any module by clicking the right mouse button with the mouse positioned over the name of the module in the IRIS Explorer Librarian Use these modules to convert your Poly3D data or as templates to design your own modules to read other types of data Input Fault Module inputFault This module reads a single planar fault from Poly3D output geometry of the fault To use extract output geometry for each fault and save as a separate file Juliet suggests the extension fault1 or fault 2 etc with the original file name Be sure to indicate print_elt_geom yes inthe Poly3D input file before you run the model Add a line f resolution lt k gt lt y gt lt z gt
8. ives an overview of the map Figure 36 Explorer map viewFault to render fault plane from Poly3D See text for description of the modules The function of each module is described below FileListBrowse select the fault data you wish to view inputFaulrt DataScribe module to read fault output geometry from Poly3D output files see above Triangulate2D maps data to triangular grid removes duplicate points Pye loGeom Converts data to geometric elements Choose dimension 0to show only verti ces dimension 1to show triangular grid does NOT correspond to Poly3D polygonal elements dimension 2 to show solid plane Read inacolormap for colors other than white Render renders the fault in interactive 3D see below A Tutorial Based Users Manual for Poly3D 47 CHAPTER 4 Viewing Output With IRIS Explorer Viewing Displacement Fields viewDisp map This map produces contours of U1 U2 or U3 displacement magnitude on any x y or z slice through the observation volume Figure 37 gives an overview of the map Figure 37 Explorer map viewDisp to contour displacement magni tudes from Poly3D output See text for description of the modules The function of each module 1s described below FileListBrowse Select the displacement data you wish to view inputDisp DataScribe module to read displacement data from Poly3D output files see above BoundBox Shows boundary of data volume Toggle max or min
9. la 038k diag s Mouli THAE NDAN Arik hlodi SL He Lame r Lanha Yee PRII LY FL T EALL JFE Di CUS DITH SIRE ire nseinn hes 2 ir msr meii Figure 32 EMILE TAL 5 m resolution vector Modifications fo ae tent Bag A mame Poly3D output file p z es ee necessary so that it a a _ i may be read by the Fe MMHG See EAE EEROR T DataScribe module BE Con i O change or InpulLDasp NSP LL delete text here H T Hii Ta Ar Bi Kijiei ijz Az eee ihe Ha wand hys MT DA NOn AAAA IR TULLAT PIRAS RENG NS SAAIE MS APTON N Mame UAG AA GAMAN Tent li 2 Qis H021 Hi ANI iA Tn LRT 4D ee on al eeni nHn ig AHi R Pes 1 SOLS 0027 GAA Leds OR Dee OF Glade OT fae OS She Di 3 Ale 4 Eeg 845 te 5 ge e addes 41157 DIN Iiia Saiki i a5 oh te Tie a M ot MA NG Atip Ca mel SNES ie ats ardi jr 2 ayes sao Woe aoe aie a o l E de ded foul des OTSERV taR ji lbeplase OS MST CTR Ts eS elalsal CUPPED GR LD Esk elinbal OLS FL RAL E X xo bs Lil id i Abr URE Ae Silea se ee A PRE a DT Te T a G7 40 1JWK 4 SF A ea TEA 1 Maw ME AA d T e a i A i 4 3 H dAl PESA said aei How JE OSM ad te Aee idden A T HE 1 te Aes Aa d jedin Hara eH USB 2 Ue ch Bees h Deel AIO eg id SO SIn ce DT eo d i d Figi li h es AAi AAND Lel dT Faa in T DE deg Mpap g jaie il g aA ee ee GSS das energ WAA lA Vs LE ama ee Tie A Tutorial Based Users Manual for Poly3D 41 CHAPTER 4 Viewing Output With
10. lth la is mom OOI ilni Pestle UL Ly lamiera AETI TT BLIP OTL Twi ih JH iti siw r HF hL WII H ot 1p peda he npepe rwg eee n ar Ay Figure 34 a tal flag E as Modifications to ae Poly3D output file ates ga r necessary so that it o oi HOTT Sunt ES m aoa auu Gelle taxi here aa be ca byte i en nr a EA eee marie pies eee aia DataScribe module ba et iTe a oY Ly ak Fe all Dy ed ee id P ee deir pfii A Tpi piii m iTA ECM de ip RAN A FS A d ee LiT Inpu LCFroCress AA A EE E A S Pe i ae Te rer ae Liai IpI Bs i diet jhj ods te ee me alas Feld Re em hiii E LLES a TAE TET i Le 2 aed T bia ipid pY d Srp ae Ur le al Pe ee db a a Md MEPL RAI TEN bE Xi a YI h o S2 WS mi e a a a ZE Wl MI h WEJ A Whi fi Ai i ja er re ee ee d 4 Ae poe a fe AT l a al agi pami WT SS ET pirti iiie ji HEY d Tiki Pete wt i a hai Des eb pee Se eee 72 Tra Pe Wik wt ha 33e Lrj juss a b T Jakk Ji e A i F iin a ae 2 thei Span u Haa AA N1 IIE m li iHn 3 F D Wh TC 4 Ae a1 pr Sa HUET iie ie A ns IIe delele dashed line hare Ye i A Tutorial Based Users Manual for Poly3D 43 CHAPTER 4 Viewing Output With IRIS Explorer Figure 35 shows an overview of the module cewer ile iW 7 Camiel m Uu Wed Gude IES e y Figure 35 DataScribe module to read principal stress data from Poly3D Tes output Tale eit a ase rrdikr F kier talked Gate Alarmy dese E
11. on or off for each dimension to plot grid on walls floor or ceiling of the bounding box Default color is white Orthos lice Extracts 2D slices from 3D data i slice is normal to x x1 j to y x2 and k to z x3 Slice Number moves you up and down or back and forth among the slices Contour Contours values in x y and z axes Choose range number of levels contour lines maximum 10 and data channel In this example choose channel 1 for Ul values channel 2 for U2 values andchannel 3 for U3 values To show 3D contour surfaces wire frame omit OrthoSlice Rambow color red low violet high is default To change read your owncolormap into the module see users guide and GenerateColormapmodule Render bounding box in interactive 3D see below A Tutorial Based Users Manual for Poly3D 48 CHAPTER 4 Viewing Output With IRIS Explorer Viewing Principal Stresses viewPrStress map This map creates vectors which indicate the direction of a principal stress The color of the vectors is related to the stress magnitude View all data or selected slices or volumes Combine three of these maps with one input PrStrss module and one Render module to view all3 principal stresses Figure 38 gives an overview of the map The function of each module is described below Figure 38 Explorer map viewDisp to contour displacement magni tudes from Poly3D output See text for description of the modules FileListBr
12. owse select the Poly3D data you wish to view LApPUCEYrStrss DataScribe module to read principal stress magnitude and direction from Poly3D output files see above Wire only one lattice SigmaOne SigmaTwo or SigmaThree to each SampleCrop module BOuUnaBOXx Shows boundary of data volume Toggle max or min on or off for each dimension to plot grid on walls floor or ceiling of the bounding box Default color is white SampleCrop Choose the volume of data you wish to view Whenmax and min values are the same for any one dimension you will see a planar slice Set Sample to 1 to view every data point in the selected volume sample 2 displays every other observa tion point etc Channel selecc Select channel 4 to extract stress magnitude A Tutorial Based Users Manual for Poly3D 49 CHAPTER 4 Viewing Output With IRIS Explorer MultiChannelSelect Select channels 1 2 3 for direction cosines of the stress vector VEC LCOrs Creates geometric elements from magnitude and direction data Wire the direction cosines MultiChannelSelect to theVectorField Wire stress magni tude ChannelSelect to the ScalarField Choose a scale factor less than 1 when displaying all data Choose vectors for fast rendering 1D lines with arrowheads tubes and arrows for slower 3D images tubes have no heads VECTCOlS lt Z To produce double headed arrows centered on each observation point wire this second module as above bu
13. rnal dct i l al ie ky i Tl ee ae ne ene reall tan YWaclor tost fla ELEM ES SL Stade be a CTRL sh CVSJEC T cau BLL Werle iue 7 5 UFS Usa WIS UASU UEUS Uday DREY BED aA dd delete dashed Ime wre Figure 31 Ect EEEE fe me le 7 DataScribe module to read fault geometry data from Poly3D output SSS nn nnn nn ere A Tutorial Based Users Manual for Poly3D 40 CHAPTER 4 Viewing Output With IRIS Explorer Displacement Input Module inputDisp This module reads displacement magnitudes in x y and z from Poly3D output file To use add a line d resolution lt x gt lt y gt lt z gt to the header of the Poly3D output file The resolution is the same as the number of observation points in each dimension from the observation grid of the Poly3D input file Remove the dashed line which separates the header information from the principal stress data the last characters before the data should be u3 no quotes Note if the file also contains information regarding displacement on the fault this flag is not unique Change u3 and U3 to something else see Figure 32 Figure 32 illustrates modifications to the Poly3D output file necessary to run inputDisp DE CPS CRU peck pecioi Menken COME Ir D bye TPIT FIR G5A7 tin THis GSAT beilr vpos 45 nalas 2 pang neng cirastrainsd LILLE wins pail dipping Cal i apes 2 cee We esi CLAS HE CONS TAS TS Slave Podul SAIN hon Poi aa e Ro
14. t and all the Img applications have exten sive man pages refer to them for further instructions To convert the image to TIFF format for export to other platforms such as Mac or software such as photoshop or Canvas use imgcopy and specify TIFF format with the extension tif on the outfile name as follows imgcopy infile rgb outfile tif A Tutorial Based Users Manual for Poly3D 52 CHAPTER 4 Viewing Output With IRIS Explorer Figure 39 Contours of vertical displacement on the free surface above two normal faults The default black i background has been changed to white for i ease of printing IRIS Explorer Information On line Numerical Algorithms Group UK http www nag co uk Welcome_IEC html the main web center for Explorer includes example applications links to user groups FAQ etc IRIS Explorer Centers US http www nag com 1 IEC includes introductory information and a tutoria NOTE IRIS Explorer is just one of many commercially available software packages for visualizing scientific data Poly3D s single column formatted text output is compat ible with most visualization tools Other software packages used successfully to view Poly3D output include Fortner Transform now Noesys Mathematica GoCAD and Deltagraph A Tutorial Based Users Manual for Poly3D 53
15. t with a scale factor equal in magnitude but opposite in sign GenerateColormap Colors vectors according to stress magnitude Wire magnitude ChannelSelect to DataIn wire outputLatticeto Colormap of both Vector modules Render Renders vectors and bounding box in interactive 3D see below A Tutorial Based Users Manual for Poly3D 50 r f CHAPTER 4 Viewing Output With IRIS Explorer A Quick Guide to Using the Render Model The Render module is the interactive 3D viewer which permits you to spin zoom translate and fly through your data You can output the view to be used with any OpenInventor viewer Here s a quick guide to traveling through your on screen data in Explorer mode left mouse button cupped hand 3d rotate or spin around the center of the field of view center mouse button flat hand translate in plane up down side to side or diagonally left center mouse buttons pointing hand zoom Pull the mouse towards you to zoom in away to zoom out Ctrl left mouse button vortex spins in 2d displays center of rotation and radius of spin arm Right mouse controls pop up menus to alter attributes of the viewing window and environ ment Viewing allows manipulation of the image Decoration puts tools in the frame of the viewer arrow edit manipulate the image see Manips menu hand change viewing position default see above starts help house home view house with arrow re set home view e
16. ye fit to window crosshair move selected point to center and center of rotation box toggle perspective or ortho view Headlight changes lighting conditions see Lights menu A Tutorial Based Users Manual for Poly3D 51 7 f CHAPTER 4 Viewing Output With IRIS Explorer Using Images in Other Applications This section addresses porting images from Explorer to other applications and formats There are two easy ways to capture an Explorer image analog and digital Analog Capture Take a photograph with a real camera of the image on the screen This method yields high resolution good results Place camera on tripod a few feet from the screen Use the self timer or a cable release to avoid shaking the camera when taking your photos Take photos in a darkened room shutter speed 4 1 4 second Previous had success making prints with 100 and 200 speed film at a range of f stops Digital Capture Print from the Render module to a file On an SGI computer you have the choice between PostScript and RGB PostScript isnot entirely WYSIWYG RGB is not compatible with many applications OR Take a screen capture with the snapshot tool see Figures 31 33 and 35 38 Snapshot saves images in the SGI rgb format The image can be viewed in SGI s Imgview Type imgview lt filename gt at the gt prompt Compviewcan compress the image file using JPEG compression Imgworksis a Photoshop like tool to alter your image on the SGI Snapsho
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