Lance Arsenault John Kelso Ron Kriz

May 24, 2001 Data visualization in the Engineering Sciences using DIVERSE Item7- Student projects (91,92, … 01)

evice ndependent irtual nvironments- econfigurable, calable, xtensible

u May 24, 2001 Overview C++ API Free, Open source LGPL libraries, GPL applications SGI IRIX and GNU/Linux Support for all three IRIX binary types

u May 24, 2001 Goals Modular Only use the parts you need Flexible Easy to reconfigure and extend Same program works on all hardware No changes to application

u May 24, 2001 We always tried to keep this in mind… Stay out of the user’s way They know better than we do how to do their job Augment instead of replace Build on existing packages, don’t reinvent new ones Works by default Lowest-common-denominator defaults work anywhere

u May 24, 2001 Who uses DIVERSE? US Navy: 3d target-acquisition visualization for submarines Dynamic ship-crane project Lockheed-Martin: Tools for collaborative engineering. NIST: Visualization of complex data sets Haptic device for probing data set densities

u May 24, 2001 Two separate packages DTK- the DIVERSE ToolKit Contains classes not related to graphics A standalone package in its own right dgiPf- the DIVERSE graphics interface for OpenGL Performer™ Built using DTK and Performer

u May 24, 2001 DTK DIVERSE ToolKit Library C++ classes used to build server and applications Server Manager of services A true daemon, in the form of a select server Services Interfaces to hardware devices or virtual surrogates Loaded and unloaded into server at run-time as DSOs

u May 24, 2001 dgiPf DIVERSE Graphics Interface for Performer Uses DTK and Performer to provide: Configuration via DSOs Display-independent graphics Coordinate systems and scenegraph Symmetric and asymmetric viewing frusta Stereo parallax Generic input devices Navigation New Performer node types

u May 24, 2001 DIVERSE distribution includes: Library for application development Stand-alone application programs and utilities Several dozen small programs to illustrate specific features of dgiPf Written to be easily moved and modified

u May 24, 2001 The only thing you should say before giving a demo is “watch this”

u May 24, 2001 diversifly Application program Loads model files with optional transformations Behavior can be modified via DSOs

u May 24, 2001 diversifly demos Performer Town on a desktop: diversifly --origin town.pfb Performer Town in a Cave TM simulator: env DGIPF_DSO_FILES=desktopCaveSimGroup \ diversifly --origin town.pfb

u May 24, 2001 Hello World! #include int main(void) { pfInit(); dgiPf app; pfConfig(); app.display()->world()-> addChild(pfdLoadFile(”model.pfb")); while( app.state & DGIPF_ISRUNNING ) pfFrame(); pfExit(); return 0; }

u May 24, 2001 hello.C demos Default, no navigation or input devices: hello Cave Simulator: env DGIPF_DSO_FILES=desktopCaveSimGroup \ hello Desktop: env DGIPF_DSO_FILES=desktopGroup \ hello

u May 24, 2001 hello.C demos Desktop, writing navigation to DTK shared memory: View the data in a terminal window: env DGIPF_DSO_FILES=desktopGroup:\ navDTKOutput hello dtk-readFloats nav --carriage-return

u May 24, 2001 hello.C demos While the writer is running, start a reader: Desktop, with navigation read from DTK shared memory: env DGIPF_DSO_FILES=simpleDisplay:\ keyboardMouseInput:\ iconSleepKeyboardMod:\ toggleObjectsGroup:\ dtkNav \ hello

u May 24, 2001 hello.C demos Terminate the writer and use sliders to write data: dtk-sliders nav --number 7 \ --scale scale scale \ --scale scale \ --scale scale \ --labels x y z h p r scale

u May 24, 2001 hello.C demos Run another reader: Cave simulator, with navigation read from DTK shared memory: env DGIPF_DSO_FILES=desktopCaveSimGroup:\ dtkNav hello

u May 24, 2001 hello.C demos And finally, a Cave Simulator, with navigation written to DTK shared memory, and a flashlight: env DGIPF_DSO_FILES=desktopCaveSimGroup:\ navDTKOutput:wandLight hello

u May 24, 2001 Future directions dgiGL (summer 2001) Augments OpenGL Support for many more platforms dgiOi (fall 2001) Adds Open Inventor scenegraph to dgiGL

u May 24, 2001 Future directions head’s up displays (summer 2001) hooks to VTK (summer 2001) more navigation and simulation techniques (summer 2001) collaborative tools (fall 2001) motion queuing (fall 2001) new devices Phantom haptic device (fall 2001) Xwand (summer 2001) PocketPC (summer 2001)

u May 24, 2001 Want to know more? Visit andwww.diverse.vt.edu Download and try it out Read the friendly manuals Contact: Lance Arsenault John Kelso Ron Kriz

u May 24, 2001