HP c8000 manual Programming hints

Page 5

Contents

5. programming hints

OpenGL correctness hints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 4D values. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 texture coordinates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 OpenGL performance hints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 display list performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 geometric primitives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 GL_COMPILE_AND_EXECUTE mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 draw array set extensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 benefits of glDrawArraySethp: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 using glDrawArraySethp: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 textures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 state changes and their effects on display lists . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 regular primitive data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55 texture downloading performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56 selection performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56 state change . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56 optimization of lighting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58 occlusion culling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58 high frame rate applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58 rescaling normals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

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Contents OpenGL Implementation Guide Legal Notices Contents Installation and setup Programming hints Contents Overview of OpenGL OpenGL Reference Manual IntroductionHp’s implementation of the OpenGL libraries OpenGL productHp’s implementation of OpenGL Supported operating systems Supported graphics devicesVisual Table for HP Visualize fxe Supported visualsVisual Table for ATI Fire GL T2/X1/X3 Visual support for other graphics devices Stereo Visual Support for HP Fire GL-UXSigchld and the GRM daemon Buffer sharing between multiple processes and threadsBit programming SLS support Sample 64-bit compile and link for 11.x onlyOpenGL Utilities Library GLU Standard OpenGL productInput and output routines OpenGL extensions for the X Window system GLXOpenGL product Mixing of OpenGL and Xlib Gamma correction Visibility test extensions OpenGL extensionsOcclusion extension Occlusion culling code fragmentsEnumerated Types for Occlusion GLHPsupersample extension Rendering details Default visualsEXP and EXP2 fogging Bow-tie quadrilateralsVertices outside of a begin/end pair Index mode ditheringDecomposition of concave quadrilaterals Environment variables New environment variables as of release Switches to the faster double buffering method Installation and setup Installation and setup Verify that OpenGL is on your workstation Verification instructionsIs your system software preloaded with instant ignition? Install OpenGL Installing OpenGLOpenGL Development Environment Filesets for 11.0 Check log file Verify the product OpenGL file structure 64-bit libraries are in a subdirectory OpenGL file structure Chapter Running OpenGL programs Special considerations Virtual GLX VGL modeVisual support for the VGL mode Bool hpglXDisplayIsVGLDisplay *dpy, int screen Running hps implementation of the OpenGL stereo application Running hps implementation of the OpenGL stereo application Running OpenGL programs Compiling and linking programs Subdirectory This Directory Contains OverviewIncluding header files Linking shared libraries Compiling 32-bit and 64-bit applications for OpenGL OpenGL procedure calls Programming hints Programming hints Texture coordinates OpenGL correctness hints4D values OpenGL performance hints Glcompileandexecute modeDisplay list performance Geometric primitivesDraw array set extensions State changes and their effects on display lists TexturesRegular primitive data Selection performance Texture downloading performanceState change High frame rate applications Optimization of lightingOcclusion culling Rescaling normals OpenGL performance hints
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