HP c8000 manual Decomposition of concave quadrilaterals, Vertices outside of a begin/end pair

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overview of OpenGL

rendering details

decomposition of concave quadrilaterals

HP determines whether the concave quadrilateral will become front-facing or back-facing prior to dividing the quadrilateral into triangles. HP then divides the surface into two triangles between vertices zero and two or one and three depending on the vertex causing concavity.

vertices outside of a begin/end pair

HP’s implementation of this specification is indeterminate as defined by the OpenGL standard.

index mode dithering

If dithering is enabled in indexed visuals, 2D functions such as glDrawPixels() and glBitmap() will not be dithered.

Chapter 1

23

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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 OpenGL OpenGL productHp’s implementation of the OpenGL libraries 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 quadrilateralsDecomposition of concave quadrilaterals Index mode ditheringVertices outside of a begin/end pair Environment variables New environment variables as of release Switches to the faster double buffering method Installation and setup Installation and setup Is your system software preloaded with instant ignition? Verification instructionsVerify that OpenGL is on your workstation 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 Visual support for the VGL mode Virtual GLX VGL modeSpecial considerations 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 4D values OpenGL correctness hintsTexture coordinates 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 Occlusion culling Optimization of lightingHigh frame rate applications Rescaling normals OpenGL performance hints

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