OpenGL Programming 2 Course Example Programs This software will only compile/run on a >= 5.3 Irix system with gl_dev and x_dev products loaded. However, some of the examples use extensions that are only available on systems running IRIX 6.2 or later. Such examples have been properly #ifdef'ed so that they will compile, but they will not always do something intelligent. This subtree contains the example programs included in the OpenGL Programming 2 Student Manual available through SGI's customer education program. * accum: programs using the accumulation buffer to achieve scene anti-aliasing, depth-of-field, and motion blurring effects. * texture programs demonstrating basic texture mapping. Include using gluBuild2dMipmaps() to scale and load mipmaps for a single texture image and then applying this to a polygon; reading in a texture from an rgb file, setting the texture and the texture environment, then applying the texture to a rectangular polygon using explicit texture coordinates; and mipmaps. * clipping: demonstrates defining and using arbitrary clipping planes. * feedback demonstrates use of OpenGL feedback, where one can toggle in and out of feedback mode. * fog demonstrates using different types of fog including exponential, exponential squared, and linear as well as altering the density value. * nurbs demonstrates using nurbs curves and surfaces. It includes an example of using nurbs in display lists, setting the various nurbs properties, and trimming nurbs surfaces. * raster programs demonstrating the use of raster positioning and pixel operations, including creating a collage of images, use of the glCopyPixels() and glPixelZoom() routines, plus displaying an rgb image and file (and a subimage) in a window and writing pixel data from the window to an image file. * selection two programs: 1 demonstrates picking, and the other, selection. * stencils demonstrates a simple application of the stencil planes to mask an arbitrary screen area. * texture programs demonstrating more advanced texture mapping features, including reading a texture from an rgb file, setting up the texture and a sphere map texture environment and then applying them; as well as using automatically generated texture coordinates; a demonstration of storing textures in display lists where the objects are drawn using environment mapping; and a number of texture extensions. * image_extensions: programs demonstrating a number of extensions that are useful for image processing, including EXT_convolution, EXT_histogram, EXT_subtexture. * sgi_extensions: programs demonstrating a number of extensions that are only availabe on a subset of SGI platforms, including SGIS_multisample, and SGIS_sharpen_texture Two appendices are provided to help transition from IRIS GL to OpenGL. irisgl_vs_opengl Programs that demonstrate some of the differences between IRIS GL and OpenGL. porting An appendix the walks through some examples of porting IRIS GL programs to OpenGL. Includes information about writing mixed model programs, with and without using a widget set. The programs in the directories above can be invoked individually, or through the buttonfly command. In each directory, there are two menu files named 'menu_directoryname' and 'm_directoryname'. They are installed in the directory as '.menu' and '.m_directoryname', respectively. .menu specifies a button for the directory and .m_directoryname contains the information about how to run each program. To use the buttonfly program, run the RUN_DEMOS script in the opengl2 home directory. % ~opengl2/RUN_DEMOS
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