Computer Graphics Programming I - FreeDesktop.Org

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Multipass Rendering Please...no 5 th Element jokes. Multi-pass rendering is used more work has tobe done than the hardware can handle.● Example: produce correct specular highlights ontextured objects withoutGL_EXT_separate_specular● Example: want to do bump-mapped shading fordiffuse and specular, but only have 2 texture units20-November-2007 © Copyright Ian D. Romanick 2007
Multipass Rendering (cont.) Divide rendering into steps that the texturecombiners can do and that are separated bymath that the blender can do● Example: Perform diffuse textured pass. Configureblender to add fragment color to framebuffer.Finally, perform specular-only pass.20-November-2007 © Copyright Ian D. Romanick 2007
Page 1 and 2: Computer Graphics Programming I Age
Page 3: Fog Parameters Fog has 4 main param
Page 6 and 7: Heightbased Fog Fog factor is giv
Page 8 and 9: Heightbased Fog (cont.) Store a l
Page 10 and 11: Radial Fog GL_FRAGMENT_DEPTH based
Page 12 and 13: Blending Typically used for one of
Page 14 and 15: GL_EXT_blend_colorC srcF src C dst
Page 16 and 17: Blend Equation C dstC src× ×F src
Page 18 and 19: Referenceshttp://en.wikipedia.org/w
Page 22 and 23: Problems with Multipass Why do we
Page 24 and 25: Problems with Multipass Why do we
Page 26 and 27: Referenceshttp://www.bluesnews.com/
Page 28: Legal Statement This work represent

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