15-462 Lecture 13: Texture Mapping

03/14/2002

15-462 Graphics I

Other Texturing Issues

•glTexEnvi(GL_TEX_ENV, GL_TEX_ENV_MODE, GL_MODULATE)

–Will balance between shade color and texture color

•glTexEnvi(GL_TEX_ENV, GL_TEX_ENV_MODE, GL_DECAL)

–Will replace shade color with texture color

•glHint(GL_PERSPECTIVE_CORRECTION, GL_NICEST)

–OpenGL does linear interpolation of textures

•Works fine for orthographic projections

–Allows for OpenGL to correct textures for perspective projection

•There is a performance hit

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•Texture objects

–Maintain texture in memory so that it will not have to be loaded constantly