HardwareShadow Mapping

Shadowing with a depth map texture



• Software version described by [Reeves 89]
• Requires hardware support [Segal, et.al. 92] for
  • A “depth texture” (see SGIX_depth_texture)
  • A “depth compare” texture filter operator(see SGIX_shadow)
• Uses eye-linear texgen to generate texture coordinates (s/q,t/q,r/q) in light’s coordinate space

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