Improving Numerical Accuracy

Solutions to Coplanar Primitives



• Decal
  glEnable(GL_DEPTH_TEST), glDepthMask(GL_FALSE)
  
  • Draw underlying polygon
  • Draw top polygon (decal)
    glEnable(GL_DEPTH_TEST), glDepthMask(GL_TRUE)
    glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE)
  • Draw underlying polygon
    glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE)

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