ReversedSphere Map Math

To aid construction of sphere maps



• After a bit of algebra
  • rx = 2 ? -4s2 + 4s - 1 - 4t2 + 4t (2t - 1)
  • rY = 2 ? -4s2 + 4s - 1 - 4t2 + 4t (2s - 1)
  • rZ = -8s2 + 8s - 8t2 + 8t - 3
• Reverse map useful to “build” sphere maps

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