Calculating Normals Speed Tips

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fredborg

It looks like you are over complicating it. The following pseudo code, shows a simpler way:

For Every Vertex
 NormalX = 0.0
 NormalY = 0.0
 NormalZ = 0.0
Next

For Every Triangle
 CalculateNormal
 For Every Vertex Used By Triangle
  NormalX :+ TriangleNormalX
  NormalY :+ TriangleNormalY
  NormalZ :+ TriangleNormalZ
 Next
Next

For Every Vertex
 NormalLength = SquareRoot (NormalX^2 + NormalY^2 + NormalZ^2)
 NormalX :/ NormalLength
 NormalY :/ NormalLength
 NormalZ :/ NormalLength
Next