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May 20th, 2018
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  1. DotProd = -DirX*NormX -DirY*NormY -DirZ*NormZ
  2.  
  3. IF DotProd < 0
  4. NormX = -NormX
  5. NormY = -NormY
  6. NormZ = -NormZ
  7. DotProd = -DirX*NormX - DirY*NormY - DirZ*NormZ
  8. ENDIF
  9.  
  10. DirX = DirX + NormX*DotProd*2
  11. DirY = DirY + NormY*DotProd*2
  12. DirZ = DirZ + NormZ*DotProd*2
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