perspective - meaning of m34 of CATransform3D -

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what's meaning of m34 of structure catransform3d, know can change perspective, what's meaning when value -0.001 , 0.001?

you can find full details here. note apple uses reversed multiplication order projection (relative given link) matrix multiplications reversed , matrices transposed.

a short description of meaning:

  • m34 = 1/z distance projection plane (the 1/ez term in reference link)
  • + z axis towards viewer, resulting in "looking in mirror" feel when using -
  • projection center (0,0,0) plus translations set up

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