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How to inverse Y axis ?

Blitz3D Forums/Blitz3D Programming/How to inverse Y axis ?

Red(Posted 2003) [#1]
... It's about matrix operation.


Floyd(Posted 2003) [#2]
Multiply y by -1.

If you mean a 3x3 matrix then 
1  0  0
0 -1  0
0  0  1