iphone Programming Glossary: wminusa

OpenGL ES (iPhone) Touch Picking

http://stackoverflow.com/questions/2231433/opengl-es-iphone-touch-picking

Mminus1 11 v 3 Mminus1 12 v 0 Mminus1 13 v 1 Mminus1 14 v 2 Mminus1 15 v 3 r a t w a GLfloat a 0.0f 0.1f 0.0f GLfloat wminusa w 0 a 0 w 1 a 1 w 2 a 2 vector 0 a 0 vector 1 a 1 vector 2 a 2 vector 3 w 0 vector 4 w 1 vector 5 10.0f 3 non colinear points.. p3 1 p1 1 p3 0 p1 1 p2 1 p1 0 p2 1 p3 2 p3 1 p2 2 p2 0 p3 1 p1 2 p1 1 p3 2 p3 0 p1 1 p2 2 p2 1 p1 2 GLfloat PnRd lp 0 wminusa 0 lp 1 wminusa 1 lp 2 wminusa 2 if PnRd 0 GLfloat PnR0D lp 0 a 0 lp 1 a 1 lp 2 a 2 lp 3 if PnR0D 0 GLfloat t PnR0D PnRd.. p1 1 p2 1 p1 0 p2 1 p3 2 p3 1 p2 2 p2 0 p3 1 p1 2 p1 1 p3 2 p3 0 p1 1 p2 2 p2 1 p1 2 GLfloat PnRd lp 0 wminusa 0 lp 1 wminusa 1 lp 2 wminusa 2 if PnRd 0 GLfloat PnR0D lp 0 a 0 lp 1 a 1 lp 2 a 2 lp 3 if PnR0D 0 GLfloat t PnR0D PnRd if t 0 GLfloat..

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