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world coords to pixel coords

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1. Transform XYZ to camera space: multiply XYZ by camera matrix.
2. Project XYZ-in-camera-space on screen:

xScreen = ( x / z * focus ) + screenWidth/2;
yScreen = ( y / z * focus ) + screenHeight/2;

Where "focus" is some constant, usually close to screenWidth/2.
Or, more exact:

focus = (screenHeight/2) / tan( FOV/2 );

Or use projection matrix.

Edited by - Meduzza on October 3, 2000 11:30:39 AM

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