PerspectiveProjection - Adobe ActionScript 3 (AS3 ) API Reference

This question was posted in response to the following article: http://help.adobe.com/en_US/FlashPlatform/reference/actionscript/3/flash/geom/PerspectiveP rojection.html

The image of frustum volume is wrong. The viewpoint in the image should be (projectionCenter.x, projectionCenter.y, -focalLength), instead of (0, 0, -focalLength).

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