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Frustum Node


Description

Outputs the perspective projection matrix:

2.0 * znear / (right - left) 0.0 (right + left) / (right - left) 0.0
0.0 2.0 * znear / (top - bottom) (top + bottom) / (top - bottom) 0.0
0.0 0.0 -(zfar + znear) / (zfar - znear) -2.0 * zfar * znear / (zfar - znear)
0.0 0.0 -1.0 0.0

Coordinates of top, left, right, bottom are set relatively to center point of the znear plane.

There are two different points (A and B) on the picture above. Since the top, left, right, bottom are coordinates relatively to the center point of the znear plane, coordinates of the A point should be A(left, bottom, znear). Coordinates of the B point are B(k * left, k * bottom, zfar), where k = zfar/znear.

Ports

Name Description
LLeft coordinate of the near clipping plane relatively to the center
BBottom coordinate of the near clipping plane relatively to the center
TTop coordinate of the near clipping plane relatively to the center
NDistance to the near depth clipping plane
FDistance to the farther depth clipping plane
Last update: 2021-12-13
Build: ()