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注意! 这个版本的文档是过时的,因为它描述了一个较老的SDK版本!请切换到最新SDK版本的文档。
注意! 这个版本的文档描述了一个不再受支持的旧SDK版本!请升级到最新的SDK版本。

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: 2023-06-23
Build: ()