Position Pass

位置通行证

Basic 基础

Position Pass

位置通行证

The Position Pass can be used in 3D-compatible compositing applications that can in turn be used to create all sorts of effects with it.

位置传递可以用于3d 兼容的合成应用程序，反过来可以用它创建各种效果。

In short, this pass contains 32-bit encoded positional information. The composition application knows the location of each pixel in 3D space and can - depending on the application itself - calculate effects such as new lighting, 3D masks or other three-dimensional effects.

简而言之，此传递包含32位编码的位置信息。组合应用程序知道每个像素在3D 空间中的位置，并且可以根据应用程序本身计算新的照明、3D 掩模或其他三维效果等效果。

Tip: 提示:
 Since the position information is 32-bit encoded and can also contains negative values, such a pass can only be saved in 32-bit image formats: B3D, OpenEXR, PSD, PSB, TIF. 由于位置信息是32位编码的，也可以包含负值，这样的传递只能保存在32位图像格式: B3D，OpenEXR，PSD，PSB，TIF

OpenEXR is the recommended format.

OpenEXR 是推荐的格式。

Note that Photoshop CS5 often has difficulty handling negative values and also cannot correctly read OpenEXR layers.

注意，Photoshop CS5通常很难处理负值，也不能正确读取 OpenEXR 图层。

Make sure of the following when using this post effect:

在使用这个 post 效果时，请确保以下内容:

Edge antialiasing has intentionally been omitted from the Position Pass function because this would render it unusable.

在 Position Pass 函数中有意省略了边缘平滑，因为这会使它不可用。