DepthWithColor-D3D.fx问题 [英] DepthWithColor-D3D.fx question

问题描述

我正在查看DepthWithColor-D3D.fx中的代码并且不理解以下转换

    //删除玩家索引信息并转换为米数
    float realDepth = depth / 4000.0;

不应该是 

    float realDepth =（深度>>> 3）/ 4000.0;

更改此行后，投影图像变小了很多。不知道如何弥补这一点。是否有可能获得更多额外的解释 如何计算缩放因子和坐标？

非常感谢！

解决方案

此文件的副本除以8000.0。你确定你的副本说4000.0吗？

float realDepth = depth / 8000.0;

因为右移3和8除以相同，这实际上与以下内容相同：

float realDepth =（depth>> 3）/ 1000.0;

...但它是在一次操作中完成，这应该更快。

约翰

K4W开发

Hi,

I am looking at the code in DepthWithColor-D3D.fx and don't understand the following convertion

    // remove player index information and convert to meters
    float realDepth = depth / 4000.0;

Shouldn't it be 

    float realDepth = (depth >> 3) / 4000.0;

After I change this line the projected image becomes a lot smaller. Not sure how to compensate for this. Is it possible to get some more additional explanation how the scaling factors and coordinates are computed?

Thanks a lot!

解决方案

My copy of this file has a division by 8000.0. Are you sure your copy says 4000.0?

float realDepth = depth / 8000.0;

Since right-shift by 3 is the same as division by 8, this is effectively the same as:

float realDepth = (depth >> 3) / 1000.0;

...but it is accomplished in one operation, which should be faster.

John
K4W Dev

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