mirrors/LearnOpenGL-CN
1
0
Fork 0
mirror of https://github.com/LearnOpenGL-CN/LearnOpenGL-CN.git synced 2025-08-23 04:35:28 +08:00
Code Activity

更新“深度测试”中源代码的变量名和注释

Browse Source
This commit is contained in:
1i9h7_b1u3
2025-01-15 21:57:26 +08:00
parent 8dee669152
commit 0256023f8f
1 changed files with 4 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
docs/04 Advanced OpenGL/01 Depth testing.md
View File

@@ -136,13 +136,13 @@ void main()
首先我们将深度值变换为NDC，不是非常困难：
```c++
float z = depth * 2.0 - 1.0;
float ndc = depth * 2.0 - 1.0;
```
接下来使用获取到的z值，应用逆变换来获取线性的深度值：
接下来使用获取到的NDC值，应用逆变换来获取线性的深度值：
```c++
float linearDepth = (2.0 * near * far) / (far + near - z * (far - near));
float linearDepth = (2.0 * near * far) / (far + near - ndc * (far - near));
```
这个方程是用投影矩阵推导得出的，它使用了方程2来非线性化深度值，返回一个<var>near</var>与<var>far</var>之间的深度值。这篇注重数学的[文章](http://www.songho.ca/opengl/gl_projectionmatrix.html)为感兴趣的读者详细解释了投影矩阵，它也展示了这些方程是怎么来的。
@@ -158,7 +158,7 @@ float far = 100.0;
float LinearizeDepth(float depth)
{
float z = depth * 2.0 - 1.0; // back to NDC
float z = depth * 2.0 - 1.0; // 转换为 NDC
return (2.0 * near * far) / (far + near - z * (far - near));
}