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fix issue:高级光照(阴影，法线贴图，视差贴图)问题汇总(翻译错误，图片链接缺失...) #276

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superao
2024-01-11 12:19:13 +08:00
parent d0fe0d24d2
commit 65ac084c06
4 changed files with 15 additions and 18 deletions
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14
docs/05 Advanced Lighting/03 Shadows/02 Point Shadows.md
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@@ -122,17 +122,17 @@ glm::mat4 shadowProj = glm::perspective(glm::radians(90.0f), aspect, near, far);
```c++
std::vector<glm::mat4> shadowTransforms;
shadowTransforms.push_back(shadowProj *
glm::lookAt(lightPos, lightPos + glm::vec3(1.0,0.0,0.0), glm::vec3(0.0,-1.0,0.0));
glm::lookAt(lightPos, lightPos + glm::vec3(1.0,0.0,0.0), glm::vec3(0.0,-1.0,0.0)));
shadowTransforms.push_back(shadowProj *
glm::lookAt(lightPos, lightPos + glm::vec3(-1.0,0.0,0.0), glm::vec3(0.0,-1.0,0.0));
glm::lookAt(lightPos, lightPos + glm::vec3(-1.0,0.0,0.0), glm::vec3(0.0,-1.0,0.0)));
shadowTransforms.push_back(shadowProj *
glm::lookAt(lightPos, lightPos + glm::vec3(0.0,1.0,0.0), glm::vec3(0.0,0.0,1.0));
glm::lookAt(lightPos, lightPos + glm::vec3(0.0,1.0,0.0), glm::vec3(0.0,0.0,1.0)));
shadowTransforms.push_back(shadowProj *
glm::lookAt(lightPos, lightPos + glm::vec3(0.0,-1.0,0.0), glm::vec3(0.0,0.0,-1.0));
glm::lookAt(lightPos, lightPos + glm::vec3(0.0,-1.0,0.0), glm::vec3(0.0,0.0,-1.0)));
shadowTransforms.push_back(shadowProj *
glm::lookAt(lightPos, lightPos + glm::vec3(0.0,0.0,1.0), glm::vec3(0.0,-1.0,0.0));
glm::lookAt(lightPos, lightPos + glm::vec3(0.0,0.0,1.0), glm::vec3(0.0,-1.0,0.0)));
shadowTransforms.push_back(shadowProj *
glm::lookAt(lightPos, lightPos + glm::vec3(0.0,0.0,-1.0), glm::vec3(0.0,-1.0,0.0));
glm::lookAt(lightPos, lightPos + glm::vec3(0.0,0.0,-1.0), glm::vec3(0.0,-1.0,0.0)));
```
这里我们创建了6个视图矩阵，把它们乘以投影矩阵，来得到6个不同的光空间变换矩阵。glm::lookAt的target参数是它注视的立方体贴图的面的一个方向。
@@ -327,7 +327,7 @@ float ShadowCalculation(vec3 fragPos)
}
```
在这里，我们得到了fragment的位置与光的位置之间的不同的向量，使用这个向量作为一个方向向量去对立方体贴图进行采样。方向向量不需要是单位向量，所以无需对它进行标准化。最后的closestDepth是光源和它最接近的可见fragment之间的标准化的深度值。
在这里，我们得到了fragment的位置与光的位置之间的差向量，使用这个向量作为一个方向向量去对立方体贴图进行采样。方向向量不需要是单位向量，所以无需对它进行标准化。最后的closestDepth是光源和它最接近的可见fragment之间的标准化的深度值。
closestDepth值现在在0到1的范围内了，所以我们先将其转换回0到far_plane的范围，这需要把他乘以far_plane：