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bugfix:视差贴图，书写错误

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KimoriTama
2023-03-04 15:34:55 +08:00
committed by Gary Wang
parent ca85308f99
commit af3392c995
1 changed files with 3 additions and 3 deletions
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6
docs/05 Advanced Lighting/05 Parallax Mapping.md
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@@ -154,7 +154,7 @@ vec2 ParallaxMapping(vec2 texCoords, vec3 viewDir)
有些人更喜欢不在等式中使用viewDir.z，因为普通的视差贴图会在角度上产生不尽如人意的结果；这个技术叫做有偏移量限制的视差贴图（Parallax Mapping with Offset Limiting）。选择哪一个技术是个人偏好问题，但我倾向于普通的视差贴图。 有些人更喜欢不在等式中使用viewDir.z，因为普通的视差贴图会在角度上产生不尽如人意的结果；这个技术叫做有偏移量限制的视差贴图（Parallax Mapping with Offset Limiting）。选择哪一个技术是个人偏好问题，但我倾向于普通的视差贴图。
最后的纹理坐标随后被用来进行采样（diffuse和法线）贴图，下图所展示的位移效果中height_scale等于1： 最后的纹理坐标随后被用来进行采样（diffuse和法线）贴图，下图所展示的位移效果中height_scale等于0.1：
![](../img/05/05/parallax_mapping.png) ![](../img/05/05/parallax_mapping.png)
@@ -205,7 +205,7 @@ vec2 ParallaxMapping(vec2 texCoords, vec3 viewDir)
float currentLayerDepth = 0.0; float currentLayerDepth = 0.0;
// the amount to shift the texture coordinates per layer (from vector P) // the amount to shift the texture coordinates per layer (from vector P)
vec2 P = viewDir.xy * height_scale; vec2 P = viewDir.xy * height_scale;
float deltaTexCoords = P / numLayers; vec2 deltaTexCoords = P / numLayers;
[...] [...]
} }
@@ -230,7 +230,7 @@ while(currentLayerDepth < currentDepthMapValue)
currentLayerDepth += layerDepth; currentLayerDepth += layerDepth;
} }
return texCoords - currentTexCoords; return currentTexCoords;
``` ```