MeshLab法线贴图

Question

在之前的（1.3.3）Meshlab版本中，当选择Render->shaders->normalmap时，常见的蓝紫色调的法线贴图会显示正确的法线贴图： 在当前的（2016.12）版本中，只显示纹理覆盖，没有显示法线贴图： 如何在当前版本中显示法线色彩地图？

- Mercury

Answer 1

尽管在Render -> Shaders菜单下有一个预定义的着色器“normalmap”可用，但它不会呈现您认为它应该呈现的模型（“熟悉的蓝紫色映射”）。

但是您可以修改这些着色器以实现您想要的效果。

1. Take a back up of the following files. You can find them in C:\Program Files\VCG\MeshLab\shaders or wherever you have installed meshlab

   • normalmap.vert
   • normalmap.frag

2. Edit the above files as follows. You can keep the comments.

   • normalmap.vert

     varying vec4 baseColor;
     void main(void)
     {
         gl_Position = ftransform();
         baseColor = vec4(gl_Normal, 1.0);
     }
     

   • normalmap.frag

     varying vec4 baseColor;
     void main(void)
     {
         gl_FragColor = baseColor;
     }
     

3. From Render menu, select Render -> Shaders -> normalmap.gdp

   

4. There you go! But remember this is a very simple shader to show normal map. If you want lighting and other effects you have to further edit the shaders.

- Atekihcan

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Ubuntu 22.04：/usr/share/meshlab/shaders/ - Remy Mellet