AssetPostprocessor.OnPostprocessCubemap(Cubemap)

描述

将此函数添加到一个子类中，以在立方体贴图纹理完成导入之前获取通知。

注意，应避免以这种方式修改 TextureImporter 设置，因为这对当前导入的纹理无效，但会在下次导入纹理时应用。这种行为具有不确定性，因此不建议使用。

using UnityEditor;
using UnityEngine;
using System.Collections;

// Postprocesses all cubemaps that are placed in a folder
// Here we just halve the texels values
public class ProcessCubemap : AssetPostprocessor
{
    void OnPostprocessCubemap(Cubemap texture)
    {
        string lowerCaseAssetPath = assetPath.ToLower();
        if (lowerCaseAssetPath.IndexOf("/postprocessedcubemaps/") == -1)
            return;

        for (int m = 0; m < texture.mipmapCount; m++)
        {
            for (int face = 0; face < 6; face++)
            {
                CubemapFace f = (CubemapFace)face;
                Color[] c = texture.GetPixels(f, m);

                for (int i = 0; i < c.Length; i++)
                {
                    c[i].r = c[i].r * 0.5f;
                    c[i].g = c[i].g * 0.5f;
                    c[i].b = c[i].b * 0.5f;
                }

                texture.SetPixels(c, f, m);
            }
            // Instead of setting pixels for each mipmap level, you can also
            // modify only the pixels in the highest mip level. And then simply use
            // texture.Apply(true); to generate lower mip levels.
        }
    }
}