AssetPostprocessor.OnPostprocessTexture(Texture3D)

描述

将此函数添加到子类中，以便在 Unity 压缩 3D 纹理之前，在纹理 3D 完成导入后收到通知。

您目前无法选择压缩格式。如果您想根据纹理的文件名或其他属性更改压缩格式，请使用 AssetPostprocessor.OnPreprocessTexture。

但是，如果您以这种方式修改 TextureImporter 设置，它不会对 Unity 当前正在导入的纹理产生影响，但它会在 Unity 下次导入此纹理时应用。这会导致不可预测的结果。

using UnityEditor;
using UnityEngine;
using System.Collections;

// Postprocesses all 3D textures that are placed in a folder
// "invert color" to have their colors inverted.
public class InvertColor : AssetPostprocessor
{
    void OnPostprocessTexture3D(Texture3D texture)
    {
        // Only post process 3D textures if they are in a folder
        // "invert color" or a sub folder of it.
        string lowerCaseAssetPath = assetPath.ToLower();
        if (lowerCaseAssetPath.IndexOf("/invert color/") == -1)
            return;

        for (int m = 0; m < texture.mipmapCount; m++)
        {
            Color[] c = texture.GetPixels(m);

            for (int i = 0; i < c.Length; i++)
            {
                c[i].r = 1 - c[i].r;
                c[i].g = 1 - c[i].g;
                c[i].b = 1 - c[i].b;
            }
            texture.SetPixels(c, m);
        }
        // Instead of setting pixels for each mipmap level, you can modify
        // the pixels in the highest mipmap then use texture.Apply(true);
        // to generate lower mip levels.
    }
}