Texture2D纹理蒙皮

1.需求

在一层特殊纹理基础上蒙皮另一张纹理。只要采用像素相乘既可以实现。

2.实现

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;

[ExecuteInEditMode]
public class TextureCreator : MonoBehaviour
{
    public Texture2D t2d;
    public Texture2D mask;
    public RawImage rawImage;

    private int width;
    private int height;

    private void CreateT2d()
    {
        width = t2d.width;
        height = t2d.height;

        Texture2D createdT2d = new Texture2D(width, height);
        Color[] colors = new Color[width * height];
        float offset = 100;

        for (int i = 0; i < width; i++)
        {
            for (int j = 0; j < height; j++)
            {
                int index = i * width + j;
                //底色，随便计算的
                Color createdColor = new Color((i + offset) / 255, (j + offset) / 255, 0);
                //形状纹理采样
                Color t2dColor = t2d.GetPixel(i, j);
                 //蒙皮纹理
                Color maskColor = mask.GetPixel(i, j);
                //合成主纹理
                colors[index] =createdColor *  t2dColor * maskColor;
            }
        }

        createdT2d.SetPixels(colors);
        createdT2d.Apply();
        rawImage.texture = createdT2d;
    }

	void Start ()
    {
        CreateT2d();
    }
}