Texture2D.GetPixel

描述

返回坐标 (x, y) 上的像素颜色。

If the pixel coordinates are out of bounds (larger than width/height or smaller than 0), they will be clamped or repeated based on the texture's wrap mode.

纹理坐标从左下角开始。

如果您从纹理读取大像素块， 使用 GetPixels32 或 GetPixels 可能更快，它返回整块像素颜色。

Texture.isReadable must be true. GetPixel is not available on Textures using Crunch texture compression.

另请参阅：GetPixels32、GetPixels、SetPixel、GetPixelBilinear。

// Sets the y coordinate of the transform to follow the heightmap
using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour
{
    public Texture2D heightmap;
    public Vector3 size = new Vector3(100, 10, 100);

    void Update()
    {
        int x = Mathf.FloorToInt(transform.position.x / size.x * heightmap.width);
        int z = Mathf.FloorToInt(transform.position.z / size.z * heightmap.height);
        Vector3 pos = transform.position;
        pos.y = heightmap.GetPixel(x, z).grayscale * size.y;
        transform.position = pos;
    }
}