返回坐标 (x, y) 上的像素颜色。
如果这些像素坐标超出边界(大于宽度/高度或小于 0),
则将被限制或者将根据该纹理的包裹模式进行重复。
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。
该纹理必须在 texture import settings 中设置 read/write enabled 标志,否则此函数将失败。在使用 Crunch 纹理压缩的纹理上,GetPixel 不可用。
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; } }
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