Texture2D.GetPixel 获取像素颜色


function GetPixel (x : int, y : int) : Color

Description描述

Returns pixel color at coordinates (x, y).

从坐标（x,y）处返回一个像素的颜色

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

如果这个像素的坐标超出边界（大于这个纹理的宽/高或者小于0），那么它将会以纹理的循环模式为准进行限制或重复

If you are reading a large block of pixels from the texture, it may be faster  to use GetPixels which returns a whole block of pixel colors.

如果你需要从纹理上读取一大块像素，使用 GetPixels 可以更快的返回整块的像素颜色

The texture must have the Is Readable flag set in the import settings, otherwise this function will fail.  See Also: GetPixels, SetPixel, GetPixelBilinear.

这个纹理需要在导入设置里设置为Is   Readable（可读），否则此函数将会无效。

  • C#

  • JavaScript

using UnityEngine;using System.Collections;public class example : MonoBehaviour {public Texture2D heightmap;public Vector3 size = new Vector3(100, 10, 100);void Update() {int x = transform.position.x / size.x * heightmap.width;int z = transform.position.z / size.z * heightmap.height;transform.position.y = heightmap.GetPixel(x, z).grayscale * size.y;}}
// Sets the y coordinate of the transform to follow the heightmap//设置Y轴坐标的位置跟随高度图var heightmap : Texture2D;var size = Vector3(100, 10, 100);function Update () {var x : int = transform.position.x / size.x * heightmap.width;var z : int = transform.position.z / size.z * heightmap.height;transform.position.y = heightmap.GetPixel(x, z).grayscale * size.y;}



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