Unity Script Reference – Texture2D.GetPixel

Texture2D.GetPixel

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

Description

Returns pixel color at coordinates (x, y).

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.

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.

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

JavaScript

// Sets the y coordinate of the transform to follow the heightmap

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;
}

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;
    }
}

import UnityEngine
import System.Collections

class example(MonoBehaviour):

    public heightmap as Texture2D

    public size as Vector3 = Vector3(100, 10, 100)

    def Update():
        x as int = ((transform.position.x / size.x) * heightmap.width)
        z as int = ((transform.position.z / size.z) * heightmap.height)
        transform.position.y = (heightmap.GetPixel(x, z).grayscale * size.y)