Texture2D.GetPixelBilinear

Description

Returns filtered pixel color at normalized coordinates (u, v).

Coordinates u and v go from 0.0 to 1.0, just like UV coordinates in meshes. If coordinates are out of bounds (larger than 1.0 or smaller than 0.0), they will be clamped or repeated based on the texture's wrap mode.

Texture coordinates start at lower left corner. UV of (0,0) lands exactly on the bottom left texel; and UV of ((width-1)/width, (height-1)/height) lands exactly on the top right texel.

Returned pixel color is bilinearly filtered.

The texture must have the Read/Write Enabled flag set in the import settings, otherwise this function will fail.

See Also: GetPixel.

using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour {
    public Texture2D sourceTex;
    public float warpFactor = 1.0F;
    private Texture2D destTex;
    private Color[] destPix;
    void Start() {
        destTex = new Texture2D(sourceTex.width, sourceTex.height);
        destPix = new Color[destTex.width * destTex.height];
        int y = 0;
        while (y < destTex.height) {
            int x = 0;
            while (x < destTex.width) {
                float xFrac = x * 1.0F / (destTex.width - 1);
                float yFrac = y * 1.0F / (destTex.height - 1);
                float warpXFrac = Mathf.Pow(xFrac, warpFactor);
                float warpYFrac = Mathf.Pow(yFrac, warpFactor);
                destPix[y * destTex.width + x] = sourceTex.GetPixelBilinear(warpXFrac, warpYFrac);
                x++;
            }
            y++;
        }
        destTex.SetPixels(destPix);
        destTex.Apply();
        GetComponent<Renderer>().material.mainTexture = destTex;
    }
}

See Also: GetPixel.