Texture2D.GetPixelBilinear

Description

正規化座標(u,v)でフィルタリングされたピクセルのカラーを取得します

メッシュのUV座標と同じように、v と v 、 0.0 から 1.0 の範囲を座標とします。 座標が境界を超えた場合(1.0よりも大きく、または0.0より小さく)、 テクスチャのラップモードに基づいてクランプされるかリピートされます。 返ったピクセルカラーは bilinearly filtered されます。 テクスチャはインポートセッティングのRead/Write Enabledフラグを設定しなくてはいけません。でなければこのファンクションは失敗するでしょう。

	// "Warp" a texture by squashing its pixels to one side.
	// This involves sampling the image at non-integer pixel
	// positions to ensure a smooth effect.
	
	// Source image.
	var sourceTex: Texture2D;
	
	// Amount of "warping".
	var warpFactor = 1.0;
	
	private var destTex: Texture2D;
	private var destPix: Color[];
	
	
	function Start () {
		// Set up a new texture with the same dimensions as the original.
		destTex = new Texture2D(sourceTex.width, sourceTex.height);
		destPix = new Color[destTex.width * destTex.height];
		
		// For each pixel in the destination texture...
		for (var y = 0; y < destTex.height; y++) {
			for (var x = 0; x < destTex.width; x++) {
				// Calculate the fraction of the way across the image
				// that this pixel positon corresponds to.
				var xFrac = x * 1.0 / (destTex.width - 1);
				var yFrac = y * 1.0 / (destTex.height - 1);
				
				// Take the fractions (0..1)and raise them to a power to apply
				// the distortion.
				var warpXFrac = Mathf.Pow(xFrac, warpFactor);
				var warpYFrac = Mathf.Pow(yFrac, warpFactor);
				
				// Get the non-integer pixel positions using GetPixelBilinear.
				destPix[y * destTex.width + x] = sourceTex.GetPixelBilinear(warpXFrac, warpYFrac);
			}
		}
		
		// Copy the pixel data to the destination texture and apply the change.
		destTex.SetPixels(destPix);
		destTex.Apply();
		
		// Set our object's texture to the newly warped image.
		renderer.material.mainTexture = destTex;
	}

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();
        renderer.material.mainTexture = destTex;
    }
}

import UnityEngine
import System.Collections

public class ExampleClass(MonoBehaviour):

	public sourceTex as Texture2D

	public warpFactor as float = 1.0F

	private destTex as Texture2D

	private destPix as (Color)

	def Start() as void:
		destTex = Texture2D(sourceTex.width, sourceTex.height)
		destPix = array[of Color]((destTex.width * destTex.height))
		y as int = 0
		while y < destTex.height:
			x as int = 0
			while x < destTex.width:
				xFrac as float = ((x * 1.0F) / (destTex.width - 1))
				yFrac as float = ((y * 1.0F) / (destTex.height - 1))
				warpXFrac as float = Mathf.Pow(xFrac, warpFactor)
				warpYFrac as float = Mathf.Pow(yFrac, warpFactor)
				destPix[((y * destTex.width) + x)] = sourceTex.GetPixelBilinear(warpXFrac, warpYFrac)
				x++
			y++
		destTex.SetPixels(destPix)
		destTex.Apply()
		renderer.material.mainTexture = destTex

See Also: GetPixel.