unity 代码创建纹理_unity 动态创建纹理

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
 
public class CreatTexture : MonoBehaviour
{
 
    public Color color1 = new Color();
    public Color color2 = new Color();
    public Color color;
    public float dis = 2;
    public bool pixelx = false;
    //纹理的宽高
    public int widthHeight = 512;
    //程序生成的纹理
    public Texture2D generaterdTexture;
 
    private Material currentMaterial;
    private Vector2 centerPosition;
    public float a;
    private void Start()
    {
        if (!currentMaterial)
        {
            currentMaterial = transform.GetComponent<Renderer>().sharedMaterial;
            if (!currentMaterial)
            {
                Debug.LogWarning("Cannot find a material on : " + transform.name);
            }
        }
        SetTex();
    }
 
    private void Update()
    {
        SetTex();
    }
 
    private void SetTex()
    {
        if (currentMaterial)
        {
            generaterdTexture = GenerateParabola();
            //设置纹理
            currentMaterial.SetTexture("_WaterTex", generaterdTexture);
        }
    }
 
    private Texture2D GenerateParabola()
    {       
        //创建一个新的纹理
        Texture2D proceduralTexture = new Texture2D(widthHeight, widthHeight);
        //获取当前纹理的中心点
        //Vector2 centerPixelPosition = centerPosition * widthHeight;
        //循环遍历纹理的宽高 , 来为每个像素点赋值
        for (int x = 0; x < widthHeight; x++)
        {
            a = x % dis;
            if (x % dis == 0)
            {
                pixelx = !pixelx;
            }
            for (int y = 0; y < widthHeight; y++)
            {
                //Vector2 currentPosition = new Vector2(x, y);
                //float pixelDistance = currentPosition.x - centerPixelPosition.x;
 
                if (pixelx)
                {
                    color = Color.Lerp(color1, color2, a/dis );
                    proceduralTexture.SetPixel(x, y, color);
                }
                else
                {
                    color = Color.Lerp(color1, color2, 1-(a/dis ));
                    proceduralTexture.SetPixel(x, y, color);
                }
                //当前像素点到中心点的距离 / 纹理宽高的一半
                //float pixelDistance = Vector2.Distance(currentPosition, centerPixelPosition) / (widthHeight * 0.5f);
 
                // Mathf.Abs : 取绝对值 Mathf.Clamp 0-1
                //pixelDistance = Mathf.Abs(1 - Mathf.Clamp(pixelDistance, 0f, 1f));
                //pixelDistance = (Mathf.Sin(pixelDistance * 30.0f) * pixelDistance);
 
                //以中心为原点 获取到当前像素点的向量
                //Vector2 pixelDirection = centerPixelPosition - currentPosition;
                //pixelDirection.Normalize();
 
                //当前像素点向量 和 上左右三个方向的向量之间的夹角
                //float rightDirection = Vector2.Angle(pixelDirection, Vector3.right) / 360;
                //float leftDirection = Vector2.Angle(pixelDirection, Vector3.left) / 360;
                //float upDirection = Vector2.Angle(pixelDirection, Vector3.up) / 360;
 
                //确保像素点的颜色值在 (0,1) 之间
                //Color pixelColor = new Color(pixelDistance, pixelDistance, pixelDistance, 1.0f);
                //Color pixelColor = new Color(rightDirection, leftDirection, upDirection, 1.0f);
                //proceduralTexture.SetPixel(x, y, pixelColor);
 
                //将中间的像素点设置成红色
                //if (x == widthHeight / 2 || y == widthHeight / 2)
                //{
                //    Color middlePixelColor = new Color(1, 0, 0, 1.0f);
                //    proceduralTexture.SetPixel(x, y, middlePixelColor);
                //}
            }
        }
        proceduralTexture.Apply();
        return proceduralTexture;
    }
}