unity中用shader实现大海的特效

之前学过一个是做流水效果的

但是自我感觉效果不太好，波动太规律了，而且能看到上面的面像是由多个面组合成的，感觉有点假，不过功能是实现了。

using UnityEngine;
using System.Collections;

public class CreateWater : MonoBehaviour {

Mesh mesh;

    public int tier = 10;//长度分段
    public int length = 10;//长
    public int width = 3;//宽
    public int hight = 10;//高

    private Vector3[] vs;//顶点坐标
    private int[] ts;//顶点序列
    private Vector2[] newUVs;//UV贴图
    private Vector3[] newNormals;//法线

    void Update()
    {
        int temp = ((tier + 1) * 8 + 4) * 3;//确定顶点数量

        vs = new Vector3[temp];
        ts = new int[temp];
        newUVs = new Vector2[temp];
        newNormals = new Vector3[temp];

float dis = 2 * Mathf.PI / tier;//两段只差的横坐标

        int count = 0;
        for (int i = 0; i < tier; i++)
        {
            float pos1 = i * length / tier - length / 2;
            float pos2 = (i + 1) * length / tier - length / 2;
            //顶面顶点坐标
            vs[count] = new Vector3(pos1, Mathf.Sin(Time.time + i * dis), width);
            vs[count + 1] = new Vector3(pos2, Mathf.Sin(Time.time + (i + 1) * dis), -width);
            vs[count + 2] = new Vector3(pos1, Mathf.Sin(Time.time + i * dis), -width);

            vs[count + 3] = new Vector3(pos1, Mathf.Sin(Time.time + i * dis), width);
            vs[count + 4] = new Vector3(pos2, Mathf.Sin(Time.time + (i + 1) * dis), width);
            vs[count + 5] = new Vector3(pos2, Mathf.Sin(Time.time + (i + 1) * dis), -width);
            //顶面法线
            newNormals[count] = Vector3.Normalize(new Vector3(1, Mathf.Cos(Time.time + i * dis), 0));
            newNormals[count + 1] = Vector3.Normalize(new Vector3(1, Mathf.Cos(Time.time + (i + 1) * dis), 0));
            newNormals[count + 2] = Vector3.Normalize(new Vector3(1, Mathf.Cos(Time.time + i * dis), 0));

            newNormals[count + 3] = Vector3.Normalize(new Vector3(1, Mathf.Cos(Time.time + i * dis), 0));
            newNormals[count + 4] = Vector3.Normalize(new Vector3(1, Mathf.Cos(Time.time + (i + 1) * dis), 0));
            newNormals[count + 5] = Vector3.Normalize(new Vector3(1, Mathf.Cos(Time.time + (i + 1) * dis), 0));

            //前面顶点坐标
            vs[count + 6] = new Vector3(pos1, Mathf.Sin(Time.time + i * dis), -width);
            vs[count + 7] = new Vector3(pos2, -hight, -width);
            vs[count + 8] = new Vector3(pos1, -hight, -width);

            vs[count + 9] = new Vector3(pos1, Mathf.Sin(Time.time + i * dis), -width);
            vs[count + 10] = new Vector3(pos2, Mathf.Sin(Time.time + (i + 1) * dis), -width);
            vs[count + 11] = new Vector3(pos2, -hight, -width);
            //前面法线
            for (int j = 0; j < 6; j++)
            {
                newNormals[count + 6 + j] = Vector3.back;
            }
            //后面顶点坐标
            vs[count + 12] = new Vector3(pos1, Mathf.Sin(Time.time + i * dis), width);
            vs[count + 13] = new Vector3(pos1, -hight, width);
            vs[count + 14] = new Vector3(pos2, -hight, width);

            vs[count + 15] = new Vector3(pos1, Mathf.Sin(Time.time + i * dis), width);
            vs[count + 16] = new Vector3(pos2, -hight, width);
            vs[count + 17] = new Vector3(pos2, Mathf.Sin(Time.time + (i + 1) * dis), width);
            //后面法线
            for (int j = 0; j < 6; j++)
            {
                newNormals[count + 12 + j] = Vector3.forward;
            }
            //下面顶点坐标
            vs[count + 18] = new Vector3(pos1, -hight, width);
            vs[count + 19] = new Vector3(pos1, -hight, -width);
            vs[count + 20] = new Vector3(pos2, -hight, -width);

            vs[count + 21] = new Vector3(pos1, -hight, width);
            vs[count + 22] = new Vector3(pos2, -hight, -width);
            vs[count + 23] = new Vector3(pos2, -hight, width);
            //下面法线
            for (int j = 0; j < 6; j++)
            {
                newNormals[count + 18 + j] = Vector3.down;
            }

count += 24;
}

        //两侧顶点坐标及法线
        vs[vs.Length - 12] = new Vector3(-length / 2, Mathf.Sin(Time.time), width);
        vs[vs.Length - 11] = new Vector3(-length / 2, -hight, -width);
        vs[vs.Length - 10] = new Vector3(-length / 2, -hight, width);

        vs[vs.Length - 9] = new Vector3(-length / 2, Mathf.Sin(Time.time), width);
        vs[vs.Length - 8] = new Vector3(-length / 2, Mathf.Sin(Time.time), -width);
        vs[vs.Length - 7] = new Vector3(-length / 2, -hight, -width);

        for (int j = 0; j < 6; j++)
        {
            newNormals[vs.Length - 12 + j] = Vector3.left;
        }

        vs[vs.Length - 6] = new Vector3(length / 2, Mathf.Sin(Time.time + tier * dis), width);
        vs[vs.Length - 5] = new Vector3(length / 2, -hight, width);
        vs[vs.Length - 4] = new Vector3(length / 2, -hight, -width);

        vs[vs.Length - 3] = new Vector3(length / 2, Mathf.Sin(Time.time + tier * dis), width);
        vs[vs.Length - 2] = new Vector3(length / 2, -hight, -width);
        vs[vs.Length - 1] = new Vector3(length / 2, Mathf.Sin(Time.time + tier * dis), -width);

        for (int j = 0; j < 6; j++)
        {
            newNormals[vs.Length - 6 + j] = Vector3.right;
        }

        for (int i = 0; i < ts.Length; i++)
        {   //顶点序列赋值
            ts[i] = i;
        }

        mesh = new Mesh();
        GetComponent<MeshFilter>().mesh = mesh;
        mesh.vertices = vs;
        mesh.uv = newUVs;
        mesh.triangles = ts;
        mesh.normals = newNormals;
    }

}

原文链接：http://blog.csdn.net/qq_18408937/article/details/44161229

unity中用shader实现大海的特效

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