OldBlueWater/BlueWater/Assets/02.Scripts/WaterAndShip/Gerstner wave/GerstnerWave.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class GerstnerWave : MonoBehaviour
{
    public float waveLength = 0.1f;
    public float amplitude = 0.1f;
    public float speed = 1f;
    public Vector2 direction = new Vector2(1.0f, 0.0f);

    public void Update()
    {
        Mesh mesh = GetComponent<MeshFilter>().mesh;
        Vector3[] vertices = mesh.vertices;

        float waveNumber = 2.0f * Mathf.PI / waveLength;
        float phaseConstant = speed * waveNumber;

        for (int i = 0; i < vertices.Length; i++)
        {
            Vector3 vertex = vertices[i];
            float dotProduct = Vector2.Dot(new Vector2(vertex.x, vertex.z), direction);
            float wavePhase = waveNumber * dotProduct + phaseConstant * Time.time;
            vertex.y = amplitude * Mathf.Sin(wavePhase);
            vertices[i] = vertex;
        }

        mesh.vertices = vertices;
        mesh.RecalculateNormals();
    }
}