Unity Note - Project11 Wave2
按照上次的设想：
效果还不错
加了几个，调下参数
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| using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class WaveCreator : MonoBehaviour
{
[SerializeField] private int waveLength = 100; // length of wave
[SerializeField] private float segLen = 0.2f; // length of each segment
[SerializeField] private float samplingInterval = 20f;
[SerializeField] private float maxHeight = 10f;
[SerializeField] private string colorHex = "#45b787";
[SerializeField] private float colorAlpha = 0.8f;
private Color waveColor;
private float seedX = 0;
private float seedY = 0;
void Start()
{
// generate random seed
seedX = Random.value * 100f;
seedY = Random.value * 100f;
// set material
GetComponent<MeshRenderer>().material = InitMaterial();
}
void Update() {
float[] arr = GenerateNoiseArray(waveLength);
DrawWave(arr);
}
private float[] GenerateNoiseArray(int len){
// generate wave height array
float[] arr = new float[len];
for(int i=0; i<arr.Length; i++){
float x = (i + seedX + Time.time) / samplingInterval;
float y = (i + seedY) / samplingInterval;
// noise between 0.0 and 1.0
arr[i] = Mathf.PerlinNoise(x, y) * maxHeight;
}
return arr;
}
private void DrawWave(float[] arr){
int n = arr.Length;
Vector3[] vertices = new Vector3[2*n];
List<int> triangleList = new List<int>();
// add vertices
for(int i=0; i<n; i++){
vertices[2*i] = new Vector3(segLen*(i+1), 0, 0);
vertices[2*i + 1] = new Vector3(segLen*(i+1), arr[i], 0);
}
// add triangles
for(int i=0;i<n-1;i++){
// clockwise order
triangleList.Add(2*i);
triangleList.Add(2*i + 1);
triangleList.Add(2*i + 2);
triangleList.Add(2*i + 2);
triangleList.Add(2*i + 1);
triangleList.Add(2*i + 3);
}
int[] triangles = triangleList.ToArray();
// get mesh
Mesh mesh = GetComponent<MeshFilter>().mesh;
// clear original mesh
mesh.Clear();
// set new vertices
mesh.vertices = vertices;
// set new triangles
mesh.triangles = triangles;
// calculate mesh
mesh.RecalculateNormals();
}
private Material InitMaterial(){
Material material = new Material(Shader.Find("Standard"));
// set rendering mode
SetFade(material);
// set color
ColorUtility.TryParseHtmlString(colorHex, out waveColor);
waveColor.a = colorAlpha;
material.SetColor("_Color", waveColor);
return material;
}
private void SetFade(Material material){
// set rendering mode to fade to show alpha
material.SetInt("_SrcBlend", (int)UnityEngine.Rendering.BlendMode.SrcAlpha);
material.SetInt("_DstBlend", (int)UnityEngine.Rendering.BlendMode.OneMinusSrcAlpha);
material.SetInt("_ZWrite", 0);
material.DisableKeyword("_ALPHATEST_ON");
material.EnableKeyword("_ALPHABLEND_ON");
material.DisableKeyword("_ALPHAPREMULTIPLY_ON");
material.renderQueue = 3000;
}
}
|
