【Terrain x Perlin】用Perlin Noise

GENERATING TERRAIN in Unity - Procedural Generation Tutorial

比较老的视频，使用Terrain中设置perlinNoise来制作生成地形

using UnityEngine;

public class TerrainGenerator: MonoBehaviour {
  
  public int depth = 20;
  public int width = 256;
  public int height = 256;

  public float scale = 20;
  public float offsetX=100f;
  public float offsetY = 100f;

  void Start()
  {
    offsetX = Random.Range(0f,9999f);
    offsetY = Random.Range(0f,9999f);
  }

  //可以改成update用于测试
  void Update()
  {
    Terrain ter = GetComponent<Terrian>();
    ter.terrainData = GenerateTerrain(ter.terrainData);

    //可以有波纹
    offsetX += Time.deltaTime*5f;
  }
  
  TerrainData GenerateTerrain(TerrainData terrainData)
  {
    terrainData.heightmapResolution = width +1;

    terrainData.size = new Vector3(width, depth, height);
    terrainData.SetHeights(0,0,GenerateHeights());
    return terrainData;
  }


  float[,] GenerateHeights()
  {
    float[,] heights = new float[width,height];
    for (int x = 0; x<width; x++)
    {
      for(int y = 0; y <height; y ++)
        {
          heights[x,y] = CalculateHeight(x,y);
        }
    }
  return heights;
  }

  float CalculateHiegh(int x, int y )
  {
    //这边要记得转换float
    float xCoord = (float)x / width*scale+offsetX;
    float yCoord = (float)y / height*scale+offsetY;

    return Mathf.PerlinNoise(xCoord,yCoord);
  }

}