通过柏林噪声算法生成地图并且生成配套的小地图加滚轮缩放和位置显示

 

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

public class CreatMaps : MonoBehaviour
{
public int w = 100;
public int h = 100;
//public Image ima;
public Texture2D texture;//
public Color tu = Color.yellow;
public Color shui = Color.blue;
public Image playeriamge;
public GameObject player;
public Image map;
// Start is called before the first frame update
void Start()
{
texture = new Texture2D(w, h);
VertexHelper vh = new VertexHelper();
for (int x = 0; x < w; x++)
{
for (int z = 0; z < h; z++)
{
float y = Mathf.PerlinNoise(x * 0.1f, z * 0.1f);
float uvx = (float)x / (float)(w - 1);
float uvy = (float)z / (float)(h - 1);
Color color = Color.Lerp(tu, shui, y);
texture.SetPixel(x, z, color);
vh.AddVert(new Vector3(x-w/2, y * 10, z-h/2), Color.white, new Vector2(uvx, uvy));
if (x != w - 1 && z != h - 1)
{
vh.AddTriangle(x * h + z, x * h + z + 1, (x + 1) * h + z + 1);
vh.AddTriangle(x * h + z, (x + 1) * h + z + 1, (x + 1) * h + z);
}
if (Random.Range(0,100) >= 99)
{
GameObject tree = Instantiate(Resources.Load<GameObject>("Tree"+Random.Range(11,201)),transform);
tree.transform.position = new Vector3(x - w / 2, y * 10, z - h / 2);
}
}
}
texture.Apply();
Mesh mesh = new Mesh();
vh.FillMesh(mesh);
GetComponent<MeshFilter>().mesh = mesh;
GetComponent<MeshCollider>().sharedMesh = mesh;
Material material = new Material(Shader.Find("UI/Default"));
material.mainTexture = texture;
GetComponent<MeshRenderer>().material = material;
map.material = material;
}

// Update is called once per frame
void Update()
{
float pivotx = (player.transform.position.x + w / 2) / (float)w;
float pivoty = (player.transform.position.z + h / 2) / (float)h;
map.rectTransform.pivot = new Vector2(pivotx, pivoty);
playeriamge.rectTransform.eulerAngles = Vector3.back * player.transform.eulerAngles.y;
if ((map.rectTransform.localScale + Vector3.one * Input.GetAxis("Mouse ScrollWheel")).x>= 1)
{
map.rectTransform.localScale += Vector3.one * Input.GetAxis("Mouse ScrollWheel");
}
}
}