Unity3D 动态改变地形

直接获取TerrainData进行修改即可

using System.Collections;

using UnityEngine;

using UnityEditor;

public class DynamicCreateTerrain : MonoBehaviour

{

    public TerrainData terrainData;

    private float[,] heightsBackups;

    void Start()

    {

        //var terrain = CreateTerrain();

        ModifyTerrainDataHeight(terrainData);

        // 5秒后恢复地形

        StartCoroutine(Disable());

    }

    // 动态创建地形

    public Terrain CreateTerrain()

    {

        TerrainData terrainData = new TerrainData();

        terrainData.heightmapResolution = ;

        terrainData.baseMapResolution = ;

        terrainData.size = new Vector3(, , );

        terrainData.alphamapResolution = ;

        terrainData.SetDetailResolution(, );

        GameObject obj = Terrain.CreateTerrainGameObject(terrainData);

        AssetDatabase.CreateAsset(terrainData, "Assets/Terrain_ModifyHeight.asset");

        AssetDatabase.SaveAssets();

        return obj.GetComponent<Terrain>();

    }

    // 动态改变地形

    public void ModifyTerrainDataHeight(TerrainData terrainData)

    {

        int width = terrainData.heightmapWidth;

        int height = terrainData.heightmapHeight;

        float[,] array = new float[width, height];

        print("width:" + width + " height:" + height);

        for (int i = ; i < width; i++)

            for (int j = ; j < height; j++)

            {

                float f1 = i;

                float f2 = width;

                float f3 = j;

                float f4 = height;

                float baseV = (f1 / f2 + f3 / f4) /  * ;

                array[i, j] = baseV * baseV;

            }

        // 备份高度图

        heightsBackups = terrainData.GetHeights(, , width, height);

        // 设置高度图

        terrainData.SetHeights(, , array);

    }

    IEnumerator Disable()

    {

        yield return new WaitForSeconds();

        Debug.Log("Recove Terrain.");

        terrainData.SetHeights(, , heightsBackups);

    }

}

需要注意的是，如果是在Editor模式下， 这样操作会直接修改TerrainData的数据，需要注意备份，不过打包完就没事，不会再被修改了。

这种做法可以动态改变地形，用来实现一些例如挖洞等的效果。

动态改变地形的插件：

https://www.assetstore.unity3d.com/cn/#!/content/65795