unity 地形高度的获取和保存

Unity3d 保存和使用地形高度

TerrainHeightProcesser 地形高度存储工具

TerrainHeightData 地形高度数据

using UnityEngine;
using System.Collections;
using System.IO;
using UnityEditor;
using System.Collections.Generic;
 
/*
 * 地形高度处理器
 */
public class TerrainHeightProcesser : ScriptableWizard
{
 
    public int mapWdith;
    public int mapHeight;
 
 
    [MenuItem("Tools/Save Terrain Height File")]
    public static void OpenDialog()
    {
        DisplayWizard<TerrainHeightProcesser>("Save Terrain Height", "Save", "Cancel");
    }
 
    public void SaveTerrainHeightFile()
    {
 
        //以每米为间隔从高空向下发射射线
        Vector3 pos = Vector3.zero;
        pos.y = 100;
        Ray ray = new Ray(pos, -Vector3.up);
        Vector3 targetPos = Vector3.zero;
 
        //创建一个对象
        TerrainHeightData th = ScriptableObject.CreateInstance<TerrainHeightData>();
        th.MapWidth = mapWdith;
        th.MapHeight = mapHeight;
        th.List = new List<float>();
 
        //纵向
        for (short i = 0; i < mapHeight; i++)
        {
            pos.z = i;
            //横向
            for (short j = 0; j < mapWdith; j++)
            {
                targetPos = Vector3.zero;//默认zero
 
                pos.x = j;
                ray.origin = pos;
                RaycastHit result;
                if (Physics.Raycast(ray, out result))
                {
                    targetPos = result.point;
                }
                th.List.Add(targetPos.y);
            }
        }
         
        //计算file name
        string sceneName = UnityEditor.EditorApplication.currentScene;
        int start = sceneName.LastIndexOf('/') + 1;
        int count = sceneName.LastIndexOf('.')-start;
        sceneName = sceneName.Substring(start, count);
        string path = "Assets/ArtAsset/TerrainHeightData/" + sceneName + ".asset";
 
        //保存
        AssetDatabase.CreateAsset(th, path);
        AssetDatabase.Refresh();
 
        string str = string.Empty;
        str += "mapHeight=" + mapHeight.ToString() + "   ";
        str += "mapWdith=" + mapWdith.ToString();
        EditorUtility.DisplayDialog("SUCCESS", "file:" + path + "\n" + str, "OK");
    }
 
    void OnWizardCreate()
    {
        SaveTerrainHeightFile();
    }
 
    void OnWizardOtherButton()
    {
        Close();
    }
 
     
}

//TerrainHeightData

using UnityEngine;

using System.Collections;

using System.IO;

using System.Collections.Generic;



public class TerrainHeightData : ScriptableObject

{

    [SerializeField]

    public int MapWidth = 0;



    [SerializeField]

    public int MapHeight = 0;



    [SerializeField]

    public List<float> List;



    public float GetTerrainHeight(float x,float z)

    {

        int w = (int)Mathf.Floor(x);

        int h = (int)Mathf.Floor(z);

        if (w < 0 || w >= MapWidth || h < 0 || h >= MapHeight)

            return 0.0f;



        int idx = h*MapWidth+w;

        if (idx < 0 || idx >= MapWidth * MapHeight || idx >= List.Count)

            return 0.0f;



        return List[idx];

    }

}