Unity Terrain Change - Real Time

Hi,

I've copied this from else well (beyond my technical knowledge!), but could someone help me add a 'max' variable to the height in which the player can increase/decrease the terrain?

There are other things i want to do like restrict where they can update terrain, but i think i can do that.

Code (csharp):

1.  
2. using UnityEngine;
3. using System.Collections;
4.  
5. public class tut_02_terrain : MonoBehaviour
6. {
7.     public Terrain myTerrain;
8.     int xResolution;
9.     int zResolution;
10.     float[,] heights;
11.    
12.     void Start()
13.     {
14.         xResolution = myTerrain.terrainData.heightmapWidth;
15.         zResolution = myTerrain.terrainData.heightmapHeight;
16.         heights = myTerrain.terrainData.GetHeights(0,0,xResolution,zResolution);
17.     }
18.    
19.     void Update()
20.     {
21.         if(Input.GetMouseButtonDown(0))
22.         {
23.             RaycastHit hit;
24.             Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
25.             if(Physics.Raycast(ray, out hit))
26.             {
27.                 raiseTerrain(hit.point);
28.             }
29.         }
30.         if(Input.GetMouseButtonDown(1))
31.         {
32.             RaycastHit hit;
33.             Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
34.             if(Physics.Raycast(ray, out hit))
35.             {
36.                 lowerTerrain(hit.point);
37.             }
38.         }
39.     }
40.    
41.     private void raiseTerrain(Vector3 point)
42.     {
43.         int terX =(int)((point.x / myTerrain.terrainData.size.x) * xResolution);
44.         int terZ =(int)((point.z / myTerrain.terrainData.size.z) * zResolution);
45.         float y = heights[terX,terZ];
46.         y += 0.001f;
47.         float[,] height = new float[1,1];
48.         height[0,0] = y;
49.         heights[terX,terZ] = y;
50.         myTerrain.terrainData.SetHeights(terX, terZ, height);
51.     }
52.    
53.     private void lowerTerrain(Vector3 point)
54.     {
55.         int terX =(int)((point.x / myTerrain.terrainData.size.x) * xResolution);
56.         int terZ =(int)((point.z / myTerrain.terrainData.size.z) * zResolution);
57.         float y = heights[terX,terZ];
58.         y -= 0.001f;
59.         float[,] height = new float[1,1];
60.         height[0,0] = y;
61.         heights[terX,terZ] = y;
62.         myTerrain.terrainData.SetHeights(terX, terZ, height);
63.     }
64. }
65.  

Thanks

 

Try this

PHP:

using UnityEngine;
using System.Collections;

public class tut_02_terrain : MonoBehaviour
{
    public Terrain myTerrain;
    public float maximumHeight = 100; // line added
    public float minimumHeight = 0; // line added
    int xResolution;
    int zResolution;
    float[,] heights;
    
    void Start()
    {
        xResolution = myTerrain.terrainData.heightmapWidth;
        zResolution = myTerrain.terrainData.heightmapHeight;
        heights = myTerrain.terrainData.GetHeights(0,0,xResolution,zResolution);
    }

    void Update()
    {
        if(Input.GetMouseButtonDown(0))
        {
            RaycastHit hit;
            Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
            if(Physics.Raycast(ray, out hit))
            {
                raiseTerrain(hit.point);
            }
        }
        if(Input.GetMouseButtonDown(1))
        {
            RaycastHit hit;
            Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
            if(Physics.Raycast(ray, out hit))
            {
                lowerTerrain(hit.point);
            }
        }
    }

    private void raiseTerrain(Vector3 point)
    {
        int terX =(int)((point.x / myTerrain.terrainData.size.x) * xResolution);
        int terZ =(int)((point.z / myTerrain.terrainData.size.z) * zResolution);
        float y = heights[terX,terZ];
        y = Mathf.Min(y + .001f, maximumHeight / myTerrain.terrainData.size.y); // line changed
        float[,] height = new float[1,1];
        height[0,0] = y;
        heights[terX,terZ] = y;
        myTerrain.terrainData.SetHeights(terX, terZ, height);
    }

    private void lowerTerrain(Vector3 point)
    {
        int terX =(int)((point.x / myTerrain.terrainData.size.x) * xResolution);
        int terZ =(int)((point.z / myTerrain.terrainData.size.z) * zResolution);
        float y = heights[terX,terZ];
        y = Mathf.Max(y - .001f, minimumHeight / myTerrain.terrainData.size.y); // line changed
        float[,] height = new float[1,1];
        height[0,0] = y;
        heights[terX,terZ] = y;
        myTerrain.terrainData.SetHeights(terX, terZ, height);
    }
}

 

Thanks, that's great.

Works perfectly

Thanks again