using UnityEngine;
using System.Collections;
using System.Collections.Generic;
using System;
public class TreeChop : MonoBehaviour
{
public GameObject FallingTreePrefab;
private List TreeInstances;
// Use this for initialization
private void Start()
{
TreeInstances = new List(Terrain.activeTerrain.terrainData.treeInstances);
Debug.Log("Tree Instances:" + TreeInstances.Count);
}
// Update is called once per frame
private void Update()
{
// did we click on a tree?
if (Input.GetMouseButtonDown(0))
{
DateTime start = DateTime.Now;
RaycastHit hit;
// This ray will see where we clicked er chopped
Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
// Did we hit anything at that point, out as far as 10 units?
if (Physics.Raycast(ray, out hit, 10.0f))
{
// Did we even click er chop on the terrain/tree?
if (hit.collider.name != Terrain.activeTerrain.name)
{
// No, must have been a frantic attack on a giant spider >:)
return;
}
// We hit the "terrain"! Now, how high is the ground at that point?
float sampleHeight = Terrain.activeTerrain.SampleHeight(hit.point);
// If the height of the exact point we clicked/chopped at or below ground level, all we did
// was chop dirt.
if (hit.point.y <= sampleHeight + 0.01f)
{
return;
}
TerrainData terrain = Terrain.activeTerrain.terrainData;
TreeInstance[] treeInstances = terrain.treeInstances;
// Our current closest tree initializes to far away
float maxDistance = float.MaxValue;
// Track our closest tree's position
Vector3 closestTreePosition = new Vector3();
// Let's find the closest tree to the place we chopped and hit something
int closestTreeIndex = 0;
for (int i = 0; i < treeInstances.Length; i++)
{
TreeInstance currentTree = treeInstances[i];
// The the actual world position of the current tree we are checking
Vector3 currentTreeWorldPosition = Vector3.Scale(currentTree.position, terrain.size) + Terrain.activeTerrain.transform.position;
// Find the distance between the current tree and whatever we hit when chopping
float distance = Vector3.Distance(currentTreeWorldPosition, hit.point);
// Is this tree even closer?
if (distance < maxDistance)
{
maxDistance = distance;
closestTreeIndex = i;
closestTreePosition = currentTreeWorldPosition;
}
}
// Remove the tree from the terrain tree list
TreeInstances.RemoveAt(closestTreeIndex);
terrain.treeInstances = TreeInstances.ToArray();
// Now refresh the terrain, getting rid of the darn collider
float[,] heights = terrain.GetHeights(0, 0, 0, 0);
terrain.SetHeights(0, 0, heights);
// Put a falling tree in its place
Instantiate(FallingTreePrefab, closestTreePosition, Quaternion.identity);
Debug.Log(DateTime.Now - start);
}
}
}
}
Now, when i click on the tree it freeze on 1-3 sec. Someone know how can i remove this freeze ? ;/ I could place trees manually, but map is too large for this.
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