Can't figure out Lerp! Woodcutter not moving to detected tree.

Unity Engine
1

Hello there! Just messing around with Unity3d today and testing some things out.

I’m trying to make a simple script where an object (Woodcutter) will detect a tree within a certain range and then move from its position to the tree. This is what I got so far. https://pastebin.com/ZdrS5kHv - It starts working, looks for a tree, finds a tree, but when I expect it to move there using Lerp nothing happens. Not sure why this is. Hope someone can explain it to me :slight_smile: Thanks.

2

Your move script is called only while the woodcutter is not working and when a tree is found. So when it’s changed to working, the move script can no-longer be called.

1 Like
3

Yeah I eventually figured it out and got the script working and improved it a bit.
Now it works as expected, returns the wood to home and starts searching for a new tree nearby. Just gotta make a forester now to make sure new trees eventually pop up :wink:

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

public class WoodCutterDetector : MonoBehaviour
{
    public GameObject home;
    private GameObject tree;
    bool working = false;
    bool carryingTree = false;

    // Use this for initialization
    void Start()
    {

    }

    // Update is called once per frame
    void Update()
    {
        if (working)
        {
            if(!carryingTree) {
                MoveToTree(tree);
            } else {
                MoveHome ();
            }
        } else {
            GetTreeInRange();
        }
    }

    void MoveHome() {
        Vector3 homePosition = home.transform.position;
        Vector3 workerPosition = transform.position;

        transform.position = Vector3.Lerp(workerPosition, homePosition, 0.1f);

        if (Vector3.Distance(homePosition, workerPosition) <= 0.1f)
        {
            working = false;
            carryingTree = false;
        }
    }

    void MoveToTree(GameObject tree)
    {
        Vector3 treePosition = tree.transform.position;
        Vector3 workerPosition = transform.position;

        transform.position = Vector3.Lerp(workerPosition, treePosition, 0.1f);

        if (Vector3.Distance(treePosition, workerPosition) <= 0.1f)
        {
            Destroy(tree);
            tree = null;
            carryingTree = true;
        }
    }



    void GetTreeInRange()
    {
        GameObject[] trees = GameObject.FindGameObjectsWithTag("Tree");

        foreach (GameObject t in trees)
        {
            float distance = Vector3.Distance(t.transform.position, transform.position);

            if (distance <= 5f)
            {
                tree = t;
                working = true;
                return;
            }
        }
    }
}

Also have to improve the GetTreeInRange function a bit, so it looks for the closest, but that’s small details. Thanks for your answer :slight_smile: