Linear Translation

Questions & Answers
1

i have three point A,B, C. B is in between A and C. i want to move object from B to C then C to A and then A to B, how we can do.

2

I suggest you use Vector3.Lerp The Lerp function has 3 parameters, a startPos and endPos if you will. The third parameter is a float (between 0 and 1) that will control the position. If you have a value of 0, the startPos will be used, and 1 will return the endPos. All the values in between are interpolated by lerp, so all you need to do is to animate your progress-parameter to move your object between points.

I would recommend you to have a look at Coroutines to make this more easy for you. You can then easily animate your different sections: B->C, C->A, A->B

IEnumerator MoveObject(Vector3 startPos, Vector3 endPos)
    {
        float progress = 0.0f;
        float speed = 0.5f;

        while (progress < 1.0f)
        {
            _ObjectToMove.transform.position = Vector3.Lerp(startPos, endPos, progress);

            yield return new WaitForEndOfFrame();
            progress += Time.deltaTime*speed;
        }

        _ObjectToMove.transform.position = endPos;
    }

This is an example coroutine, which can be used to individually animate your movement.
Cheers :wink:

3

Lerp is what you want basically for movement and arrays/lists for storing the path nodes. http://docs.unity3d.com/Documentation/ScriptReference/Vector3.Lerp.html Here’s a script that should help clarify what you need to do:

using UnityEngine;
using System.Collections;

public class FollowPath : MonoBehaviour {
	
	public GameObject follower;
	public Transform[] pathNodes;
	public float movementSpeed = 0.5f;
	public bool continuouslyLoop = false;
	private float pathPosition = 0f;
	private int curNode = 0;
	
	// Use this for initialization
	void Start () { 
		if (follower == null) {
			follower = this.gameObject;
		}
	} 
	
	// Update is called once per frame
	void Update () {
		if (pathNodes != null)
		{
			pathPosition += Time.deltaTime * movementSpeed;
			if (pathPosition > 1f)
			{
				if (pathNodes.Length > curNode+2)
				{
					pathPosition = 0f;
					curNode += 1;
				}
				else
				{
					if (continuouslyLoop) 
					{
						pathPosition = 0f;
						curNode = 0;
					}
				}
			}
			follower.transform.position = Vector3.Lerp( pathNodes[curNode].position, pathNodes[curNode+1].position, pathPosition );
		}
	}
}