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Question by JD · Nov 04, 2012 at 03:09 PM · javascriptpositionvector3lerpmove

Vector3.lerp doesn't work

Hi Everyone,

I'm just starting to learn Unity and I don't understand why this code doesn't work. i would create a cube and move it. The code run correctly but my cube doesn't move.

Thank you for your help

Julien

My code:

 var cube;
 var end : Transform;
 
 function Start () {
     cube = GameObject.CreatePrimitive(PrimitiveType.Cube);
     //cube.AddComponent(Rigidbody);
     cube.transform.position = Vector3 (0, 0, 0);
     end.transform.position = Vector3 (10, 0, 0);
 }
 
 
 function Update () {
     cube.transform.position = Vector3.Lerp(transform.position, end.position, Time.deltaTime);
 }
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avatar image whydoidoit · Nov 04, 2012 at 03:10 PM 0
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Are you trying to move the cube from the current object's position or from its own?

avatar image whydoidoit · Nov 04, 2012 at 03:13 PM 0
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The last parameter of Lerp is a number between 0 and 1. 1 returns the end & 0 returns the start. Other values interpolate the positions.

The technique of using deltaTime works to update an object with smoothed slow down only when you are updating the start position - which you are not

avatar image fafase · Nov 04, 2012 at 03:30 PM 0
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 cube.transform.position = Vector3.Lerp(cube.transform.position, end.position, Time.deltaTime);

This is what is meant. See here for a little explanation http://answers.unity3d.com/questions/339320/can-someone-help-me-to-understand-what-vector3lerp.html

avatar image Dave-Carlile · Nov 04, 2012 at 03:30 PM 0
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This is more or less the same question that was recently answered here: http://answers.unity3d.com/questions/342154/lerping-issues-c-.html

avatar image fafase · Nov 04, 2012 at 03:37 PM 1
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It is actually asked and answered quite regularly.

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Answer by JD · Nov 05, 2012 at 01:51 AM

Thank you all for your help, I've solved my problem.

 var cube;
 var end : Vector3;
 
 function Start () {
     cube = GameObject.CreatePrimitive(PrimitiveType.Cube);
     //cube.AddComponent(Rigidbody);
     cube.transform.position = Vector3 (0, -10, 0);
     end = Vector3(0, 0, 0);
 }
 
 
 function Update () {
     cube.transform.position = Vector3.Lerp(cube.transform.position, end, Time.time/10);
     //cube.transform.Translate(Time.deltaTime, 0, 0, Camera.main.transform);
 }
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