camera behavior and lerp damping

Hi,

I am trying to use lerp on a camera position to seek it's target but with no great result, it isn't fluid when seeking fast, slow lerp is ok tho. it's as if I was using Update() rather than LateUpdate or something like that:

I am currently doing the race tut ( to give you an idea of the environment I am in. and this is a simple alteration of the /1 Basic Follow Camera/camera.js

Here is the code.

Code (csharp):

1.  
2. var target : Transform;
3. var distance = 10.0;
4. var height = 5.0;
5.  
6. function LateUpdate () {
7.     // Early out if we don't have a target
8.     if (!target)
9.         return;
10.    
11.     // Get the forward direction of the target
12.     forward = target.TransformDirection (Vector3.forward);
13.  
14.     newPosition = target.position - forward * distance + Vector3(0,height,0);
15.  
16.  
17.     transform.position = Vector3.Lerp(transform.position, newPosition, 0.8*Time.deltaTime);
18.    
19.  
20.     // Always look at the target
21.     transform.LookAt (target);
22. }
23.  

damping with 0.8 increase the fluidity but higher value increases the unwanted effect...

thanks for your help,


Jean

 

If I understand what you are doing correctly then there is just one small mistake in your code. Instead of

Code (csharp):

1. transform.position = Vector3.Lerp(transform.position, newPosition, 0.8*Time.deltaTime);

...you probably want

Code (csharp):

1. transform.Translate((newPosition - transform.position) * (0.8 * Time.deltaTime), Space.World);

(That is to say, you don't need the Lerp in this particular case.)

You might need to change the constant 0.8 to something smaller or larger (but still between 0 and 1) to get the right camera speed, however. A useful trick is to make this a public variable and change its value while the game is running. Try different values until you get it just right and then make a note of the final value before you stop the running game.

 

Hi,


Thanks. It does produce the same unwanted artifact so I assume that my issue is actually not the camera behavior but the actual target that is the cause of this shaking. I will investigate.


Bye,

Jean

 

is your camera shaking too?? cause i have the same effect on the camera and don't know why! in the first i feel that the target that shaking but the target dosen't rotate at all, why is that happened? did u figure out this problem?
i use the Lerp function also on my camera script.

 

Hi,

I did not find a solution no, I just used more damping.

 

Check my answer in this thread: http://forum.unity3d.com/threads/camera-following-rigidbody.171343/#post-2491001