LibGDX camera smooth translation

Question

How can I lerp (linear interpolate) the camera of top view game which has follow on player so it doesn't tremble as it gets close to the target. This is the code I use for camera translation:

//Creating a vector 3 which represents the target location (my player)
Vector3 target = new Vector3(
(float)player.getPosition().x*map.getTileWidth()+(float)map.getTileWidth()/2, 
(float)player.getPosition().y*map.getTileHeight()+(float)map.getTileHeight()/2, 
0);
//Creating vector 3 which gets camera position
Vector3 cameraPosition = camera.position;
//Interpolating (lerping) vector 
cameraPosition.lerp(target, 0.1f);
//Updating camera and setting it for batch
camera.position.set(cameraPosition);        
camera.update();
batch.setProjectionMatrix(camera.combined);

I think I did this right but the alpha value might be too small, yet again if i make it bigger then camera moves too fast and other issues appear. Can i make the trembling stop with this alpha value (in my example alpha is 0.1f)?

Answer 1

I think that you don't want linear interpolation, but something like this (not tested, and the vector operations should be considered pseudo-code at best):

//Change speed to your need
final float speed=0.1f,ispeed=1.0f-speed;
//The result is roughly: old_position*0.9 + target * 0.1
cameraPosition.scale(ispeed);
target.scale(speed);
cameraPosition.add(target);

camera.position.set(cameraPosition);

Answer 2

So i tried for libgdx and it worked just fine, only change scale for scl function in Vector3 and speed for the delta

 public void updateCam(float delta,float Xtaget, float Ytarget) {

        //Creating a vector 3 which represents the target location myplayer)
        Vector3 target = new Vector3(Xtaget,Ytarget,0); 
        //Change speed to your need
        final float speed=delta,ispeed=1.0f-speed;
        //The result is roughly: old_position*0.9 + target * 0.1
        Vector3 cameraPosition = camBox2D.position;
        cameraPosition.scl(ispeed);
        target.scl(speed);
        cameraPosition.add(target);
        camBox2D.position.set(cameraPosition);
}