LibGDX - rotate player to face the mouse

Newbie & Debugging Questions
#1

Hi guys

I’ve been looking into rotating my player sprite to face the mouse cursor and I’ve hit an issue. The rotation works but it spins out of control.

This is the first time I’ve tried doing this and quickly read some guides but I likely missed something. Below is the code i’m using for the rotation along with a gif of the problem(The other ship you see if where the mouse is):

	 
      float angle = (float) Math.atan2(Gdx.input.getY() - player.getPlayerSprite().getY(), Gdx.input.getX() - player.getPlayerSprite().getX());
		
		angle = (float) Math.toDegrees(angle);
				
		player.getPlayerSprite().rotate(angle);

Sorry that the gif is so small


https://i.imgflip.com/bfq2h.gif

Like I said, I’ve not done this before or actually anything with rotations so i’m still trying to learn and hopefully someone can help me out :point:

#2

Math.atan2(x-x,y-y)

You put wrong coordinates.

EDIT–
Also, .rotate probably adds to the current rotation. You need to do something like .setAngle or .setRotation or something like that.

#3

He has it right. http://docs.oracle.com/javase/7/docs/api/java/lang/Math.html#atan2(double,%20double)

That said, note that in libGDX, mouse events are in a top-left origin coordinate system, but everything else is bottom left.
Also, what is the rotate method? Is it designed to accepts it’s parameter in degrees?

EDIT:

That’s almost definitely what it is.

#4

Fixed ;D love you, Troll xD

@Pizza The parameters asks for degrees as it’s parameter :slight_smile:

#5

I figured as much, but there was the possibility that that was not Sprite.rotate(), so I thought I’d ask.