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  Image not rotating around its center...  (Read 1090 times)
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Offline v0rtex

Senior Newbie





« Posted 2012-10-06 10:30:24 »

Hey all,

I am working on a new game and I have decided to try my hand at rotation. After looking at a few tutorials and learning, I came up with this:

AnimatedSprite.java - handles the actual animation,rotation and movement of sprite

http://pastebin.java-gaming.org/827c3257f21

Entity.java - just a class that handles the default attributes that all sprites will share

http://pastebin.java-gaming.org/27c353f7123

And finally MainFrame.java which just tests our code

http://pastebin.java-gaming.org/7c35f417320

The problem lies in my transform() method of AnimatedSprite.java

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   public void transform() {
      at.setToIdentity();
      //translate to center of component
      at.translate(this.getX() +  getImageWidth() / 2,
            this.getY() + getImageHeight() / 2);
      //do rotation
      at.rotate(Math.toRadians(getFaceAngle()));
      //translate so the rotation occurs around the center of the object
      at.translate(-getImageWidth() / 2, -getImageHeight() / 2); //is something going wrong here?
   }


When I rotate the image, it rotates but it doesn't seem to rotate around the center of the image as can be seen in the screenshot below:



Any help is appreciated but I will keep working on this. Thanks!
Offline v0rtex

Senior Newbie





« Reply #1 - Posted 2012-10-06 12:01:37 »

Found the problem... What a stupid mistake it was haha. My getImageWidth() and getImageHeight() were not returning the correct value of 48
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