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  Box2D collision gap issue  (Read 280 times)
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Offline Jay_PC

Senior Newbie





« Posted 2014-01-15 08:19:37 »



Im using Box2D and Slick2D and im running into the issue pictured above, the objects are colliding properly but when drawn are not matching visually. I have a rectangle object class that contains
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   private Body body;
   private float width;
   private float height;


and I generate the PolygonShape like this:
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public RectangleObject(float setX, float setY,float width, float height, BodyType setType){

      bd = new BodyDef();
      cs = new PolygonShape();
      cs.setAsBox(width/2, height/2);//knowing that it uses "half-width" and "half-height"
      this.width = width;
      this.height = height;
//...


Similarly I generate the  CircleShape like thus:
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   public CircleObject(float setX, float setY,float radius,BodyType setType){

      bd = new BodyDef();
      cs = new CircleShape();
      bd.position.set(setX, setY);
      cs.m_radius = radius;  
      this.radius = radius;
      this.diameter = radius*2; //this is used later to draw the circle.
//...


And then I render the 2 like thus:
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g.drawRect(platform.getX()-(platform.getWidth()/2f), platform.getY()-(platform.getHeight()/2f), platform.getWidth(), platform.getHeight());
g.drawOval(ball.getX()-ball.getRadius(),ball.getY()-ball.getRadius(),ball.getDiameter(),ball.getDiameter());


Everything works great and the 2 collide almost perfectly except they seem to have a gap in between them. I added more circles, and the CIRCLES dont have this issue.



so I think its a rendering issue on the side of the Rectangle. anyone have any insight as to why they might do this?
Offline Zeke

Junior Devvie


Medals: 1



« Reply #1 - Posted 2014-01-16 02:05:46 »

Is it just me or are the images gone?
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