The bounding box defines the smallest rectangle encompassing the graphic object. It is returned by the following method:

The following example defines the shape of a graphic object with the drawrect field. In order to return the bounding box of the object, the boundingBox method simply applies the transformer to the rectangle:

class MyRectangle extends IlvGraphic
{
   // The geometric rectangle that defines the object.
   final IlvRect drawrect = new IlvRect();
 
   //constructor
   public MyRectangle(float x, float y, float width, float height)
   {
    drawrect.reshape(x, y, width, height);
   }
 
   // The bounding box method.
   public IlvRect boundingBox(IlvTransformer t)
   {
      //Copies the original rectangle to avoid its modification
      IlvRect rect = new IlvRect(drawrect);
      if (t != null)
        t.apply(rect);
      return rect;
   }
}

The method boundingBox is a very important method. Since it is called very frequently, it must be written in a highly optimized way.