p", function() {
            document.removeEventListener("mousemove", handleMouseMove, true);
            isMouseDown = false;
            mouseX = undefined;
            mouseY = undefined;
         }, true);
         
         function handleMouseMove(e) {
            mouseX = (e.clientX - canvasPosition.x) / 30;
            mouseY = (e.clientY - canvasPosition.y) / 30;
         };
         
         function getBodyAtMouse() {
            mousePVec = new b2Vec2(mouseX, mouseY);
            var aabb = ne