Quickbox2D eraser

Question

How to erase/destroy quick objects in an array?
My application is similar to linerider where you draw a line and it forms into quick objects allowing another quick object (ball) to roll on it. I want to erase the line (quickobjects) like an eraser, is there any way to do it?
//WHEN MOUSE UP, IT CAN CREATE THE PLATFORMS FOR THE BALL TO BOUNCE
                    function mouse_released(e:MouseEvent):void {
            drawing=false;
            var sx:int;
            var ex:int;
            var sy:int;
            var ey:int;
            var dist_x:int;
            var dist_y:int;
            var dist:Number;
            var angles:Number;
            var segments:int=points_array.length/2-1;
            for (var i:int=0; i<segments; i++) {
                sx=points_array[i*2];
                sy=points_array[i*2+1];
                ex=points_array[i*2+2];
                ey=points_array[i*2+3];
                dist_x=sx-ex;
                dist_y=sy-ey;
                dist=Math.sqrt(dist_x*dist_x+dist_y*dist_y);
                angles=Math.atan2(dist_y,dist_x);
               _platform = sim.addBox({x:(sx+ex)/60, y:(sy+ey)/60, width:Math.abs(dist)/30, height:2/30, angle:angles, restitution:1, density:0});//create_box
               _platforms_array.push (_platform);
            canvas.graphics.clear();
            canvas.graphics.lineStyle(2);
function key_down(event:KeyboardEvent):void {
    if (event.keyCode==48) {
          I want users to press "0" and mouseover to ERASE any part of the line(quickobjects)
any idea how to do it? thanks!

Answer 1

The easiest thing to start with is to reset the Eraser Tool.
Right click on the Eraser icon in the tool options bar and then click on Reset Tool.