           # circle
           fixture.shape = new b2CircleShape
           fixture.shape.SetRadius(config.size)
-      
+      #fixture.filter.maskBits = 2
       body = new b2BodyDef
       body.angle = angle
       body.type = b2Body.b2_kinematicBody

        b.SetPosition(new b2Vec2(pos.x, pos.y + 0.01)) # should be customizable
      b = b.GetNext()

    @field.world.DrawDebugData()
    # grid
    @s.lineWidth = 1

      wall : new shapeConfig(1, 1, 0, 0.8)
      floor : new shapeConfig(1, 1, 0, 0.8)
      ceil : new shapeConfig(1, 1, 0, 0.8)
      shoot: new shapeConfig(0.5, 8, 0, 0.8)
      shape: [
        [
          new shapeConfig(1, 1, 0.5, 0.8)
