poly_set  = nonConvexPoly.getVertices(nonConvexBody.getPosition(), nonConvexBody.getRotation());

    public float rotateX(float angle, float x, float y)
    {
   return ((float)Math.cos(angle) * x - (float)Math.sin(angle) * y);
    }
    
    public float rotateY(float angle, float x, float y)
    {
     return ((float)Math.sin(angle) * x + (float)Math.cos(angle) * y);
    }

       SlickMyGame.my_texture.rotate(nonConvexBody.getRotation());
       g.texture(slick_polygon, SlickMyGame.my_texture,1.0f,1.0f, true);

SlickMyGame.my_texture = new Image("data/square.png", false, Image.FILTER_NEAREST);

             static Vector2f[] nonConvexPoly = {new Vector2f(-60,-70), new Vector2f(20,-100), new Vector2f(10,0), new Vector2f(20,10), new Vector2f(-20,10), new Vector2f(-10,0)};

             polygon = new Polygon(nonConvexPoly); //Phys2d polygon
             nonConvexBody = new Body("poly", polygon, 30.0f);
             nonConvexBody.setPosition(350, 100.0f);
        world.add(nonConvexBody)
            

            slick_polygon= new Polygon(); // Slick polygon

            for (int i=0;i<nonConvexPoly.length;i++)
            {
               slick_polygon.addPoint(nonConvexPoly[i].getX(), nonConvexPoly[i].getY());  
            }
            

          g.texture(slick_polygon, SlickMyGame.my_texture,1.0f,1.0f, true);