orm float u_size;

        in vec2 v_texCoord;
        out vec4 out_color;

        float circle(vec2 p, vec2 onePixel, float size)
        {
            for (float angle = 0.0; angle < 6.283; angle += 0.05)
            {
                vec2 center = vec2( p.x + size * cos(angle), p.y + size * sin(angle) );

                if (PIXEL_AT( center.x, center.y).r > 0.0)
                {
                    return 1.0;
                }
            }

            return 0.0;
        }

        float crosshair(