private static void DrawGraphic(VBO graphic, Vector2d p1, Vector2d rotationAnchor, float opacity)
{
var angle = Angle.FromLine(p1, rotationAnchor);
var offset = -(Game.ScreenPosition - p1);
GL.PushMatrix();
GL.Scale(Game.Track.Zoom, Game.Track.Zoom, 0);
GL.Translate(offset.X, offset.Y, 0);
GL.Rotate(angle.Degrees, 0, 0, 1);
GL.Scale(0.5, 0.5, 0);
graphic.SetOpacity(opacity);
GL.BlendFunc(BlendingFactorSrc.SrcAlpha, BlendingFactorDest.OneMinusSrcAlpha);
graphic.Draw(PrimitiveType.Triangles);
GL.PopMatrix();
}
public void Draw()
{
_vbo.Draw(PrimitiveType.Triangles);
}