Why does each sprite set the projection matrix?

[jdindia]

I've recently started using SFML in a platform game.  Because I had polygonal textured tiles, I had to do a bit of source browsing to make sure my OpenGL calls wouldn't cause trouble with the generic SFML sprites I was using.

I discovered that the SFML RenderWindow Draw call was setting the projection matrix and then calling the drawable's render function.  This seems a bit strange to me.  I'd expect SetView to change the matrix and then everything else to assume it had been set properly.

[Imbue]

SFML does have a sf::RenderTarget::PreserveOpenGLStates() function you may want to look into.

I'm doing a very small amount of OpenGL and I haven't had any problems yet.