how to render upside down

[ILuvYouCompanionCube]

I got this idea after today's talk about Dinnerbone. I got this idea that it's probably quite easy to render something upside down. You probably wouldn't need a whole new renderer or to redefine lots of things on the one you have. I can almost bet it's just a matter of setting one or 2 GL11 thingies or whatever. And your model gets upside down. That would be useful under a lot of circumstances.

 

Does anybody know if I'm right, and if I am, what are the thingies to set to render something upside down?

[hydroflame]

GL11.glScaled(1,-1,1);

 

will turn the model upside down compared to current matrix origin

[Naiten]

GL11.glScaled(1,-1,1);

 

will turn the model upside down compared to current matrix origin

I bet this will mess up the model. More exactly: player will see not outer sides of polygons, but inner.

P.S.

Yes, it does:

 

So it's better to rotate the model upside down, like GL11.glRotatef(180f, 1f, 0, 0); or GL11.glRotatef(180f, 0, 0, 1f);

Yes, the model won't be mirrored, but it's only working way i can imagine.

[hydroflame]

yeah i guess, you could also switch the winding order

[ILuvYouCompanionCube]

I knew it couldn't be complicated, or they wouldn't have put that Dinnerbone easter egg. Thanks for clarifying that for me.