Print Page - resetting ortho to a given area

Title: resetting ortho to a given area
Post by: renanse on September 18, 2007, 20:43:08

I have a rectangle something I am rendering in ortho mode. It's an arbitrary size and may be arbitrarily placed on the screen (x,y). I want to now render this rectangle to an FBO without changing the rendering code... easy enough... but now I want to change the code so that the fbo ends up being exactly filled by the ortho rectangle... and here is where I am stuck. is this something I can do simply via camera matrix commands?

Title: Re: resetting ortho to a given area
Post by: Fool Running on September 19, 2007, 13:40:04

Try using GL11.glOrtho(left, right, bottom, top, zNear, zFar) to set the view for the rectangle bounds.

Title: Re: resetting ortho to a given area
Post by: renanse on September 19, 2007, 15:09:43

yeah, tried that, thanks. Seems like I also need some kind of model matrix or something of that ilk...

Title: Re: resetting ortho to a given area
Post by: renanse on September 19, 2007, 16:52:48

I ended up just rendering and using uvs to trim down for now.

LWJGL Forum

Programming => OpenGL => Topic started by: renanse on September 18, 2007, 20:43:08