Re: [cadcdev-tiki] GL_QUADS

[Dan P. <ba...@al...>]

On May 11, 2006, at 5:13 PM, Sam Steele wrote:

> What's the recommended way to draw GL_QUADS from inside a  
> Drawable?  the plx_compat stuff the existing drawables are using  
> only does triangle strips.  I currently have all my characters  
> being rendered as 2 triangles (like banner) plus 2 triangles for  
> the background block behind it, but that results in 8000 polys for  
> an 80x25 screen, which is just slightly too many for the PVR to  
> render (it gives up after drawing the background, and 49% of the  
> foreground polys).  Using GL_QUADS instead would require only 4000  
> polys, which the Dreamcast likes a lot better :)  Should I just use  
> glBegin(GL_QUADS); etc. inside my drawable and use the GL vertex  
> calls?

The PVR seems capable of drawing quads, but no one's really figured  
it out 100%. Everything else just uses triangle strips for  
everything, even single triangles. :) So yeah, GL_QUADS won't help  
you much -- that'll just get rendered as a two triangle strip.