OpenGL directly supports drawing quads. DirectX breaks a quad into two triangles, thus if you use a lot of quads DirectX will be slower and potentially will not look "correct".
As noted before, the ATI cards typically have had poor OpenGL drivers and thus better performance using DirectX but it varies from card to card and I've heard some of the newer ATI cards (like the 9700) actually have fairly decent OpenGL support.
- John Wright Starfire Research
Mike Goldwater wrote:
Hi,
I have an Acer AMD64 with 2GB but with an ATI Radeon 9700. From the hints I thought it might be worth trying the D3D version. I have just tried your link to a recent build of J3D with D3D on my biggish engineering application. It draws loads of quadrilaterals. When it just draws colours it is fine. However when I switch on the polygon outlines the D3D version slows right down to about down to about 1 frame/sec. On the OpenGL version it draws smoothly. Line thickness is ignored as in the bug pages.
Regards
Mike
_____
Mike Goldwater
=========================================================================== To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff JAVA3D-INTEREST". For general help, send email to [EMAIL PROTECTED] and include in the body of the message "help".
