Re: [JAVA3D] Java3D Win D3D & OpenGL in a single package!!!

[Mike Goldwater]

Hi John,   > DirectX breaks a quad into two > triangles, thus if you use a lot of quads DirectX will be slower   But it is fine on solid colour quads. It is only when the polygon outlines are switched on (even in outline only mode) that it slows right down. This is a bug which makes the D3D unusable in my application.   > I've heard some of the newer ATI cards (like the 9700) actually > have fairly decent OpenGL support   When it works the response and appearance are excellent. However there are occasional javaw failures which appear to be caused by the ATI drivers. Difficult to track down as the errors are intermittent.   Regards   Mike   ___________________________________ Mike Goldwater Auric Hydrates Ltd 26, Sandal Road New Malden Surrey KT3 5AP ________ Work:       +44 (20) 8949 0353 Home: +44 (20) 8395 7587 Mobile: +44 (7956) 359001 e-mail: [EMAIL PROTECTED] <mailto: [EMAIL PROTECTED]> web: http://www.wellwhiz.com       -----Original Message----- From: Discussion list for Java 3D API [mailto:[EMAIL PROTECTED] On Behalf Of John Wright Sent: 12 October 2004 15:14 To: [EMAIL PROTECTED] Subject: Re: [JAVA3D] Java3D Win D3D & OpenGL in a single package!!!   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". =========================================================================== 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".