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Re: IDL 6.1.1 : how to activate opengl in hardware ? [message #42354 is a reply to message #42353]

Fri, 28 January 2005 06:26

Jérôme Boivin
Messages: 6
Registered: January 2005

Junior Member

Ok, I think I understand... when you set RETAIN=2 in Widget_Draw(), then
it desactivate hardware rendering !!! With RETAIN=0, I must control the
drawing update, but hardware rendering is back ! Is it a bug, or I
misunderstood what RETAIN keyword means ? Thanks for your help...
Regards,

J. Boivin
(For those who understand frenchies, http://jboivin.free.fr/visualisDicom/)

------------------------------------------------------------ ----------
Thanks for your answer. No, I have no dual screens, and I render
directly to an IDLgrWindow and not to an IDLgrBuffer. I will perform the
anti-aliasing test, and I'll see...

I'm using :
draw3dID = Widget_Draw(tab3DgaucheID, xsize=512, ysize=512, RENDERER=0,
GRAPHICS_LEVEL=2, /BUTTON_EVENTS, /MOTION_EVENTS, /EXPOSE_EVENTS, RETAIN=2)
and not directly an IDLgrWindow object, is there a difference ?

JB

Rick Towler a ï¿½crit :
> David Fanning wrote:
> :=?ISO-8859-1?Q?J=E9r=F4me_Boivin?= writes:
>
>>
>>
>>> ( I don't understand why IDL Virtual Machine doesn't activate
>>> hardware rendering...
>
>
> It does. You must have a problem with your configuration.
>
> Are you running dual monitors (some nVidia dual monitor configurations
> will not be accelerated on the secondary monitor)? You do know that
> volume rendering is not accelerated? You are rendering directly to an
> IDLgrWindow and not to a IDLgrBuffer and then to the window (IDL always
> renders to the buffer via software renderer)?
>
> You will always see your processor pegged at 100% as IDL is very
> processor bound in practice but this doesn't mean that it isn't
> rendering via openGL.
>
> A simple test would be to turn on your adapters anti-aliasing and render
> a simple IDLgrPolygon object using XOBJVIEW. Inspect the object for
> jaggies. Turn it off and perform the same test. If your adapter is
> working the difference between the two will be obvious. (you need to
> restart IDL after changing the AA state).
>
>
>> Probably because they would prefer to show off their software running
>> correctly (albeit slowly) rather than incorrectly (but fast). :-)
>
>
> David, I think you are living in the 90's. You're still not using that
> Quadro you bought 3 years ago are you???
>
> There are very few if any issues I have run into with hardware rendering
> in the past few years and recently I encountered the problem the other
> way around.
>
> And as for speed, unless you have a very unbalanced system you should
> always render faster with hardware rendering enabled. As an added
> bonus, image quality is often better since most modern graphics adapters
> perform anti-aliasing.
>
>
> -Rick

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[Message index]

		Re: IDL 6.1.1 : how to activate opengl in hardware ? By: Karl Schultz on Fri, 28 January 2005 10:05
		Re: IDL 6.1.1 : how to activate opengl in hardware ? By: David Fanning on Fri, 28 January 2005 06:40
		Re: IDL 6.1.1 : how to activate opengl in hardware ? By: Jérôme Boivin on Fri, 28 January 2005 06:26
		Re: IDL 6.1.1 : how to activate opengl in hardware ? By: Jérôme Boivin on Fri, 28 January 2005 05:19
		Re: IDL 6.1.1 : how to activate opengl in hardware ? By: David Fanning on Thu, 27 January 2005 22:31
		Re: IDL 6.1.1 : how to activate opengl in hardware ? By: netnews.comcast.net on Thu, 27 January 2005 22:13
		Re: IDL 6.1.1 : how to activate opengl in hardware ? By: David Fanning on Thu, 27 January 2005 13:06
		Re: IDL 6.1.1 : how to activate opengl in hardware ? By: Jérôme Boivin on Thu, 27 January 2005 12:52
		Re: IDL 6.1.1 : how to activate opengl in hardware ? By: David Fanning on Thu, 27 January 2005 10:51

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