Re: [osg-users] texture limit?
I dont need 8 textures, but maybe the user of my application. With this application can you create a scene and you can texture an object. The reason of this question is, how many texture channels can I provide? Because of this discussion, I think 8 is ok. Maybe I check the GL_MAX_TEXTURE_IMAGE_UNITS_ARB and create a flexible limit. Thanks at all! Martin Von: osg-users-boun...@lists.openscenegraph.org [mailto:osg-users-boun...@lists.openscenegraph.org] Im Auftrag von Rosario Leonardi Gesendet: Montag, 12. Januar 2009 15:34 An: OpenSceneGraph Users Betreff: Re: [osg-users] texture limit? The limit is imposed by driver, you can read it with the openGL calls int maxTexture; glGetIntegerv(GL_MAX_TEXTURE_IMAGE_UNITS_ARB, &maxTexture); this number should be 16 since geforce 6. BTW, why are you usinge 8 texture? O_O They are a lot. 2009/1/12 Martin Großer Hello Robert, yes, that was what I mean. :-) Also I can use 8, 16 or 32 textures, when this the driver and the hardware this number of textures supports? In my application I use a limit of 8 textures. Is this ok for a average hardware? Cheers. Martin -Ursprüngliche Nachricht- Von: osg-users-boun...@lists.openscenegraph.org [mailto:osg-users-boun...@lists.openscenegraph.org] Im Auftrag von Robert Osfield Gesendet: Montag, 12. Januar 2009 14:35 An: OpenSceneGraph Users Betreff: Re: [osg-users] texture limit? HI Martin, What do you mean by "texture limit per object"? Do you mean how many texture units can be active in OpenGL/OSG at once? If my guess is correct for what you mean then the answer is simply - it's hardware/driver dependant. The answer also depends upon whether you are using shaders or fixed function pipeline as some drivers have a higher limit when using shaders. The OSG itself doesn't apply any limits so you can assign as many texture units as you wish, but it'll only work properly if the underlying OpenGL implementation supports what you are asking from it. Robert. On Mon, Jan 12, 2009 at 1:10 PM, Martin Großer wrote: > Hello, > > I have a simple question. There are a texture limit per object? I thought > there are a limit of 8 textures in OpenGL, but I am not sure. > > A short answer, would be very helpful. > > > Thanks. > > > Martin > > ___ > osg-users mailing list > osg-users@lists.openscenegraph.org > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org -- To be of not to be, this is the FAQ ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] texture limit?
This might shed some light on the matter: http://developer.nvidia.com/object/General_FAQ.html#t6 T From: osg-users-boun...@lists.openscenegraph.org [mailto:osg-users-boun...@lists.openscenegraph.org] On Behalf Of Rosario Leonardi Sent: Monday 12 January 2009 14:34 To: OpenSceneGraph Users Subject: Re: [osg-users] texture limit? The limit is imposed by driver, you can read it with the openGL calls int maxTexture; glGetIntegerv(GL_MAX_TEXTURE_IMAGE_UNITS_ARB, &maxTexture); this number should be 16 since geforce 6. BTW, why are you usinge 8 texture? O_O They are a lot. 2009/1/12 Martin Großer Hello Robert, yes, that was what I mean. :-) Also I can use 8, 16 or 32 textures, when this the driver and the hardware this number of textures supports? In my application I use a limit of 8 textures. Is this ok for a average hardware? Cheers. Martin -Ursprüngliche Nachricht- Von: osg-users-boun...@lists.openscenegraph.org [mailto:osg-users-boun...@lists.openscenegraph.org] Im Auftrag von Robert Osfield Gesendet: Montag, 12. Januar 2009 14:35 An: OpenSceneGraph Users Betreff: Re: [osg-users] texture limit? HI Martin, What do you mean by "texture limit per object"? Do you mean how many texture units can be active in OpenGL/OSG at once? If my guess is correct for what you mean then the answer is simply - it's hardware/driver dependant. The answer also depends upon whether you are using shaders or fixed function pipeline as some drivers have a higher limit when using shaders. The OSG itself doesn't apply any limits so you can assign as many texture units as you wish, but it'll only work properly if the underlying OpenGL implementation supports what you are asking from it. Robert. On Mon, Jan 12, 2009 at 1:10 PM, Martin Großer wrote: > Hello, > > I have a simple question. There are a texture limit per object? I thought > there are a limit of 8 textures in OpenGL, but I am not sure. > > A short answer, would be very helpful. > > > Thanks. > > > Martin > > ___ > osg-users mailing list > osg-users@lists.openscenegraph.org > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org -- To be of not to be, this is the FAQ ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] texture limit?
The limit is imposed by driver, you can read it with the openGL calls int maxTexture; glGetIntegerv(GL_MAX_TEXTURE_IMAGE_UNITS_ARB, &maxTexture); this number should be 16 since geforce 6. BTW, why are you usinge 8 texture? O_O They are a lot. 2009/1/12 Martin Großer > Hello Robert, > > yes, that was what I mean. :-) Also I can use 8, 16 or 32 textures, when > this the driver and the hardware this number of textures supports? > > In my application I use a limit of 8 textures. Is this ok for a average > hardware? > > Cheers. > > Martin > > -Ursprüngliche Nachricht- > Von: osg-users-boun...@lists.openscenegraph.org > [mailto:osg-users-boun...@lists.openscenegraph.org] Im Auftrag von Robert > Osfield > Gesendet: Montag, 12. Januar 2009 14:35 > An: OpenSceneGraph Users > Betreff: Re: [osg-users] texture limit? > > HI Martin, > > What do you mean by "texture limit per object"? Do you mean how many > texture units can be active in OpenGL/OSG at once? > > If my guess is correct for what you mean then the answer is simply - > it's hardware/driver dependant. The answer also depends upon whether > you are using shaders or fixed function pipeline as some drivers have > a higher limit when using shaders. > > The OSG itself doesn't apply any limits so you can assign as many > texture units as you wish, but it'll only work properly if the > underlying OpenGL implementation supports what you are asking from it. > > Robert. > > On Mon, Jan 12, 2009 at 1:10 PM, Martin Großer > wrote: > > Hello, > > > > I have a simple question. There are a texture limit per object? I thought > > there are a limit of 8 textures in OpenGL, but I am not sure. > > > > A short answer, would be very helpful. > > > > > > Thanks. > > > > > > Martin > > > > ___ > > osg-users mailing list > > osg-users@lists.openscenegraph.org > > > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > > > ___ > osg-users mailing list > osg-users@lists.openscenegraph.org > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > > ___ > osg-users mailing list > osg-users@lists.openscenegraph.org > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > -- To be of not to be, this is the FAQ ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] texture limit?
Hi Martin, IIRC a safer number would be 4 texture units; after that, extra texture units are usually only exposed via shaders. I know this is true for most (if not all) NVIDIA GeForce cards. Out of curiosity: can you do anything useful in practice with 8 texture units without using shaders? Cheers, Tanguy -Original Message- From: osg-users-boun...@lists.openscenegraph.org [mailto:osg-users-boun...@lists.openscenegraph.org] On Behalf Of Martin Großer Sent: Monday 12 January 2009 13:54 To: 'OpenSceneGraph Users' Subject: Spam: Re: [osg-users] texture limit? Hello Robert, yes, that was what I mean. :-) Also I can use 8, 16 or 32 textures, when this the driver and the hardware this number of textures supports? In my application I use a limit of 8 textures. Is this ok for a average hardware? Cheers. Martin -Ursprüngliche Nachricht- Von: osg-users-boun...@lists.openscenegraph.org [mailto:osg-users-boun...@lists.openscenegraph.org] Im Auftrag von Robert Osfield Gesendet: Montag, 12. Januar 2009 14:35 An: OpenSceneGraph Users Betreff: Re: [osg-users] texture limit? HI Martin, What do you mean by "texture limit per object"? Do you mean how many texture units can be active in OpenGL/OSG at once? If my guess is correct for what you mean then the answer is simply - it's hardware/driver dependant. The answer also depends upon whether you are using shaders or fixed function pipeline as some drivers have a higher limit when using shaders. The OSG itself doesn't apply any limits so you can assign as many texture units as you wish, but it'll only work properly if the underlying OpenGL implementation supports what you are asking from it. Robert. On Mon, Jan 12, 2009 at 1:10 PM, Martin Großer wrote: > Hello, > > I have a simple question. There are a texture limit per object? I thought > there are a limit of 8 textures in OpenGL, but I am not sure. > > A short answer, would be very helpful. > > > Thanks. > > > Martin > > ___ > osg-users mailing list > osg-users@lists.openscenegraph.org > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] texture limit?
Hi Martin I presume you are talking about texture units The number is a sort of moving target and is down to the card and driver etc OpenGl does provide a methods to query how many units are supported 4 and 8 Units is pretty typical these days, and with certain cards/drivers even up to 32 units, > Hello, > > I have a simple question. There are a texture limit per object? I thought > there are a limit of 8 textures in OpenGL, but I am not sure. > > A short answer, would be very helpful. > > > Thanks. > > > Martin > > ___ > osg-users mailing list > osg-users@lists.openscenegraph.org > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] texture limit?
Hello Robert, yes, that was what I mean. :-) Also I can use 8, 16 or 32 textures, when this the driver and the hardware this number of textures supports? In my application I use a limit of 8 textures. Is this ok for a average hardware? Cheers. Martin -Ursprüngliche Nachricht- Von: osg-users-boun...@lists.openscenegraph.org [mailto:osg-users-boun...@lists.openscenegraph.org] Im Auftrag von Robert Osfield Gesendet: Montag, 12. Januar 2009 14:35 An: OpenSceneGraph Users Betreff: Re: [osg-users] texture limit? HI Martin, What do you mean by "texture limit per object"? Do you mean how many texture units can be active in OpenGL/OSG at once? If my guess is correct for what you mean then the answer is simply - it's hardware/driver dependant. The answer also depends upon whether you are using shaders or fixed function pipeline as some drivers have a higher limit when using shaders. The OSG itself doesn't apply any limits so you can assign as many texture units as you wish, but it'll only work properly if the underlying OpenGL implementation supports what you are asking from it. Robert. On Mon, Jan 12, 2009 at 1:10 PM, Martin Großer wrote: > Hello, > > I have a simple question. There are a texture limit per object? I thought > there are a limit of 8 textures in OpenGL, but I am not sure. > > A short answer, would be very helpful. > > > Thanks. > > > Martin > > ___ > osg-users mailing list > osg-users@lists.openscenegraph.org > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] texture limit?
HI Martin, What do you mean by "texture limit per object"? Do you mean how many texture units can be active in OpenGL/OSG at once? If my guess is correct for what you mean then the answer is simply - it's hardware/driver dependant. The answer also depends upon whether you are using shaders or fixed function pipeline as some drivers have a higher limit when using shaders. The OSG itself doesn't apply any limits so you can assign as many texture units as you wish, but it'll only work properly if the underlying OpenGL implementation supports what you are asking from it. Robert. On Mon, Jan 12, 2009 at 1:10 PM, Martin Großer wrote: > Hello, > > I have a simple question. There are a texture limit per object? I thought > there are a limit of 8 textures in OpenGL, but I am not sure. > > A short answer, would be very helpful. > > > Thanks. > > > Martin > > ___ > osg-users mailing list > osg-users@lists.openscenegraph.org > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
