Hi Robert, Last time I got the problem is related to hardware, so texture3D is not supported by the graphic card. Now I tested on other machines. I ran the testing code and there is no any error message on console, but the display image is not correct. The image problem is same as the image shown on http://www.openscenegraph.org/projects/osg/wiki/Community/Tasks/OpenGLConformance about "GL_SGIS_generate_mipmap doesn't work", so I guess the problem is related to mipmap. Do you think this problem is also related to the hardware?
Regards, Clement ________________________________________ From: [email protected] [[email protected]] On Behalf Of Robert Osfield [[email protected]] Sent: Friday, 16 March 2012 8:17 PM To: OpenSceneGraph Users Subject: Re: [osg-users] Incorrect volume image Hi Clement, On 16 March 2012 03:13, <[email protected]> wrote: > When I loaded an image with using osgvolume, it cannot show probably. I > found the error listed as > http://www.openscenegraph.org/projects/osg/wiki/Community/Tasks/OpenGLConformance > about "GL_SGIS_generate_mipmap doesn't work". I would like to know whether > there is a any solution to fix the problem. My graphic card details is as > below. Thanks. The note on the OpenGLConformance page is for an ATI graphics card, not Intel GMA graphics. In general one doesn't use mipmapping with volumes, and osgVolume by default just uses linear interpolation filters with the Texture3D so won't be invoking any mipmap generation, either on the CPU side or GPU side. I therefore don't think the issue you have is to do with the GL_SGIS_generate_mipmap. What is the reason why you suggested this? As I've said before Intel graphics isn't something that is going to handle volume rendering, it neither has the hardware capability or driver quality up to the task. If you want to do volume rendering you should use an ATI or NVidia graphics card. Even a $50 card will be pretty capable, it's certainly far far less work just buy the appropriate hardware for the task than just and chase up problems with hardware that will never be capable of doing doing proper volume rendering. Robert. _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
