This coule be a limitation of your graphics card. Do check your maximum texture dimension and make sure it supports non-power-of-two textures. Most cards today support 4096 sized textures.
The ImageForeground does not use textures, but directly copies data to the framebuffer, thus it can use larger images. /Marcus Jie Liu wrote: > *Another problem, * > > If I take an image as a texture, OpenSG will fail to read some large > images, for instance, with the size of 1635x2573. But if I take them as > foreground, they can show correctly. > > > > 2009/8/10 Jie Liu <[email protected] > <mailto:[email protected]>> > > Hi, > > I want to use OpenSG do display about 150 images located in a given > directory. > For each time, I show one of them, and I press left key or right key > to nevigate backward or forward. All images should align center, > keep their width/height (w/h) ratio and they will fit to the width > or height of the window according to the value of w/h ratio. > > I now have three solutions for this purpose. > a). take an image as a background object. The problem is OpenSG will > auto scale the image to the window area for me. But as I must keep > the width/height ratio of the image, I give up. > > b). take an image as a foreground object, the problem is I can only > appoint its bottom-left position. There seems no parameters for me > to scale its size. Below are my code to do this > =================================================================== > ImagePtr tImage = Image::create(); > *tImage->read(file_name[index]);* *// I change the value of > /index/ to display different images. Images are loaded dynamically > according to their names* > > ImageForegroundPtr ptrImgForeground = ImageForeground::create(); > beginEditCP(ptrImgForeground); > { > * ptrImgForeground->addImage(tImage, Pnt2f(0.0, 0)); // Can I > assign a bounding box for an image? Or do I have to manually scale > the image first?* > } > endEditCP(ptrImgForeground); > > * g_ptrViewport->getMFForegrounds()->push_back(ptrImgForeground); * > *// push_back is to add a new image to the queue, OpenSG will try to > render all images in the queue and this will slow down the rendering > speed obviously. But I only want to display a single image at one > time. So what is the right and efficient way to replace the current > foreground image? > *================================================================ > > c). Take an image as a texture material, and attach it to a Quad > primitive. > ================================================================ > ImagePtr tImage = Image::create(); > tImage->read(file_name[index]); > > beginEditCP(g_ptrGeoTex); > g_ptrGeoTex->setImage(tImage); *// g_ptrGeoTex is a globle > variable, its type is SimpleTexturedMaterialPtr* > endEditCP(g_ptrGeoTex); > > beginEditCP(g_ptrGeoQuad); > g_ptrGeoQuad->setMaterial(g_ptrGeoTex);* // I found the > setMaterial process will be very very slow, how can I accelerate it?* > endEditCP(g_ptrGeoQuad); > ================================================================ > > So, what is your suggestion to write such a program? I also want to > load all iamges at the begining of the program and store them in > vectors (vector<ImagePtr>, and vector<SimpleTexturedMaterialPtr>), > but the program crashed while switching the image. What is the right > way to read and store all image data? > > The email is a little long, I hope it will not bother you too much~~ > > Thanks > > -- > Jie Liu > Visualization Research Group > Center for Information Science, School of EECS, > Room 2104, Science Building No.2, > Peking University, Beijing 100871, China > > > > > -- > Jie Liu > Visualization Research Group > Center for Information Science, School of EECS, > Room 2104, Science Building No.2, > Peking University, Beijing 100871, China > > > ------------------------------------------------------------------------ > > ------------------------------------------------------------------------------ > Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day > trial. Simplify your report design, integration and deployment - and focus on > what you do best, core application coding. Discover what's new with > Crystal Reports now. http://p.sf.net/sfu/bobj-july > > > ------------------------------------------------------------------------ > > _______________________________________________ > Opensg-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/opensg-users ------------------------------------------------------------------------------ Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day trial. Simplify your report design, integration and deployment - and focus on what you do best, core application coding. Discover what's new with Crystal Reports now. http://p.sf.net/sfu/bobj-july _______________________________________________ Opensg-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/opensg-users
