Thanks, I'll try your suggestion. Alessandro On Tue, Jun 1, 2010 at 11:01 AM, J.P. Delport <[email protected]> wrote:
> Hi, > > > On 01/06/10 10:45, alessandro terenzi wrote: > >> >> Do you want to create an application that takes the model and output >> a new model? Or do you want to create something that changes the >> model at input time in an application? >> >> >> Well, I need to change the model just once before using it (I mean I >> could either show it in a viewer or save it to disk) in both cases I >> just need to replace the texture that has no alpha information with the >> one that actually has it. >> >> Do you want to fuse two textures together (one with image info and >> one with alpha info)? >> >> >> No, just replace the one without alpha with the new one. >> >> Maybe it uses Windows API just for windowing and you can look at the >> conversion code? >> >> >> Actually that code is very simple because it uses a class (Bitmap) that >> let you access each pixel R,G,B and alpha values...so the code performs >> a simple loop that updates the alpha value with a mean of R,G and B >> values. >> > > OK, following could work then: > > 1) get data into osg::Image (RGB), either by loading directly from disk, if > you can, or getting from texture using visitor/RTT. > 2) create new osg::Image (and allocate memory) with same size as original, > but with alpha channel. > 3) Do the conversion using pointers to the data. Data is stored e.g. > RGBRGBRGB... or RGBARGBARGBA... > 4) change texture format to RGBA and call setImage with new image. > > jp > > > >> Alessandro >> >> >> >> _______________________________________________ >> osg-users mailing list >> [email protected] >> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org >> > > -- > This message is subject to the CSIR's copyright terms and conditions, > e-mail legal notice, and implemented Open Document Format (ODF) standard. > The full disclaimer details can be found at > http://www.csir.co.za/disclaimer.html. > > This message has been scanned for viruses and dangerous content by > MailScanner, and is believed to be clean. MailScanner thanks Transtec > Computers for their support. > > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org >
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