H Shawl,
The OSG supports multi-texturing, simply assign each texture to its own
texture unit. See the osgmultitexture example and osggeometry examples to
see how to assign multiple textures and set up text coords.
Robert.
On 13 November 2012 07:38, wh_xiexing wrote:
> **
>
> i have a mesh and want to project several photo on the mesh . code is
> here:
>
> osg::Switch *layer = new osg::Switch;
> osg::Geode* leaf = 0;
> if (!hasTexture){
> leaf = createLeaf(points, numOfVert, tris,header.np);
> layer->addChild(leaf);
> }else{
> osg::Group *group = new osg::Group;
> for (unsigned int gr = 0; gr < header.ngr; gr++){
> /*for every group , load the different texture*/
> osg::Texture2D* texture = 0L;
> osg::ref_ptr image;
> if(osgDB::isAbsolutePath(groups[gr].texmap)){
> image = osgDB::readImageFile(std::string(groups[gr].texmap));
> }else{
> std::string absoluteFile = osgDB::getFilePath(fileName)
> + std::string("/")
> + std::string(groups[gr].texmap);
> image = osgDB::readImageFile(absoluteFile);
> }
> texture = new osg::Texture2D;
> texture->setImage( image.get() );
> if (texture->getImage()!=0L){
> group->getOrCreateStateSet()->setTextureAttributeAndModes(gr,texture );
> //set texture units
>
> group->getOrCreateStateSet()->setTextureAttribute(gr, new
> osg::TexEnv(osg::TexEnv::DECAL));
> }
> /*create group leaf*/
>
> leaf = createLeaf(points, tris_t, groups[gr].poly_begin, groups[gr].poly_end,
> gr);
> group->addChild(leaf);
> }
> layer->addChild(group);
> }
>
> the problem is that just one texture unit works .
> in case :
> for (unsigned int gr = 0; gr < header.ngr; gr++){ unit 0
> works
> for (unsigned int gr = 1; gr < 2; gr++){
> unit 1 works
>
>
> then , how can i show the whole mesh with texture?
>
>
> thanks in advance
> --
> Shawl
>
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