示例#1
0
        void setVertexAttrib(osg::Geometry& geom, const AttributeAlias& alias, osg::Array* array, bool normalize, osg::Array::Binding binding = osg::Array::BIND_UNDEFINED)
        {
            unsigned int index = alias.first;
            const std::string& name = alias.second;
            array->setName(name);
            if (binding!=osg::Array::BIND_UNDEFINED) array->setBinding(binding);
            array->setNormalize(normalize);
            geom.setVertexAttribArray(index, array);

            osg::notify(osg::NOTICE)<<"   vertex attrib("<<name<<", index="<<index<<", normalize="<<normalize<<" binding="<<binding<<")"<<std::endl;
        }
    bool InstancesManagerImpl::_initSkinning(osg::Geometry& geom, const image_data& id )
    {
        osg::Geometry& source = geom;
        osg::Vec3Array* positionSrc = dynamic_cast<osg::Vec3Array*>(source.getVertexArray());
        if (!positionSrc)
        {
            OSG_WARN << "InstancedAnimationManager no vertex array in the geometry " << geom.getName() << std::endl;
            return false;
        }

        osg::ref_ptr<osg::Program> cSkinningProg = creators::createProgram("skininst2").program; 
        cSkinningProg->setName("SkinningShader");

        const int attribIndex = cAttribSkinningBaseIndex;
        int nbAttribs = id.bonesWeights.size();
        for (int i = 0; i < nbAttribs; i++)
        {
            osg::ref_ptr<osg::Vec4Array> array = new osg::Vec4Array(osg::Array::BIND_PER_VERTEX);
            const image_data::weights_t&  w = id.bonesWeights[i];
            for (unsigned j = 0; j < w.size(); j+=id.divisor)
            {
                array->push_back(osg::Vec4(w.at(j),w.at(j+1),w.at(j+2),w.at(j+3)));
            }		

            std::stringstream ss;
            ss << "boneWeight" << i;
            cSkinningProg->addBindAttribLocation(ss.str(), attribIndex + i);
            geom.setVertexAttribArray(attribIndex + i, array);
            OSG_INFO << "set vertex attrib " << ss.str() << std::endl;
        }

        osg::ref_ptr<osg::StateSet> ss = geom.getOrCreateStateSet();
        ss->addUniform(new osg::Uniform("nbBonesPerVertex", id.bonesPerVertex));
        ss->setAttributeAndModes(cSkinningProg.get());

        return true;
    }