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;
}