Example #1
0
void EdgeGroup::synchronizeEdges()
{
	QList<qlonglong> edgeKeys = edges->keys();

	for (int i = 0; i < 2; i++)
	{
		osg::ref_ptr<osg::Geometry> geometry = edgeGroup->getChild(i)->asGeode()->getDrawable(0)->asGeometry();
		const osg::Geometry::PrimitiveSetList primitives = geometry->getPrimitiveSetList();

		for (unsigned int x = 0; x < primitives.size() ; x++)
		{
			Data::Edge * e = dynamic_cast<Data::Edge * >(primitives.at(x).get());

			if (!edgeKeys.contains(e->getId()))
			{
				geometry->removePrimitiveSet(geometry->getPrimitiveSetIndex((e)));
			}
		}
	}

	QMap<qlonglong, osg::ref_ptr<Data::Edge> >::iterator ie = edges->begin();

	while (ie != edges->end()) 
	{
		if (!(*ie)->isOriented() && geometry->getPrimitiveSetIndex((*ie)) == geometry->getNumPrimitiveSets())
			geometry->addPrimitiveSet(*ie);
		else if ((*ie)->isOriented() && orientedGeometry->getPrimitiveSetIndex((*ie)) == orientedGeometry->getNumPrimitiveSets())
			orientedGeometry->addPrimitiveSet(*ie);

		ie++;
	}
}
Example #2
0
void TriStripVisitor::mergeTriangleStrips(osg::Geometry::PrimitiveSetList &primitives)
{
    int nbtristrip         = 0;
    int nbtristripVertexes = 0;

    for (unsigned int i = 0; i < primitives.size(); ++i)
    {
        osg::PrimitiveSet *ps = primitives[i].get();
        osg::DrawElements *de = ps->getDrawElements();
        if (de && de->getMode() == osg::PrimitiveSet::TRIANGLE_STRIP)
        {
            ++nbtristrip;
            nbtristripVertexes += de->getNumIndices();
        }
    }

    if (nbtristrip > 0)
    {
        osg::notify(osg::NOTICE) << "found " << nbtristrip << " tristrip, "
                                 << "total indices " << nbtristripVertexes
                                 << " should result to " << nbtristripVertexes + nbtristrip * 2
                                 << " after connection" << std::endl;

        osg::DrawElementsUInt *ndw = new osg::DrawElementsUInt(osg::PrimitiveSet::TRIANGLE_STRIP);

        for (unsigned int i = 0; i < primitives.size(); ++i)
        {
            osg::PrimitiveSet *ps = primitives[i].get();
            if (ps && ps->getMode() == osg::PrimitiveSet::TRIANGLE_STRIP)
            {
                osg::DrawElements *de = ps->getDrawElements();
                if (de)
                {
                    // if connection needed insert degenerate triangles
                    if (ndw->getNumIndices() != 0 && ndw->back() != de->getElement(0))
                    {
                        // duplicate last vertex
                        ndw->addElement(ndw->back());
                        // insert first vertex of next strip
                        ndw->addElement(de->getElement(0));
                    }

                    if (ndw->getNumIndices() % 2 != 0)
                    {
                        // add a dummy vertex to reverse the strip
                        ndw->addElement(de->getElement(0));
                    }

                    for (unsigned int j = 0; j < de->getNumIndices(); j++)
                    {
                        ndw->addElement(de->getElement(j));
                    }
                }
            }
        }

        for (int i = primitives.size() - 1; i >= 0; --i)
        {
            osg::PrimitiveSet *ps = primitives[i].get();
            // remove null primitive sets and all primitives that have been merged
            // (i.e. all TRIANGLE_STRIP DrawElements)
            if (!ps || (ps && ps->getMode() == osg::PrimitiveSet::TRIANGLE_STRIP))
            {
                primitives.erase(primitives.begin() + i);
            }
        }

        primitives.insert(primitives.begin(), ndw);
    }
}