Thanks anyway Robert, I was counting from someone else from the community too, someone that might have experience with this piece of the code.
I went to reading the code indeed and I managed it. Nick p.s. osgUtil::Delaunay* are really cool written classes! On Sat, Nov 12, 2016 at 10:38 AM, Robert Osfield <[email protected]> wrote: > Hi Nick, > > The original author of DelaunayTriangulator hasn't been an active > member of the OSG for decade so it's unfortunately a case of reading > the code to work out what is happening. > > I'm afraid it doesn't make much sense for me to go read your code, > read the DelaunayTriangulator code and work out what is going on, then > try to communicate my findings to you, it's just way more efficient to > dive into the code yourself. > > Robert. > > On 11 November 2016 at 18:18, Trajce Nikolov NICK > <[email protected]> wrote: > > Hi Community, > > > > I hope you will help this time too. Struggling again :-). > > > > I am trying to add cultural features to terrain models, nothing fancy > (yet! > > :-) ) it is simple. Code will describe it more how I am doing it but it > is > > the very basic, elevations array to be triangulated with some > constraints. > > And it works nicely. However when I want to cut the triangulated > constraint > > from the terrain, and add this cut triangles as separate primitive set, > > constraint->getTriangles() is empty. Based on the doxygen in the header > I am > > expecting to have these triangles there: > > > > /** Get the filling primitive. One: > > * triangulate must have bneen called and > > * two: triangle list is filled when > > * DelaunayTriangulator::removeInternalTriangles is called. > > * These return the triangles removed from the delaunay > triangulation by > > * DelaunayTriangulator::removeInternalTriangles. */ > > inline const osg::DrawElementsUInt *getTriangles() const { return > > prim_tris_.get(); } > > > > No triangles when calling this and this is the snippet: > > > > osg::ref_ptr<osgUtil::DelaunayTriangulator> triangulator = new > > osgUtil::DelaunayTriangulator; > > > > osg::ref_ptr<osg::Vec3Array> polyline = getPolylineVertices(line); > > osg::ref_ptr<osg::Vec3Array> polylineEdges = getEdges(polyline); > > > > constraint->setVertexArray(polylineEdges); > > constraint->addPrimitiveSet(new osg::DrawArrays(GL_LINE_LOOP, 0, > > polylineEdges->size())); > > > > triangulator->addInputConstraint(constraint); > > triangulator->setInputPointArray(_points); > > triangulator->triangulate(); > > triangulator->removeInternalTriangles(constraint); > > > > osg::ref_ptr<osg::Geometry> geometry = new osg::Geometry; > > geometry->setVertexArray(_points); > > geometry->addPrimitiveSet(triangulator->getTriangles()); // triangles > with > > constraint cut > > geometry->addPrimitiveSet(constraint->getTriangles()); // no triangles > > > > Thanks a bunch as always! > > > > Nick > > > > -- > > trajce nikolov nick > > > > _______________________________________________ > > osg-users mailing list > > [email protected] > > http://lists.openscenegraph.org/listinfo.cgi/osg-users- > openscenegraph.org > > > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > -- trajce nikolov nick
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