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
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