// Copyright(c) 2018 INRIA Sophia-Antipolis (France). // All rights reserved. // // This file is part of CGAL (www.cgal.org). // // $URL: https://github.com/CGAL/cgal/blob/v5.2/Straight_skeleton_2/include/CGAL/draw_straight_skeleton_2.h $ // $Id: draw_straight_skeleton_2.h dd49cb6 2020-11-06T10:10:11+01:00 Sébastien Loriot // SPDX-License-Identifier: GPL-3.0-or-later OR LicenseRef-Commercial // // Author(s) : Guillaume Damiand #ifndef CGAL_DRAW_SS2_H #define CGAL_DRAW_SS2_H #include #include #ifdef CGAL_USE_BASIC_VIEWER #include #include #include namespace CGAL { // Default color functor; user can change it to have its own face color struct DefaultColorFunctorSS2 { template static CGAL::Color run(const SS2&, const typename SS2::Finite_faces_iterator fh) { CGAL::Random random((unsigned int)(std::size_t)(&*fh)); return get_random_color(random); } }; // Viewer class for SS2 template class SimpleStraightSkeleton2ViewerQt : public Basic_viewer_qt { typedef Basic_viewer_qt Base; typedef typename SS2::Vertex_const_handle Vertex_const_handle; typedef typename SS2::Halfedge_const_handle Halfedge_const_handle; // typedef typename SS2::Point Point; public: /// Construct the viewer. /// @param ass2 the ss2 to view /// @param title the title of the window SimpleStraightSkeleton2ViewerQt(QWidget* parent, const SS2& ass2, const char* title="Basic SS2 Viewer", const ColorFunctor& fcolor=ColorFunctor()) : // First draw: vertices; edges, faces; multi-color; no inverse normal Base(parent, title, true, true, true, false, false), ss2(ass2), m_fcolor(fcolor) { compute_elements(); } protected: /* void compute_face(Facet_const_handle fh) { CGAL::Color c=m_fcolor.run(ss2, fh); face_begin(c); add_point_in_face(fh->vertex(0)->point()); add_point_in_face(fh->vertex(1)->point()); add_point_in_face(fh->vertex(2)->point()); face_end(); } */ void compute_edge(Halfedge_const_handle eh) { if(eh->is_bisector()) add_segment(eh->opposite()->vertex()->point(), eh->vertex()->point(), CGAL::red()); else add_segment(eh->opposite()->vertex()->point(), eh->vertex()->point(), CGAL::black()); } void print_halfedge_labels(Halfedge_const_handle h) { std::stringstream label; label << "H" << h->id() << " (V" << h->vertex()->id() << ") "; label << "H" << h->opposite()->id() << " (V" << h->opposite()->vertex()->id() << ") "; add_text(CGAL::midpoint(h->opposite()->vertex()->point(), h->vertex()->point()), label.str()); } void compute_vertex(Vertex_const_handle vh) { if(vh->is_split()) add_point(vh->point(), CGAL::Color(10,10,180)); // blue, but not flashy else if(vh->has_infinite_time()) add_point(vh->point(), CGAL::orange()); else add_point(vh->point(), CGAL::Color(10,180,10)); // green, but not flashy } void print_vertex_label(Vertex_const_handle vh) { std::stringstream label; label << "V" << vh->id() << std::ends; add_text(vh->point(), label.str()); } void compute_elements() { clear(); for (typename SS2::Halfedge_const_iterator it=ss2.halfedges_begin(); it!=ss2.halfedges_end(); ++it) { if(it->id() < it->opposite()->id()) { compute_edge(it); print_halfedge_labels(it); } } for (typename SS2::Vertex_const_iterator it=ss2.vertices_begin(); it!=ss2.vertices_end(); ++it) { compute_vertex(it); print_vertex_label(it); } } virtual void keyPressEvent(QKeyEvent *e) { // Test key pressed: // const ::Qt::KeyboardModifiers modifiers = e->modifiers(); // if ((e->key()==Qt::Key_PageUp) && (modifiers==Qt::NoButton)) { ... } // Call: * compute_elements() if the model changed, followed by // * redraw() if some viewing parameters changed that implies some // modifications of the buffers // (eg. type of normal, color/mono) // * update() just to update the drawing // Call the base method to process others/classicals key Base::keyPressEvent(e); } protected: const SS2& ss2; const ColorFunctor& m_fcolor; }; // Specialization of draw function. #define CGAL_SS_TYPE CGAL::Straight_skeleton_2 template void draw(const CGAL_SS_TYPE& ass2, const char* title="Straight Skeleton Basic Viewer") { #if defined(CGAL_TEST_SUITE) bool cgal_test_suite=true; #else bool cgal_test_suite=qEnvironmentVariableIsSet("CGAL_TEST_SUITE"); #endif if (!cgal_test_suite) { int argc=1; const char* argv[2]={"ss2_viewer","\0"}; QApplication app(argc,const_cast(argv)); DefaultColorFunctorSS2 fcolor; SimpleStraightSkeleton2ViewerQt mainwindow(app.activeWindow(), ass2, title, fcolor); mainwindow.show(); app.exec(); } } #undef CGAL_SS_TYPE } // End namespace CGAL #endif // CGAL_USE_BASIC_VIEWER #endif // CGAL_DRAW_SS2_H