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Drew faces in the correct order (from unbounded to inner).

This commit is contained in:
Efi Fogel 2022-05-18 14:04:52 +03:00
parent d1b05fd144
commit e8eb85d5dc
1 changed files with 29 additions and 19 deletions
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42
Arrangement_on_surface_2/include/CGAL/draw_arrangement_2.h
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@ -1,6 +1,8 @@
#ifndef CGAL_DRAW_ARRANGEMENT_2_H
#define CGAL_DRAW_ARRANGEMENT_2_H
#include <map>
#include <CGAL/Qt/Basic_viewer_qt.h>
#include <CGAL/Qt/init_ogl_context.h>
#include <CGAL/Arrangement_2.h>
@ -13,6 +15,7 @@ class Arr_2_viewer_qt : public Basic_viewer_qt {
typedef Basic_viewer_qt Base;
typedef Arrangement_2 Arr;
typedef typename Arr::Point_2 Point;
typedef typename Arr::Face_const_handle Face_const_handle;
public:
/// Construct the viewer.
@ -26,44 +29,51 @@ public:
{ add_elements(); }
protected:
void add_ccb(typename Arr::Ccb_halfedge_const_circulator circ) {
//!
void add_ccb(typename Arr::Ccb_halfedge_const_circulator circ, bool has_area = true) {
typename Arr::Ccb_halfedge_const_circulator curr = circ;
do {
typename Arr::Halfedge_const_handle e = curr;
add_segment(e->source()->point(), e->target()->point());
add_point(e->source()->point());
add_point_in_face(e->source()->point());
if (has_area) add_point_in_face(e->source()->point());
} while (++curr != circ);
}
void add_face(typename Arr::Face_const_handle f, CGAL::IO::Color c) {
if (! f->is_unbounded()) {
//!
void add_face(Face_const_handle face, CGAL::IO::Color c) {
if (! face->is_unbounded()) {
face_begin(c);
add_ccb(f->outer_ccb());
for (auto iv = f->isolated_vertices_begin();
iv != f->isolated_vertices_end(); ++iv)
add_ccb(face->outer_ccb());
for (auto iv = face->isolated_vertices_begin();
iv != face->isolated_vertices_end(); ++iv)
add_point(iv->point());
face_end();
}
for (auto it = f->inner_ccbs_begin(); it != f->inner_ccbs_end(); ++it) {
face_begin(c);
add_ccb(*it);
for (auto iv = f->isolated_vertices_begin();
iv != f->isolated_vertices_end(); ++iv)
add_point(iv->point());
face_end();
std::map<Face_const_handle, bool> visited;
for (auto it = face->inner_ccbs_begin(); it != face->inner_ccbs_end(); ++it) {
auto new_face = (*it)->twin()->face();
if (new_face == face) {
add_ccb(*it, false);
continue;
}
if (visited.find(new_face) != visited.end()) continue;
visited[new_face] = true;
add_face(new_face, c);
}
}
//!
void add_elements() {
clear();
if (m_arr.is_empty()) return;
CGAL::IO::Color c(75,160,255);
for (auto fit = m_arr.faces_begin(); fit != m_arr.faces_end(); ++fit)
add_face(fit, c);
for (auto it = m_arr.unbounded_faces_begin(); it != m_arr.unbounded_faces_end(); ++it)
add_face(it, c);
}
//!
virtual void keyPressEvent(QKeyEvent* e) {
// Test key pressed:
// const ::Qt::KeyboardModifiers modifiers = e->modifiers();