mirror of https://github.com/CGAL/cgal
327 lines
8.3 KiB
C++
327 lines
8.3 KiB
C++
#include <fstream>
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#include <boost/config.hpp>
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#include <boost/version.hpp>
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// CGAL headers
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#include <CGAL/Exact_predicates_inexact_constructions_kernel.h>
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#include <CGAL/Delaunay_triangulation_2.h>
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#include <CGAL/Alpha_shape_2.h>
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#include <CGAL/Alpha_shape_face_base_2.h>
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#include <CGAL/Alpha_shape_vertex_base_2.h>
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#if (! defined(BOOST_GCC) || BOOST_GCC >= 40500)
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#include <CGAL/IO/WKT.h>
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#endif
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#include <CGAL/point_generators_2.h>
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// Qt headers
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#include <QtGui>
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#include <QString>
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#include <QActionGroup>
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#include <QFileDialog>
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#include <QInputDialog>
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// GraphicsView items and event filters (input classes)
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#include <CGAL/Qt/AlphaShapeGraphicsItem.h>
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#include <CGAL/Qt/GraphicsViewPolylineInput.h>
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// for viewportsBbox
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#include <CGAL/Qt/utility.h>
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// the two base classes
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#include "ui_Alpha_shapes_2.h"
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#include <CGAL/Qt/DemosMainWindow.h>
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typedef CGAL::Exact_predicates_inexact_constructions_kernel K;
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typedef K::Point_2 Point_2;
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typedef K::Iso_rectangle_2 Iso_rectangle_2;
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typedef CGAL::Alpha_shape_vertex_base_2<K> Vb;
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typedef CGAL::Alpha_shape_face_base_2<K> Fb;
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typedef CGAL::Triangulation_data_structure_2<Vb,Fb> Tds;
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typedef CGAL::Delaunay_triangulation_2<K, Tds> Delaunay;
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typedef CGAL::Alpha_shape_2<Delaunay> Alpha_shape_2;
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typedef Alpha_shape_2::Alpha_iterator Alpha_iterator;
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class MainWindow :
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public CGAL::Qt::DemosMainWindow,
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public Ui::Alpha_shapes_2
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{
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Q_OBJECT
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private:
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double alpha;
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std::vector<Point_2> points;
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Alpha_shape_2 as;
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QGraphicsScene scene;
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CGAL::Qt::AlphaShapeGraphicsItem<Alpha_shape_2> * agi;
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CGAL::Qt::GraphicsViewPolylineInput<K> * pi;
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public:
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MainWindow();
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public Q_SLOTS:
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void processInput(CGAL::Object o);
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void alphaChanged(int i);
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void on_actionInsertRandomPoints_triggered();
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void on_actionLoadPoints_triggered();
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void on_actionClear_triggered();
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void on_actionRecenter_triggered();
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void open(QString fileName);
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Q_SIGNALS:
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void changed();
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};
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MainWindow::MainWindow()
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: DemosMainWindow()
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{
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setupUi(this);
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this->graphicsView->setAcceptDrops(false);
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// Add a GraphicItem for the alpha shape
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agi = new CGAL::Qt::AlphaShapeGraphicsItem<Alpha_shape_2>(&as);
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QObject::connect(this, SIGNAL(changed()),
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agi, SLOT(modelChanged()));
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agi->setVerticesPen(QPen(Qt::red, 3, Qt::SolidLine, Qt::RoundCap, Qt::RoundJoin));
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agi->setEdgesPen(QPen(Qt::lightGray, 0, Qt::SolidLine, Qt::RoundCap, Qt::RoundJoin));
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agi->setRegularEdgesPen(QPen(Qt::blue, 0, Qt::SolidLine, Qt::RoundCap, Qt::RoundJoin));
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agi->setSingularEdgesPen(QPen(Qt::cyan, 0, Qt::SolidLine, Qt::RoundCap, Qt::RoundJoin));
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agi->setRegularFacesBrush(QBrush(Qt::cyan));
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scene.addItem(agi);
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//
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// Manual handling of actions
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//
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QObject::connect(this->alphaSlider, SIGNAL(valueChanged(int)),
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this, SLOT(alphaChanged(int)));
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QObject::connect(this->alphaBox, SIGNAL(valueChanged(int)),
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this, SLOT(alphaChanged(int)));
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QObject::connect(this->alphaSlider, SIGNAL(valueChanged(int)),
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this->alphaBox, SLOT(setValue(int)));
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QObject::connect(this->alphaBox, SIGNAL(valueChanged(int)),
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this->alphaSlider, SLOT(setValue(int)));
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QObject::connect(this->actionQuit, SIGNAL(triggered()),
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this, SLOT(close()));
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pi = new CGAL::Qt::GraphicsViewPolylineInput<K>(this, &scene, 1, false); // inputs a list with one point
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QObject::connect(pi, SIGNAL(generate(CGAL::Object)),
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this, SLOT(processInput(CGAL::Object)));
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scene.installEventFilter(pi);
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//this->actionShowAlphaShape->setChecked(true);
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//
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// Setup the scene and the view
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//
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scene.setItemIndexMethod(QGraphicsScene::NoIndex);
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scene.setSceneRect(-100, -100, 100, 100);
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this->graphicsView->setScene(&scene);
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this->graphicsView->setMouseTracking(true);
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// Turn the vertical axis upside down
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this->graphicsView->transform().scale(1, -1);
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// The navigation adds zooming and translation functionality to the
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// QGraphicsView
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this->addNavigation(this->graphicsView);
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this->setupStatusBar();
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this->setupOptionsMenu();
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this->addAboutDemo(":/cgal/help/about_Alpha_shapes_2.html");
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this->addAboutCGAL();
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this->addRecentFiles(this->menuFile, this->actionQuit);
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connect(this, SIGNAL(openRecentFile(QString)),
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this, SLOT(open(QString)));
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}
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void
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MainWindow::processInput(CGAL::Object o)
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{
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std::list<Point_2> input;
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if(CGAL::assign(input, o)){
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if(input.size() == 1) {
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points.push_back(input.front());
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as.make_alpha_shape(points.begin(), points.end());
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as.set_alpha(alpha);
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}
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Q_EMIT( changed());
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}
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}
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void MainWindow::alphaChanged(int i)
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{
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if (as.number_of_alphas() > 0){
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if(i < 100){
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int n = static_cast<int>((i * as.number_of_alphas())/ 100);
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if(n == 0) n++;
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alpha = as.get_nth_alpha(n);
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as.set_alpha(alpha);
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} else {
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Alpha_iterator alpha_end_it = as.alpha_end();
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alpha = (*(--alpha_end_it))+1;
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as.set_alpha(alpha);
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}
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} else {
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alpha = 0;
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as.set_alpha(0);
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}
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Q_EMIT( changed());
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}
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/*
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* Qt Automatic Connections
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* https://doc.qt.io/qt-5/designer-using-a-ui-file.html#automatic-connections
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*
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* setupUi(this) generates connections to the slots named
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* "on_<action_name>_<signal_name>"
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*/
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void
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MainWindow::on_actionClear_triggered()
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{
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as.clear();
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points.clear();
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Q_EMIT( changed());
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}
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void
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MainWindow::on_actionInsertRandomPoints_triggered()
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{
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QRectF rect = CGAL::Qt::viewportsBbox(&scene);
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CGAL::Qt::Converter<K> convert;
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Iso_rectangle_2 isor = convert(rect);
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CGAL::Random_points_in_iso_rectangle_2<Point_2> pg((isor.min)(), (isor.max)());
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bool ok = false;
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const int number_of_points =
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QInputDialog::getInt(this,
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tr("Number of random points"),
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tr("Enter number of random points"),
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100,
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0,
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(std::numeric_limits<int>::max)(),
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1,
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&ok);
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if(!ok) {
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return;
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}
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// wait cursor
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QApplication::setOverrideCursor(Qt::WaitCursor);
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points.reserve(points.size() + number_of_points);
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for(int i = 0; i < number_of_points; ++i){
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points.push_back(*pg++);
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}
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as.make_alpha_shape(points.begin(), points.end());
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as.set_alpha(alpha);
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// default cursor
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QApplication::restoreOverrideCursor();
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Q_EMIT( changed());
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}
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void
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MainWindow::on_actionLoadPoints_triggered()
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{
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QString fileName = QFileDialog::getOpenFileName(this,
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tr("Open Points file"),
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".",
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tr("CGAL files (*.pts.cgal);;"
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#if (! defined(BOOST_GCC) || BOOST_GCC >= 40500)
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"WKT files (*.wktk *.WKT);;"
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#endif
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"All files (*)"));
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if(! fileName.isEmpty()){
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open(fileName);
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}
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}
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void
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MainWindow::open(QString fileName)
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{
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std::cerr << "open " << std::endl;
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std::cerr << qPrintable(fileName) << std::endl;
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// wait cursor
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QApplication::setOverrideCursor(Qt::WaitCursor);
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std::ifstream ifs(qPrintable(fileName));
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if(fileName.endsWith(".wkt",Qt::CaseInsensitive))
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{
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#if (! defined(BOOST_GCC) || BOOST_GCC >= 40500)
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CGAL::read_multi_point_WKT(ifs, points);
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#endif
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}
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else
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{
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K::Point_2 p;
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while(ifs >> p) {
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points.push_back(p);
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}
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}
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as.make_alpha_shape(points.begin(), points.end());
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as.set_alpha(alpha);
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// default cursor
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QApplication::restoreOverrideCursor();
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this->addToRecentFiles(fileName);
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actionRecenter->trigger();
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Q_EMIT( changed());
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}
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void
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MainWindow::on_actionRecenter_triggered()
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{
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this->graphicsView->setSceneRect(agi->boundingRect());
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this->graphicsView->fitInView(agi->boundingRect(), Qt::KeepAspectRatio);
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}
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#include "Alpha_shapes_2.moc"
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#include <CGAL/Qt/resources.h>
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int main(int argc, char **argv)
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{
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QApplication app(argc, argv);
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app.setOrganizationDomain("geometryfactory.com");
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app.setOrganizationName("GeometryFactory");
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app.setApplicationName("Alpha_shape_2 demo");
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// Import resources from libCGAL (Qt5).
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CGAL_QT_INIT_RESOURCES;
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MainWindow mainWindow;
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mainWindow.show();
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return app.exec();
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}
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