collider.cpp

/****************************************************************************
** Author: J.-O. Lachaud, University Savoie Mont Blanc
** (vaguely adapted from Qt colliding mices example)
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
****************************************************************************/
 
#include <cmath>
#include <cstdlib>
#include <QtWidgets>
#include "objects.hpp"
 
static const int AsteroidCount = 10;
 
int main(int argc, char **argv)
{
  // Initializes Qt.
  QApplication app(argc, argv);
  // Initializes the random generator.
  srand( QTime(0, 0, 0).secsTo(QTime::currentTime()));
 
  // Creates a graphics scene where we will put graphical objects.
  QGraphicsScene graphical_scene;
  graphical_scene.setSceneRect(0, 0, IMAGE_SIZE, IMAGE_SIZE);
  graphical_scene.setItemIndexMethod(QGraphicsScene::NoIndex);
 
  // We choose to check intersection with 100 random points.
  logical_scene = new LogicalScene( 100 );
 
  // Creates a few asteroids...
  for (int i = 0; i < AsteroidCount; ++i) {
    QColor cok( 150, 130, 110 );
    QColor cko( 255, 240, 0 );
 
    // A master shape gathers all the elements of the shape.
    MasterShape* asteroid = new Asteroid( cok, cko,
                                          ( rand() % 20 + 20 ) / 10.0 /* speed */,
                                          (double) (10 + rand() % 40) /* radius */ );
    // Set direction and position
    asteroid->setRotation(rand() % 360);
    asteroid->setPos( IMAGE_SIZE/2 + ::sin((i * 6.28) / AsteroidCount) * 200,
                      IMAGE_SIZE/2 + ::cos((i * 6.28) / AsteroidCount) * 200 );
    // Add it to the graphical scene
    graphical_scene.addItem( asteroid );
    // and to the logical scene
    logical_scene->formes.push_back( asteroid );
  }
 
 
  // Standard stuff to initialize a graphics view with some background.
  QGraphicsView view(&graphical_scene);
  view.setRenderHint(QPainter::Antialiasing);
  view.setBackgroundBrush(QPixmap(":/images/stars.jpg"));
  view.setCacheMode(QGraphicsView::CacheBackground);
  view.setViewportUpdateMode(QGraphicsView::BoundingRectViewportUpdate);
  view.setDragMode(QGraphicsView::NoDrag); // QGraphicsView::ScrollHandDrag
  view.setWindowTitle(QT_TRANSLATE_NOOP(QGraphicsView, "Space - the final frontier"));
  view.setHorizontalScrollBarPolicy ( Qt::ScrollBarAlwaysOff );
  view.setVerticalScrollBarPolicy ( Qt::ScrollBarAlwaysOff );
  view.resize( IMAGE_SIZE, IMAGE_SIZE );
  view.show();
 
  // Creates a timer that will call `advance()` method regularly.
  QTimer timer;
  QObject::connect(&timer, SIGNAL(timeout()), &graphical_scene, SLOT(advance()));
  timer.start( 30 ); // every 30ms
  
  return app.exec();
}