feat: improved pausing simulation

particle-track-and-trace/src/Program.cpp

@@ -1,3 +1,4 @@
+#include <qurl.h>
 #include <stdexcept>
 #include <vtkRenderWindow.h>
 #include <vtkPointData.h>
@@ -18,6 +19,7 @@
 #include <vtkGenericOpenGLRenderWindow.h>
 #include <vtkCallbackCommand.h>
 #include <vtkInteractorStyleUser.h>
+#include <QKeyEvent>
 
 #include "Program.h"
 #include "commands/TimerCallbackCommand.h"
@@ -130,3 +132,7 @@ vtkSmartPointer<vtkCamera> Program::getCamera() {
 std::vector<Technique *> Program::getTechniques() {
   return this->techniques;
 }
+
+vtkSmartPointer<vtkRenderWindowInteractor> Program::getInteractor() {
+  return this->interact;
+}

particle-track-and-trace/src/Program.h

@@ -81,6 +81,9 @@ public:
 
   std::vector<Technique *> getTechniques();
 
+
+  vtkSmartPointer<vtkRenderWindowInteractor> getInteractor();
+
 };
 
 #endif

particle-track-and-trace/src/QT/MainWindow.cpp

@@ -2,24 +2,28 @@
 #include "ui_mainwindow.h"
 
 #include <QFile>
+#include <QKeyEvent>
 #include <QFileDialog>
 #include <QMessageBox>
 
 #include <vtkDataSetReader.h>
 
-#include "../layers/BackgroundImage.h"
-#include "../layers/EColLayer.h"
-#include "../layers/EGlyphLayer.h"
-#include "../layers/LGlyphLayer.h"
-#include "../layers/LColLayer.h"
 #include "../Program.h"
 #include "../advection/UVGrid.h"
 #include "../advection/kernel/RK4AdvectionKernel.h"
 #include "../advection/kernel/SnapBoundaryConditionKernel.h"
+#include "../commands/TimerCallbackCommand.h"
+#include "../layers/BackgroundImage.h"
+#include "../layers/EColLayer.h"
+#include "../layers/EGlyphLayer.h"
+#include "../layers/LColLayer.h"
+#include "../layers/LGlyphLayer.h"
 #include "../layers/enums.h"
 
 using namespace std;
 
+#define DT 3600
+
 MainWindow::MainWindow(QWidget* parent)
   : QMainWindow(parent)
   , ui(new Ui::MainWindow)
@@ -60,8 +64,8 @@ void MainWindow::setupTechniques() {
   auto kernelRK4_2 = make_unique<RK4AdvectionKernel>(uvGrid);
   auto kernelRK4BoundaryChecked_2 = make_unique<SnapBoundaryConditionKernel>(std::move(kernelRK4_2), uvGrid);
   auto lCol = new LColLayer(uvGrid, std::move(kernelRK4BoundaryChecked_2));
-  lGlyph->setDt(3600);
-  lCol->setDt(3600);
+  lGlyph->setDt(DT);
+  lCol->setDt(DT);
 
   technique1->addLayer(lGlyph);
   technique2->addLayer(lCol); 
@@ -73,10 +77,24 @@ void MainWindow::setupTechniques() {
 
   // TODO: implement feature to call this function on widget
   // l->spoofPoints();
-  // l->cycleGlyphStyle();
+
+  // Setup timer
+  auto intr = program->getInteractor();
+  this->timer = vtkSmartPointer<TimerCallbackCommand>::New(program);
+  this->timer->SetClientData(program);
+  this->timer->setDt(DT);
+  intr->AddObserver(vtkCommand::TimerEvent, this->timer);
+  intr->AddObserver(vtkCommand::KeyPressEvent, this->timer);
+  intr->CreateRepeatingTimer(17); // 60 fps == 1000 / 60 == 16.7 ms per frame
 }
 
 
+void MainWindow::keyPressEvent(QKeyEvent *ev) {
+  if (ev->key() == Qt::Key_Space)  {
+    this->timer->togglePaused();
+  }
+}
+
 /* --------------------------------------------------------------------
  * +                    QTWidget callbacks                            +
  * --------------------------------------------------------------------*/

particle-track-and-trace/src/QT/MainWindow.h

@@ -2,7 +2,7 @@
 #define MAINWINDOW_H
 
 #include <QMainWindow>
-#include "../advection/UVGrid.h"
+#include "../commands/TimerCallbackCommand.h"
 
 namespace Ui {
 class MainWindow;
@@ -15,6 +15,8 @@ public:
   explicit MainWindow(QWidget* parent = 0);
   ~MainWindow();
 
+  void keyPressEvent(QKeyEvent *ev);
+
 private slots:
   void on_FirstButton_clicked(bool checked);
   void on_SecondButton_clicked(bool checked);
@@ -33,6 +35,7 @@ private slots:
 
 private:
   Ui::MainWindow* ui;
+  vtkSmartPointer<TimerCallbackCommand> timer;
 
   void setupTechniques();
 };

particle-track-and-trace/src/commands/TimerCallbackCommand.cpp

@@ -28,6 +28,10 @@ void TimerCallbackCommand::Execute(vtkObject* caller, unsigned long eventId, voi
   }
 }
 
+void TimerCallbackCommand::togglePaused() {
+  this->paused = !this->paused;
+}
+
 void TimerCallbackCommand::setProgram(Program *program) {
   this->program = program;
 }

particle-track-and-trace/src/commands/TimerCallbackCommand.h

@@ -12,6 +12,7 @@ public:
 
   void setProgram(Program *program);
   void setPaused(const bool val);
+  void togglePaused();
 
   void setDt(int dt);