diff --git a/src/drone_controller.cc b/src/drone_controller.cc
index 58f0359..0a98a63 100644
--- a/src/drone_controller.cc
+++ b/src/drone_controller.cc
@@ -262,12 +262,11 @@ void DroneController::computeCollisions(double sphere_radius) {
 
 
 void DroneController::computeSpeedingViolations(double speed) {
-	speed_violations.clear();
+	speed_limit = speed;
 	for (int i = 0; i < duration; i++) {
 		for (Drone &d : drones) {
 			d.setTo(i);
 			if (d.getSpeed() > speed) {
-				speed_violations[i].append(d.getId());
 				emit speedViolation(d.getId(), d.getSpeed(), i);
 			}
 		}
diff --git a/src/drone_controller.hh b/src/drone_controller.hh
index 3c09089..3ffe797 100644
--- a/src/drone_controller.hh
+++ b/src/drone_controller.hh
@@ -25,7 +25,6 @@ class DroneController : public QObject, public Painter {
 	QMap<int, QVector<QPair<int, int>>> collisions;
 	bool draw_trajectories = false;
 	bool draw_guides = false;
-	QMap<int, QVector<int>> speed_violations;
 	double speed_limit = 0;
 
 	static OpenGLMesh *sphere;
diff --git a/src/main_window.cc b/src/main_window.cc
index 39261dd..ad3a7fe 100644
--- a/src/main_window.cc
+++ b/src/main_window.cc
@@ -92,11 +92,13 @@ void MainWindow::open(const QString &path) {
 			dc, &DroneController::computeCollisions);
 	connect(settings_pane, &SettingsPane::sphereRadiusChanged,
 			dc, &DroneController::displaySpheres);
+	dc->computeCollisions(settings_pane->getSphereRadius());
 
 	connect(settings_pane, &SettingsPane::speedLimitChanged,
 			[&](double _) { Q_UNUSED(_); settings_pane->clearSpeedingViolations(); });
 	connect(settings_pane, &SettingsPane::speedLimitChanged,
 			dc, &DroneController::computeSpeedingViolations);
+	dc->computeSpeedingViolations(settings_pane->getSpeedLimit());
 
 	connect(settings_pane, &SettingsPane::toggledTrajectories,
 			dc, &DroneController::setDrawTrajectories);
diff --git a/src/settings_pane.cc b/src/settings_pane.cc
index e580d37..856c45c 100644
--- a/src/settings_pane.cc
+++ b/src/settings_pane.cc
@@ -10,18 +10,24 @@
 
 SettingsPane::SettingsPane(QWidget *parent)
 	:QWidget(parent) {
-	QDoubleSpinBox *sphere_radius = new QDoubleSpinBox();
-	sphere_radius->setSingleStep(.1);
-	QDoubleSpinBox *speed_limit = new QDoubleSpinBox();
-	speed_limit->setSingleStep(.1);
+	QDoubleSpinBox *sphere_radius_input = new QDoubleSpinBox();
+	sphere_radius_input->setSingleStep(.1);
+	sphere_radius_input->setValue(sphere_radius);
+	QDoubleSpinBox *speed_limit_input = new QDoubleSpinBox();
+	speed_limit_input->setSingleStep(.1);
+	speed_limit_input->setValue(speed_limit);
 	QCheckBox *show_trajectories = new QCheckBox();
 	QCheckBox *show_guides = new QCheckBox();
 	collisions = new QListWidget();
 	speeding_violations = new QListWidget();
 
-	connect(sphere_radius, QOverload<double>::of(&QDoubleSpinBox::valueChanged),
+	connect(sphere_radius_input, QOverload<double>::of(&QDoubleSpinBox::valueChanged),
+			[&](double radius) { sphere_radius = radius; });
+	connect(sphere_radius_input, QOverload<double>::of(&QDoubleSpinBox::valueChanged),
 			this, &SettingsPane::sphereRadiusChanged);
-	connect(speed_limit, QOverload<double>::of(&QDoubleSpinBox::valueChanged),
+	connect(speed_limit_input, QOverload<double>::of(&QDoubleSpinBox::valueChanged),
+			[&](double speed) { speed_limit = speed; });
+	connect(speed_limit_input, QOverload<double>::of(&QDoubleSpinBox::valueChanged),
 			this, &SettingsPane::speedLimitChanged);
 	connect(show_trajectories, &QCheckBox::stateChanged,
 			this, &SettingsPane::toggledTrajectories);
@@ -35,8 +41,8 @@ SettingsPane::SettingsPane(QWidget *parent)
 	QTabWidget *tabs = new QTabWidget();
 
 	QFormLayout *layout = new QFormLayout;
-	layout->addRow("Taille de la sphère de collision", sphere_radius);
-	layout->addRow("Limite de vitesse", speed_limit);
+	layout->addRow("Taille de la sphère de collision", sphere_radius_input);
+	layout->addRow("Limite de vitesse", speed_limit_input);
 	layout->addRow("Afficher les trajectoires", show_trajectories);
 	layout->addRow("Afficher les guides", show_guides);
 
@@ -48,6 +54,15 @@ SettingsPane::SettingsPane(QWidget *parent)
 }
 
 
+double SettingsPane::getSphereRadius() const {
+	return sphere_radius;
+}
+
+double SettingsPane::getSpeedLimit() const {
+	return speed_limit;
+}
+
+
 void SettingsPane::addCollision(int idA, int idB, int frame) {
 	BookmarkItem *item = new BookmarkItem("Frame " + QString::number(frame) + ": #"
 										  + QString::number(idA) + " et #" + QString::number(idB),
diff --git a/src/settings_pane.hh b/src/settings_pane.hh
index 8b92690..49fd194 100644
--- a/src/settings_pane.hh
+++ b/src/settings_pane.hh
@@ -22,9 +22,13 @@ class SettingsPane : public QWidget {
 
 	QListWidget *collisions = nullptr;
 	QListWidget *speeding_violations = nullptr;
+	double sphere_radius = .6;
+	double speed_limit = .5;
 
 public:
 	SettingsPane(QWidget *parent=nullptr);
+	double getSphereRadius() const;
+	double getSpeedLimit() const;
 
 public slots:
 	void addCollision(int idA, int idB, int frame);