diff --git a/opglwidget.cpp b/opglwidget.cpp
index b2c600c..4d42347 100644
--- a/opglwidget.cpp
+++ b/opglwidget.cpp
@@ -177,4 +177,33 @@ void OPGLWidget::keyReleaseEvent(QKeyEvent *event) {
 	};
 }
 
+void OPGLWidget::mousePressEvent(QMouseEvent *event) {
+	setMouseTracking(true);
+	mouse_loc_old[0] = event -> x();
+	mouse_loc_old[1] = event -> y();
+}
 
+void OPGLWidget::mouseReleaseEvent(QMouseEvent *event) {
+	setMouseTracking(false);
+	mouse_loc_old[0] = event -> x();
+	mouse_loc_old[1] = event -> y();
+}
+
+void OPGLWidget::mouseMoveEvent(QMouseEvent *event) {
+	float delta_x = event->x() - mouse_loc_old[0];
+	float delta_y = event->y() - mouse_loc_old[1];
+	mouse_loc_old[0] = event->x();
+	mouse_loc_old[1] = event->y();
+	for (int i = 0; i < 3; i++) {
+		f[i] += right[i] * delta_x / 1000.0f;
+		f[i] -= up[i] * delta_y / 1000.0f;
+	}
+	right[0] = -f[2];
+	right[2] = f[0];
+	float F_mag = pow(pow(f[0], 2) + pow(f[1], 2) + pow(f[2], 2), 0.5);
+	float right_mag = pow(pow(right[0], 2) + pow(right[1], 2) + pow(right[2], 2), 0.5);
+	for (int i = 0; i < 3; i++) {
+		f[i] = f[i] / F_mag;
+		right[i] = right[i] / right_mag;
+	}
+}
diff --git a/opglwidget.h b/opglwidget.h
index 75bd1dc..10f6908 100644
--- a/opglwidget.h
+++ b/opglwidget.h
@@ -1,6 +1,7 @@
 #include <QtWidgets/QOpenGLWidget>
 #include "obj.h"
 #include <QKeyEvent>
+#include <QMouseEvent>
 
 class OPGLWidget : public QOpenGLWidget
 {
@@ -17,6 +18,9 @@ protected:
 
 	void keyPressEvent(QKeyEvent *event);
 	void keyReleaseEvent(QKeyEvent *event);
+	void mousePressEvent(QMouseEvent *event);
+	void mouseReleaseEvent(QMouseEvent *event);
+	void mouseMoveEvent(QMouseEvent *event);
 
 	int mtl_idx = -1;
 	float loc[3] = {0, 0, 10};
@@ -27,4 +31,5 @@ protected:
 	float speed = 0;
 	ObjectLoader obj;
 	bool key_states[6] = {false, false, false, false, false, false};
+	float mouse_loc_old[2];
 };