diff --git a/main.cpp b/main.cpp
index ae41cf3..6ae7c06 100644
--- a/main.cpp
+++ b/main.cpp
@@ -44,6 +44,31 @@ void draw(const std::vector<Point> &points)
 	glutPostRedisplay();
 }
 
+void draw_origin()
+{
+	glBegin(GL_LINES);
+
+	// X:
+	glColor3d(255, 0, 0);
+	glVertex3f(-1.0f, 0.0f, 0.0f);
+	glColor3d(0, 0, 0);
+	glVertex3f(10.0f, 0.0f, 0.0f);
+
+	// Y:
+	glColor3d(0, 255, 0);
+	glVertex3f(0.0f, -1.0f, 0.0f);
+	glColor3d(0, 0, 0);
+	glVertex3f(0.0f, 10.0f, 0.0f);
+
+	// Z:
+	glColor3d(0, 0, 255);
+	glVertex3f(0.0f, 0.0f, -10.0f);
+	glColor3d(0, 0, 0);
+	glVertex3f(0.0f, 0.0f, 10.0f);
+
+	glEnd();
+}
+
 void display()
 {
 	// RESET:
@@ -58,6 +83,8 @@ void display()
 	          0.0, 6.0, 0.0,  /* center is at */
 	          0.0, 1.0, 0.0);    /* up is in positive Y direction */
 
+	draw_origin();
+
 	// DRAW TRACKS:
 	for(auto track : tracks)
 		draw(track);
@@ -105,7 +132,7 @@ int main(int argc, char *argv[])
 	{
 		auto extension = entry.path().extension();
 		if(extension == ".gpx")
-			files.push_back(entry.path().filename());
+			files.push_back(entry.path().string());
 	}
 
 	float file_diff_lat = -8;