-GLfloat specular[] = {1.0, 1.0, 1.0, 1.0};
\ No newline at end of file
+GLfloat specular[] = {1.0, 1.0, 1.0, 1.0};
+
+/* Zoom and rotate tracking */
+GLfloat zoomFactor = 0.0, rotateFactor = 0.0;
+
+/* Beginning width, height */
+int width = 500, height = 500;
\ No newline at end of file