added frame limiting

src/engine.c

@@ -86,6 +86,11 @@ int _engine_run() {
 		update_objects();	// update world objects
 		draw_objects();		// draw world objects
 		swap_buffer();
+
+		while(_delta_time < _min_frame_interval) {
+			timespec_get(&next_time, TIME_UTC);
+			_delta_time = timespec_to_sec(next_time) - timespec_to_sec(start_last_frame);
+		}
 	}
 	return 0;
 }