+ nframes64_t frame_delta = 0;
+
+ bool left_direction = false;
+ if (last_pointer_frame() > pf) {
+ left_direction = true;
+ }
+
+ if (left_direction) {
+ frame_delta = (last_pointer_frame() - pf);
+ } else {
+ frame_delta = (pf - last_pointer_frame());
+ }
+