+int CWindowMaskGUI::smooth_mask(int gang)
+{
+ MaskAutos *autos;
+ MaskAuto *keyframe;
+ Track *track;
+ MaskPoint *point;
+ SubMask *mask;
+#ifdef USE_KEYFRAME_SPANNING
+ int create_it = 0;
+#else
+ int create_it = 1;
+#endif
+
+ mwindow->undo->update_undo_before(_("mask smooth"), this);
+
+// Get existing keyframe
+ get_keyframe(track, autos, keyframe,
+ mask, point, create_it);
+ if( track ) {
+#ifdef USE_KEYFRAME_SPANNING
+ MaskAuto temp_keyframe(mwindow->edl, autos);
+ temp_keyframe.copy_data(keyframe);
+ keyframe = &temp_keyframe;
+#endif
+ int k = mwindow->edl->session->cwindow_mask;
+ int n = gang ? keyframe->masks.size() : k+1;
+ for( int j=gang? 0 : k; j<n; ++j ) {
+ SubMask *sub_mask = keyframe->get_submask(j);
+ ArrayList<MaskPoint*> &points = sub_mask->points;
+ int psz = points.size();
+ if( psz < 3 ) continue;
+ for( int i=0; i<psz; ++i ) {
+ int i0 = i-1, i1 = i+1;
+ if( i0 < 0 ) i0 = psz-1;
+ if( i1 >= psz ) i1 = 0;
+ MaskPoint *p0 = points[i0];
+ MaskPoint *p = points[i];
+ MaskPoint *p1 = points[i1];
+ float dx = p1->x - p0->x, dy = p1->y - p0->y;
+ p->control_x1 = -dx/4; p->control_y1 = -dy/4;
+ p->control_x2 = dx/4; p->control_y2 = dy/4;
+ }
+ }
+#ifdef USE_KEYFRAME_SPANNING
+ autos->update_parameter(keyframe);
+#endif
+ update_preview();
+ }
+
+ mwindow->undo->update_undo_after(_("mask smooth"), LOAD_AUTOMATION);
+ return 1;
+}
+