Object tracking; initial commit

This commit implements basis stuff needed for object tracking,
use case isn't perfect now, interface also should be cleaned a bit.

- Added list of objects to be tracked. Default there's only one object called
  "Camera" which is used for solving camera motion. Other objects can be added
  and each of them will have it;s own list of tracks. Only one object can be used
  for camera solving at this moment.
- Added new constraint called "Object Tracking" which makes oriented object be
  moving in the save way as solved object motion.
- Scene orientation tools can be used for orienting object to bundles.
- All tools which works with list of tracks or reconstruction data now
  gets that lists from active editing object.
- All objects and their tracking data are available via python api.

8 files changed, 377 insertions, 140 deletions

diff --git a/source/blender/editors/space_clip/clip_draw.c b/source/blender/editors/space_clip/clip_draw.c
index 3f9ec3f3c82..8f2398b156b 100644
--- a/source/blender/editors/space_clip/clip_draw.c
+++ b/source/blender/editors/space_clip/clip_draw.c
@@ -96,6 +96,7 @@ static void draw_movieclip_cache(SpaceClip *sc, ARegion *ar, MovieClip *clip, Sc
 	float x;
 	int *points, totseg, i, a;
 	float sfra= SFRA, efra= EFRA, framelen= ar->winx/(efra-sfra+1);
+	MovieTrackingTrack *act_track= BKE_tracking_active_track(&clip->tracking);
 
 	glEnable(GL_BLEND);
 
@@ -119,8 +120,8 @@ static void draw_movieclip_cache(SpaceClip *sc, ARegion *ar, MovieClip *clip, Sc
 	}
 
 	/* track */
-	if(clip->tracking.act_track) {
-		MovieTrackingTrack *track= clip->tracking.act_track;
+	if(act_track) {
+		MovieTrackingTrack *track= act_track;
 
 		for(i= sfra, a= 0; i <= efra; i++) {
 			int framenr;
@@ -835,8 +836,9 @@ static void draw_tracking_tracks(SpaceClip *sc, ARegion *ar, MovieClip *clip,
 {
 	float x, y;
 	MovieTracking* tracking= &clip->tracking;
-	MovieTrackingMarker *marker;
+	ListBase *tracksbase= BKE_tracking_get_tracks(tracking);
 	MovieTrackingTrack *track, *act_track;
+	MovieTrackingMarker *marker;
 	int framenr= sc->user.framenr;
 	int undistort= sc->user.render_flag&MCLIP_PROXY_RENDER_UNDISTORT;
 	float *marker_pos= NULL, *fp, *active_pos= NULL, cur_pos[2];
@@ -858,13 +860,13 @@ static void draw_tracking_tracks(SpaceClip *sc, ARegion *ar, MovieClip *clip,
 	glMultMatrixf(sc->stabmat);
 	glScalef(width, height, 0);
 
-	act_track= clip->tracking.act_track;
+	act_track= BKE_tracking_active_track(tracking);
 
 	if(sc->user.render_flag&MCLIP_PROXY_RENDER_UNDISTORT) {
 		int count= 0;
 
 		/* count */
-		track= tracking->tracks.first;
+		track= tracksbase->first;
 		while(track) {
 			if((track->flag&TRACK_HIDDEN)==0) {
 				marker= BKE_tracking_get_marker(track, framenr);
@@ -880,7 +882,7 @@ static void draw_tracking_tracks(SpaceClip *sc, ARegion *ar, MovieClip *clip,
 		if(count) {
 			marker_pos= MEM_callocN(2*sizeof(float)*count, "draw_tracking_tracks marker_pos");
 
-			track= tracking->tracks.first;
+			track= tracksbase->first;
 			fp= marker_pos;
 			while(track) {
 				if((track->flag&TRACK_HIDDEN)==0) {
@@ -902,7 +904,7 @@ static void draw_tracking_tracks(SpaceClip *sc, ARegion *ar, MovieClip *clip,
 	}
 
 	if(sc->flag&SC_SHOW_TRACK_PATH) {
-		track= tracking->tracks.first;
+		track= tracksbase->first;
 		while(track) {
 			if((track->flag&TRACK_HIDDEN)==0)
 				draw_track_path(sc, clip, track);
@@ -912,7 +914,7 @@ static void draw_tracking_tracks(SpaceClip *sc, ARegion *ar, MovieClip *clip,
 	}
 
 	/* markers outline and non-selected areas */
-	track= tracking->tracks.first;
+	track= tracksbase->first;
 	fp= marker_pos;
 	while(track) {
 		if((track->flag&TRACK_HIDDEN)==0) {
@@ -936,7 +938,7 @@ static void draw_tracking_tracks(SpaceClip *sc, ARegion *ar, MovieClip *clip,
 
 	/* selected areas only, so selection wouldn't be overlapped by
 	   non-selected areas */
-	track= tracking->tracks.first;
+	track= tracksbase->first;
 	fp= marker_pos;
 	while(track) {
 		if((track->flag&TRACK_HIDDEN)==0) {
@@ -974,15 +976,16 @@ static void draw_tracking_tracks(SpaceClip *sc, ARegion *ar, MovieClip *clip,
 	}
 
 	if(sc->flag&SC_SHOW_BUNDLES) {
+		MovieTrackingObject *object= BKE_tracking_active_object(tracking);
 		float pos[4], vec[4], mat[4][4], aspy;
 
 		glEnable(GL_POINT_SMOOTH);
 		glPointSize(3.0f);
 
 		aspy= 1.0f/clip->tracking.camera.pixel_aspect;
-		BKE_tracking_projection_matrix(tracking, framenr, width, height, mat);
+		BKE_tracking_projection_matrix(tracking, object, framenr, width, height, mat);
 
-		track= tracking->tracks.first;
+		track= tracksbase->first;
 		while(track) {
 			if((track->flag&TRACK_HIDDEN)==0 && track->flag&TRACK_HAS_BUNDLE) {
 				marker= BKE_tracking_get_marker(track, framenr);
@@ -1027,7 +1030,7 @@ static void draw_tracking_tracks(SpaceClip *sc, ARegion *ar, MovieClip *clip,
 
 	if(sc->flag&SC_SHOW_NAMES) {
 		/* scaling should be cleared before drawing texts, otherwise font would also be scaled */
-		track= tracking->tracks.first;
+		track= tracksbase->first;
 		fp= marker_pos;
 		while(track) {
 			if((track->flag&TRACK_HIDDEN)==0) {
diff --git a/source/blender/editors/space_clip/clip_editor.c b/source/blender/editors/space_clip/clip_editor.c
index c5036145792..d75df0ab51e 100644
--- a/source/blender/editors/space_clip/clip_editor.c
+++ b/source/blender/editors/space_clip/clip_editor.c
@@ -171,12 +171,13 @@ static int selected_boundbox(SpaceClip *sc, float min[2], float max[2])
 	MovieClip *clip= ED_space_clip(sc);
 	MovieTrackingTrack *track;
 	int width, height, ok= 0;
+	ListBase *tracksbase= BKE_tracking_get_tracks(&clip->tracking);
 
 	INIT_MINMAX2(min, max);
 
 	ED_space_clip_size(sc, &width, &height);
 
-	track= clip->tracking.tracks.first;
+	track= tracksbase->first;
 	while(track) {
 		if(TRACK_VIEW_SELECTED(sc, track)) {
 			MovieTrackingMarker *marker= BKE_tracking_get_marker(track, sc->user.framenr);
diff --git a/source/blender/editors/space_clip/clip_graph_draw.c b/source/blender/editors/space_clip/clip_graph_draw.c
index 7b14783d4ca..d1e7c86d473 100644
--- a/source/blender/editors/space_clip/clip_graph_draw.c
+++ b/source/blender/editors/space_clip/clip_graph_draw.c
@@ -177,6 +177,7 @@ static void draw_tracks_curves(View2D *v2d, SpaceClip *sc)
 {
 	MovieClip *clip= ED_space_clip(sc);
 	MovieTracking *tracking= &clip->tracking;
+	MovieTrackingTrack *act_track= BKE_tracking_active_track(tracking);
 	int width, height;
 	struct { MovieTrackingTrack *act_track; int sel; float xscale, yscale, hsize; } userdata;
 
@@ -188,13 +189,13 @@ static void draw_tracks_curves(View2D *v2d, SpaceClip *sc)
 	/* non-selected knot handles */
 	userdata.hsize= UI_GetThemeValuef(TH_HANDLE_VERTEX_SIZE);
 	userdata.sel= 0;
-	userdata.act_track= clip->tracking.act_track;
+	userdata.act_track= act_track;
 	UI_view2d_getscale(v2d, &userdata.xscale, &userdata.yscale);
 	clip_graph_tracking_values_iterate(sc, &userdata, tracking_segment_knot_cb, NULL, NULL);
 
 	/* draw graph lines */
 	glEnable(GL_BLEND);
-	clip_graph_tracking_values_iterate(sc, tracking->act_track, tracking_segment_point_cb, tracking_segment_start_cb, tracking_segment_end_cb);
+	clip_graph_tracking_values_iterate(sc, act_track, tracking_segment_point_cb, tracking_segment_start_cb, tracking_segment_end_cb);
 	glDisable(GL_BLEND);
 
 	/* selected knot handles on top of curves */
diff --git a/source/blender/editors/space_clip/clip_graph_ops.c b/source/blender/editors/space_clip/clip_graph_ops.c
index 56ca1632bae..08d6bcf47bc 100644
--- a/source/blender/editors/space_clip/clip_graph_ops.c
+++ b/source/blender/editors/space_clip/clip_graph_ops.c
@@ -155,13 +155,14 @@ static int mouse_select_knot(bContext *C, float co[2], int extend)
 	ARegion *ar= CTX_wm_region(C);
 	View2D *v2d= &ar->v2d;
 	MovieTracking *tracking= &clip->tracking;
+	MovieTrackingTrack *act_track= BKE_tracking_active_track(tracking);
 	static const int delta= 6;
 
-	if(tracking->act_track) {
+	if(act_track) {
 		MouseSelectUserData userdata;
 
 		mouse_select_init_data(&userdata, co);
-		clip_graph_tracking_values_iterate_track(sc, tracking->act_track,
+		clip_graph_tracking_values_iterate_track(sc, act_track,
 					&userdata, find_nearest_tracking_knot_cb, NULL, NULL);
 
 		if(userdata.marker) {
@@ -191,6 +192,7 @@ static int mouse_select_curve(bContext *C, float co[2], int extend)
 	SpaceClip *sc= CTX_wm_space_clip(C);
 	MovieClip *clip= ED_space_clip(sc);
 	MovieTracking *tracking= &clip->tracking;
+	MovieTrackingTrack *act_track= BKE_tracking_active_track(tracking);
 	MouseSelectUserData userdata;
 
 	mouse_select_init_data(&userdata, co);
@@ -198,12 +200,12 @@ static int mouse_select_curve(bContext *C, float co[2], int extend)
 
 	if(userdata.track) {
 		if(extend) {
-			if(tracking->act_track==userdata.track) {
+			if(act_track==userdata.track) {
 				/* currently only single curve can be selected (selected curve represents active track) */
-				tracking->act_track= NULL;
+				act_track= NULL;
 			}
 		}
-		else if(tracking->act_track!=userdata.track) {
+		else if(act_track!=userdata.track) {
 			MovieTrackingMarker *marker;
 			SelectUserData selectdata = {SEL_DESELECT};
 
@@ -292,9 +294,11 @@ static int delete_curve_exec(bContext *C, wmOperator *UNUSED(op))
 	SpaceClip *sc= CTX_wm_space_clip(C);
 	MovieClip *clip= ED_space_clip(sc);
 	MovieTracking *tracking= &clip->tracking;
+	ListBase *tracksbase= BKE_tracking_get_tracks(tracking);
+	MovieTrackingTrack *act_track= BKE_tracking_active_track(tracking);
 
-	if(tracking->act_track)
-		clip_delete_track(C, clip, tracking->act_track);
+	if(act_track)
+		clip_delete_track(C, clip, tracksbase, act_track);
 
 	return OPERATOR_FINISHED;
 }
@@ -322,16 +326,17 @@ static int delete_knot_exec(bContext *C, wmOperator *UNUSED(op))
 	SpaceClip *sc= CTX_wm_space_clip(C);
 	MovieClip *clip= ED_space_clip(sc);
 	MovieTracking *tracking= &clip->tracking;
+	ListBase *tracksbase= BKE_tracking_get_tracks(tracking);
+	MovieTrackingTrack *act_track= BKE_tracking_active_track(tracking);
 
-	if(tracking->act_track) {
+	if(act_track) {
 		int a= 0;
-		MovieTrackingTrack *track= tracking->act_track;
 
-		while(a<track->markersnr) {
-			MovieTrackingMarker *marker= &track->markers[a];
+		while(a<act_track->markersnr) {
+			MovieTrackingMarker *marker= &act_track->markers[a];
 
 			if(marker->flag&MARKER_GRAPH_SEL)
-				clip_delete_marker(C, clip, track, marker);
+				clip_delete_marker(C, clip, tracksbase, act_track, marker);
 			else
 				a++;
 		}
diff --git a/source/blender/editors/space_clip/clip_intern.h b/source/blender/editors/space_clip/clip_intern.h
index da0b589652e..38da4dd86ff 100644
--- a/source/blender/editors/space_clip/clip_intern.h
+++ b/source/blender/editors/space_clip/clip_intern.h
@@ -92,8 +92,8 @@ void clip_graph_tracking_values_iterate(struct SpaceClip *sc, void *userdata,
 void clip_graph_tracking_iterate(struct SpaceClip *sc, void *userdata,
 			void (*func) (void *userdata, struct MovieTrackingMarker *marker));
 
-void clip_delete_track(struct bContext *C, struct MovieClip *clip, struct MovieTrackingTrack *track);
-void clip_delete_marker(struct bContext *C, struct MovieClip *clip, struct MovieTrackingTrack *track, struct MovieTrackingMarker *marker);
+void clip_delete_track(struct bContext *C, struct MovieClip *clip, struct ListBase *tracksbase, struct MovieTrackingTrack *track);
+void clip_delete_marker(struct bContext *C, struct MovieClip *clip, struct ListBase *tracksbase, struct MovieTrackingTrack *track, struct MovieTrackingMarker *marker);
 
 void clip_view_center_to_point(struct SpaceClip *sc, float x, float y);
 
@@ -139,6 +139,9 @@ void CLIP_OT_stabilize_2d_remove(struct wmOperatorType *ot);
 void CLIP_OT_stabilize_2d_select(struct wmOperatorType *ot);
 void CLIP_OT_stabilize_2d_set_rotation(struct wmOperatorType *ot);
 
-void CLIP_OT_clean_tracks(wmOperatorType *ot);
+void CLIP_OT_clean_tracks(struct wmOperatorType *ot);
+
+void CLIP_OT_tracking_object_new(struct wmOperatorType *ot);
+void CLIP_OT_tracking_object_remove(struct wmOperatorType *ot);
 
 #endif /* ED_CLIP_INTERN_H */
diff --git a/source/blender/editors/space_clip/clip_utils.c b/source/blender/editors/space_clip/clip_utils.c
index 649b278ab3d..3ca8fc35c7f 100644
--- a/source/blender/editors/space_clip/clip_utils.c
+++ b/source/blender/editors/space_clip/clip_utils.c
@@ -119,9 +119,10 @@ void clip_graph_tracking_values_iterate(SpaceClip *sc, void *userdata,
 {
 	MovieClip *clip= ED_space_clip(sc);
 	MovieTracking *tracking= &clip->tracking;
+	ListBase *tracksbase= BKE_tracking_get_tracks(tracking);
 	MovieTrackingTrack *track;
 
-	track= tracking->tracks.first;
+	track= tracksbase->first;
 	while(track) {
 		if(TRACK_VIEW_SELECTED(sc, track)) {
 			clip_graph_tracking_values_iterate_track(sc, track, userdata, func, segment_start, segment_end);
@@ -136,9 +137,10 @@ void clip_graph_tracking_iterate(SpaceClip *sc, void *userdata,
 {
 	MovieClip *clip= ED_space_clip(sc);
 	MovieTracking *tracking= &clip->tracking;
+	ListBase *tracksbase= BKE_tracking_get_tracks(tracking);
 	MovieTrackingTrack *track;
 
-	track= tracking->tracks.first;
+	track= tracksbase->first;
 	while(track) {
 		if(TRACK_VIEW_SELECTED(sc, track)) {
 			int i;
@@ -158,14 +160,15 @@ void clip_graph_tracking_iterate(SpaceClip *sc, void *userdata,
 	}
 }
 
-void clip_delete_track(bContext *C, MovieClip *clip, MovieTrackingTrack *track)
+void clip_delete_track(bContext *C, MovieClip *clip, ListBase *tracksbase, MovieTrackingTrack *track)
 {
 	MovieTracking *tracking= &clip->tracking;
 	MovieTrackingStabilization *stab= &tracking->stabilization;
+	MovieTrackingTrack *act_track= BKE_tracking_active_track(tracking);
 
 	int has_bundle= 0, update_stab= 0;
 
-	if(track==tracking->act_track)
+	if(track==act_track)
 		tracking->act_track= NULL;
 
 	if(track==stab->rot_track) {
@@ -179,7 +182,7 @@ void clip_delete_track(bContext *C, MovieClip *clip, MovieTrackingTrack *track)
 		has_bundle= 1;
 
 	BKE_tracking_free_track(track);
-	BLI_freelinkN(&tracking->tracks, track);
+	BLI_freelinkN(tracksbase, track);
 
 	WM_event_add_notifier(C, NC_MOVIECLIP|NA_EDITED, clip);
 
@@ -194,10 +197,10 @@ void clip_delete_track(bContext *C, MovieClip *clip, MovieTrackingTrack *track)
 		WM_event_add_notifier(C, NC_SPACE|ND_SPACE_VIEW3D, NULL);
 }
 
-void clip_delete_marker(bContext *C, MovieClip *clip, MovieTrackingTrack *track, MovieTrackingMarker *marker)
+void clip_delete_marker(bContext *C, MovieClip *clip, ListBase *tracksbase, MovieTrackingTrack *track, MovieTrackingMarker *marker)
 {
 	if(track->markersnr==1) {
-		clip_delete_track(C, clip, track);
+		clip_delete_track(C, clip, tracksbase, track);
 	}
 	else {
 		BKE_tracking_delete_marker(track, marker->framenr);
diff --git a/source/blender/editors/space_clip/space_clip.c b/source/blender/editors/space_clip/space_clip.c
index c8577f7760e..01779a806b9 100644
--- a/source/blender/editors/space_clip/space_clip.c
+++ b/source/blender/editors/space_clip/space_clip.c
@@ -372,6 +372,10 @@ static void clip_operatortypes(void)
 	WM_operatortype_append(CLIP_OT_graph_select);
 	WM_operatortype_append(CLIP_OT_graph_delete_curve);
 	WM_operatortype_append(CLIP_OT_graph_delete_knot);
+
+	/* object tracking */
+	WM_operatortype_append(CLIP_OT_tracking_object_new);
+	WM_operatortype_append(CLIP_OT_tracking_object_remove);
 }
 
 static void clip_keymap(struct wmKeyConfig *keyconf)
diff --git a/source/blender/editors/space_clip/tracking_ops.c b/source/blender/editors/space_clip/tracking_ops.c
index 3d004ab73da..65505fea89e 100644
--- a/source/blender/editors/space_clip/tracking_ops.c
+++ b/source/blender/editors/space_clip/tracking_ops.c
@@ -117,14 +117,16 @@ static int space_clip_camera_poll(bContext *C)
 static void add_marker(SpaceClip *sc, float x, float y)
 {
 	MovieClip *clip= ED_space_clip(sc);
+	MovieTracking *tracking= &clip->tracking;
+	ListBase *tracksbase= BKE_tracking_get_tracks(tracking);
 	MovieTrackingTrack *track;
 	int width, height;
 	
 	ED_space_clip_size(sc, &width, &height);
 
-	track= BKE_tracking_add_track(&clip->tracking, x, y, sc->user.framenr, width, height);
+	track= BKE_tracking_add_track(tracking, tracksbase, x, y, sc->user.framenr, width, height);
 
-	BKE_tracking_select_track(&clip->tracking, track, TRACK_AREA_ALL, 0);
+	BKE_tracking_select_track(tracksbase, track, TRACK_AREA_ALL, 0);
 
 	clip->tracking.act_track= track;
 }
@@ -191,13 +193,14 @@ static int delete_track_exec(bContext *C, wmOperator *UNUSED(op))
 	SpaceClip *sc= CTX_wm_space_clip(C);
 	MovieClip *clip= ED_space_clip(sc);
 	MovieTracking *tracking= &clip->tracking;
-	MovieTrackingTrack *track= tracking->tracks.first, *next;
+	ListBase *tracksbase= BKE_tracking_get_tracks(tracking);
+	MovieTrackingTrack *track= tracksbase->first, *next;
 
 	while(track) {
 		next= track->next;
 
 		if(TRACK_VIEW_SELECTED(sc, track))
-			clip_delete_track(C, clip, track);
+			clip_delete_track(C, clip, tracksbase, track);
 
 		track= next;
 	}
@@ -230,7 +233,8 @@ static int delete_marker_exec(bContext *C, wmOperator *UNUSED(op))
 {
 	SpaceClip *sc= CTX_wm_space_clip(C);
 	MovieClip *clip= ED_space_clip(sc);
-	MovieTrackingTrack *track= clip->tracking.tracks.first, *next;
+	ListBase *tracksbase= BKE_tracking_get_tracks(&clip->tracking);
+	MovieTrackingTrack *track= tracksbase->first, *next;
 	int framenr= sc->user.framenr;
 	int has_selection= 0;
 
@@ -243,7 +247,7 @@ static int delete_marker_exec(bContext *C, wmOperator *UNUSED(op))
 			if(marker) {
 				has_selection|= track->markersnr>1;
 
-				clip_delete_marker(C, clip, track, marker);
+				clip_delete_marker(C, clip, tracksbase, track, marker);
 			}
 		}
 
@@ -429,6 +433,7 @@ static void *slide_marker_customdata(bContext *C, wmEvent *event)
 	int width, height;
 	float co[2];
 	void *customdata= NULL;
+	ListBase *tracksbase= BKE_tracking_get_tracks(&clip->tracking);
 
 	ED_space_clip_size(sc, &width, &height);
 
@@ -437,7 +442,7 @@ static void *slide_marker_customdata(bContext *C, wmEvent *event)
 
 	ED_clip_mouse_pos(C, event, co);
 
-	track= clip->tracking.tracks.first;
+	track= tracksbase->first;
 	while(track) {
 		if(TRACK_VIEW_SELECTED(sc, track) && (track->flag&TRACK_LOCKED)==0) {
 			MovieTrackingMarker *marker= BKE_tracking_get_marker(track, sc->user.framenr);
@@ -721,12 +726,12 @@ static float dist_to_rect(float co[2], float pos[2], float min[2], float max[2])
 	return MIN4(d1, d2, d3, d4);
 }
 
-static MovieTrackingTrack *find_nearest_track(SpaceClip *sc, MovieClip *clip, float co[2])
+static MovieTrackingTrack *find_nearest_track(SpaceClip *sc, ListBase *tracksbase, float co[2])
 {
 	MovieTrackingTrack *track= NULL, *cur;
 	float mindist= 0.0f;
 
-	cur= clip->tracking.tracks.first;
+	cur= tracksbase->first;
 	while(cur) {
 		MovieTrackingMarker *marker= BKE_tracking_get_marker(cur, sc->user.framenr);
 
@@ -764,10 +769,11 @@ static int mouse_select(bContext *C, float co[2], int extend)
 	SpaceClip *sc= CTX_wm_space_clip(C);
 	MovieClip *clip= ED_space_clip(sc);
 	MovieTracking *tracking= &clip->tracking;
-	MovieTrackingTrack *act_track= tracking->act_track;
+	ListBase *tracksbase= BKE_tracking_get_tracks(tracking);
+	MovieTrackingTrack *act_track= BKE_tracking_active_track(tracking);
 	MovieTrackingTrack *track= NULL;	/* selected marker */
 
-	track= find_nearest_track(sc, clip, co);
+	track= find_nearest_track(sc, tracksbase, co);
 
 	if(track) {
 		int area= track_mouse_area(sc, co, track);
@@ -784,7 +790,7 @@ static int mouse_select(bContext *C, float co[2], int extend)
 			if(area==TRACK_AREA_POINT)
 				area= TRACK_AREA_ALL;
 
-			BKE_tracking_select_track(tracking, track, area, extend);
+			BKE_tracking_select_track(tracksbase, track, area, extend);
 			clip->tracking.act_track= track;
 		}
 	}
@@ -867,6 +873,7 @@ static int border_select_exec(bContext *C, wmOperator *op)
 	SpaceClip *sc= CTX_wm_space_clip(C);
 	MovieClip *clip= ED_space_clip(sc);
 	MovieTrackingTrack *track;
+	ListBase *tracksbase= BKE_tracking_get_tracks(&clip->tracking);
 	rcti rect;
 	rctf rectf;
 	int change= 0, mode, extend;
@@ -884,7 +891,7 @@ static int border_select_exec(bContext *C, wmOperator *op)
 	extend= RNA_boolean_get(op->ptr, "extend");
 
 	/* do actual selection */
-	track= clip->tracking.tracks.first;
+	track= tracksbase->first;
 	while(track) {
 		if((track->flag&TRACK_HIDDEN)==0) {
 			MovieTrackingMarker *marker= BKE_tracking_get_marker(track, sc->user.framenr);
@@ -952,6 +959,7 @@ static int circle_select_exec(bContext *C, wmOperator *op)
 	MovieClip *clip= ED_space_clip(sc);
 	ARegion *ar= CTX_wm_region(C);
 	MovieTrackingTrack *track;
+	ListBase *tracksbase= BKE_tracking_get_tracks(&clip->tracking);
 	int x, y, radius, width, height, mode, change= 0;
 	float zoomx, zoomy, offset[2], ellipse[2];
 
@@ -972,7 +980,7 @@ static int circle_select_exec(bContext *C, wmOperator *op)
 	ED_clip_point_stable_pos(C, x, y, &offset[0], &offset[1]);
 
 	/* do selection */
-	track= clip->tracking.tracks.first;
+	track= tracksbase->first;
 	while(track) {
 		if((track->flag&TRACK_HIDDEN)==0) {
 			MovieTrackingMarker *marker= BKE_tracking_get_marker(track, sc->user.framenr);
@@ -1026,13 +1034,14 @@ static int select_all_exec(bContext *C, wmOperator *op)
 	SpaceClip *sc= CTX_wm_space_clip(C);
 	MovieClip *clip= ED_space_clip(sc);
 	MovieTrackingTrack *track= NULL;	/* selected track */
+	ListBase *tracksbase= BKE_tracking_get_tracks(&clip->tracking);
 	int action= RNA_enum_get(op->ptr, "action");
 	int framenr= sc->user.framenr;
 	int has_selection= 0;
 
 	if(action == SEL_TOGGLE){
 		action= SEL_SELECT;
-		track= clip->tracking.tracks.first;
+		track= tracksbase->first;
 		while(track) {
 			if(TRACK_VIEW_SELECTED(sc, track)) {
 				action= SEL_DESELECT;
@@ -1043,7 +1052,7 @@ static int select_all_exec(bContext *C, wmOperator *op)
 		}
 	}
 
-	track= clip->tracking.tracks.first;
+	track= tracksbase->first;
 	while(track) {
 		if((track->flag&TRACK_HIDDEN)==0) {
 			MovieTrackingMarker *marker= BKE_tracking_get_marker(track, framenr);
@@ -1108,9 +1117,11 @@ static int select_groped_exec(bContext *C, wmOperator *op)
 	MovieClip *clip= ED_space_clip(sc);
 	MovieTrackingTrack *track;
 	MovieTrackingMarker *marker;
+	MovieTracking *tracking= &clip->tracking;
+	ListBase *tracksbase= BKE_tracking_get_tracks(tracking);
 	int group= RNA_enum_get(op->ptr, "group");
 
-	track= clip->tracking.tracks.first;
+	track= tracksbase->first;
 	while(track) {
 		int ok= 0;
 
@@ -1132,11 +1143,13 @@ static int select_groped_exec(bContext *C, wmOperator *op)
 			ok= marker->flag&MARKER_DISABLED;
 		}
 		else if(group==5) { /* color */
-			if(clip->tracking.act_track) {
-				ok= (track->flag&TRACK_CUSTOMCOLOR) == (clip->tracking.act_track->flag&TRACK_CUSTOMCOLOR);
+			MovieTrackingTrack *act_track= BKE_tracking_active_track(tracking);
+
+			if(act_track) {
+				ok= (track->flag&TRACK_CUSTOMCOLOR) == (act_track->flag&TRACK_CUSTOMCOLOR);
 
 				if(ok && track->flag&TRACK_CUSTOMCOLOR)
-					ok= equals_v3v3(track->color, clip->tracking.act_track->color);
+					ok= equals_v3v3(track->color, act_track->color);
 			}
 		}
 		else if(group==6) { /* failed */
@@ -1208,10 +1221,11 @@ static int track_markers_testbreak(void)
 static int track_count_markers(SpaceClip *sc, MovieClip *clip)
 {
 	int tot= 0;
+	ListBase *tracksbase= BKE_tracking_get_tracks(&clip->tracking);
 	MovieTrackingTrack *track;
 	int framenr= sc->user.framenr;
 
-	track= clip->tracking.tracks.first;
+	track= tracksbase->first;
 	while(track) {
 		if(TRACK_VIEW_SELECTED(sc, track) && (track->flag&TRACK_LOCKED)==0) {
 			MovieTrackingMarker *marker= BKE_tracking_exact_marker(track, framenr);
@@ -1228,6 +1242,7 @@ static int track_count_markers(SpaceClip *sc, MovieClip *clip)
 
 static void track_init_markers(SpaceClip *sc, MovieClip *clip, int *frames_limit_r)
 {
+	ListBase *tracksbase= BKE_tracking_get_tracks(&clip->tracking);
 	MovieTrackingTrack *track;
 	int framenr= sc->user.framenr, hidden= 0;
 	int frames_limit= 0;
@@ -1235,7 +1250,7 @@ static void track_init_markers(SpaceClip *sc, MovieClip *clip, int *frames_limit
 	if((sc->flag&SC_SHOW_MARKER_PATTERN)==0) hidden|= TRACK_AREA_PAT;
 	if((sc->flag&SC_SHOW_MARKER_SEARCH)==0) hidden|= TRACK_AREA_SEARCH;
 
-	track= clip->tracking.tracks.first;
+	track= tracksbase->first;
 	while(track) {
 		if(hidden)
 			BKE_tracking_track_flag(track, hidden, SELECT, 1);
@@ -1448,6 +1463,11 @@ static int track_markers_invoke(bContext *C, wmOperator *op, wmEvent *UNUSED(eve
 	int backwards= RNA_boolean_get(op->ptr, "backwards");
 	int sequence= RNA_boolean_get(op->ptr, "sequence");
 
+	if(WM_jobs_test(CTX_wm_manager(C), CTX_wm_area(C))) {
+		/* only one tracking is allowed at a time */
+		return OPERATOR_CANCELLED;
+	}
+
 	if(clip->tracking_context)
 		return OPERATOR_CANCELLED;
 
@@ -1546,9 +1566,10 @@ static int solve_camera_initjob(bContext *C, SolveCameraJob *scj, wmOperator *op
 	Scene *scene= CTX_data_scene(C);
 	MovieTracking *tracking= &clip->tracking;
 	MovieTrackingSettings *settings= &clip->tracking.settings;
+	MovieTrackingObject *object= BKE_tracking_active_object(tracking);
 	int width, height;
 
-	if(!BKE_tracking_can_reconstruct(tracking, error_msg, max_error))
+	if(!BKE_tracking_can_reconstruct(tracking, object, error_msg, max_error))
 		return 0;
 
 	/* could fail if footage uses images with different sizes */
@@ -1559,7 +1580,7 @@ static int solve_camera_initjob(bContext *C, SolveCameraJob *scj, wmOperator *op
 	scj->reports= op->reports;
 	scj->user= sc->user;
 
-	scj->context= BKE_tracking_reconstruction_context_new(tracking,
+	scj->context= BKE_tracking_reconstruction_context_new(tracking, object,
 			settings->keyframe1, settings->keyframe2, width, height);
 
 	tracking->stats= MEM_callocN(sizeof(MovieTrackingStats), "solve camera stats");
@@ -1670,9 +1691,15 @@ static int solve_camera_invoke(bContext *C, wmOperator *op, wmEvent *UNUSED(even
 	SpaceClip *sc= CTX_wm_space_clip(C);
 	MovieClip *clip= ED_space_clip(sc);
 	MovieTracking *tracking= &clip->tracking;
+	MovieTrackingReconstruction *reconstruction= BKE_tracking_get_reconstruction(tracking);
 	wmJob *steve;
 	char error_msg[256]= "\0";
 
+	if(WM_jobs_test(CTX_wm_manager(C), CTX_wm_area(C))) {
+		/* only one solve is allowed at a time */
+		return OPERATOR_CANCELLED;
+	}
+
 	scj= MEM_callocN(sizeof(SolveCameraJob), "SolveCameraJob data");
 	if(!solve_camera_initjob(C, scj, op, error_msg, sizeof(error_msg))) {
 		if(error_msg[0])
@@ -1686,7 +1713,7 @@ static int solve_camera_invoke(bContext *C, wmOperator *op, wmEvent *UNUSED(even
 	BLI_strncpy(tracking->stats->message, "Solving camera | Preparing solve", sizeof(tracking->stats->message));
 
 	/* hide reconstruction statistics from previous solve */
-	clip->tracking.reconstruction.flag&= ~TRACKING_RECONSTRUCTED;
+	reconstruction->flag&= ~TRACKING_RECONSTRUCTED;
 	WM_event_add_notifier(C, NC_MOVIECLIP|NA_EVALUATED, clip);
 
 	/* setup job */
@@ -1746,7 +1773,9 @@ static int clear_solution_exec(bContext *C, wmOperator *UNUSED(op))
 	SpaceClip *sc= CTX_wm_space_clip(C);
 	MovieClip *clip= ED_space_clip(sc);
 	MovieTracking *tracking= &clip->tracking;
-	MovieTrackingTrack *track= tracking->tracks.first;
+	ListBase *tracksbase= BKE_tracking_get_tracks(&clip->tracking);
+	MovieTrackingReconstruction *reconstruction= BKE_tracking_get_reconstruction(tracking);
+	MovieTrackingTrack *track= tracksbase->first;
 
 	while(track) {
 		track->flag&= ~TRACK_HAS_BUNDLE;
@@ -1754,13 +1783,13 @@ static int clear_solution_exec(bContext *C, wmOperator *UNUSED(op))
 		track= track->next;
 	}
 
-	if(tracking->reconstruction.cameras)
-		MEM_freeN(tracking->reconstruction.cameras);
+	if(reconstruction->cameras)
+		MEM_freeN(reconstruction->cameras);
 
-	tracking->reconstruction.cameras= NULL;
-	tracking->reconstruction.camnr= 0;
+	reconstruction->cameras= NULL;
+	reconstruction->camnr= 0;
 
-	tracking->reconstruction.flag&= ~TRACKING_RECONSTRUCTED;
+	reconstruction->flag&= ~TRACKING_RECONSTRUCTED;
 
 	DAG_id_tag_update(&clip->id, 0);
 
@@ -1792,9 +1821,10 @@ static int clear_track_path_exec(bContext *C, wmOperator *op)
 	SpaceClip *sc= CTX_wm_space_clip(C);
 	MovieClip *clip= ED_space_clip(sc);
 	MovieTrackingTrack *track;
+	ListBase *tracksbase= BKE_tracking_get_tracks(&clip->tracking);
 	int action= RNA_enum_get(op->ptr, "action");
 
-	track= clip->tracking.tracks.first;
+	track= tracksbase->first;
 	while(track) {
 		if(TRACK_VIEW_SELECTED(sc, track))
 			BKE_tracking_clear_path(track, sc->user.framenr, action);
@@ -1839,7 +1869,8 @@ static int disable_markers_exec(bContext *C, wmOperator *op)
 	SpaceClip *sc= CTX_wm_space_clip(C);
 	MovieClip *clip= ED_space_clip(sc);
 	MovieTracking *tracking= &clip->tracking;
-	MovieTrackingTrack *track= tracking->tracks.first;
+	ListBase *tracksbase= BKE_tracking_get_tracks(tracking);
+	MovieTrackingTrack *track= tracksbase->first;
 	int action= RNA_enum_get(op->ptr, "action");
 
 	while(track) {
@@ -1892,10 +1923,11 @@ static int count_selected_bundles(bContext *C)
 {
 	SpaceClip *sc= CTX_wm_space_clip(C);
 	MovieClip *clip= ED_space_clip(sc);
+	ListBase *tracksbase= BKE_tracking_get_tracks(&clip->tracking);
 	MovieTrackingTrack *track;
 	int tot= 0;
 
-	track= clip->tracking.tracks.first;
+	track= tracksbase->first;
 	while(track) {
 		if(TRACK_VIEW_SELECTED(sc, track) && (track->flag&TRACK_HAS_BUNDLE))
 			tot++;
@@ -1910,20 +1942,33 @@ static int set_origin_exec(bContext *C, wmOperator *op)
 {
 	SpaceClip *sc= CTX_wm_space_clip(C);
 	MovieClip *clip= ED_space_clip(sc);
+	MovieTracking *tracking= &clip->tracking;
 	MovieTrackingTrack *track;
+	MovieTrackingObject *tracking_object;
 	Scene *scene= CTX_data_scene(C);
-	Object *parent= scene->camera;
+	Object *object;
+	ListBase *tracksbase;
 	float mat[4][4], vec[3];
 
 	if(count_selected_bundles(C)!=1) {
 		BKE_report(op->reports, RPT_ERROR, "Track with bundle should be selected to define origin position");
+
 		return OPERATOR_CANCELLED;
 	}
 
-	if(scene->camera->parent)
-		parent= scene->camera->parent;
+	tracking_object= BKE_tracking_active_object(tracking);
+
+	if(tracking_object->flag&TRACKING_OBJECT_CAMERA)
+		object= scene->camera;
+	else
+		object= OBACT;
+
+	if(object->parent)
+		object= object->parent;
 
-	track= clip->tracking.tracks.first;
+	tracksbase= BKE_tracking_object_tracks(tracking, tracking_object);
+
+	track= tracksbase->first;
 	while(track) {
 		if(TRACK_VIEW_SELECTED(sc, track))
 			break;
@@ -1932,12 +1977,16 @@ static int set_origin_exec(bContext *C, wmOperator *op)
 	}
 
 	BKE_get_tracking_mat(scene, NULL, mat);
+
 	mul_v3_m4v3(vec, mat, track->bundle_pos);
 
-	sub_v3_v3(parent->loc, vec);
+	if(tracking_object->flag&TRACKING_OBJECT_CAMERA)
+		sub_v3_v3(object->loc, vec);
+	else
+		copy_v3_v3(object->loc, vec);
 
 	DAG_id_tag_update(&clip->id, 0);
-	DAG_id_tag_update(&parent->id, OB_RECALC_OB);
+	DAG_id_tag_update(&object->id, OB_RECALC_OB);
 
 	WM_event_add_notifier(C, NC_MOVIECLIP|NA_EVALUATED, clip);
 	WM_event_add_notifier(C, NC_OBJECT|ND_TRANSFORM, NULL);
@@ -1962,12 +2011,27 @@ void CLIP_OT_set_origin(wmOperatorType *ot)
 
 /********************** set floor operator *********************/
 
-static void set_axis(Scene *scene,  Object *ob, MovieTrackingTrack *track, char axis)
+static void set_axis(Scene *scene,  Object *ob, MovieTrackingObject *tracking_object,
+			MovieTrackingTrack *track, char axis)
 {
-	float mat[4][4], vec[3], obmat[4][4];
+	int is_camera= tracking_object->flag&TRACKING_OBJECT_CAMERA;
+	int  flip= 0;
+	float mat[4][4], vec[3], obmat[4][4], dvec[3];
+
+	object_to_mat4(ob, obmat);
 
 	BKE_get_tracking_mat(scene, NULL, mat);
 	mul_v3_m4v3(vec, mat, track->bundle_pos);
+	copy_v3_v3(dvec, vec);
+
+	if(!is_camera) {
+		float imat[4][4];
+
+		invert_m4_m4(imat, obmat);
+		mul_v3_m4v3(dvec, imat, vec);
+
+		sub_v3_v3(vec, obmat[3]);
+	}
 
 	if(len_v2(vec) < 1e-3f)
 		return;
@@ -1975,26 +2039,48 @@ static void set_axis(Scene *scene,  Object *ob, MovieTrackingTrack *track, char
 	unit_m4(mat);
 
 	if(axis=='X') {
-		if(fabsf(vec[1])<1e-3f) {
+		if(fabsf(dvec[1])<1e-3f) {
+			flip= 1;
+
 			mat[0][0]= -1.0f; mat[0][1]= 0.0f; mat[0][2]= 0.0f;
 			mat[1][0]= 0.0f; mat[1][1]= -1.0f; mat[1][2]= 0.0f;
 			mat[2][0]= 0.0f; mat[2][1]= 0.0f; mat[2][2]= 1.0f;
 		} else {
 			copy_v3_v3(mat[0], vec);
-			mat[0][2]= 0.0f;
-			mat[2][0]= 0.0f; mat[2][1]= 0.0f; mat[2][2]= 1.0f;
-			cross_v3_v3v3(mat[1], mat[2], mat[0]);
+
+			if(is_camera || fabsf(vec[2])<1e-3f) {
+				mat[0][2]= 0.0f;
+				mat[2][0]= 0.0f; mat[2][1]= 0.0f; mat[2][2]= 1.0f;
+				cross_v3_v3v3(mat[1], mat[2], mat[0]);
+			}
+			else {
+				vec[2]= 0.0f;
+
+				cross_v3_v3v3(mat[1], mat[0], vec);
+				cross_v3_v3v3(mat[2], mat[0], mat[1]);
+			}
 		}
 	} else {
-		if(fabsf(vec[0])<1e-3f) {
+		if(fabsf(dvec[0])<1e-3f) {
+			flip= 1;
+
 			mat[0][0]= -1.0f; mat[0][1]= 0.0f; mat[0][2]= 0.0f;
 			mat[1][0]= 0.0f; mat[1][1]= -1.0f; mat[1][2]= 0.0f;
 			mat[2][0]= 0.0f; mat[2][1]= 0.0f; mat[2][2]= 1.0f;
 		} else {
 			copy_v3_v3(mat[1], vec);
-			mat[1][2]= 0.0f;
-			mat[2][0]= 0.0f; mat[2][1]= 0.0f; mat[2][2]= 1.0f;
-			cross_v3_v3v3(mat[0], mat[1], mat[2]);
+
+			if(is_camera || fabsf(vec[2])<1e-3f) {
+				mat[1][2]= 0.0f;
+				mat[2][0]= 0.0f; mat[2][1]= 0.0f; mat[2][2]= 1.0f;
+				cross_v3_v3v3(mat[0], mat[1], mat[2]);
+			}
+			else {
+				vec[2]= 0.0f;
+
+				cross_v3_v3v3(mat[0], vec, mat[1]);
+				cross_v3_v3v3(mat[2], mat[0], mat[1]);
+			}
 		}
 	}
 
@@ -2002,10 +2088,25 @@ static void set_axis(Scene *scene,  Object *ob, MovieTrackingTrack *track, char
 	normalize_v3(mat[1]);
 	normalize_v3(mat[2]);
 
-	invert_m4(mat);
+	if(is_camera) {
+		invert_m4(mat);
+
+		mul_m4_m4m4(mat, obmat, mat);
+	}
+	else {
+		if(!flip) {
+			float rmat[3][3], tmat[4][4];
+
+			object_rot_to_mat3(ob, rmat);
+			copy_m4_m3(tmat, rmat);
+			invert_m4(tmat);
+
+			mul_m4_m4m4(mat, mat, tmat);
+		}
+
+		mul_m4_m4m4(mat, mat, obmat);
+	}
 
-	object_to_mat4(ob, obmat);
-	mul_m4_m4m4(mat, obmat, mat);
 	object_apply_mat4(ob, mat, 0, 0);
 }
 
@@ -2014,9 +2115,11 @@ static int set_floor_exec(bContext *C, wmOperator *op)
 	SpaceClip *sc= CTX_wm_space_clip(C);
 	MovieClip *clip= ED_space_clip(sc);
 	Scene *scene= CTX_data_scene(C);
-	MovieTrackingTrack *track, *axis_track= NULL;
-	Object *camera= scene->camera;
-	Object *parent= camera;
+	MovieTracking *tracking= &clip->tracking;
+	MovieTrackingObject *tracking_object;
+	MovieTrackingTrack *track, *axis_track= NULL, *act_track;
+	ListBase *tracksbase;
+	Object *object;
 	int tot= 0;
 	float vec[3][3], mat[4][4], obmat[4][4], newmat[4][4], orig[3]= {0.0f, 0.0f, 0.0f};
 	float rot[4][4]={{0.0f, 0.0f, -1.0f, 0.0f},
@@ -2026,21 +2129,31 @@ static int set_floor_exec(bContext *C, wmOperator *op)
 
 	if(count_selected_bundles(C)!=3) {
 		BKE_report(op->reports, RPT_ERROR, "Three tracks with bundles are needed to orient the floor");
+
 		return OPERATOR_CANCELLED;
 	}
 
-	if(scene->camera->parent)
-		parent= scene->camera->parent;
+	tracking_object= BKE_tracking_active_object(tracking);
+	tracksbase= BKE_tracking_object_tracks(tracking, tracking_object);
+	act_track= BKE_tracking_active_track(tracking);
+
+	if(tracking_object->flag&TRACKING_OBJECT_CAMERA)
+		object= scene->camera;
+	else
+		object= OBACT;
+
+	if(object->parent)
+		object= object->parent;
 
 	BKE_get_tracking_mat(scene, NULL, mat);
 
 	/* get 3 bundles to use as reference */
-	track= clip->tracking.tracks.first;
+	track= tracksbase->first;
 	while(track && tot<3) {
 		if(track->flag&TRACK_HAS_BUNDLE && TRACK_VIEW_SELECTED(sc, track)) {
 			mul_v3_m4v3(vec[tot], mat, track->bundle_pos);
 
-			if(tot==0 || track==clip->tracking.act_track)
+			if(tot==0 || track==act_track)
 				copy_v3_v3(orig, vec[tot]);
 			else
 				axis_track= track;
@@ -2070,25 +2183,30 @@ static int set_floor_exec(bContext *C, wmOperator *op)
 	mat[3][1]= orig[1];
 	mat[3][2]= orig[2];
 
-	invert_m4(mat);
-
-	object_to_mat4(parent, obmat);
-	mul_m4_m4m4(mat, obmat, mat);
-	mul_m4_m4m4(newmat, mat, rot);
-	object_apply_mat4(parent, newmat, 0, 0);
+	if(tracking_object->flag&TRACKING_OBJECT_CAMERA) {
+		invert_m4(mat);
 
-	/* make camera have positive z-coordinate */
-	if(parent->loc[2]<0) {
-		invert_m4(rot);
+		object_to_mat4(object, obmat);
+		mul_m4_m4m4(mat, obmat, mat);
 		mul_m4_m4m4(newmat, mat, rot);
-		object_apply_mat4(parent, newmat, 0, 0);
+		object_apply_mat4(object, newmat, 0, 0);
+
+		/* make camera have positive z-coordinate */
+		if(object->loc[2]<0) {
+		  invert_m4(rot);
+		  mul_m4_m4m4(newmat, mat, rot);
+		  object_apply_mat4(object, newmat, 0, 0);
+		}
+	}
+	else {
+		object_apply_mat4(object, mat, 0, 0);
 	}
 
-	where_is_object(scene, parent);
-	set_axis(scene, parent, axis_track, 'X');
+	where_is_object(scene, object);
+	set_axis(scene, object, tracking_object, axis_track, 'X');
 
 	DAG_id_tag_update(&clip->id, 0);
-	DAG_id_tag_update(&parent->id, OB_RECALC_OB);
+	DAG_id_tag_update(&object->id, OB_RECALC_OB);
 
 	WM_event_add_notifier(C, NC_MOVIECLIP|NA_EVALUATED, clip);
 	WM_event_add_notifier(C, NC_OBJECT|ND_TRANSFORM, NULL);
@@ -2117,9 +2235,12 @@ static int set_axis_exec(bContext *C, wmOperator *op)
 {
 	SpaceClip *sc= CTX_wm_space_clip(C);
 	MovieClip *clip= ED_space_clip(sc);
+	MovieTracking *tracking= &clip->tracking;
+	MovieTrackingObject *tracking_object= BKE_tracking_active_object(tracking);
 	MovieTrackingTrack *track;
 	Scene *scene= CTX_data_scene(C);
-	Object *parent= scene->camera;
+	Object *object;
+	ListBase *tracksbase;
 	int axis= RNA_enum_get(op->ptr, "axis");
 
 	if(count_selected_bundles(C)!=1) {
@@ -2128,10 +2249,17 @@ static int set_axis_exec(bContext *C, wmOperator *op)
 		return OPERATOR_CANCELLED;
 	}
 
-	if(scene->camera->parent)
-		parent= scene->camera->parent;
+	if(tracking_object->flag & TRACKING_OBJECT_CAMERA)
+		object= scene->camera;
+	else
+		object= OBACT;
 
-	track= clip->tracking.tracks.first;
+	if(object->parent)
+		object= object->parent;
+
+	tracksbase= BKE_tracking_object_tracks(tracking, tracking_object);
+
+	track=tracksbase->first;
 	while(track) {
 		if(TRACK_VIEW_SELECTED(sc, track))
 			break;
@@ -2139,10 +2267,10 @@ static int set_axis_exec(bContext *C, wmOperator *op)
 		track= track->next;
 	}
 
-	set_axis(scene, parent, track, axis==0?'X':'Y');
+	set_axis(scene, object, tracking_object, track, axis==0?'X':'Y');
 
 	DAG_id_tag_update(&clip->id, 0);
-	DAG_id_tag_update(&parent->id, OB_RECALC_OB);
+	DAG_id_tag_update(&object->id, OB_RECALC_OB);
 
 	WM_event_add_notifier(C, NC_MOVIECLIP|NA_EVALUATED, clip);
 	WM_event_add_notifier(C, NC_OBJECT|ND_TRANSFORM, NULL);
@@ -2183,6 +2311,7 @@ static int set_scale_exec(bContext *C, wmOperator *op)
 	MovieTrackingTrack *track;
 	Scene *scene= CTX_data_scene(C);
 	Object *parent= scene->camera;
+	ListBase *tracksbase= BKE_tracking_get_tracks(&clip->tracking);
 	int tot= 0;
 	float vec[2][3], mat[4][4], scale;
 	float dist= RNA_float_get(op->ptr, "distance");
@@ -2198,7 +2327,7 @@ static int set_scale_exec(bContext *C, wmOperator *op)
 
 	BKE_get_tracking_mat(scene, NULL, mat);
 
-	track= clip->tracking.tracks.first;
+	track= tracksbase->first;
 	while(track) {
 		if(TRACK_VIEW_SELECTED(sc, track)) {
 			mul_v3_m4v3(vec[tot], mat, track->bundle_pos);
@@ -2301,11 +2430,14 @@ static int hide_tracks_exec(bContext *C, wmOperator *op)
 	SpaceClip *sc= CTX_wm_space_clip(C);
 	MovieClip *clip= ED_space_clip(sc);
 	MovieTrackingTrack *track;
+	MovieTracking *tracking= &clip->tracking;
+	ListBase *tracksbase= BKE_tracking_get_tracks(tracking);
+	MovieTrackingTrack *act_track= BKE_tracking_active_track(tracking);
 	int unselected;
 
 	unselected= RNA_boolean_get(op->ptr, "unselected");
 
-	track= clip->tracking.tracks.first;
+	track= tracksbase->first;
 	while(track) {
 		if(unselected==0 && TRACK_VIEW_SELECTED(sc, track)) {
 			track->flag|= TRACK_HIDDEN;
@@ -2316,7 +2448,7 @@ static int hide_tracks_exec(bContext *C, wmOperator *op)
 		track= track->next;
 	}
 
-	if(clip->tracking.act_track && clip->tracking.act_track->flag&TRACK_HIDDEN)
+	if(act_track && act_track->flag&TRACK_HIDDEN)
 		clip->tracking.act_track= NULL;
 
 	if(unselected==0) {
@@ -2353,9 +2485,10 @@ static int hide_tracks_clear_exec(bContext *C, wmOperator *UNUSED(op))
 {
 	SpaceClip *sc= CTX_wm_space_clip(C);
 	MovieClip *clip= ED_space_clip(sc);
+	ListBase *tracksbase= BKE_tracking_get_tracks(&clip->tracking);
 	MovieTrackingTrack *track;
 
-	track= clip->tracking.tracks.first;
+	track= tracksbase->first;
 	while(track) {
 		track->flag&= ~TRACK_HIDDEN;
 
@@ -2407,7 +2540,9 @@ static int detect_features_exec(bContext *C, wmOperator *op)
 	SpaceClip *sc= CTX_wm_space_clip(C);
 	MovieClip *clip= ED_space_clip(sc);
 	ImBuf *ibuf= BKE_movieclip_get_ibuf_flag(clip, &sc->user, 0);
-	MovieTrackingTrack *track= clip->tracking.tracks.first;
+	MovieTracking *tracking= &clip->tracking;
+	ListBase *tracksbase= BKE_tracking_get_tracks(tracking);
+	MovieTrackingTrack *track= tracksbase->first;
 	int placement= RNA_enum_get(op->ptr, "placement");
 	int margin= RNA_int_get(op->ptr, "margin");
 	int min_trackability= RNA_int_get(op->ptr, "min_trackability");
@@ -2429,7 +2564,8 @@ static int detect_features_exec(bContext *C, wmOperator *op)
 		track= track->next;
 	}
 
-	BKE_tracking_detect_fast(&clip->tracking, ibuf, sc->user.framenr, margin, min_trackability, min_distance, layer, place_outside_layer);
+	BKE_tracking_detect_fast(tracking, tracksbase, ibuf, sc->user.framenr, margin,
+				min_trackability, min_distance, layer, place_outside_layer);
 
 	IMB_freeImBuf(ibuf);
 
@@ -2478,7 +2614,7 @@ static int frame_jump_exec(bContext *C, wmOperator *op)
 	int delta;
 
 	if(pos<=1) {	/* jump to path */
-		track= clip->tracking.act_track;
+		track= BKE_tracking_active_track(&clip->tracking);
 
 		if(!track)
 			return OPERATOR_CANCELLED;
@@ -2498,13 +2634,16 @@ static int frame_jump_exec(bContext *C, wmOperator *op)
 		if(clip->tracking.reconstruction.flag&TRACKING_RECONSTRUCTED) {
 			int a= sc->user.framenr;
 			MovieTracking *tracking= &clip->tracking;
+			MovieTrackingObject *object= BKE_tracking_active_object(tracking);
 
 			delta= pos == 3 ? 1 : -1;
 
 			a+= delta;
 
 			while(a+delta >= SFRA && a+delta <= EFRA) {
-				MovieReconstructedCamera *cam= BKE_tracking_get_reconstructed_camera(tracking, a);
+				MovieReconstructedCamera *cam;
+
+				cam= BKE_tracking_get_reconstructed_camera(tracking, object, a);
 
 				if(!cam) {
 					sc->user.framenr= a;
@@ -2561,16 +2700,18 @@ static int join_tracks_exec(bContext *C, wmOperator *op)
 {
 	SpaceClip *sc= CTX_wm_space_clip(C);
 	MovieClip *clip= ED_space_clip(sc);
+	MovieTracking *tracking= &clip->tracking;
+	ListBase *tracksbase= BKE_tracking_get_tracks(tracking);
 	MovieTrackingTrack *act_track, *track, *next;
 
-	act_track= clip->tracking.act_track;
+	act_track= BKE_tracking_active_track(tracking);
 
 	if(!act_track) {
 		BKE_report(op->reports, RPT_ERROR, "No active track to join to");
 		return OPERATOR_CANCELLED;
 	}
 
-	track= clip->tracking.tracks.first;
+	track= tracksbase->first;
 	while(track) {
 		if(TRACK_VIEW_SELECTED(sc, track) && track!=act_track) {
 			if(!BKE_tracking_test_join_tracks(act_track, track)) {
@@ -2582,7 +2723,7 @@ static int join_tracks_exec(bContext *C, wmOperator *op)
 		track= track->next;
 	}
 
-	track= clip->tracking.tracks.first;
+	track= tracksbase->first;
 	while(track) {
 		next= track->next;
 
@@ -2590,7 +2731,7 @@ static int join_tracks_exec(bContext *C, wmOperator *op)
 			BKE_tracking_join_tracks(act_track, track);
 
 			BKE_tracking_free_track(track);
-			BLI_freelinkN(&clip->tracking.tracks, track);
+			BLI_freelinkN(tracksbase, track);
 		}
 
 		track= next;
@@ -2623,7 +2764,8 @@ static int lock_tracks_exec(bContext *C, wmOperator *op)
 	SpaceClip *sc= CTX_wm_space_clip(C);
 	MovieClip *clip= ED_space_clip(sc);
 	MovieTracking *tracking= &clip->tracking;
-	MovieTrackingTrack *track= tracking->tracks.first;
+	ListBase *tracksbase= BKE_tracking_get_tracks(tracking);
+	MovieTrackingTrack *track= tracksbase->first;
 	int action= RNA_enum_get(op->ptr, "action");
 
 	while(track) {
@@ -2672,12 +2814,14 @@ static int track_copy_color_exec(bContext *C, wmOperator *UNUSED(op))
 {
 	SpaceClip *sc= CTX_wm_space_clip(C);
 	MovieClip *clip= ED_space_clip(sc);
-	MovieTrackingTrack *track, *act_track= clip->tracking.act_track;
+	MovieTracking *tracking= &clip->tracking;
+	ListBase *tracksbase= BKE_tracking_get_tracks(tracking);
+	MovieTrackingTrack *track, *act_track= BKE_tracking_active_track(tracking);
 
 	if(!act_track)
 		return OPERATOR_CANCELLED;
 
-	track= clip->tracking.tracks.first;
+	track= tracksbase->first;
 	while(track) {
 		if(TRACK_VIEW_SELECTED(sc, track) && track!=act_track) {
 			track->flag&= ~TRACK_CUSTOMCOLOR;
@@ -2718,11 +2862,12 @@ static int stabilize_2d_add_exec(bContext *C, wmOperator *UNUSED(op))
 	SpaceClip *sc= CTX_wm_space_clip(C);
 	MovieClip *clip= ED_space_clip(sc);
 	MovieTracking *tracking= &clip->tracking;
+	ListBase *tracksbase= BKE_tracking_get_tracks(tracking);
 	MovieTrackingTrack *track;
 	MovieTrackingStabilization *stab= &tracking->stabilization;
 	int update= 0;
 
-	track= tracking->tracks.first;
+	track= tracksbase->first;
 	while(track) {
 		if(TRACK_VIEW_SELECTED(sc, track) && (track->flag&TRACK_USE_2D_STAB)==0) {
 			track->flag|= TRACK_USE_2D_STAB;
@@ -2767,10 +2912,11 @@ static int stabilize_2d_remove_exec(bContext *C, wmOperator *UNUSED(op))
 	MovieClip *clip= ED_space_clip(sc);
 	MovieTracking *tracking= &clip->tracking;
 	MovieTrackingStabilization *stab= &tracking->stabilization;
+	ListBase *tracksbase= BKE_tracking_get_tracks(tracking);
 	MovieTrackingTrack *track;
 	int a= 0, update= 0;
 
-	track= tracking->tracks.first;
+	track= tracksbase->first;
 	while(track) {
 		if(track->flag&TRACK_USE_2D_STAB) {
 			if(a==stab->act_track) {
@@ -2825,10 +2971,11 @@ static int stabilize_2d_select_exec(bContext *C, wmOperator *UNUSED(op))
 	SpaceClip *sc= CTX_wm_space_clip(C);
 	MovieClip *clip= ED_space_clip(sc);
 	MovieTracking *tracking= &clip->tracking;
+	ListBase *tracksbase= BKE_tracking_get_tracks(tracking);
 	MovieTrackingTrack *track;
 	int update= 0;
 
-	track= tracking->tracks.first;
+	track= tracksbase->first;
 	while(track) {
 		if(track->flag&TRACK_USE_2D_STAB) {
 			BKE_tracking_track_flag(track, TRACK_AREA_ALL, SELECT, 0);
@@ -2867,11 +3014,12 @@ static int stabilize_2d_set_rotation_exec(bContext *C, wmOperator *UNUSED(op))
 	SpaceClip *sc= CTX_wm_space_clip(C);
 	MovieClip *clip= ED_space_clip(sc);
 	MovieTracking *tracking= &clip->tracking;
+	MovieTrackingTrack *act_track= BKE_tracking_active_track(tracking);
 
-	if(tracking->act_track) {
+	if(act_track) {
 		MovieTrackingStabilization *stab= &tracking->stabilization;
 
-		stab->rot_track= tracking->act_track;
+		stab->rot_track= act_track;
 		stab->ok= 0;
 
 		DAG_id_tag_update(&clip->id, 0);
@@ -2996,7 +3144,8 @@ static int clean_tracks_exec(bContext *C, wmOperator *op)
 	SpaceClip *sc= CTX_wm_space_clip(C);
 	MovieClip *clip= ED_space_clip(sc);
 	MovieTracking *tracking= &clip->tracking;
-	MovieTrackingTrack *track, *next, *act_track= clip->tracking.act_track;
+	ListBase *tracksbase= BKE_tracking_get_tracks(tracking);
+	MovieTrackingTrack *track, *next, *act_track= BKE_tracking_active_track(tracking);
 	int frames= RNA_int_get(op->ptr, "frames");
 	int action= RNA_enum_get(op->ptr, "action");
 	float error= RNA_float_get(op->ptr, "error");
@@ -3004,7 +3153,7 @@ static int clean_tracks_exec(bContext *C, wmOperator *op)
 	if(error && action==TRACKING_CLEAN_DELETE_SEGMENT)
 		action= TRACKING_CLEAN_DELETE_TRACK;
 
-	track= tracking->tracks.first;
+	track= tracksbase->first;
 	while(track) {
 		next= track->next;
 
@@ -3023,7 +3172,7 @@ static int clean_tracks_exec(bContext *C, wmOperator *op)
 						clip->tracking.act_track= NULL;
 
 					BKE_tracking_free_track(track);
-					BLI_freelinkN(&clip->tracking.tracks, track);
+					BLI_freelinkN(tracksbase, track);
 					track= NULL;
 				}
 
@@ -3033,7 +3182,7 @@ static int clean_tracks_exec(bContext *C, wmOperator *op)
 						clip->tracking.act_track= NULL;
 
 					BKE_tracking_free_track(track);
-					BLI_freelinkN(&clip->tracking.tracks, track);
+					BLI_freelinkN(tracksbase, track);
 				}
 			}
 		}
@@ -3090,3 +3239,71 @@ void CLIP_OT_clean_tracks(wmOperatorType *ot)
 	RNA_def_float(ot->srna, "error", 0.0f, 0.0f, FLT_MAX, "Reprojection Error", "Effect on tracks with have got larger reprojection error", 0.0f, 100.0f);
 	RNA_def_enum(ot->srna, "action", actions_items, 0, "Action", "Cleanup action to execute");
 }
+
+/********************** add tracking object *********************/
+
+static int tracking_object_new_exec(bContext *C, wmOperator *UNUSED(op))
+{
+	SpaceClip *sc= CTX_wm_space_clip(C);
+	MovieClip *clip= ED_space_clip(sc);
+	MovieTracking *tracking= &clip->tracking;
+
+	BKE_tracking_new_object(tracking, "Object");
+
+	WM_event_add_notifier(C, NC_MOVIECLIP|NA_EDITED, clip);
+
+	return OPERATOR_FINISHED;
+}
+
+void CLIP_OT_tracking_object_new(wmOperatorType *ot)
+{
+	/* identifiers */
+	ot->name= "Add Tracking Object";
+	ot->description= "Add new object for tracking";
+	ot->idname= "CLIP_OT_tracking_object_new";
+
+	/* api callbacks */
+	ot->exec= tracking_object_new_exec;
+	ot->poll= ED_space_clip_poll;
+
+	/* flags */
+	ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;
+}
+
+/********************** remove tracking object *********************/
+
+static int tracking_object_remove_exec(bContext *C, wmOperator *op)
+{
+	SpaceClip *sc= CTX_wm_space_clip(C);
+	MovieClip *clip= ED_space_clip(sc);
+	MovieTracking *tracking= &clip->tracking;
+	MovieTrackingObject *object;
+
+	object= BKE_tracking_active_object(tracking);
+
+	if(object->flag&TRACKING_OBJECT_CAMERA) {
+		BKE_report(op->reports, RPT_WARNING, "Object used for camera tracking can't be deleted");
+		return OPERATOR_CANCELLED;
+	}
+
+	BKE_tracking_remove_object(tracking, object);
+
+	WM_event_add_notifier(C, NC_MOVIECLIP|NA_EDITED, clip);
+
+	return OPERATOR_FINISHED;
+}
+
+void CLIP_OT_tracking_object_remove(wmOperatorType *ot)
+{
+	/* identifiers */
+	ot->name= "Movie Tracking Object";
+	ot->description= "Remove object for tracking";
+	ot->idname= "CLIP_OT_tracking_object_remove";
+
+	/* api callbacks */
+	ot->exec= tracking_object_remove_exec;
+	ot->poll= ED_space_clip_poll;
+
+	/* flags */
+	ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;
+}