[Bf-blender-cvs] [543ce85] master: Fix T40382: 2D stabilization uses disabled markers

[Sergey Sharybin]

Commit: 543ce859f35deb583fef1b4b71351aeb57e03354
Author: Sergey Sharybin
Date:   Thu Jun 5 19:25:21 2014 +0600
https://developer.blender.org/rB543ce859f35deb583fef1b4b71351aeb57e03354

Fix T40382: 2D stabilization uses disabled markers

This lead to unpredictable results in some cases.

===================================================================

M	source/blender/blenkernel/intern/tracking_stabilize.c

===================================================================

diff --git a/source/blender/blenkernel/intern/tracking_stabilize.c b/source/blender/blenkernel/intern/tracking_stabilize.c
index 8cdb547..540c776 100644
--- a/source/blender/blenkernel/intern/tracking_stabilize.c
+++ b/source/blender/blenkernel/intern/tracking_stabilize.c
@@ -59,11 +59,12 @@ static bool stabilization_median_point_get(MovieTracking *tracking, int framenr,
 	track = tracking->tracks.first;
 	while (track) {
 		if (track->flag & TRACK_USE_2D_STAB) {
-			MovieTrackingMarker *marker = BKE_tracking_marker_get(track, framenr);
+			MovieTrackingMarker *marker = BKE_tracking_marker_get_exact(track, framenr);
 
-			minmax_v2v2_v2(min, max, marker->pos);
-
-			ok = true;
+			if (marker != NULL && (marker->flag & MARKER_DISABLED) == 0) {
+				minmax_v2v2_v2(min, max, marker->pos);
+				ok = true;
+			}
 		}
 
 		track = track->next;
@@ -101,22 +102,26 @@ static void stabilization_calculate_data(MovieTracking *tracking, int framenr, i
 		float x0 = (float)width / 2.0f, y0 = (float)height / 2.0f;
 		float x = median[0] * width, y = median[1] * height;
 
-		marker = BKE_tracking_marker_get(stab->rot_track, 1);
-		sub_v2_v2v2(a, marker->pos, firstmedian);
-		a[0] *= width;
-		a[1] *= height;
+		marker = BKE_tracking_marker_get_exact(stab->rot_track, 1);
+		if (marker != NULL && (marker->flag & MARKER_DISABLED) == 0) {
+			sub_v2_v2v2(a, marker->pos, firstmedian);
+			a[0] *= width;
+			a[1] *= height;
 
-		marker = BKE_tracking_marker_get(stab->rot_track, framenr);
-		sub_v2_v2v2(b, marker->pos, median);
-		b[0] *= width;
-		b[1] *= height;
+			marker = BKE_tracking_marker_get_exact(stab->rot_track, framenr);
+			if (marker != NULL && (marker->flag & MARKER_DISABLED) == 0) {
+				sub_v2_v2v2(b, marker->pos, median);
+				b[0] *= width;
+				b[1] *= height;
 
-		*angle = -atan2f(a[0] * b[1] - a[1] * b[0], a[0] * b[0] + a[1] * b[1]);
-		*angle *= stab->rotinf;
+				*angle = -atan2f(a[0] * b[1] - a[1] * b[0], a[0] * b[0] + a[1] * b[1]);
+				*angle *= stab->rotinf;
 
-		/* convert to rotation around image center */
-		translation[0] -= (x0 + (x - x0) * cosf(*angle) - (y - y0) * sinf(*angle) - x) * (*scale);
-		translation[1] -= (y0 + (x - x0) * sinf(*angle) + (y - y0) * cosf(*angle) - y) * (*scale);
+				/* convert to rotation around image center */
+				translation[0] -= (x0 + (x - x0) * cosf(*angle) - (y - y0) * sinf(*angle) - x) * (*scale);
+				translation[1] -= (y0 + (x - x0) * sinf(*angle) + (y - y0) * cosf(*angle) - y) * (*scale);
+			}
+		}
 	}
 }
 
@@ -165,7 +170,9 @@ static float stabilization_calculate_autoscale_factor(MovieTracking *tracking, i
 			float points[4][2] = {{0.0f, 0.0f}, {0.0f, height}, {width, height}, {width, 0.0f}};
 			float si, co;
 
-			stabilization_median_point_get(tracking, cfra, median);
+			if (!stabilization_median_point_get(tracking, cfra, median)) {
+				break;
+			}
 
 			stabilization_calculate_data(tracking, cfra, width, height, firstmedian, median, translation,
 			                             &tmp_scale, &angle);
@@ -274,9 +281,9 @@ void BKE_tracking_stabilization_data_get(MovieTracking *tracking, int framenr, i
 	 * However, it's still better to replace this with real first
 	 * frame number at which tracks are appearing.
 	 */
-	if (stabilization_median_point_get(tracking, 1, firstmedian)) {
-		stabilization_median_point_get(tracking, framenr, median);
-
+	if (stabilization_median_point_get(tracking, 1, firstmedian) &&
+	    stabilization_median_point_get(tracking, framenr, median))
+	{
 		if ((stab->flag & TRACKING_AUTOSCALE) == 0)
 			stab->scale = 1.0f;