diff options
author | Sergey Sharybin <sergey@blender.org> | 2020-12-28 19:28:28 +0300 |
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committer | Sergey Sharybin <sergey@blender.org> | 2021-01-18 18:38:40 +0300 |
commit | 0ac8fec3be4af8d2c079142bb9638d5f1e3097ed (patch) | |
tree | 62d28a8a5de93725ffad6b1af976151794844094 /source/blender/blenkernel/intern/tracking.c | |
parent | 0ca0d3366d4c79949914e229858f0a5477b9e6ec (diff) |
Tracking: Add interpolated accessor for markers
Allows to get marker position interpolated through out a gap.
Currently unused, but is covered with test. Aimed to be used for
track average operator.
Diffstat (limited to 'source/blender/blenkernel/intern/tracking.c')
-rw-r--r-- | source/blender/blenkernel/intern/tracking.c | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/source/blender/blenkernel/intern/tracking.c b/source/blender/blenkernel/intern/tracking.c index 6cefbd746b0..7b075610ba9 100644 --- a/source/blender/blenkernel/intern/tracking.c +++ b/source/blender/blenkernel/intern/tracking.c @@ -1380,6 +1380,84 @@ MovieTrackingMarker *BKE_tracking_marker_ensure(MovieTrackingTrack *track, int f return marker; } +static const MovieTrackingMarker *get_usable_marker_for_interpolation( + struct MovieTrackingTrack *track, + const MovieTrackingMarker *anchor_marker, + const int direction) +{ + BLI_assert(direction == -1 || direction == 1); + + const MovieTrackingMarker *last_marker = track->markers + track->markersnr - 1; + const MovieTrackingMarker *current_marker = anchor_marker; + + while (current_marker >= track->markers && current_marker <= last_marker) { + if ((current_marker->flag & MARKER_DISABLED) == 0) { + return current_marker; + } + current_marker += direction; + } + + return NULL; +} + +bool BKE_tracking_marker_get_interpolated(struct MovieTrackingTrack *track, + const int framenr, + struct MovieTrackingMarker *r_marker) +{ + const MovieTrackingMarker *closest_marker = BKE_tracking_marker_get(track, framenr); + if (closest_marker == NULL) { + return false; + } + if (closest_marker->framenr == framenr && (closest_marker->flag & MARKER_DISABLED) == 0) { + *r_marker = *closest_marker; + return true; + } + + const MovieTrackingMarker *left_marker = get_usable_marker_for_interpolation( + track, closest_marker, -1); + if (left_marker == NULL) { + return false; + } + + const MovieTrackingMarker *right_marker = get_usable_marker_for_interpolation( + track, closest_marker + 1, 1); + if (right_marker == NULL) { + return false; + } + + if (left_marker == right_marker) { + *r_marker = *left_marker; + return true; + } + + const float factor = (float)(framenr - left_marker->framenr) / + (right_marker->framenr - left_marker->framenr); + + interp_v2_v2v2(r_marker->pos, left_marker->pos, right_marker->pos, factor); + + for (int i = 0; i < 4; i++) { + interp_v2_v2v2(r_marker->pattern_corners[i], + left_marker->pattern_corners[i], + right_marker->pattern_corners[i], + factor); + } + + interp_v2_v2v2(r_marker->search_min, left_marker->search_min, right_marker->search_min, factor); + interp_v2_v2v2(r_marker->search_max, left_marker->search_max, right_marker->search_max, factor); + + r_marker->framenr = framenr; + r_marker->flag = 0; + + if (framenr == left_marker->framenr) { + r_marker->flag = left_marker->flag; + } + else if (framenr == right_marker->framenr) { + r_marker->flag = right_marker->flag; + } + + return true; +} + void BKE_tracking_marker_pattern_minmax(const MovieTrackingMarker *marker, float min[2], float max[2]) |