Fix T85467: Mask transform center doesn't take parent Track into account

Coordinate checks in `spline_under_mouse_get` need to take place with
the evaluated mask to get the right center. This is now more in line to
how this is done in `ED_mask_point_find_nearest`.

Note: similar issues are reported with box/circle/lasso selection in
T97135, will tackle these separately though.

Maniphest Tasks: T85467

Differential Revision: https://developer.blender.org/D14598

1 files changed, 22 insertions, 15 deletions

diff --git a/source/blender/editors/mask/mask_ops.c b/source/blender/editors/mask/mask_ops.c
index 1a6ac8597ae..033f899d900 100644
--- a/source/blender/editors/mask/mask_ops.c
+++ b/source/blender/editors/mask/mask_ops.c
@@ -31,6 +31,7 @@
 #include "BKE_mask.h"
 
 #include "DEG_depsgraph.h"
+#include "DEG_depsgraph_query.h"
 
 #include "DNA_mask_types.h"
 #include "DNA_object_types.h" /* SELECT */
@@ -260,7 +261,7 @@ static void mask_point_undistort_pos(SpaceClip *sc, float r_co[2], const float c
 }
 
 static bool spline_under_mouse_get(const bContext *C,
-                                   Mask *mask,
+                                   Mask *mask_orig,
                                    const float co[2],
                                    MaskLayer **r_mask_layer,
                                    MaskSpline **r_mask_spline)
@@ -275,6 +276,9 @@ static bool spline_under_mouse_get(const bContext *C,
   *r_mask_layer = NULL;
   *r_mask_spline = NULL;
 
+  Depsgraph *depsgraph = CTX_data_ensure_evaluated_depsgraph(C);
+  Mask *mask_eval = (Mask *)DEG_get_evaluated_id(depsgraph, &mask_orig->id);
+
   int width, height;
   ED_mask_get_size(area, &width, &height);
   float pixel_co[2];
@@ -283,22 +287,25 @@ static bool spline_under_mouse_get(const bContext *C,
   if (sc != NULL) {
     undistort = (sc->clip != NULL) && (sc->user.render_flag & MCLIP_PROXY_RENDER_UNDISTORT) != 0;
   }
-  for (MaskLayer *mask_layer = mask->masklayers.first; mask_layer != NULL;
-       mask_layer = mask_layer->next) {
-    if (mask_layer->restrictflag & MASK_RESTRICT_SELECT) {
+
+  for (MaskLayer *mask_layer_orig = mask_orig->masklayers.first,
+           *mask_layer_eval = mask_eval->masklayers.first;
+       mask_layer_orig != NULL;
+       mask_layer_orig = mask_layer_orig->next, mask_layer_eval = mask_layer_eval->next) {
+    if (mask_layer_orig->restrictflag & MASK_RESTRICT_SELECT) {
       continue;
     }
-
-    for (MaskSpline *spline = mask_layer->splines.first; spline != NULL; spline = spline->next) {
-      MaskSplinePoint *points_array;
-      float min[2], max[2], center[2];
-      if ((spline->flag & SELECT) == 0) {
+    for (MaskSpline *spline_orig = mask_layer_orig->splines.first,
+             *spline_eval = mask_layer_eval->splines.first;
+         spline_orig != NULL;
+         spline_orig = spline_orig->next, spline_eval = spline_eval->next) {
+      if ((spline_orig->flag & SELECT) == 0) {
         continue;
       }
-
-      points_array = BKE_mask_spline_point_array(spline);
+      MaskSplinePoint *points_array = BKE_mask_spline_point_array(spline_eval);
+      float min[2], max[2], center[2];
       INIT_MINMAX2(min, max);
-      for (int i = 0; i < spline->tot_point; i++) {
+      for (int i = 0; i < spline_orig->tot_point; i++) {
         MaskSplinePoint *point_deform = &points_array[i];
         BezTriple *bezt = &point_deform->bezt;
 
@@ -319,8 +326,8 @@ static bool spline_under_mouse_get(const bContext *C,
       float max_bb_side = min_ff((max[0] - min[0]) * width, (max[1] - min[1]) * height);
       if (dist_squared <= max_bb_side * max_bb_side * 0.5f &&
           (closest_spline == NULL || dist_squared < closest_dist_squared)) {
-        closest_layer = mask_layer;
-        closest_spline = spline;
+        closest_layer = mask_layer_orig;
+        closest_spline = spline_orig;
         closest_dist_squared = dist_squared;
       }
     }
@@ -328,7 +335,7 @@ static bool spline_under_mouse_get(const bContext *C,
   if (closest_dist_squared < square_f(threshold) && closest_spline != NULL) {
     float diff_score;
     if (ED_mask_find_nearest_diff_point(C,
-                                        mask,
+                                        mask_orig,
                                         co,
                                         threshold,
                                         false,