source/blender/editors/curves/intern/curves_selection.cc

@@ -400,7 +400,7 @@ void select_random(bke::CurvesGeometry &curves,
   selection.finish();
 }
 
-static void apply_selection_operation_at_index(GMutableSpan selection,
+void apply_selection_operation_at_index(GMutableSpan selection,
                                         const int index,
                                         const eSelectOp sel_op)
 {
@@ -440,14 +440,15 @@ static void apply_selection_operation_at_index(GMutableSpan selection,
   }
 }
 
-static bool find_closest_point_to_screen_co(const Depsgraph &depsgraph,
+static std::optional<FindClosestData> find_closest_point_to_screen_co(
+    const Depsgraph &depsgraph,
     const ARegion *region,
     const RegionView3D *rv3d,
     const Object &object,
     const bke::CurvesGeometry &curves,
     float2 mouse_pos,
     float radius,
-                                            FindClosestData &closest_data)
+    const FindClosestData &initial_closest)
 {
   float4x4 projection;
   ED_view3d_ob_project_mat_get(rv3d, &object, projection.ptr());
@@ -456,10 +457,10 @@ static bool find_closest_point_to_screen_co(const Depsgraph &depsgraph,
       bke::crazyspace::get_evaluated_curves_deformation(depsgraph, object);
 
   const float radius_sq = pow2f(radius);
-  closest_data = threading::parallel_reduce(
+  const FindClosestData new_closest_data = threading::parallel_reduce(
       curves.points_range(),
       1024,
-      closest_data,
+      initial_closest,
       [&](const IndexRange point_range, const FindClosestData &init) {
         FindClosestData best_match = init;
         for (const int point_i : point_range) {
@@ -490,21 +491,23 @@ static bool find_closest_point_to_screen_co(const Depsgraph &depsgraph,
         }
         return b;
       });
-  if (closest_data.index >= 0) {
-    return true;
+
+  if (new_closest_data.distance < initial_closest.distance) {
+    return new_closest_data;
   }
 
-  return false;
+  return {};
 }
 
-static bool find_closest_curve_to_screen_co(const Depsgraph &depsgraph,
+static std::optional<FindClosestData> find_closest_curve_to_screen_co(
+    const Depsgraph &depsgraph,
     const ARegion *region,
     const RegionView3D *rv3d,
     const Object &object,
     const bke::CurvesGeometry &curves,
     float2 mouse_pos,
     float radius,
-                                            FindClosestData &closest_data)
+    const FindClosestData &initial_closest)
 {
   float4x4 projection;
   ED_view3d_ob_project_mat_get(rv3d, &object, projection.ptr());
@@ -515,10 +518,10 @@ static bool find_closest_curve_to_screen_co(const Depsgraph &depsgraph,
   const float radius_sq = pow2f(radius);
 
   const OffsetIndices points_by_curve = curves.points_by_curve();
-  closest_data = threading::parallel_reduce(
+  const FindClosestData new_closest_data = threading::parallel_reduce(
       curves.curves_range(),
       256,
-      closest_data,
+      initial_closest,
       [&](const IndexRange curves_range, const FindClosestData &init) {
         FindClosestData best_match = init;
         for (const int curve_i : curves_range) {
@@ -578,64 +581,44 @@ static bool find_closest_curve_to_screen_co(const Depsgraph &depsgraph,
         return b;
       });
 
-  if (closest_data.index >= 0) {
-    return true;
+  if (new_closest_data.distance < initial_closest.distance) {
+    return new_closest_data;
   }
 
-  return false;
+  return {};
 }
 
-bool select_pick(const ViewContext &vc,
+std::optional<FindClosestData> closest_elem_find_screen_space(
+    const ViewContext &vc,
     const Object &object,
     bke::CurvesGeometry &curves,
-                 const eAttrDomain selection_domain,
-                 const SelectPick_Params &params,
+    const eAttrDomain domain,
     const int2 coord,
-                 FindClosestData initial)
+    const FindClosestData &initial_closest)
 {
-  FindClosestData closest = initial;
-
-  bool found = false;
-  if (selection_domain == ATTR_DOMAIN_POINT) {
-    found = find_closest_point_to_screen_co(*vc.depsgraph,
+  switch (domain) {
+    case ATTR_DOMAIN_POINT:
+      return find_closest_point_to_screen_co(*vc.depsgraph,
                                              vc.region,
                                              vc.rv3d,
                                              object,
                                              curves,
                                              float2(coord),
                                              ED_view3d_select_dist_px(),
-                                            closest);
-  }
-  else if (selection_domain == ATTR_DOMAIN_CURVE) {
-    found = find_closest_curve_to_screen_co(*vc.depsgraph,
+                                             initial_closest);
+    case ATTR_DOMAIN_CURVE:
+      return find_closest_curve_to_screen_co(*vc.depsgraph,
                                              vc.region,
                                              vc.rv3d,
                                              object,
                                              curves,
                                              float2(coord),
                                              ED_view3d_select_dist_px(),
-                                            closest);
+                                             initial_closest);
+    default:
+      BLI_assert_unreachable();
+      return {};
   }
-
-  bool deselected = false;
-  if (params.sel_op == SEL_OP_SET) {
-    bke::GSpanAttributeWriter selection = ensure_selection_attribute(
-        curves, selection_domain, CD_PROP_BOOL);
-    if (found || ((params.deselect_all && has_anything_selected(selection.span)))) {
-      fill_selection_false(selection.span);
-      deselected = true;
-    }
-    selection.finish();
-  }
-
-  if (found) {
-    bke::GSpanAttributeWriter selection = ensure_selection_attribute(
-        curves, selection_domain, CD_PROP_BOOL);
-    apply_selection_operation_at_index(selection.span, closest.index, params.sel_op);
-    selection.finish();
-  }
-
-  return deselected || found;
 }
 
 bool select_box(const ViewContext &vc,

source/blender/editors/include/ED_curves.h

@@ -128,6 +128,9 @@ bke::GSpanAttributeWriter ensure_selection_attribute(bke::CurvesGeometry &curves
                                                      eAttrDomain selection_domain,
                                                      eCustomDataType create_type);
 
+/** Apply a change to a single curve or point. Avoid using this when affecting many elements. */
+void apply_selection_operation_at_index(GMutableSpan selection, int index, eSelectOp sel_op);
+
 /**
  * (De)select all the curves.
  *
@@ -167,7 +170,7 @@ void select_random(bke::CurvesGeometry &curves,
                    float probability);
 
 /**
- * Helper struct for `select_pick`.
+ * Helper struct for `closest_elem_find_screen_space`.
  */
 struct FindClosestData {
   int index = -1;
@@ -175,15 +178,16 @@ struct FindClosestData {
 };
 
 /**
- * Select point or curve at a (screen-space) point.
+ * Find the closest screen-space point or curve in projected region-space.
+ *
+ * \return A new point or curve closer than the \a initial input, if one exists.
  */
-bool select_pick(const ViewContext &vc,
+std::optional<FindClosestData> closest_elem_find_screen_space(const ViewContext &vc,
                                                               const Object &object,
                                                               bke::CurvesGeometry &curves,
-                 eAttrDomain selection_domain,
-                 const SelectPick_Params &params,
+                                                              eAttrDomain domain,
                                                               int2 coord,
-                 FindClosestData initial = {});
+                                                              const FindClosestData &initial);
 
 /**
  * Select points or curves in a (screen-space) rectangle.

source/blender/editors/space_view3d/view3d_select.cc

@@ -31,6 +31,7 @@
 #include "BLI_math_bits.h"
 #include "BLI_rect.h"
 #include "BLI_string.h"
+#include "BLI_task.hh"
 #include "BLI_utildefines.h"
 #include "BLI_vector.hh"
 
@@ -2985,8 +2986,13 @@ static bool ed_wpaint_vertex_select_pick(bContext *C,
   return changed || found;
 }
 
+struct ClosestCurveDataBlock {
+  Curves *curves_id = nullptr;
+  blender::ed::curves::FindClosestData elem = {};
+};
+
 /**
- * Cursor selection for the Curves object.
+ * Cursor selection for all Curves objects in edit mode.
  *
  * \returns true if the selection changed.
  */
@@ -2999,35 +3005,81 @@ static bool ed_curves_select_pick(bContext &C, const int mval[2], const SelectPi
   ED_view3d_viewcontext_init(&C, &vc, depsgraph);
 
   uint bases_len;
-  Base **bases = BKE_view_layer_array_from_bases_in_edit_mode_unique_data(
+  Base **bases_ptr = BKE_view_layer_array_from_bases_in_edit_mode_unique_data(
       vc.scene, vc.view_layer, vc.v3d, &bases_len);
+  Span<Base *> bases(bases_ptr, bases_len);
 
-  bool changed = false;
-  ed::curves::FindClosestData closest_data;
-  for (uint base_index = 0; base_index < bases_len; base_index++) {
-    Base *base = bases[base_index];
-    Object *curves_ob = base->object;
-    Curves &curves_id = *static_cast<Curves *>(curves_ob->data);
-    bke::CurvesGeometry &curves = curves_id.geometry.wrap();
+  Curves &active_curves_id = *static_cast<Curves *>(vc.obedit->data);
+  const eAttrDomain selection_domain = eAttrDomain(active_curves_id.selection_domain);
 
-    if (ed::curves::select_pick(vc,
-                                *curves_ob,
-                                curves,
-                                eAttrDomain(curves_id.selection_domain),
-                                params,
+  const ClosestCurveDataBlock closest = threading::parallel_reduce(
+      bases.index_range(),
+      1L,
+      ClosestCurveDataBlock(),
+      [&](const IndexRange range, const ClosestCurveDataBlock &init) {
+        ClosestCurveDataBlock new_closest = init;
+        for (Base *base : bases.slice(range)) {
+          Object &curves_ob = *base->object;
+          Curves &curves_id = *static_cast<Curves *>(curves_ob.data);
+          std::optional<ed::curves::FindClosestData> new_closest_elem =
+              ed::curves::closest_elem_find_screen_space(vc,
+                                                         curves_ob,
+                                                         curves_id.geometry.wrap(),
+                                                         selection_domain,
                                                          mval,
-                                closest_data)) {
-      changed = true;
+                                                         new_closest.elem);
+          if (new_closest_elem) {
+            new_closest.elem = *new_closest_elem;
+            new_closest.curves_id = &curves_id;
+          }
+        }
+        return new_closest;
+      },
+      [](const ClosestCurveDataBlock &a, const ClosestCurveDataBlock &b) {
+        return (a.elem.distance < b.elem.distance) ? a : b;
+      });
+
+  std::atomic<bool> deselected = false;
+  if (params.deselect_all || params.sel_op == SEL_OP_SET) {
+    threading::parallel_for(bases.index_range(), 1L, [&](const IndexRange range) {
+      for (Base *base : bases.slice(range)) {
+        Curves &curves_id = *static_cast<Curves *>(base->object->data);
+        bke::CurvesGeometry &curves = curves_id.geometry.wrap();
+        if (ed::curves::has_anything_selected(curves)) {
+          bke::GSpanAttributeWriter selection = ed::curves::ensure_selection_attribute(
+              curves, selection_domain, CD_PROP_BOOL);
+          ed::curves::fill_selection_false(selection.span);
+          selection.finish();
+
+          deselected = true;
           /* Use #ID_RECALC_GEOMETRY instead of #ID_RECALC_SELECT because it is handled as a
            * generic attribute for now. */
           DEG_id_tag_update(&curves_id.id, ID_RECALC_GEOMETRY);
           WM_event_add_notifier(&C, NC_GEOM | ND_DATA, &curves_id);
         }
       }
+    });
+  }
 
-  MEM_freeN(bases);
+  if (!closest.curves_id) {
+    MEM_freeN(bases_ptr);
+    return deselected;
+  }
 
-  return changed;
+  bke::GSpanAttributeWriter selection = ed::curves::ensure_selection_attribute(
+      closest.curves_id->geometry.wrap(), selection_domain, CD_PROP_BOOL);
+  ed::curves::apply_selection_operation_at_index(
+      selection.span, closest.elem.index, params.sel_op);
+  selection.finish();
+
+  /* Use #ID_RECALC_GEOMETRY instead of #ID_RECALC_SELECT because it is handled as a
+   * generic attribute for now. */
+  DEG_id_tag_update(&closest.curves_id->id, ID_RECALC_GEOMETRY);
+  WM_event_add_notifier(&C, NC_GEOM | ND_DATA, closest.curves_id);
+
+  MEM_freeN(bases_ptr);
+
+  return true;
 }
 
 static int view3d_select_exec(bContext *C, wmOperator *op)
@@ -3081,7 +3133,8 @@ static int view3d_select_exec(bContext *C, wmOperator *op)
 
   if (obedit && enumerate) {
     /* Enumerate makes no sense in edit-mode unless also explicitly picking objects or bones.
-     * Pass the event through so the event may be handled by loop-select for e.g. see: #100204. */
+     * Pass the event through so the event may be handled by loop-select for e.g. see: #100204.
+     */
     if (obedit->type != OB_ARMATURE) {
       return OPERATOR_PASS_THROUGH | OPERATOR_CANCELLED;
     }