Sculpt Symmetrize: sculpt_symmetrize file and main loop

source/blender/editors/sculpt_paint/CMakeLists.txt

@@ -75,6 +75,7 @@ set(SRC
   sculpt_paint_color.c
   sculpt_pose.c
   sculpt_poly_loop.c
+  sculpt_symmetrize.c
   sculpt_smooth.c
   sculpt_transform.c
   sculpt_undo.c

source/blender/editors/sculpt_paint/sculpt.c

@@ -6628,6 +6628,9 @@ static void do_brush_action(Sculpt *sd, Object *ob, Brush *brush, UnifiedPaintSe
     case SCULPT_TOOL_SCENE_PROJECT:
       do_scene_project_brush(sd, ob, nodes, totnode);
       break;
+    case SCULPT_TOOL_SYMMETRIZE:
+      SCULPT_do_symmetrize_brush(sd, ob, nodes, totnode);
+      break;
   }
 
   if (!ELEM(brush->sculpt_tool, SCULPT_TOOL_SMOOTH, SCULPT_TOOL_MASK) &&

source/blender/editors/sculpt_paint/sculpt_intern.h

@@ -599,6 +599,9 @@ void SCULPT_relax_vertex(struct SculptSession *ss,
                          bool filter_boundary_face_sets,
                          float *r_final_pos);
 
+/* Symmetrize Map. */
+void SCULPT_do_symmetrize_brush(Sculpt *sd, Object *ob, PBVHNode **nodes, int totnode);
+
 /* Undo */
 
 typedef enum {

source/blender/editors/sculpt_paint/sculpt_symmetrize.c

@@ -0,0 +1,105 @@
+/*
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * The Original Code is Copyright (C) 2021 Blender Foundation.
+ * All rights reserved.
+ */
+
+/** \file
+ * \ingroup edsculpt
+ */
+
+#include "MEM_guardedalloc.h"
+
+#include "BLI_blenlib.h"
+#include "BLI_math.h"
+#include "BLI_task.h"
+
+#include "DNA_brush_types.h"
+#include "DNA_mesh_types.h"
+#include "DNA_meshdata_types.h"
+#include "DNA_object_types.h"
+
+#include "BKE_brush.h"
+#include "BKE_ccg.h"
+#include "BKE_colortools.h"
+#include "BKE_context.h"
+#include "BKE_mesh.h"
+#include "BKE_multires.h"
+#include "BKE_node.h"
+#include "BKE_object.h"
+#include "BKE_paint.h"
+#include "BKE_pbvh.h"
+#include "BKE_scene.h"
+
+#include "paint_intern.h"
+#include "sculpt_intern.h"
+
+#include "GPU_immediate.h"
+#include "GPU_immediate_util.h"
+#include "GPU_matrix.h"
+#include "GPU_state.h"
+
+#include "bmesh.h"
+
+#include <math.h>
+#include <stdlib.h>
+
+
+static void do_shape_symmetrize_brush_task_cb(void *__restrict userdata,
+                                                   const int n,
+                                                   const TaskParallelTLS *__restrict tls)
+{
+  SculptThreadedTaskData *data = userdata;
+  SculptSession *ss = data->ob->sculpt;
+  const Brush *brush = data->brush;
+
+  SculptBrushTest test;
+  SculptBrushTestFn sculpt_brush_test_sq_fn = SCULPT_brush_test_init_with_falloff_shape(
+      ss, &test, brush->falloff_shape);
+  const int thread_id = BLI_task_parallel_thread_id(tls);
+
+  PBVHVertexIter vd;
+  BKE_pbvh_vertex_iter_begin (ss->pbvh, data->nodes[n], vd, PBVH_ITER_UNIQUE) {
+
+    if (!sculpt_brush_test_sq_fn(&test, vd.co)) {
+      continue;
+    }
+
+    zero_v3(vd.co);
+
+    BKE_pbvh_vertex_iter_end;
+  }
+}
+
+/* Public functions. */
+
+/* Main Brush Function. */
+void SCULPT_do_symmetrize_brush(Sculpt *sd, Object *ob, PBVHNode **nodes, int totnode)
+{
+  SculptSession *ss = ob->sculpt;
+  Brush *brush = BKE_paint_brush(&sd->paint);
+
+  SculptThreadedTaskData data = {
+      .sd = sd,
+      .ob = ob,
+      .brush = brush,
+      .nodes = nodes,
+  };
+
+  TaskParallelSettings settings;
+  BKE_pbvh_parallel_range_settings(&settings, true, totnode);
+  BLI_task_parallel_range(0, totnode, &data, do_shape_symmetrize_brush_task_cb, &settings);
+}