1 files changed, 44 insertions, 4 deletions

diff --git a/source/blender/blenkernel/BKE_paint.h b/source/blender/blenkernel/BKE_paint.h
index fdd3bd7cd86..db35fbde2c8 100644
--- a/source/blender/blenkernel/BKE_paint.h
+++ b/source/blender/blenkernel/BKE_paint.h
@@ -85,19 +85,33 @@ typedef enum ePaintMode {
 #define PAINT_MODE_HAS_BRUSH(mode) !ELEM(mode, PAINT_MODE_SCULPT_UV)
 
 /* overlay invalidation */
-typedef enum eOverlayControlFlags {
+typedef enum ePaintOverlayControlFlags {
   PAINT_OVERLAY_INVALID_TEXTURE_PRIMARY = 1,
   PAINT_OVERLAY_INVALID_TEXTURE_SECONDARY = (1 << 2),
   PAINT_OVERLAY_INVALID_CURVE = (1 << 3),
   PAINT_OVERLAY_OVERRIDE_CURSOR = (1 << 4),
   PAINT_OVERLAY_OVERRIDE_PRIMARY = (1 << 5),
   PAINT_OVERLAY_OVERRIDE_SECONDARY = (1 << 6),
-} eOverlayControlFlags;
+} ePaintOverlayControlFlags;
 
 #define PAINT_OVERRIDE_MASK \
   (PAINT_OVERLAY_OVERRIDE_SECONDARY | PAINT_OVERLAY_OVERRIDE_PRIMARY | \
    PAINT_OVERLAY_OVERRIDE_CURSOR)
 
+/* Defines 8 areas resulting of splitting the object space by the XYZ axis planes. This is used to
+ * flip or mirror transform values depending on where the vertex is and where the transform
+ * operation started to support XYZ symmetry on those operations in a predictable way. */
+
+#define PAINT_SYMM_AREA_DEFAULT 0
+
+typedef enum ePaintSymmetryAreas {
+  PAINT_SYMM_AREA_X = (1 << 0),
+  PAINT_SYMM_AREA_Y = (1 << 1),
+  PAINT_SYMM_AREA_Z = (1 << 2),
+} ePaintSymmetryAreas;
+
+#define PAINT_SYMM_AREAS 8
+
 void BKE_paint_invalidate_overlay_tex(struct Scene *scene,
                                       struct ViewLayer *view_layer,
                                       const struct Tex *tex);
@@ -105,8 +119,8 @@ void BKE_paint_invalidate_cursor_overlay(struct Scene *scene,
                                          struct ViewLayer *view_layer,
                                          struct CurveMapping *curve);
 void BKE_paint_invalidate_overlay_all(void);
-eOverlayControlFlags BKE_paint_get_overlay_flags(void);
-void BKE_paint_reset_overlay_invalid(eOverlayControlFlags flag);
+ePaintOverlayControlFlags BKE_paint_get_overlay_flags(void);
+void BKE_paint_reset_overlay_invalid(ePaintOverlayControlFlags flag);
 void BKE_paint_set_overlay_override(enum eOverlayFlags flag);
 
 /* palettes */
@@ -211,6 +225,29 @@ struct SculptVertexPaintGeomMap {
   struct MeshElemMap *vert_to_poly;
 };
 
+/* Pose Brush IK Chain */
+typedef struct SculptPoseIKChainSegment {
+  float orig[3];
+  float head[3];
+
+  float initial_orig[3];
+  float initial_head[3];
+  float len;
+  float rot[4];
+  float *weights;
+
+  /* Store a 4x4 transform matrix for each of the possible combinations of enabled XYZ symmetry
+   * axis. */
+  float trans_mat[PAINT_SYMM_AREAS][4][4];
+  float pivot_mat[PAINT_SYMM_AREAS][4][4];
+  float pivot_mat_inv[PAINT_SYMM_AREAS][4][4];
+} SculptPoseIKChainSegment;
+
+typedef struct SculptPoseIKChain {
+  SculptPoseIKChainSegment *segments;
+  int tot_segments;
+} SculptPoseIKChain;
+
 /* Session data (mode-specific) */
 
 typedef struct SculptSession {
@@ -273,7 +310,10 @@ typedef struct SculptSession {
   /* Dynamic mesh preview */
   int *preview_vert_index_list;
   int preview_vert_index_count;
+
+  /* Pose Brush Preview */
   float pose_origin[3];
+  SculptPoseIKChain *pose_ik_chain_preview;
 
   /* Transform operator */
   float pivot_pos[3];