BMesh: add UV delimit for select-linked, dissolve

3 files changed, 54 insertions, 0 deletions

diff --git a/source/blender/bmesh/intern/bmesh_operator_api.h b/source/blender/bmesh/intern/bmesh_operator_api.h
index 917b9a9dcf9..3f7fb7b257d 100644
--- a/source/blender/bmesh/intern/bmesh_operator_api.h
+++ b/source/blender/bmesh/intern/bmesh_operator_api.h
@@ -303,6 +303,7 @@ typedef enum {
 	BMO_DELIM_MATERIAL = 1 << 1,
 	BMO_DELIM_SEAM = 1 << 2,
 	BMO_DELIM_SHARP = 1 << 3,
+	BMO_DELIM_UV = 1 << 4,
 } BMO_Delimit;
 
 void BMO_op_flag_enable(BMesh *bm, BMOperator *op, const int op_flag);
diff --git a/source/blender/bmesh/intern/bmesh_queries.c b/source/blender/bmesh/intern/bmesh_queries.c
index 9bc45025456..4fbba5af733 100644
--- a/source/blender/bmesh/intern/bmesh_queries.c
+++ b/source/blender/bmesh/intern/bmesh_queries.c
@@ -38,6 +38,8 @@
 #include "BLI_linklist.h"
 #include "BLI_stackdefines.h"
 
+#include "BKE_customdata.h"
+
 #include "bmesh.h"
 #include "intern/bmesh_private.h"
 
@@ -1039,6 +1041,53 @@ bool BM_edge_is_convex(const BMEdge *e)
 	return true;
 }
 
+/**
+ * Returms true when loop customdata is contiguous.
+ */
+bool BM_edge_is_contiguous_loop_cd(
+        const BMEdge *e,
+        const int cd_loop_type, const int cd_loop_offset)
+{
+	BLI_assert(cd_loop_offset != -1);
+
+	if (e->l && e->l->radial_next != e->l) {
+		const BMLoop *l_base_v1 = e->l;
+		const BMLoop *l_base_v2 = e->l->next;
+		const void *l_base_cd_v1 = BM_ELEM_CD_GET_VOID_P(l_base_v1, cd_loop_offset);
+		const void *l_base_cd_v2 = BM_ELEM_CD_GET_VOID_P(l_base_v2, cd_loop_offset);
+		const BMLoop *l_iter = e->l->radial_next;
+		do {
+			const BMLoop *l_iter_v1;
+			const BMLoop *l_iter_v2;
+			const void *l_iter_cd_v1;
+			const void *l_iter_cd_v2;
+
+			if (l_iter->v == l_base_v1->v) {
+				l_iter_v1 = l_iter;
+				l_iter_v2 = l_iter->next;
+			}
+			else {
+				l_iter_v1 = l_iter->next;
+				l_iter_v2 = l_iter;
+			}
+			BLI_assert((l_iter_v1->v == l_base_v1->v) &&
+			           (l_iter_v2->v == l_base_v2->v));
+
+			l_iter_cd_v1 = BM_ELEM_CD_GET_VOID_P(l_iter_v1, cd_loop_offset);
+			l_iter_cd_v2 = BM_ELEM_CD_GET_VOID_P(l_iter_v2, cd_loop_offset);
+
+
+			if ((CustomData_data_equals(cd_loop_type, l_base_cd_v1, l_iter_cd_v1) == 0) ||
+			    (CustomData_data_equals(cd_loop_type, l_base_cd_v2, l_iter_cd_v2) == 0))
+			{
+				return false;
+			}
+
+		} while ((l_iter = l_iter->radial_next) != e->l);
+	}
+	return true;
+}
+
 bool BM_vert_is_boundary(const BMVert *v)
 {
 	if (v->e) {
diff --git a/source/blender/bmesh/intern/bmesh_queries.h b/source/blender/bmesh/intern/bmesh_queries.h
index f0a348db16a..d66bd00c2fc 100644
--- a/source/blender/bmesh/intern/bmesh_queries.h
+++ b/source/blender/bmesh/intern/bmesh_queries.h
@@ -91,6 +91,10 @@ bool    BM_vert_is_boundary(const BMVert *v) ATTR_WARN_UNUSED_RESULT ATTR_NONNUL
 BLI_INLINE bool    BM_edge_is_boundary(const BMEdge *e) ATTR_WARN_UNUSED_RESULT ATTR_NONNULL();
 BLI_INLINE bool    BM_edge_is_contiguous(const BMEdge *e) ATTR_WARN_UNUSED_RESULT ATTR_NONNULL();
 bool    BM_edge_is_convex(const BMEdge *e) ATTR_WARN_UNUSED_RESULT ATTR_NONNULL();
+bool    BM_edge_is_contiguous_loop_cd(
+        const BMEdge *e,
+        const int cd_loop_type, const int cd_loop_offset)
+        ATTR_WARN_UNUSED_RESULT ATTR_NONNULL();
 
 int     BM_loop_region_loops_count_ex(BMLoop *l, int *r_loop_total) ATTR_WARN_UNUSED_RESULT ATTR_NONNULL(1);
 int     BM_loop_region_loops_count(BMLoop *l) ATTR_WARN_UNUSED_RESULT ATTR_NONNULL(1);