Cleanup: move BMesh UV queries into their own file

6 files changed, 138 insertions, 18 deletions

diff --git a/source/blender/bmesh/CMakeLists.txt b/source/blender/bmesh/CMakeLists.txt
index 7a389c63abd..09b8a06bff3 100644
--- a/source/blender/bmesh/CMakeLists.txt
+++ b/source/blender/bmesh/CMakeLists.txt
@@ -117,6 +117,8 @@ set(SRC
   intern/bmesh_private.h
   intern/bmesh_query.c
   intern/bmesh_query.h
+  intern/bmesh_query_uv.c
+  intern/bmesh_query_uv.h
   intern/bmesh_query_inline.h
   intern/bmesh_structure.c
   intern/bmesh_structure.h
diff --git a/source/blender/bmesh/bmesh.h b/source/blender/bmesh/bmesh.h
index c0791e6fdbc..c1f4b9daf27 100644
--- a/source/blender/bmesh/bmesh.h
+++ b/source/blender/bmesh/bmesh.h
@@ -223,6 +223,7 @@ extern "C" {
 #include "intern/bmesh_polygon.h"
 #include "intern/bmesh_polygon_edgenet.h"
 #include "intern/bmesh_query.h"
+#include "intern/bmesh_query_uv.h"
 #include "intern/bmesh_walkers.h"
 
 #include "intern/bmesh_inline.h"
diff --git a/source/blender/bmesh/intern/bmesh_query.c b/source/blender/bmesh/intern/bmesh_query.c
index 7cc745f248f..80634618f6f 100644
--- a/source/blender/bmesh/intern/bmesh_query.c
+++ b/source/blender/bmesh/intern/bmesh_query.c
@@ -34,8 +34,6 @@
 
 #include "BKE_customdata.h"
 
-#include "DNA_meshdata_types.h"
-
 #include "bmesh.h"
 #include "intern/bmesh_private.h"
 
@@ -1816,20 +1814,6 @@ void BM_edge_calc_face_tangent(const BMEdge *e, const BMLoop *e_loop, float r_ta
   normalize_v3(r_tangent);
 }
 
-float BM_face_calc_uv_cross(const BMFace *f, const int cd_loop_uv_offset)
-{
-  float(*uvs)[2] = BLI_array_alloca(uvs, f->len);
-  const BMLoop *l_iter;
-  const BMLoop *l_first;
-  int i = 0;
-  l_iter = l_first = BM_FACE_FIRST_LOOP(f);
-  do {
-    const MLoopUV *luv = BM_ELEM_CD_GET_VOID_P(l_iter, cd_loop_uv_offset);
-    copy_v2_v2(uvs[i++], luv->uv);
-  } while ((l_iter = l_iter->next) != l_first);
-  return cross_poly_v2(uvs, f->len);
-}
-
 /**
  * \brief BMESH VERT/EDGE ANGLE
  *
diff --git a/source/blender/bmesh/intern/bmesh_query.h b/source/blender/bmesh/intern/bmesh_query.h
index 4107fc019dd..0d95efb778f 100644
--- a/source/blender/bmesh/intern/bmesh_query.h
+++ b/source/blender/bmesh/intern/bmesh_query.h
@@ -173,8 +173,6 @@ float BM_edge_calc_face_angle_with_imat3(const BMEdge *e,
 float BM_edge_calc_face_angle_signed(const BMEdge *e) ATTR_WARN_UNUSED_RESULT ATTR_NONNULL();
 void BM_edge_calc_face_tangent(const BMEdge *e, const BMLoop *e_loop, float r_tangent[3])
     ATTR_NONNULL();
-float BM_face_calc_uv_cross(const BMFace *f, const int cd_loop_uv_offset) ATTR_WARN_UNUSED_RESULT
-    ATTR_NONNULL();
 float BM_vert_calc_edge_angle(const BMVert *v) ATTR_WARN_UNUSED_RESULT ATTR_NONNULL();
 float BM_vert_calc_edge_angle_ex(const BMVert *v, const float fallback) ATTR_WARN_UNUSED_RESULT
     ATTR_NONNULL();
diff --git a/source/blender/bmesh/intern/bmesh_query_uv.c b/source/blender/bmesh/intern/bmesh_query_uv.c
new file mode 100644
index 00000000000..6c81bc21097
--- /dev/null
+++ b/source/blender/bmesh/intern/bmesh_query_uv.c
@@ -0,0 +1,97 @@
+/*
+ * 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.
+ */
+
+/** \file
+ * \ingroup bmesh
+ */
+
+#include "MEM_guardedalloc.h"
+
+#include "BLI_alloca.h"
+#include "BLI_linklist.h"
+#include "BLI_math.h"
+#include "BLI_utildefines_stack.h"
+
+#include "BKE_customdata.h"
+
+#include "DNA_meshdata_types.h"
+
+#include "bmesh.h"
+#include "intern/bmesh_private.h"
+
+/**
+ * Calculate the UV cross product (use the sign to check the winding).
+ */
+float BM_face_uv_calc_cross(const BMFace *f, const int cd_loop_uv_offset)
+{
+  float(*uvs)[2] = BLI_array_alloca(uvs, f->len);
+  const BMLoop *l_iter;
+  const BMLoop *l_first;
+  int i = 0;
+  l_iter = l_first = BM_FACE_FIRST_LOOP(f);
+  do {
+    const MLoopUV *luv = BM_ELEM_CD_GET_VOID_P(l_iter, cd_loop_uv_offset);
+    copy_v2_v2(uvs[i++], luv->uv);
+  } while ((l_iter = l_iter->next) != l_first);
+  return cross_poly_v2(uvs, f->len);
+}
+
+/**
+ * Check if two loops that share an edge also have the same UV coordinates.
+ */
+bool BM_loop_uv_share_edge_check(BMLoop *l_a, BMLoop *l_b, const int cd_loop_uv_offset)
+{
+  BLI_assert(l_a->e == l_b->e);
+  MLoopUV *luv_a_curr = BM_ELEM_CD_GET_VOID_P(l_a, cd_loop_uv_offset);
+  MLoopUV *luv_a_next = BM_ELEM_CD_GET_VOID_P(l_a->next, cd_loop_uv_offset);
+  MLoopUV *luv_b_curr = BM_ELEM_CD_GET_VOID_P(l_b, cd_loop_uv_offset);
+  MLoopUV *luv_b_next = BM_ELEM_CD_GET_VOID_P(l_b->next, cd_loop_uv_offset);
+  if (l_a->v != l_b->v) {
+    SWAP(MLoopUV *, luv_b_curr, luv_b_next);
+  }
+  return (equals_v2v2(luv_a_curr->uv, luv_b_curr->uv) &&
+          equals_v2v2(luv_a_next->uv, luv_b_next->uv));
+}
+
+/**
+ * Check if two loops that share a vertex also have the same UV coordinates.
+ */
+bool BM_loop_uv_share_vert_check(BMEdge *e, BMLoop *l_a, BMLoop *l_b, const int cd_loop_uv_offset)
+{
+  BLI_assert(l_a->v == l_b->v);
+
+  {
+    const MLoopUV *luv_a = BM_ELEM_CD_GET_VOID_P(l_a, cd_loop_uv_offset);
+    const MLoopUV *luv_b = BM_ELEM_CD_GET_VOID_P(l_b, cd_loop_uv_offset);
+    if (!equals_v2v2(luv_a->uv, luv_b->uv)) {
+      return false;
+    }
+  }
+
+  /* No need for NULL checks, these will always succeed. */
+  const BMLoop *l_other_a = BM_loop_other_vert_loop_by_edge(l_a, e);
+  const BMLoop *l_other_b = BM_loop_other_vert_loop_by_edge(l_b, e);
+
+  {
+    const MLoopUV *luv_other_a = BM_ELEM_CD_GET_VOID_P(l_other_a, cd_loop_uv_offset);
+    const MLoopUV *luv_other_b = BM_ELEM_CD_GET_VOID_P(l_other_b, cd_loop_uv_offset);
+    if (!equals_v2v2(luv_other_a->uv, luv_other_b->uv)) {
+      return false;
+    }
+  }
+
+  return true;
+}
diff --git a/source/blender/bmesh/intern/bmesh_query_uv.h b/source/blender/bmesh/intern/bmesh_query_uv.h
new file mode 100644
index 00000000000..9ed8671f8fe
--- /dev/null
+++ b/source/blender/bmesh/intern/bmesh_query_uv.h
@@ -0,0 +1,38 @@
+/*
+ * 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.
+ */
+
+#ifndef __BMESH_QUERY_UV_H__
+#define __BMESH_QUERY_UV_H__
+
+/** \file
+ * \ingroup bmesh
+ */
+
+float BM_face_uv_calc_cross(const BMFace *f, const int cd_loop_uv_offset) ATTR_WARN_UNUSED_RESULT
+    ATTR_NONNULL();
+
+bool BM_loop_uv_share_edge_check(BMLoop *l_a,
+                                    BMLoop *l_b,
+                                    const int cd_loop_uv_offset) ATTR_WARN_UNUSED_RESULT
+    ATTR_NONNULL();
+
+bool BM_loop_uv_share_vert_check(BMEdge *e,
+                                    BMLoop *l_a,
+                                    BMLoop *l_b,
+                                    const int cd_loop_uv_offset) ATTR_WARN_UNUSED_RESULT
+    ATTR_NONNULL();
+
+#endif /* __BMESH_QUERY_UV_H__ */