Add BKE mesh function to update edge/poly hidden flags from verts.

2 files changed, 34 insertions, 0 deletions

diff --git a/source/blender/blenkernel/BKE_mesh.h b/source/blender/blenkernel/BKE_mesh.h
index 65ebd23d742..7771cc7db46 100644
--- a/source/blender/blenkernel/BKE_mesh.h
+++ b/source/blender/blenkernel/BKE_mesh.h
@@ -111,6 +111,13 @@ int poly_find_loop_from_vert(const struct MPoly *poly,
 int poly_get_adj_loops_from_vert(unsigned adj_r[3], const struct MPoly *poly,
 								 const struct MLoop *mloop, unsigned vert);
 
+/* update the hide flag for edges and polys from the corresponding
+   flag in verts */
+void mesh_flush_hidden_from_verts(const struct MVert *mvert,
+								  const struct MLoop *mloop,
+								  struct MEdge *medge, int totedge,
+								  struct MPoly *mpoly, int totpoly);
+
 void unlink_mesh(struct Mesh *me);
 void free_mesh(struct Mesh *me, int unlink);
 struct Mesh *add_mesh(const char *name);
diff --git a/source/blender/blenkernel/intern/mesh.c b/source/blender/blenkernel/intern/mesh.c
index 6600099fff7..29b8ca2e2b3 100644
--- a/source/blender/blenkernel/intern/mesh.c
+++ b/source/blender/blenkernel/intern/mesh.c
@@ -2889,6 +2889,33 @@ int poly_get_adj_loops_from_vert(unsigned adj_r[3], const MPoly *poly,
 	return corner;
 }
 
+/* update the hide flag for edges and faces from the corresponding
+   flag in verts */
+void mesh_flush_hidden_from_verts(const MVert *mvert,
+								  const MLoop *mloop,
+								  MEdge *medge, int totedge,
+								  MPoly *mpoly, int totpoly)
+{
+	int i, j;
+	
+	for(i = 0; i < totedge; i++) {
+		MEdge *e = &medge[i];
+		if(mvert[e->v1].flag & ME_HIDE ||
+		   mvert[e->v2].flag & ME_HIDE)
+			e->flag |= ME_HIDE;
+		else
+			e->flag &= ~ME_HIDE;
+	}
+	for(i = 0; i < totpoly; i++) {
+		MPoly *p = &mpoly[i];
+		p->flag &= ~ME_HIDE;
+		for(j = 0; j < p->totloop; j++) {
+			if(mvert[mloop[p->loopstart + j].v].flag & ME_HIDE)
+				p->flag |= ME_HIDE;
+		}
+	}
+}
+
 /* basic vertex data functions */
 int minmax_mesh(Mesh *me, float min[3], float max[3])
 {