[Bf-blender-cvs] [ee9fb174f45] master: Added function to calculate the total area of a mesh.

[Sebastian Parborg]

Commit: ee9fb174f45d481a5a76522e80bcc9df58e28528
Author: Sebastian Parborg
Date:   Mon Sep 9 19:41:12 2019 +0200
Branches: master
https://developer.blender.org/rBee9fb174f45d481a5a76522e80bcc9df58e28528

Added function to calculate the total area of a mesh.

===================================================================

M	source/blender/blenkernel/BKE_mesh.h
M	source/blender/blenkernel/intern/mesh_evaluate.c

===================================================================

diff --git a/source/blender/blenkernel/BKE_mesh.h b/source/blender/blenkernel/BKE_mesh.h
index a260621ac2c..af40eef6ab5 100644
--- a/source/blender/blenkernel/BKE_mesh.h
+++ b/source/blender/blenkernel/BKE_mesh.h
@@ -477,6 +477,7 @@ void BKE_mesh_calc_poly_center(const struct MPoly *mpoly,
 float BKE_mesh_calc_poly_area(const struct MPoly *mpoly,
                               const struct MLoop *loopstart,
                               const struct MVert *mvarray);
+float BKE_mesh_calc_area(const struct Mesh *me);
 float BKE_mesh_calc_poly_uv_area(const struct MPoly *mpoly, const struct MLoopUV *uv_array);
 void BKE_mesh_calc_poly_angles(const struct MPoly *mpoly,
                                const struct MLoop *loopstart,
diff --git a/source/blender/blenkernel/intern/mesh_evaluate.c b/source/blender/blenkernel/intern/mesh_evaluate.c
index 38762109167..7a1dcb4a5fd 100644
--- a/source/blender/blenkernel/intern/mesh_evaluate.c
+++ b/source/blender/blenkernel/intern/mesh_evaluate.c
@@ -2320,6 +2320,24 @@ float BKE_mesh_calc_poly_area(const MPoly *mpoly, const MLoop *loopstart, const
   }
 }
 
+float BKE_mesh_calc_area(const Mesh *me)
+{
+  MVert *mvert = me->mvert;
+  MLoop *mloop = me->mloop;
+  MPoly *mpoly = me->mpoly;
+
+  MPoly *mp;
+  int i = me->totpoly;
+  float total_area = 0;
+
+  for (mp = mpoly; i--; mp++) {
+    MLoop *ml_start = &mloop[mp->loopstart];
+
+    total_area += BKE_mesh_calc_poly_area(mp, ml_start, mvert);
+  }
+  return total_area;
+}
+
 float BKE_mesh_calc_poly_uv_area(const MPoly *mpoly, const MLoopUV *uv_array)
 {