[Bf-blender-cvs] [ec58cbbfa6e] soc-2017-normal-tools: Add clnor_spaces counter and opaque userdata pointer to clnor spaces.

[Bastien Montagne]

Commit: ec58cbbfa6ea7170087736f69389d71ad9e19c1a
Author: Bastien Montagne
Date:   Mon Mar 12 17:21:13 2018 +0100
Branches: soc-2017-normal-tools
https://developer.blender.org/rBec58cbbfa6ea7170087736f69389d71ad9e19c1a

Add clnor_spaces counter and opaque userdata pointer to clnor spaces.

Those will help with weighted normals modifier incomming refactor.

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

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 bf135254941..4307b79bd37 100644
--- a/source/blender/blenkernel/BKE_mesh.h
+++ b/source/blender/blenkernel/BKE_mesh.h
@@ -222,6 +222,8 @@ typedef struct MLoopNorSpace {
 	 *     - BMLoop pointers. */
 	struct LinkNode *loops;
 	char flags;
+
+	void *user_data;  /* To be used for extended processing related to loop normal spaces (aka smooth fans). */
 } MLoopNorSpace;
 /**
  * MLoopNorSpace.flags
@@ -237,6 +239,7 @@ typedef struct MLoopNorSpaceArray {
 	MLoopNorSpace **lspacearr;    /* MLoop aligned array */
 	struct LinkNode *loops_pool;  /* Allocated once, avoids to call BLI_linklist_prepend_arena() for each loop! */
 	char data_type;               /* Whether we store loop indices, or pointers to BMLoop. */
+	int num_spaces;               /* Number of clnors spaces defined in this array. */
 	struct MemArena *mem;
 } MLoopNorSpaceArray;
 /**
diff --git a/source/blender/blenkernel/intern/mesh_evaluate.c b/source/blender/blenkernel/intern/mesh_evaluate.c
index 69a55256e5e..462c97f8a55 100644
--- a/source/blender/blenkernel/intern/mesh_evaluate.c
+++ b/source/blender/blenkernel/intern/mesh_evaluate.c
@@ -455,6 +455,8 @@ void BKE_lnor_spacearr_init(MLoopNorSpaceArray *lnors_spacearr, const int numLoo
 		mem = lnors_spacearr->mem;
 		lnors_spacearr->lspacearr = BLI_memarena_calloc(mem, sizeof(MLoopNorSpace *) * (size_t)numLoops);
 		lnors_spacearr->loops_pool = BLI_memarena_alloc(mem, sizeof(LinkNode) * (size_t)numLoops);
+
+		lnors_spacearr->num_spaces = 0;
 	}
 	BLI_assert(ELEM(data_type, MLNOR_SPACEARR_BMLOOP_PTR, MLNOR_SPACEARR_LOOP_INDEX));
 	lnors_spacearr->data_type = data_type;
@@ -462,21 +464,24 @@ void BKE_lnor_spacearr_init(MLoopNorSpaceArray *lnors_spacearr, const int numLoo
 
 void BKE_lnor_spacearr_clear(MLoopNorSpaceArray *lnors_spacearr)
 {
-	BLI_memarena_clear(lnors_spacearr->mem);
+	lnors_spacearr->num_spaces = 0;
 	lnors_spacearr->lspacearr = NULL;
 	lnors_spacearr->loops_pool = NULL;
+	BLI_memarena_clear(lnors_spacearr->mem);
 }
 
 void BKE_lnor_spacearr_free(MLoopNorSpaceArray *lnors_spacearr)
 {
-	BLI_memarena_free(lnors_spacearr->mem);
+	lnors_spacearr->num_spaces = 0;
 	lnors_spacearr->lspacearr = NULL;
 	lnors_spacearr->loops_pool = NULL;
+	BLI_memarena_free(lnors_spacearr->mem);
 	lnors_spacearr->mem = NULL;
 }
 
 MLoopNorSpace *BKE_lnor_space_create(MLoopNorSpaceArray *lnors_spacearr)
 {
+	lnors_spacearr->num_spaces++;
 	return BLI_memarena_calloc(lnors_spacearr->mem, sizeof(MLoopNorSpace));
 }