From 12817083ec615f9d3e3f0261d5d4247b81bfbbf8 Mon Sep 17 00:00:00 2001
From: Germano Cavalcante <germano.costa@ig.com.br>
Date: Mon, 6 Jul 2020 14:44:30 -0300
Subject: Cleanup: Use the BLI_edgehash API in the sewing simulation of cloths

Also remove the code in the ghash that is no longer used.

This change simplifies the existing code.

Differential Revision: https://developer.blender.org/D8219
---
 source/blender/blenkernel/intern/cloth.c     | 26 ++++++--------------------
 source/blender/blenkernel/intern/collision.c | 14 ++------------
 2 files changed, 8 insertions(+), 32 deletions(-)

(limited to 'source/blender/blenkernel/intern')

diff --git a/source/blender/blenkernel/intern/cloth.c b/source/blender/blenkernel/intern/cloth.c
index 6b25095a87a..7c8c1cf6653 100644
--- a/source/blender/blenkernel/intern/cloth.c
+++ b/source/blender/blenkernel/intern/cloth.c
@@ -30,7 +30,6 @@
 #include "DNA_scene_types.h"
 
 #include "BLI_edgehash.h"
-#include "BLI_ghash.h"
 #include "BLI_linklist.h"
 #include "BLI_math.h"
 #include "BLI_rand.h"
@@ -587,7 +586,7 @@ void cloth_free_modifier(ClothModifierData *clmd)
     }
 
     if (cloth->sew_edge_graph) {
-      BLI_ghash_free(cloth->sew_edge_graph, MEM_freeN, NULL);
+      BLI_edgeset_free(cloth->sew_edge_graph);
       cloth->sew_edge_graph = NULL;
     }
 
@@ -669,7 +668,7 @@ void cloth_free_modifier_extern(ClothModifierData *clmd)
     }
 
     if (cloth->sew_edge_graph) {
-      BLI_ghash_free(cloth->sew_edge_graph, MEM_freeN, NULL);
+      BLI_edgeset_free(cloth->sew_edge_graph);
       cloth->sew_edge_graph = NULL;
     }
 
@@ -1557,9 +1556,8 @@ static bool find_internal_spring_target_vertex(BVHTreeFromMesh *treedata,
     *r_tar_v_idx = vert_idx;
     return true;
   }
-  
-    return false;
-  
+
+  return false;
 }
 
 static int cloth_build_springs(ClothModifierData *clmd, Mesh *mesh)
@@ -1693,8 +1691,7 @@ static int cloth_build_springs(ClothModifierData *clmd, Mesh *mesh)
   if (clmd->sim_parms->flags & CLOTH_SIMSETTINGS_FLAG_SEW) {
     /* cloth->sew_edge_graph should not exist before this */
     BLI_assert(cloth->sew_edge_graph == NULL);
-    cloth->sew_edge_graph = BLI_ghash_new(
-        BLI_ghashutil_inthash_v2_p, BLI_ghashutil_inthash_v2_cmp, "cloth_sewing_edges_graph");
+    cloth->sew_edge_graph = BLI_edgeset_new("cloth_sewing_edges_graph");
   }
 
   /* Structural springs. */
@@ -1709,18 +1706,7 @@ static int cloth_build_springs(ClothModifierData *clmd, Mesh *mesh)
         spring->lin_stiffness = 1.0f;
         spring->type = CLOTH_SPRING_TYPE_SEWING;
 
-        /* set indices of verts of the sewing edge symmetrically in sew_edge_graph */
-        unsigned int *vertex_index_pair = MEM_mallocN(sizeof(unsigned int) * 2,
-                                                      "sewing_edge_index_pair_01");
-        if (medge[i].v1 < medge[i].v2) {
-          vertex_index_pair[0] = medge[i].v1;
-          vertex_index_pair[1] = medge[i].v2;
-        }
-        else {
-          vertex_index_pair[0] = medge[i].v2;
-          vertex_index_pair[1] = medge[i].v1;
-        }
-        BLI_ghash_insert(cloth->sew_edge_graph, vertex_index_pair, NULL);
+        BLI_edgeset_insert(cloth->sew_edge_graph, medge[i].v1, medge[i].v2);
       }
       else {
         shrink_factor = cloth_shrink_factor(clmd, cloth->verts, spring->ij, spring->kl);
diff --git a/source/blender/blenkernel/intern/collision.c b/source/blender/blenkernel/intern/collision.c
index daf1602319f..31d49dd4508 100644
--- a/source/blender/blenkernel/intern/collision.c
+++ b/source/blender/blenkernel/intern/collision.c
@@ -32,7 +32,7 @@
 #include "DNA_scene_types.h"
 
 #include "BLI_blenlib.h"
-#include "BLI_ghash.h"
+#include "BLI_edgehash.h"
 #include "BLI_linklist.h"
 #include "BLI_math.h"
 #include "BLI_task.h"
@@ -1153,17 +1153,7 @@ static bool cloth_bvh_selfcollision_is_active(const Cloth *cloth,
       }
 
       if (sewing_active) {
-        unsigned int vertex_index_pair[2];
-        /* The indices pair are ordered, thus must ensure the same here as well */
-        if (tri_a->tri[i] < tri_b->tri[j]) {
-          vertex_index_pair[0] = tri_a->tri[i];
-          vertex_index_pair[1] = tri_b->tri[j];
-        }
-        else {
-          vertex_index_pair[0] = tri_b->tri[j];
-          vertex_index_pair[1] = tri_a->tri[i];
-        }
-        if (BLI_ghash_haskey(cloth->sew_edge_graph, vertex_index_pair)) {
+        if (BLI_edgeset_haskey(cloth->sew_edge_graph, tri_a->tri[i], tri_b->tri[j])) {
           return false;
         }
       }
-- 
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