Cleanup: OBJ: Simplify access to loose edges

Implementing this with a separate function just added extra code,
there wasn't much benefit to it.

3 files changed, 7 insertions, 23 deletions

diff --git a/source/blender/io/wavefront_obj/exporter/obj_export_file_writer.cc b/source/blender/io/wavefront_obj/exporter/obj_export_file_writer.cc
index 5c81cf7abca..5289a8c750a 100644
--- a/source/blender/io/wavefront_obj/exporter/obj_export_file_writer.cc
+++ b/source/blender/io/wavefront_obj/exporter/obj_export_file_writer.cc
@@ -7,8 +7,9 @@
 #include <algorithm>
 #include <cstdio>
 
+#include "BKE_attribute.hh"
 #include "BKE_blender_version.h"
-#include "BKE_geometry_set.hh"
+#include "BKE_mesh.h"
 
 #include "BLI_color.hh"
 #include "BLI_enumerable_thread_specific.hh"
@@ -416,15 +417,12 @@ void OBJWriter::write_edges_indices(FormatHandler &fh,
                                     const OBJMesh &obj_mesh_data) const
 {
   /* NOTE: ensure_mesh_edges should be called before. */
-  const int tot_edges = obj_mesh_data.tot_edges();
-  for (int edge_index = 0; edge_index < tot_edges; edge_index++) {
-    const std::optional<std::array<int, 2>> vertex_indices =
-        obj_mesh_data.calc_loose_edge_vert_indices(edge_index);
-    if (!vertex_indices) {
-      continue;
+  const Span<MEdge> edges = obj_mesh_data.get_mesh()->edges();
+  for (const int i : edges.index_range()) {
+    const MEdge &edge = edges[i];
+    if (edge.flag & ME_LOOSEEDGE) {
+      fh.write_obj_edge(edge.v1 + offsets.vertex_offset + 1, edge.v2 + offsets.vertex_offset + 1);
     }
-    fh.write_obj_edge((*vertex_indices)[0] + offsets.vertex_offset + 1,
-                      (*vertex_indices)[1] + offsets.vertex_offset + 1);
   }
 }
 
diff --git a/source/blender/io/wavefront_obj/exporter/obj_export_mesh.cc b/source/blender/io/wavefront_obj/exporter/obj_export_mesh.cc
index f5a94b1fc8a..3b4e44ff7e4 100644
--- a/source/blender/io/wavefront_obj/exporter/obj_export_mesh.cc
+++ b/source/blender/io/wavefront_obj/exporter/obj_export_mesh.cc
@@ -507,13 +507,4 @@ const char *OBJMesh::get_poly_deform_group_name(const int16_t def_group_index) c
   return vertex_group.name;
 }
 
-std::optional<std::array<int, 2>> OBJMesh::calc_loose_edge_vert_indices(const int edge_index) const
-{
-  const Span<MEdge> edges = export_mesh_eval_->edges();
-  const MEdge &edge = edges[edge_index];
-  if (edge.flag & ME_LOOSEEDGE) {
-    return std::array<int, 2>{int(edge.v1), int(edge.v2)};
-  }
-  return std::nullopt;
-}
 }  // namespace blender::io::obj
diff --git a/source/blender/io/wavefront_obj/exporter/obj_export_mesh.hh b/source/blender/io/wavefront_obj/exporter/obj_export_mesh.hh
index ec98468e2de..89ee6f4dea2 100644
--- a/source/blender/io/wavefront_obj/exporter/obj_export_mesh.hh
+++ b/source/blender/io/wavefront_obj/exporter/obj_export_mesh.hh
@@ -216,11 +216,6 @@ class OBJMesh : NonCopyable {
   const char *get_poly_deform_group_name(int16_t def_group_index) const;
 
   /**
-   * Calculate vertex indices of an edge's corners if it is a loose edge.
-   */
-  std::optional<std::array<int, 2>> calc_loose_edge_vert_indices(int edge_index) const;
-
-  /**
    * Calculate the order in which the polygons should be written into the file (sorted by material
    * index).
    */