Cleanup: Rename original curve object type enum

This commit renames enums related the "Curve" object type and ID type
to add `_LEGACY` to the end. The idea is to make our aspirations clearer
in the code and to avoid ambiguities between `CURVE` and `CURVES`.

Ref T95355

To summarize for the record, the plans are:
- In the short/medium term, replace the `Curve` object data type with
 `Curves`
- In the longer term (no immediate plans), use a proper data block for
  3D text and surfaces.

Differential Revision: https://developer.blender.org/D14114

2 files changed, 7 insertions, 6 deletions

diff --git a/source/blender/io/wavefront_obj/exporter/obj_exporter.cc b/source/blender/io/wavefront_obj/exporter/obj_exporter.cc
index 9ea75e6eb4c..2cef5192337 100644
--- a/source/blender/io/wavefront_obj/exporter/obj_exporter.cc
+++ b/source/blender/io/wavefront_obj/exporter/obj_exporter.cc
@@ -93,7 +93,7 @@ filter_supported_objects(Depsgraph *depsgraph, const OBJExportParams &export_par
       case OB_MESH:
         r_exportable_meshes.append(std::make_unique<OBJMesh>(depsgraph, export_params, object));
         break;
-      case OB_CURVE: {
+      case OB_CURVES_LEGACY: {
         Curve *curve = static_cast<Curve *>(object->data);
         Nurb *nurb{static_cast<Nurb *>(curve->nurb.first)};
         if (!nurb) {
diff --git a/source/blender/io/wavefront_obj/exporter/obj_exporter.hh b/source/blender/io/wavefront_obj/exporter/obj_exporter.hh
index 9f9ec5a6083..676b1f3598c 100644
--- a/source/blender/io/wavefront_obj/exporter/obj_exporter.hh
+++ b/source/blender/io/wavefront_obj/exporter/obj_exporter.hh
@@ -64,11 +64,12 @@ void export_frame(Depsgraph *depsgraph,
  * Find the objects to be exported in the `view_layer` of the dependency graph`depsgraph`,
  * and return them in vectors `unique_ptr`s of `OBJMesh` and `OBJCurve`.
  * If `export_params.export_selected_objects` is set, then only selected objects are to be
- * exported, else all objects are to be exported. But only objects of type `OB_MESH`, `OB_CURVE`,
- * and `OB_SURF` are supported; the rest will be ignored. If `export_params.export_curves_as_nurbs`
- * is set, then curves of type `CU_NURBS` are exported in curve form in the .obj file, otherwise
- * they are converted to mesh and returned in the `OBJMesh` vector. All other exportable types are
- * always converted to mesh and returned in the `OBJMesh` vector.
+ * exported, else all objects are to be exported. But only objects of type `OB_MESH`,
+ * `OB_CURVES_LEGACY`, and `OB_SURF` are supported; the rest will be ignored. If
+ * `export_params.export_curves_as_nurbs` is set, then curves of type `CU_NURBS` are exported in
+ * curve form in the .obj file, otherwise they are converted to mesh and returned in the `OBJMesh`
+ * vector. All other exportable types are always converted to mesh and returned in the `OBJMesh`
+ * vector.
  */
 std::pair<Vector<std::unique_ptr<OBJMesh>>, Vector<std::unique_ptr<OBJCurve>>>
 filter_supported_objects(Depsgraph *depsgraph, const OBJExportParams &export_params);