STL: Add new C++ based STL importer

A new experimentatl STL importer, written in C++. Roughly 7-9x faster than the
Python based one.

Reviewed By: Aras Pranckevicius, Hans Goudey.
Differential Revision: https://developer.blender.org/D14941

1 files changed, 35 insertions, 0 deletions

diff --git a/source/blender/io/stl/IO_stl.h b/source/blender/io/stl/IO_stl.h
new file mode 100644
index 00000000000..bbe537948e8
--- /dev/null
+++ b/source/blender/io/stl/IO_stl.h
@@ -0,0 +1,35 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+/** \file
+ * \ingroup stl
+ */
+
+#pragma once
+
+#include "BKE_context.h"
+#include "BLI_path_util.h"
+#include "IO_orientation.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct STLImportParams {
+  /** Full path to the source STL file to import. */
+  char filepath[FILE_MAX];
+  eIOAxis forward_axis;
+  eIOAxis up_axis;
+  bool use_facet_normal;
+  bool use_scene_unit;
+  float global_scale;
+  bool use_mesh_validate;
+};
+
+/**
+ * C-interface for the importer.
+ */
+void STL_import(bContext *C, const struct STLImportParams *import_params);
+
+#ifdef __cplusplus
+}
+#endif