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

3 files changed, 33 insertions, 0 deletions

diff --git a/source/blender/io/common/CMakeLists.txt b/source/blender/io/common/CMakeLists.txt
index e80bd850825..a6818c0bf5d 100644
--- a/source/blender/io/common/CMakeLists.txt
+++ b/source/blender/io/common/CMakeLists.txt
@@ -8,6 +8,7 @@ set(INC
   ../../depsgraph
   ../../makesdna
   ../../../../intern/guardedalloc
+  ../../makesrna
 )
 
 set(INC_SYS
@@ -19,12 +20,14 @@ set(SRC
   intern/dupli_persistent_id.cc
   intern/object_identifier.cc
   intern/path_util.cc
+  intern/orientation.c
 
   IO_abstract_hierarchy_iterator.h
   IO_dupli_persistent_id.hh
   IO_path_util.hh
   IO_path_util_types.h
   IO_types.h
+  IO_orientation.h
   intern/dupli_parent_finder.hh
 )
 
diff --git a/source/blender/io/common/IO_orientation.h b/source/blender/io/common/IO_orientation.h
new file mode 100644
index 00000000000..09fcbc7045c
--- /dev/null
+++ b/source/blender/io/common/IO_orientation.h
@@ -0,0 +1,16 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#pragma once
+
+#include "RNA_types.h"
+
+typedef enum {
+  IO_AXIS_X = 0,
+  IO_AXIS_Y = 1,
+  IO_AXIS_Z = 2,
+  IO_AXIS_NEGATIVE_X = 3,
+  IO_AXIS_NEGATIVE_Y = 4,
+  IO_AXIS_NEGATIVE_Z = 5,
+} eIOAxis;
+
+extern const EnumPropertyItem io_transform_axis[];
diff --git a/source/blender/io/common/intern/orientation.c b/source/blender/io/common/intern/orientation.c
new file mode 100644
index 00000000000..0ffbaa8fe8e
--- /dev/null
+++ b/source/blender/io/common/intern/orientation.c
@@ -0,0 +1,14 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#include "RNA_types.h"
+
+#include "IO_orientation.h"
+
+const EnumPropertyItem io_transform_axis[] = {
+    {IO_AXIS_X, "X", 0, "X", "Positive X axis"},
+    {IO_AXIS_Y, "Y", 0, "Y", "Positive Y axis"},
+    {IO_AXIS_Z, "Z", 0, "Z", "Positive Z axis"},
+    {IO_AXIS_NEGATIVE_X, "NEGATIVE_X", 0, "-X", "Negative X axis"},
+    {IO_AXIS_NEGATIVE_Y, "NEGATIVE_Y", 0, "-Y", "Negative Y axis"},
+    {IO_AXIS_NEGATIVE_Z, "NEGATIVE_Z", 0, "-Z", "Negative Z axis"},
+    {0, NULL, 0, NULL, NULL}};