Cleanup: Remove unecessary C API for direct mesh boolean

The main goal here is to remove the need for a C API to the code in
`mesh_boolean_convert.cc`. This is achieved by moving `MOD_boolean.c`
to C++ and making the necessary changes for it to compile. On top of
that there are some other slight simplifications possible to the
direct mesh boolean code: it doesn't need to copy the material
remaps, and the modifier code can use some other C++ types directly.

1 files changed, 43 insertions, 0 deletions

diff --git a/source/blender/blenkernel/BKE_mesh_boolean_convert.hh b/source/blender/blenkernel/BKE_mesh_boolean_convert.hh
new file mode 100644
index 00000000000..59f6e75183e
--- /dev/null
+++ b/source/blender/blenkernel/BKE_mesh_boolean_convert.hh
@@ -0,0 +1,43 @@
+/*
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * The Original Code is Copyright (C) 2019 Blender Foundation.
+ * All rights reserved.
+ */
+
+#pragma once
+
+/** \file
+ * \ingroup bke
+ */
+
+#include "BLI_array.hh"
+#include "BLI_float4x4.hh"
+#include "BLI_mesh_boolean.hh"
+#include "BLI_span.hh"
+
+struct Mesh;
+
+namespace blender::meshintersect {
+
+Mesh *direct_mesh_boolean(blender::Span<const Mesh *> meshes,
+                          blender::Span<const float4x4 *> obmats,
+                          const float4x4 &target_transform,
+                          blender::Span<blender::Array<short>> material_remaps,
+                          const bool use_self,
+                          const bool hole_tolerant,
+                          const int boolean_mode);
+
+}  // namespace blender::meshintersect