1 files changed, 83 insertions, 0 deletions
diff --git a/intern/rigidbody/rb_convex_hull_api.cpp b/intern/rigidbody/rb_convex_hull_api.cpp
new file mode 100644
index 00000000000..c5893a4c808
--- /dev/null
+++ b/intern/rigidbody/rb_convex_hull_api.cpp
@@ -0,0 +1,83 @@
+/*
+ * 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) 2020 Blender Foundation,
+ * All rights reserved.
+ */
+
+#include "LinearMath/btConvexHullComputer.h"
+#include "RBI_hull_api.h"
+
+plConvexHull plConvexHullCompute(float (*coords)[3], int count)
+{
+  btConvexHullComputer *computer = new btConvexHullComputer;
+  computer->compute(reinterpret_cast<float *>(coords), sizeof(*coords), count, 0, 0);
+  return reinterpret_cast<plConvexHull>(computer);
+}
+
+void plConvexHullDelete(plConvexHull hull)
+{
+  btConvexHullComputer *computer(reinterpret_cast<btConvexHullComputer *>(hull));
+  delete computer;
+}
+
+int plConvexHullNumVertices(plConvexHull hull)
+{
+  btConvexHullComputer *computer(reinterpret_cast<btConvexHullComputer *>(hull));
+  return computer->vertices.size();
+}
+
+int plConvexHullNumFaces(plConvexHull hull)
+{
+  btConvexHullComputer *computer(reinterpret_cast<btConvexHullComputer *>(hull));
+  return computer->faces.size();
+}
+
+void plConvexHullGetVertex(plConvexHull hull, int n, float coords[3], int *original_index)
+{
+  btConvexHullComputer *computer(reinterpret_cast<btConvexHullComputer *>(hull));
+  const btVector3 &v(computer->vertices[n]);
+  coords[0] = v[0];
+  coords[1] = v[1];
+  coords[2] = v[2];
+  (*original_index) = computer->original_vertex_index[n];
+}
+
+int plConvexHullGetFaceSize(plConvexHull hull, int n)
+{
+  btConvexHullComputer *computer(reinterpret_cast<btConvexHullComputer *>(hull));
+  const btConvexHullComputer::Edge *e_orig, *e;
+  int count;
+
+  for (e_orig = &computer->edges[computer->faces[n]], e = e_orig, count = 0;
+       count == 0 || e != e_orig;
+       e = e->getNextEdgeOfFace(), count++) {
+    ;
+  }
+  return count;
+}
+
+void plConvexHullGetFaceVertices(plConvexHull hull, int n, int *vertices)
+{
+  btConvexHullComputer *computer(reinterpret_cast<btConvexHullComputer *>(hull));
+  const btConvexHullComputer::Edge *e_orig, *e;
+  int count;
+
+  for (e_orig = &computer->edges[computer->faces[n]], e = e_orig, count = 0;
+       count == 0 || e != e_orig;
+       e = e->getNextEdgeOfFace(), count++) {
+    vertices[count] = e->getTargetVertex();
+  }
+}