1 files changed, 21 insertions, 0 deletions
diff --git a/extern/bullet/BulletDynamics/CollisionDispatch/UnionFind.h b/extern/bullet/BulletDynamics/CollisionDispatch/UnionFind.h
new file mode 100644
index 00000000000..0dc57783283
--- /dev/null
+++ b/extern/bullet/BulletDynamics/CollisionDispatch/UnionFind.h
@@ -0,0 +1,21 @@
+#ifndef UNION_FIND_H
+#define UNION_FIND_H
+
+///UnionFind calculates connected subsets
+class UnionFind
+  {
+    private:
+      int *id, *sz;
+	  int m_N;
+
+    public:
+      int find(int x);
+		UnionFind(int N);
+	  void	reset();
+
+      int find(int p, int q);
+      void unite(int p, int q);
+  };
+
+
+#endif //UNION_FIND_H