diff --git a/include/Kyoto/Streams/CInputStream.hpp b/include/Kyoto/Streams/CInputStream.hpp
index a1a298fb..86eda00c 100644
--- a/include/Kyoto/Streams/CInputStream.hpp
+++ b/include/Kyoto/Streams/CInputStream.hpp
@@ -44,6 +44,7 @@ public:
   // CIEKeyframeEmitter / rstl::vector(CInputStream&)
   // why?
   int ReadInt32() { return static_cast< uint >(Get(TType< int >())); }
+  u16 ReadUint16() { return Get<u16>(); }
 
   uint GetBlockOffset() const { return x4_blockOffset; }
 
@@ -74,6 +75,11 @@ inline char cinput_stream_helper(const TType< char >& type, CInputStream& in) {
   return in.ReadChar();
 }
 
+template <>
+inline unsigned char cinput_stream_helper(const TType< unsigned char >& type, CInputStream& in) {
+  return in.ReadChar();
+}
+
 template <>
 inline int cinput_stream_helper(const TType< int >& type, CInputStream& in) {
   return in.ReadLong();
diff --git a/include/WorldFormat/CCollisionEdge.hpp b/include/WorldFormat/CCollisionEdge.hpp
new file mode 100644
index 00000000..7255fd66
--- /dev/null
+++ b/include/WorldFormat/CCollisionEdge.hpp
@@ -0,0 +1,22 @@
+#ifndef _CCOLLISIONEDGE
+#define _CCOLLISIONEDGE
+
+#include "types.h"
+
+#include "Kyoto/Streams/CInputStream.hpp"
+
+class CCollisionEdge {
+public:
+  CCollisionEdge(CInputStream& in){
+    x0_index1 = in.Get<u16>();
+    x2_index2 = in.Get<u16>();
+  }
+
+  u16 GetVertIndex1() const { return x0_index1; }
+  u16 GetVertIndex2() const { return x2_index2; }
+private:
+  u16 x0_index1;
+  u16 x2_index2;
+};
+
+#endif // _CCOLLISIONEDGE
diff --git a/include/WorldFormat/COBBTree.hpp b/include/WorldFormat/COBBTree.hpp
new file mode 100644
index 00000000..391348d8
--- /dev/null
+++ b/include/WorldFormat/COBBTree.hpp
@@ -0,0 +1,25 @@
+#ifndef _COBBTREE
+#define _COBBTREE
+
+#include "Kyoto/Math/CVector3f.hpp"
+
+#include "WorldFormat/CCollisionEdge.hpp"
+
+
+#include "rstl/vector.hpp"
+
+
+class COBBTree {
+  struct SIndexData {
+    rstl::vector<u32> x0_materials;
+    rstl::vector<u8> x10_vertMaterials;
+    rstl::vector<u8> x20_edgeMaterials;
+    rstl::vector<u8> x30_surfaceMaterials;
+    rstl::vector<CCollisionEdge> x40_edges;
+    rstl::vector<u16> x50_surfaceIndices;
+    rstl::vector<CVector3f> x60_vertices;
+    SIndexData(CInputStream& in);
+  };
+};
+
+#endif // _COBBTREE
diff --git a/src/WorldFormat/COBBTree.cpp b/src/WorldFormat/COBBTree.cpp
new file mode 100644
index 00000000..ac24f904
--- /dev/null
+++ b/src/WorldFormat/COBBTree.cpp
@@ -0,0 +1,14 @@
+#include "WorldFormat/COBBTree.hpp"
+
+#include "Kyoto/Streams/CInputStream.hpp"
+
+
+COBBTree::SIndexData::SIndexData(CInputStream& in)
+: x0_materials(in)
+, x10_vertMaterials(in)
+, x20_edgeMaterials(in)
+, x30_surfaceMaterials(in)
+, x40_edges(in)
+, x50_surfaceIndices(in)
+, x60_vertices(in) {
+}