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diff --git a/source/blender/collada/SkinInfo.h b/source/blender/collada/SkinInfo.h
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+++ b/source/blender/collada/SkinInfo.h
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+/**
+ * $Id$
+ *
+ * ***** BEGIN GPL LICENSE BLOCK *****
+ *
+ * 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.
+ *
+ * Contributor(s): Chingiz Dyussenov, Arystanbek Dyussenov, Nathan Letwory.
+ *
+ * ***** END GPL LICENSE BLOCK *****
+ */
+
+#ifndef __BC_SKININFO_H__
+#define __BC_SKININFO_H__
+
+#include <map>
+#include <vector>
+
+#include "COLLADAFWUniqueId.h"
+#include "COLLADAFWTypes.h"
+#include "COLLADAFWNode.h"
+#include "COLLADAFWSkinController.h"
+#include "COLLADAFWSkinControllerData.h"
+
+#include "DNA_object_types.h"
+#include "BKE_context.h"
+
+#include "TransformReader.h"
+#include "collada_internal.h"
+
+// This is used to store data passed in write_controller_data.
+// Arrays from COLLADAFW::SkinControllerData lose ownership, so do this class members
+// so that arrays don't get freed until we free them explicitly.
+class SkinInfo
+{
+private:
+	// to build armature bones from inverse bind matrices
+	struct JointData {
+		float inv_bind_mat[4][4]; // joint inverse bind matrix
+		COLLADAFW::UniqueId joint_uid; // joint node UID
+		// Object *ob_arm;			  // armature object
+	};
+
+	float bind_shape_matrix[4][4];
+
+	// data from COLLADAFW::SkinControllerData, each array should be freed
+	COLLADAFW::UIntValuesArray joints_per_vertex;
+	COLLADAFW::UIntValuesArray weight_indices;
+	COLLADAFW::IntValuesArray joint_indices;
+	// COLLADAFW::FloatOrDoubleArray weights;
+	std::vector<float> weights;
+
+	std::vector<JointData> joint_data; // index to this vector is joint index
+
+	UnitConverter *unit_converter;
+
+	Object *ob_arm;
+	COLLADAFW::UniqueId controller_uid;
+	Object *parent;
+
+public:
+
+	SkinInfo();
+	SkinInfo(const SkinInfo& skin);
+	SkinInfo(UnitConverter *conv);
+
+	// nobody owns the data after this, so it should be freed manually with releaseMemory
+	template <typename T>
+	void transfer_array_data(T& src, T& dest);
+
+	// when src is const we cannot src.yieldOwnerShip, this is used by copy constructor
+	void transfer_int_array_data_const(const COLLADAFW::IntValuesArray& src, COLLADAFW::IntValuesArray& dest);
+
+	void transfer_uint_array_data_const(const COLLADAFW::UIntValuesArray& src, COLLADAFW::UIntValuesArray& dest);
+
+	void borrow_skin_controller_data(const COLLADAFW::SkinControllerData* skin);
+		
+	void free();
+
+	// using inverse bind matrices to construct armature
+	// it is safe to invert them to get the original matrices
+	// because if they are inverse matrices, they can be inverted
+	void add_joint(const COLLADABU::Math::Matrix4& matrix);
+
+	void set_controller(const COLLADAFW::SkinController* co);
+
+	// called from write_controller
+	Object *create_armature(Scene *scene);
+
+	Object* set_armature(Object *ob_arm);
+
+	bool get_joint_inv_bind_matrix(float inv_bind_mat[][4], COLLADAFW::Node *node);
+
+	Object *get_armature();
+
+	const COLLADAFW::UniqueId& get_controller_uid();
+
+	// check if this skin controller references a joint or any descendant of it
+	// 
+	// some nodes may not be referenced by SkinController,
+	// in this case to determine if the node belongs to this armature,
+	// we need to search down the tree
+	bool uses_joint_or_descendant(COLLADAFW::Node *node);
+
+	void link_armature(bContext *C, Object *ob, std::map<COLLADAFW::UniqueId, COLLADAFW::Node*>& joint_by_uid, TransformReader *tm);
+
+	bPoseChannel *get_pose_channel_from_node(COLLADAFW::Node *node);
+
+	void set_parent(Object *_parent);
+
+	Object* get_parent();
+
+	void find_root_joints(const std::vector<COLLADAFW::Node*> &root_joints,
+						  std::map<COLLADAFW::UniqueId, COLLADAFW::Node*>& joint_by_uid,
+						  std::vector<COLLADAFW::Node*>& result);
+
+	bool find_node_in_tree(COLLADAFW::Node *node, COLLADAFW::Node *tree_root);
+
+};
+
+#endif