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/*
-----------------------------------------------------------------------------
This source file is part of OGRE
    (Object-oriented Graphics Rendering Engine)
For the latest info, see http://www.ogre3d.org/

Copyright (c) 2000-2012 Torus Knot Software Ltd

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
-----------------------------------------------------------------------------
*/

#ifndef __SkeletonSerializer_H__
#define __SkeletonSerializer_H__

#include "OgrePrerequisites.h"
#include "OgreSkeleton.h"
#include "OgreSerializer.h"

namespace Ogre {

	/// Skeleton compatibility versions
	enum SkeletonVersion 
	{
		/// OGRE version v1.0+
		SKELETON_VERSION_1_0,
		/// OGRE version v1.8+
		SKELETON_VERSION_1_8,
		
		/// Latest version available
		SKELETON_VERSION_LATEST = 100
	};

	/** \addtogroup Core
	*  @{
	*/
	/** \addtogroup Animation
	*  @{
	*/
	/** Class for serialising skeleton data to/from an OGRE .skeleton file.
    @remarks
        This class allows exporters to write OGRE .skeleton files easily, and allows the
        OGRE engine to import .skeleton files into instantiated OGRE Skeleton objects.
        Note that a .skeleton file includes not only the Skeleton, but also definitions of
        any Animations it uses.
    @par
        To export a Skeleton:<OL>
        <LI>Create a Skeleton object and populate it using it's methods.</LI>
        <LI>Call the exportSkeleton method</LI>
        </OL>
    */
    class _OgreExport SkeletonSerializer : public Serializer
    {
		
	public:
        SkeletonSerializer();
        virtual ~SkeletonSerializer();


        /** Exports a skeleton to the file specified. 
        @remarks
            This method takes an externally created Skeleton object, and exports both it
            and animations it uses to a .skeleton file.
        @param pSkeleton Weak reference to the Skeleton to export
        @param filename The destination filename
		@param endianMode The endian mode to write in
        */
        void exportSkeleton(const Skeleton* pSkeleton, const String& filename,
			SkeletonVersion ver = SKELETON_VERSION_LATEST, Endian endianMode = ENDIAN_NATIVE);

        /** Exports a skeleton to the stream specified. 
        @remarks
            This method takes an externally created Skeleton object, and exports both it
            and animations it uses to a .skeleton file.
        @param pSkeleton Weak reference to the Skeleton to export
        @param stream The destination stream
		@param endianMode The endian mode to write in
        */
        void exportSkeleton(const Skeleton* pSkeleton, DataStreamPtr stream,
			SkeletonVersion ver = SKELETON_VERSION_LATEST, Endian endianMode = ENDIAN_NATIVE);
        /** Imports Skeleton and animation data from a .skeleton file DataStream.
        @remarks
            This method imports data from a DataStream opened from a .skeleton file and places it's
            contents into the Skeleton object which is passed in. 
        @param stream The DataStream holding the .skeleton data. Must be initialised (pos at the start of the buffer).
        @param pDest Weak reference to the Skeleton object which will receive the data. Should be blank already.
        */
        void importSkeleton(DataStreamPtr& stream, Skeleton* pDest);

        // TODO: provide Cal3D importer?

    protected:
		
		void setWorkingVersion(SkeletonVersion ver);
		
		// Internal export methods
		void writeSkeleton(const Skeleton* pSkel, SkeletonVersion ver);
        void writeBone(const Skeleton* pSkel, const Bone* pBone);
        void writeBoneParent(const Skeleton* pSkel, unsigned short boneId, unsigned short parentId);
		void writeAnimation(const Skeleton* pSkel, const Animation* anim, SkeletonVersion ver);
        void writeAnimationTrack(const Skeleton* pSkel, const NodeAnimationTrack* track);
        void writeKeyFrame(const Skeleton* pSkel, const TransformKeyFrame* key);
		void writeSkeletonAnimationLink(const Skeleton* pSkel, 
			const LinkedSkeletonAnimationSource& link);

        // Internal import methods
		void readFileHeader(DataStreamPtr& stream);
		void readBone(DataStreamPtr& stream, Skeleton* pSkel);
        void readBoneParent(DataStreamPtr& stream, Skeleton* pSkel);
        void readAnimation(DataStreamPtr& stream, Skeleton* pSkel);
        void readAnimationTrack(DataStreamPtr& stream, Animation* anim, Skeleton* pSkel);
        void readKeyFrame(DataStreamPtr& stream, NodeAnimationTrack* track, Skeleton* pSkel);
		void readSkeletonAnimationLink(DataStreamPtr& stream, Skeleton* pSkel);

        size_t calcBoneSize(const Skeleton* pSkel, const Bone* pBone);
        size_t calcBoneSizeWithoutScale(const Skeleton* pSkel, const Bone* pBone);
        size_t calcBoneParentSize(const Skeleton* pSkel);
        size_t calcAnimationSize(const Skeleton* pSkel, const Animation* pAnim);
        size_t calcAnimationTrackSize(const Skeleton* pSkel, const NodeAnimationTrack* pTrack);
        size_t calcKeyFrameSize(const Skeleton* pSkel, const TransformKeyFrame* pKey);
        size_t calcKeyFrameSizeWithoutScale(const Skeleton* pSkel, const TransformKeyFrame* pKey);
		size_t calcSkeletonAnimationLinkSize(const Skeleton* pSkel, 
			const LinkedSkeletonAnimationSource& link);




    };
	/** @} */
	/** @} */

}


#endif