173 lines
8.5 KiB
C++
173 lines
8.5 KiB
C++
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield
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*
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* This library is open source and may be redistributed and/or modified under
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* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
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* (at your option) any later version. The full license is in LICENSE file
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* included with this distribution, and on the openscenegraph.org website.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* OpenSceneGraph Public License for more details.
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*/
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#ifndef OSG_PagedLOD
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#define OSG_PagedLOD 1
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#include <osg/LOD>
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namespace osg {
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/** PagedLOD.
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*/
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class OSG_EXPORT PagedLOD : public LOD
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{
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public :
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PagedLOD();
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/** Copy constructor using CopyOp to manage deep vs shallow copy.*/
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PagedLOD(const PagedLOD&,const CopyOp& copyop=CopyOp::SHALLOW_COPY);
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META_Node(osg, PagedLOD);
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virtual void traverse(NodeVisitor& nv);
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virtual bool addChild(Node *child);
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virtual bool addChild(Node *child, float min, float max);
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virtual bool addChild(Node *child, float min, float max,const std::string& filename, float priorityOffset=0.0f, float priorityScale=1.0f);
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virtual bool removeChildren(unsigned int pos,unsigned int numChildrenToRemove=1);
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/** Set the optional database osgDB::Options object to use when reading children.*/
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void setDatabaseOptions(osg::Referenced* options) { _databaseOptions = options; }
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/** Get the optional database osgDB::Options object used when reading children.*/
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osg::Referenced* getDatabaseOptions() { return _databaseOptions.get(); }
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/** Get the optional database osgDB::Options object used when reading children.*/
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const osg::Referenced* getDatabaseOptions() const { return _databaseOptions.get(); }
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/** Set the database path to prepend to children's filenames.*/
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void setDatabasePath(const std::string& path);
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/** Get the database path used to prepend to children's filenames.*/
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inline const std::string& getDatabasePath() const { return _databasePath; }
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struct OSG_EXPORT PerRangeData
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{
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PerRangeData();
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PerRangeData(const PerRangeData& prd);
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PerRangeData& operator = (const PerRangeData& prd);
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std::string _filename;
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float _priorityOffset;
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float _priorityScale;
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double _minExpiryTime;
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unsigned int _minExpiryFrames;
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double _timeStamp;
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unsigned int _frameNumber;
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unsigned int _frameNumberOfLastReleaseGLObjects;
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osg::ref_ptr<osg::Referenced> _databaseRequest;
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};
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typedef std::vector<PerRangeData> PerRangeDataList;
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void setFileName(unsigned int childNo, const std::string& filename) { expandPerRangeDataTo(childNo); _perRangeDataList[childNo]._filename=filename; }
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const std::string& getFileName(unsigned int childNo) const { return _perRangeDataList[childNo]._filename; }
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unsigned int getNumFileNames() const { return _perRangeDataList.size(); }
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void setPriorityOffset(unsigned int childNo, float priorityOffset) { expandPerRangeDataTo(childNo); _perRangeDataList[childNo]._priorityOffset=priorityOffset; }
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float getPriorityOffset(unsigned int childNo) const { return _perRangeDataList[childNo]._priorityOffset; }
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unsigned int getNumPriorityOffsets() const { return _perRangeDataList.size(); }
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void setPriorityScale(unsigned int childNo, float priorityScale) { expandPerRangeDataTo(childNo); _perRangeDataList[childNo]._priorityScale=priorityScale; }
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float getPriorityScale(unsigned int childNo) const { return _perRangeDataList[childNo]._priorityScale; }
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unsigned int getNumPriorityScales() const { return _perRangeDataList.size(); }
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/** Sets the minimum amount of time, in seconds, that must pass without a child being traversed before it can be expired. */
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void setMinimumExpiryTime(unsigned int childNo, double minTime) { expandPerRangeDataTo(childNo); _perRangeDataList[childNo]._minExpiryTime=minTime; }
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double getMinimumExpiryTime(unsigned int childNo) const { return _perRangeDataList[childNo]._minExpiryTime; }
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unsigned int getNumMinimumExpiryTimes() const { return _perRangeDataList.size(); }
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/** Sets the minimum number of frames that must be rendered without a child being traversed before it can be expired. */
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void setMinimumExpiryFrames(unsigned int childNo, unsigned int minFrames) { expandPerRangeDataTo(childNo); _perRangeDataList[childNo]._minExpiryFrames=minFrames; }
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unsigned int getMinimumExpiryFrames(unsigned int childNo) const { return _perRangeDataList[childNo]._minExpiryFrames; }
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unsigned int getNumMinimumExpiryFrames() const { return _perRangeDataList.size(); }
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void setTimeStamp(unsigned int childNo, double timeStamp) { expandPerRangeDataTo(childNo); _perRangeDataList[childNo]._timeStamp=timeStamp; }
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double getTimeStamp(unsigned int childNo) const { return _perRangeDataList[childNo]._timeStamp; }
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unsigned int getNumTimeStamps() const { return _perRangeDataList.size(); }
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void setFrameNumber(unsigned int childNo, unsigned int frameNumber) { expandPerRangeDataTo(childNo); _perRangeDataList[childNo]._frameNumber=frameNumber; }
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unsigned getFrameNumber(unsigned int childNo) const { return _perRangeDataList[childNo]._frameNumber; }
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unsigned int getNumFrameNumbers() const { return _perRangeDataList.size(); }
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/** Return the DatabaseRequest object used by the DatabasePager to keep track of file load requests
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* being carried on behalf of the DatabasePager.
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* Note, in normal OSG usage you should not set this value yourself, as this will be managed by
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* the osgDB::DatabasePager.*/
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osg::ref_ptr<osg::Referenced>& getDatabaseRequest(unsigned int childNo) { return _perRangeDataList[childNo]._databaseRequest; }
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/** Return the const DatabaseRequest object.*/
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const osg::ref_ptr<osg::Referenced>& getDatabaseRequest(unsigned int childNo) const { return _perRangeDataList[childNo]._databaseRequest; }
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/** Set the frame number of the last time that this PageLOD node was traversed.
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* Note, this frame number is automatically set by the traverse() method for all traversals (update, cull etc.).
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*/
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inline void setFrameNumberOfLastTraversal(unsigned int frameNumber) { _frameNumberOfLastTraversal=frameNumber; }
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/** Get the frame number of the last time that this PageLOD node was traversed.*/
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inline unsigned int getFrameNumberOfLastTraversal() const { return _frameNumberOfLastTraversal; }
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/** Set the number of children that the PagedLOD must keep around, even if they are older than their expiry time.*/
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inline void setNumChildrenThatCannotBeExpired(unsigned int num) { _numChildrenThatCannotBeExpired = num; }
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/** Get the number of children that the PagedLOD must keep around, even if they are older than their expiry time.*/
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unsigned int getNumChildrenThatCannotBeExpired() const { return _numChildrenThatCannotBeExpired; }
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/** Set wether you want to disable the paging in of external nodes.*/
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void setDisableExternalChildrenPaging(bool flag) { _disableExternalChildrenPaging = flag; }
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bool getDisableExternalChildrenPaging() const { return _disableExternalChildrenPaging; }
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/** Remove the children from the PagedLOD which haven't been visited since specified expiry time and expiry frame number.
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* The removed children are added to the removeChildren list passed into the method,
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* this allows the children to be deleted later at the caller's discretion.
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* Return true if children are removed, false otherwise. */
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virtual bool removeExpiredChildren(double expiryTime, unsigned int expiryFrame, NodeList& removedChildren);
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protected :
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virtual ~PagedLOD();
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void expandPerRangeDataTo(unsigned int pos);
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ref_ptr<Referenced> _databaseOptions;
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std::string _databasePath;
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unsigned int _frameNumberOfLastTraversal;
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unsigned int _numChildrenThatCannotBeExpired;
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bool _disableExternalChildrenPaging;
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PerRangeDataList _perRangeDataList;
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};
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}
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#endif
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