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