122 lines
5.0 KiB
C++
122 lines
5.0 KiB
C++
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2003 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 SG_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 removeChild(Node *child);
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struct 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 _timeStamp;
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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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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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/** Set the object-space reference radius of the volume enclosed by the PagedLOD.
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* Used to detmine the bounding sphere of the PagedLOD in the absense of any children.*/
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inline void setRadius(float radius) { _radius = radius; }
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/** Get the object-space radius of the volume enclosed by the PagedLOD.*/
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inline float getRadius() const { return _radius; }
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/** Set the number of children that the PagedLOD must keep around, even if thay 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 thay are older than their expiry time.*/
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unsigned int getNumChildrenThatCannotBeExpired() const { return _numChildrenThatCannotBeExpired; }
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/** Remove the children from the PagedLOD which haven't be visited since specified expiry time.
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The removed children are added the removeChildren list passed into the method,
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this allows the children to be deleted later at the callers discression.*/
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virtual void removeExpiredChildren(double expiryTime,NodeList& removedChildren);
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protected :
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virtual ~PagedLOD() {}
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virtual bool computeBound() const;
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virtual void childRemoved(unsigned int pos, unsigned int numChildrenToRemove);
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virtual void childInserted(unsigned int pos);
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virtual void rangeRemoved(unsigned int pos, unsigned int numChildrenToRemove);
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virtual void rangeInserted(unsigned int pos);
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void expandPerRangeDataTo(unsigned int pos);
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float _radius;
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unsigned int _numChildrenThatCannotBeExpired;
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PerRangeDataList _perRangeDataList;
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};
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}
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#endif
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