| 1 | /* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield |
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| 2 | * |
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| 3 | * This library is open source and may be redistributed and/or modified under |
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| 4 | * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or |
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| 5 | * (at your option) any later version. The full license is in LICENSE file |
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| 6 | * included with this distribution, and on the openscenegraph.org website. |
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| 7 | * |
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| 8 | * This library is distributed in the hope that it will be useful, |
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| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 11 | * OpenSceneGraph Public License for more details. |
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| 12 | */ |
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| 13 | |
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| 14 | #ifndef OSGSIM_INSERTIMPOSTORSVISITOR |
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| 15 | #define OSGSIM_INSERTIMPOSTORSVISITOR |
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| 16 | |
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| 17 | #include <osg/NodeVisitor> |
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| 18 | #include <osgSim/Impostor> |
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| 19 | |
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| 20 | namespace osgSim { |
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| 21 | |
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| 22 | /** Insert impostor nodes into scene graph. |
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| 23 | * For example of usage see examples/osgimpostor. |
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| 24 | */ |
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| 25 | class OSGSIM_EXPORT InsertImpostorsVisitor : public osg::NodeVisitor |
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| 26 | { |
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| 27 | public: |
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| 28 | |
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| 29 | /** Default to traversing all children. */ |
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| 30 | InsertImpostorsVisitor(); |
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| 31 | |
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| 32 | META_NodeVisitor("osgSim","InsertImpostorsVisitor") |
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| 33 | |
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| 34 | void setImpostorThresholdRatio(float ratio) { _impostorThresholdRatio = ratio; } |
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| 35 | float getImpostorThresholdRatio() const { return _impostorThresholdRatio; } |
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| 36 | |
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| 37 | void setMaximumNumberOfNestedImpostors(unsigned int num) { _maximumNumNestedImpostors = num; } |
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| 38 | unsigned int getMaximumNumberOfNestedImpostors() const { return _maximumNumNestedImpostors; } |
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| 39 | |
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| 40 | /** Empty visitor, make it ready for next traversal. */ |
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| 41 | void reset(); |
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| 42 | |
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| 43 | virtual void apply(osg::Node& node); |
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| 44 | |
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| 45 | virtual void apply(osg::Group& node); |
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| 46 | |
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| 47 | virtual void apply(osg::LOD& node); |
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| 48 | |
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| 49 | /* Insert the required impostors into the scene graph. */ |
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| 50 | void insertImpostors(); |
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| 51 | |
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| 52 | protected: |
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| 53 | |
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| 54 | typedef std::vector< osg::Group* > GroupList; |
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| 55 | typedef std::vector< osg::LOD* > LODList; |
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| 56 | |
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| 57 | GroupList _groupList; |
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| 58 | LODList _lodList; |
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| 59 | |
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| 60 | float _impostorThresholdRatio; |
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| 61 | unsigned int _maximumNumNestedImpostors; |
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| 62 | unsigned int _numNestedImpostors; |
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| 63 | |
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| 64 | }; |
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| 65 | |
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| 66 | } |
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| 67 | |
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| 68 | #endif |
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