456 lines
17 KiB
C++
456 lines
17 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 OSGUTIL_OPTIMIZER
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#define OSGUTIL_OPTIMIZER
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#include <osg/NodeVisitor>
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#include <osg/Matrix>
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#include <osg/Geometry>
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#include <osg/Transform>
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#include <osgUtil/Export>
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#include <set>
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namespace osgUtil {
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/** Insert impostor nodes into scene graph.
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* For example of usage see src/Demos/osgimpostor.
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*/
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class OSGUTIL_EXPORT Optimizer
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{
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public:
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Optimizer() {}
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virtual ~Optimizer() {}
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enum OptimizationOptions
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{
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FLATTEN_STATIC_TRANSFORMS = 0x001,
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REMOVE_REDUNDANT_NODES = 0x002,
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COMBINE_ADJACENT_LODS = 0x004,
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SHARE_DUPLICATE_STATE = 0x008,
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MERGE_GEOMETRY = 0x010,
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CHECK_GEOMETRY = 0x020,
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SPATIALIZE_GROUPS = 0x040,
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COPY_SHARED_NODES = 0x080,
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TRISTRIP_GEOMETRY = 0x100,
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TESSELATE_GEOMETRY = 0x200,
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OPTIMIZE_TEXTURE_SETTINGS = 0x400,
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DEFAULT_OPTIMIZATIONS = FLATTEN_STATIC_TRANSFORMS |
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REMOVE_REDUNDANT_NODES |
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COMBINE_ADJACENT_LODS |
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SHARE_DUPLICATE_STATE |
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MERGE_GEOMETRY |
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CHECK_GEOMETRY |
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OPTIMIZE_TEXTURE_SETTINGS,
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ALL_OPTIMIZATIONS = FLATTEN_STATIC_TRANSFORMS |
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REMOVE_REDUNDANT_NODES |
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COMBINE_ADJACENT_LODS |
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SHARE_DUPLICATE_STATE |
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MERGE_GEOMETRY |
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CHECK_GEOMETRY |
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SPATIALIZE_GROUPS |
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COPY_SHARED_NODES |
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TRISTRIP_GEOMETRY |
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OPTIMIZE_TEXTURE_SETTINGS
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};
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/** reset internal data to initial state - the getPrimissableOptionsMap is cleared.*/
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void reset();
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/** traverse the node and its subgraph with a series of optimization
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* visitors, specificied by the OptizationOptions.*/
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void optimize(osg::Node* node);
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/** traverse the node and its subgraph with a series of optimization
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* visitors, specificied by the OptizationOptions.*/
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virtual void optimize(osg::Node* node, unsigned int options);
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inline void setPermissableOptimizationsForObject(const osg::Object* object, unsigned int options)
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{
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_permissableOptimizationsMap[object] = options;
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}
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inline unsigned int getPermissableOptimizationsForObject(const osg::Object* object) const
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{
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PermissableOptimizationsMap::const_iterator itr = _permissableOptimizationsMap.find(object);
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if (itr!=_permissableOptimizationsMap.end()) return itr->second;
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else return 0xffffffff;
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}
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inline bool isOperationPermissableForObject(const osg::Object* object,unsigned int option) const
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{
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return (option & getPermissableOptimizationsForObject(object))!=0;
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}
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typedef std::map<const osg::Object*,unsigned int> PermissableOptimizationsMap;
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PermissableOptimizationsMap& getPrimissableOptionsMap() { return _permissableOptimizationsMap; }
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const PermissableOptimizationsMap& getPrimissableOptionsMap() const { return _permissableOptimizationsMap; }
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protected:
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PermissableOptimizationsMap _permissableOptimizationsMap;
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public:
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/** Flatten Static Trasform nodes by applying their transform to the
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* geometry on the leaves of the scene graph, then removing the
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* now redundant transforms.*/
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class OSGUTIL_EXPORT FlattenStaticTransformsVisitor : public osg::NodeVisitor
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{
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public:
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FlattenStaticTransformsVisitor(Optimizer* optimizer=0):
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osg::NodeVisitor(osg::NodeVisitor::TRAVERSE_ALL_CHILDREN),
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_optimizer(optimizer) {}
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virtual void apply(osg::Geode& geode);
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virtual void apply(osg::Billboard& geode);
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virtual void apply(osg::Transform& transform);
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bool removeTransforms(osg::Node* nodeWeCannotRemove);
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inline bool isOperationPermissableForObject(const osg::Object* object) const
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{
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return _optimizer ? _optimizer->isOperationPermissableForObject(object,FLATTEN_STATIC_TRANSFORMS) : true;
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}
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protected:
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typedef std::vector<osg::Transform*> TransformStack;
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typedef std::set<osg::Drawable*> DrawableSet;
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typedef std::set<osg::Billboard*> BillboardSet;
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typedef std::set<osg::Transform*> TransformSet;
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Optimizer* _optimizer;
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TransformStack _transformStack;
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DrawableSet _drawableSet;
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BillboardSet _billboardSet;
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TransformSet _transformSet;
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};
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/** Combine Static Trasform nodes that sit above on another.*/
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class OSGUTIL_EXPORT CombineStaticTransformsVisitor : public osg::NodeVisitor
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{
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public:
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CombineStaticTransformsVisitor(Optimizer* optimizer=0):
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osg::NodeVisitor(osg::NodeVisitor::TRAVERSE_ALL_CHILDREN),
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_optimizer(optimizer) {}
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virtual void apply(osg::MatrixTransform& transform);
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bool removeTransforms(osg::Node* nodeWeCannotRemove);
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inline bool isOperationPermissableForObject(const osg::Object* object) const
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{
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return _optimizer ? _optimizer->isOperationPermissableForObject(object,FLATTEN_STATIC_TRANSFORMS) : true;
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}
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protected:
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typedef std::set<osg::MatrixTransform*> TransformSet;
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Optimizer* _optimizer;
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TransformSet _transformSet;
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};
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/** Remove rendundant nodes, such as groups with one single child.*/
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class OSGUTIL_EXPORT RemoveEmptyNodesVisitor : public osg::NodeVisitor
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{
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public:
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typedef std::set<osg::Node*> NodeList;
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NodeList _redundantNodeList;
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RemoveEmptyNodesVisitor(Optimizer* optimizer=0):
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osg::NodeVisitor(osg::NodeVisitor::TRAVERSE_ALL_CHILDREN),
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_optimizer(optimizer) {}
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virtual void apply(osg::Geode& geode);
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virtual void apply(osg::Group& group);
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void removeEmptyNodes();
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inline bool isOperationPermissableForObject(const osg::Object* object) const
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{
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return _optimizer ? _optimizer->isOperationPermissableForObject(object,REMOVE_REDUNDANT_NODES) : true;
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}
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Optimizer* _optimizer;
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};
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/** Remove rendundant nodes, such as groups with one single child.*/
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class OSGUTIL_EXPORT RemoveRedundantNodesVisitor : public osg::NodeVisitor
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{
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public:
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typedef std::set<osg::Node*> NodeList;
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NodeList _redundantNodeList;
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RemoveRedundantNodesVisitor(Optimizer* optimizer=0):
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osg::NodeVisitor(osg::NodeVisitor::TRAVERSE_ALL_CHILDREN),
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_optimizer(optimizer) {}
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virtual void apply(osg::Group& group);
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virtual void apply(osg::Transform& transform);
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void removeRedundantNodes();
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inline bool isOperationPermissableForObject(const osg::Object* object) const
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{
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return _optimizer ? _optimizer->isOperationPermissableForObject(object,REMOVE_REDUNDANT_NODES) : true;
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}
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Optimizer* _optimizer;
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};
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/** Tesselate all geodes, to remove POLYGONS
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* complementary ranges.*/
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class OSGUTIL_EXPORT TesselateVisitor : public osg::NodeVisitor
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{
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public:
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typedef std::set<osg::Group*> GroupList;
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GroupList _groupList;
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TesselateVisitor():osg::NodeVisitor(osg::NodeVisitor::TRAVERSE_ALL_CHILDREN) {}
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virtual void apply(osg::Geode& geode);
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};
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/** Optimize the LOD groups, by combining adjacent LOD's which have
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* complementary ranges.*/
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class OSGUTIL_EXPORT CombineLODsVisitor : public osg::NodeVisitor
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{
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public:
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typedef std::set<osg::Group*> GroupList;
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GroupList _groupList;
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CombineLODsVisitor(Optimizer* optimizer=0):
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osg::NodeVisitor(osg::NodeVisitor::TRAVERSE_ALL_CHILDREN),
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_optimizer(optimizer) {}
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virtual void apply(osg::LOD& lod);
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void combineLODs();
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inline bool isOperationPermissableForObject(const osg::Object* object) const
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{
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return _optimizer ? _optimizer->isOperationPermissableForObject(object,COMBINE_ADJACENT_LODS) : true;
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}
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Optimizer* _optimizer;
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};
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/** Optimize State in the scene graph by removing duplicate state,
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* replacing it with shared instances, both for StateAttributes,
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* and whole StateSets.*/
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class OSGUTIL_EXPORT StateVisitor : public osg::NodeVisitor
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{
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public:
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/// default to traversing all children.
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StateVisitor(Optimizer* optimizer=0):
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osg::NodeVisitor(osg::NodeVisitor::TRAVERSE_ALL_CHILDREN),
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_optimizer(optimizer) {}
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/** empty visitor, make it ready for next traversal.*/
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virtual void reset();
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virtual void apply(osg::Node& node);
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virtual void apply(osg::Geode& geode);
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void optimize();
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inline bool isOperationPermissableForObject(const osg::Object* object) const
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{
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return _optimizer ? _optimizer->isOperationPermissableForObject(object,SHARE_DUPLICATE_STATE) : true;
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}
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protected:
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void addStateSet(osg::StateSet* stateset,osg::Object* obj);
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typedef std::set<osg::Object*> ObjectSet;
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typedef std::map<osg::StateSet*,ObjectSet> StateSetMap;
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Optimizer* _optimizer;
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StateSetMap _statesets;
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};
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class OSGUTIL_EXPORT CheckGeometryVisitor : public osg::NodeVisitor
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{
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public:
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/// default to traversing all children.
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CheckGeometryVisitor(Optimizer* optimizer=0):
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osg::NodeVisitor(osg::NodeVisitor::TRAVERSE_ALL_CHILDREN),
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_optimizer(optimizer) {}
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virtual void apply(osg::Geode& geode) { checkGeode(geode); }
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void checkGeode(osg::Geode& geode);
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inline bool isOperationPermissableForObject(const osg::Object* object) const
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{
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return _optimizer ? _optimizer->isOperationPermissableForObject(object,CHECK_GEOMETRY) : true;
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}
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Optimizer* _optimizer;
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};
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class OSGUTIL_EXPORT MergeGeometryVisitor : public osg::NodeVisitor
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{
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public:
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/// default to traversing all children.
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MergeGeometryVisitor(Optimizer* optimizer=0) :
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osg::NodeVisitor(osg::NodeVisitor::TRAVERSE_ALL_CHILDREN),
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_optimizer(optimizer) {}
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virtual void apply(osg::Geode& geode) { mergeGeode(geode); }
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virtual void apply(osg::Billboard&) { /* don't do anything*/ }
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bool mergeGeode(osg::Geode& geode);
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static bool geometryContainsSharedArrays(osg::Geometry& geom);
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static bool mergeGeometry(osg::Geometry& lhs,osg::Geometry& rhs);
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static bool mergePrimitive(osg::DrawArrays& lhs,osg::DrawArrays& rhs);
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static bool mergePrimitive(osg::DrawArrayLengths& lhs,osg::DrawArrayLengths& rhs);
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static bool mergePrimitive(osg::DrawElementsUByte& lhs,osg::DrawElementsUByte& rhs);
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static bool mergePrimitive(osg::DrawElementsUShort& lhs,osg::DrawElementsUShort& rhs);
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static bool mergePrimitive(osg::DrawElementsUInt& lhs,osg::DrawElementsUInt& rhs);
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inline bool isOperationPermissableForObject(const osg::Object* object) const
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{
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return _optimizer ? _optimizer->isOperationPermissableForObject(object,MERGE_GEOMETRY) : true;
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}
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Optimizer* _optimizer;
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};
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/** Spatialize scene into a balanced quad/oct tree.*/
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class OSGUTIL_EXPORT SpatializeGroupsVisitor : public osg::NodeVisitor
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{
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public:
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SpatializeGroupsVisitor(Optimizer* optimizer=0):
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osg::NodeVisitor(osg::NodeVisitor::TRAVERSE_ALL_CHILDREN),
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_optimizer(optimizer) {}
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virtual void apply(osg::Group& group);
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bool divide(unsigned int maxNumTreesPerCell=8);
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bool divide(osg::Group* group, unsigned int maxNumTreesPerCell);
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typedef std::set<osg::Group*> GroupsToDivideList;
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GroupsToDivideList _groupsToDivideList;
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inline bool isOperationPermissableForObject(const osg::Object* object) const
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{
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return _optimizer ? _optimizer->isOperationPermissableForObject(object,SPATIALIZE_GROUPS) : true;
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}
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Optimizer* _optimizer;
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};
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/** Copy any shared subgraphs, enabling flattening of static transforms.*/
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class OSGUTIL_EXPORT CopySharedSubgraphsVisitor : public osg::NodeVisitor
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{
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public:
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CopySharedSubgraphsVisitor(Optimizer* optimizer=0):
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osg::NodeVisitor(osg::NodeVisitor::TRAVERSE_ALL_CHILDREN),
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_optimizer(optimizer) {}
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virtual void apply(osg::Node& node);
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void copySharedNodes();
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typedef std::set<osg::Node*> SharedNodeList;
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SharedNodeList _sharedNodeList;
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inline bool isOperationPermissableForObject(const osg::Object* object) const
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{
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return _optimizer ? _optimizer->isOperationPermissableForObject(object,COPY_SHARED_NODES) : true;
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}
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Optimizer* _optimizer;
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};
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/** For all textures apply settings.*/
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class OSGUTIL_EXPORT TextureVisitor : public osg::NodeVisitor
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{
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public:
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TextureVisitor(bool changeAutoUnRef, bool valueAutoUnRef,
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bool changeClientImageStorage, bool valueClientImageStorage,
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bool changeAnisotropy, float valueAnisotropy,
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Optimizer* optimizer=0):
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osg::NodeVisitor(osg::NodeVisitor::TRAVERSE_ALL_CHILDREN),
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_optimizer(optimizer),
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_changeAutoUnRef(changeAutoUnRef), _valueAutoUnRef(valueAutoUnRef),
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_changeClientImageStorage(changeClientImageStorage), _valueClientImageStorage(valueClientImageStorage),
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_changeAnisotropy(changeAnisotropy), _valueAnisotropy(valueAnisotropy) {}
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virtual void apply(osg::Geode& node);
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virtual void apply(osg::Node& node);
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void apply(osg::StateSet& stateset);
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void apply(osg::Texture& texture);
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inline bool isOperationPermissableForObject(const osg::Object* object) const
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{
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return _optimizer ? _optimizer->isOperationPermissableForObject(object,OPTIMIZE_TEXTURE_SETTINGS) : true;
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}
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Optimizer* _optimizer;
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bool _changeAutoUnRef, _valueAutoUnRef;
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bool _changeClientImageStorage, _valueClientImageStorage;
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bool _changeAnisotropy, _valueAnisotropy;
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};
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};
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}
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#endif
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