140 lines
4.3 KiB
Plaintext
140 lines
4.3 KiB
Plaintext
//C++ header - Open Scene Graph - Copyright (C) 1998-2001 Robert Osfield
|
|
//Distributed under the terms of the GNU Library General Public License (LGPL)
|
|
//as published by the Free Software Foundation.
|
|
|
|
#ifndef OSGUTIL_OPTIMIZER
|
|
#define OSGUTIL_OPTIMIZER
|
|
|
|
#include <osg/NodeVisitor>
|
|
#include <osg/Matrix>
|
|
|
|
#include <osgUtil/Export>
|
|
|
|
namespace osgUtil {
|
|
|
|
/** Insert impostor nodes into scene graph.
|
|
* For example of usage see src/Demos/osgimpostor.
|
|
*/
|
|
|
|
class OSGUTIL_EXPORT Optimizer
|
|
{
|
|
|
|
public:
|
|
|
|
Optimizer() {}
|
|
|
|
enum OptimizationOptions
|
|
{
|
|
FLATTEN_STATIC_TRANSFORMS = 0x1,
|
|
REMOVE_REDUNDENT_NODES = 0x2,
|
|
COMBINE_ADJACENT_LODS = 0x4,
|
|
SHARE_DUPLICATE_STATE = 0x8,
|
|
ALL_OPTIMIZATIONS = FLATTEN_STATIC_TRANSFORMS |
|
|
REMOVE_REDUNDENT_NODES |
|
|
COMBINE_ADJACENT_LODS |
|
|
SHARE_DUPLICATE_STATE
|
|
};
|
|
|
|
/** traverse the node and its subgraph with a series of optimization
|
|
* visitors, specificied by the OptizationOptions.*/
|
|
virtual void optimize(osg::Node* node, unsigned int options = ALL_OPTIMIZATIONS);
|
|
|
|
|
|
|
|
/** Flatten Static Trasform nodes by applying their transform to the
|
|
* geometry on the leaves of the scene graph, then removing the
|
|
* now redundent transforms.*/
|
|
class OSGUTIL_EXPORT FlattenStaticTransformsVisitor : public osg::NodeVisitor
|
|
{
|
|
public:
|
|
|
|
typedef std::vector<osg::Matrix> MatrixStack;
|
|
|
|
typedef std::set<osg::Transform*> TransformList;
|
|
|
|
MatrixStack _matrixStack;
|
|
TransformList _transformList;
|
|
bool _ignoreDynamicTransforms;
|
|
|
|
FlattenStaticTransformsVisitor(bool ignoreDynamicTransforms=true):
|
|
osg::NodeVisitor(osg::NodeVisitor::TRAVERSE_ALL_CHILDREN),
|
|
_ignoreDynamicTransforms(ignoreDynamicTransforms) {}
|
|
|
|
virtual void apply(osg::Geode& geode);
|
|
virtual void apply(osg::Billboard& billboard);
|
|
virtual void apply(osg::LOD& lod);
|
|
virtual void apply(osg::Transform& transform);
|
|
|
|
void removeTransforms();
|
|
|
|
};
|
|
|
|
/** Remove rendundent nodes, such as groups with one single child.*/
|
|
class OSGUTIL_EXPORT RemoveRedundentNodesVisitor : public osg::NodeVisitor
|
|
{
|
|
public:
|
|
|
|
typedef std::set<osg::Node*> NodeList;
|
|
NodeList _redundentNodeList;
|
|
|
|
RemoveRedundentNodesVisitor():osg::NodeVisitor(osg::NodeVisitor::TRAVERSE_ALL_CHILDREN) {}
|
|
|
|
virtual void apply(osg::Group& group);
|
|
|
|
void removeRedundentNodes();
|
|
|
|
};
|
|
|
|
/** Optimize the LOD groups, by combining adjacent LOD's which have
|
|
* complementary ranges.*/
|
|
class OSGUTIL_EXPORT CombineLODsVisitor : public osg::NodeVisitor
|
|
{
|
|
public:
|
|
|
|
typedef std::set<osg::Group*> GroupList;
|
|
GroupList _groupList;
|
|
|
|
CombineLODsVisitor():osg::NodeVisitor(osg::NodeVisitor::TRAVERSE_ALL_CHILDREN) {}
|
|
|
|
virtual void apply(osg::LOD& lod);
|
|
|
|
void combineLODs();
|
|
|
|
};
|
|
|
|
/** Optimize State in the scene graph by removing duplicate state,
|
|
* replacing it with shared instances, both for StateAttributes,
|
|
* and whole StateSets.*/
|
|
class OSGUTIL_EXPORT StateVisitor : public osg::NodeVisitor
|
|
{
|
|
public:
|
|
|
|
/// default to traversing all children.
|
|
StateVisitor() : osg::NodeVisitor(TRAVERSE_ALL_CHILDREN) {}
|
|
|
|
/** empty visitor, make it ready for next traversal.*/
|
|
virtual void reset();
|
|
|
|
virtual void apply(osg::Node& node);
|
|
|
|
virtual void apply(osg::Geode& geode);
|
|
|
|
void optimize();
|
|
|
|
protected:
|
|
|
|
void addStateSet(osg::StateSet* stateset,osg::Object* obj);
|
|
|
|
typedef std::set<osg::Object*> ObjectSet;
|
|
typedef std::map<osg::StateSet*,ObjectSet> StateSetMap;
|
|
|
|
StateSetMap _statesets;
|
|
|
|
};
|
|
|
|
};
|
|
|
|
};
|
|
|
|
#endif
|