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From Terry Welsh, new flatten static transforms visitor that duplicates subgraphs that are shared beneath differnt static transforms

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From Robert Osfield, made a range of changes to Terry's visitor integrating it into osgUtil::Optimizer and 
changing the code to use a style more like the rest of the OSG.
This commit is contained in:
Robert Osfield
2008-06-20 13:16:35 +00:00
parent ce13510b47
commit be185cb3af
2 changed files with 300 additions and 3 deletions
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38
include/osgUtil/Optimizer
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@@ -83,6 +83,7 @@ class OSGUTIL_EXPORT Optimizer
FLATTEN_BILLBOARDS = 0x2000,
TEXTURE_ATLAS_BUILDER = 0x4000,
STATIC_OBJECT_DETECTION = 0x8000,
FLATTEN_STATIC_TRANSFORMS_DUPLICATING_SHARED_SUBGRAPHS = 0x100,
DEFAULT_OPTIMIZATIONS = FLATTEN_STATIC_TRANSFORMS |
REMOVE_REDUNDANT_NODES |
REMOVE_LOADED_PROXY_NODES |
@@ -92,7 +93,7 @@ class OSGUTIL_EXPORT Optimizer
CHECK_GEOMETRY |
OPTIMIZE_TEXTURE_SETTINGS |
STATIC_OBJECT_DETECTION,
ALL_OPTIMIZATIONS = FLATTEN_STATIC_TRANSFORMS |
ALL_OPTIMIZATIONS = FLATTEN_STATIC_TRANSFORMS_DUPLICATING_SHARED_SUBGRAPHS |
REMOVE_REDUNDANT_NODES |
REMOVE_LOADED_PROXY_NODES |
COMBINE_ADJACENT_LODS |
@@ -250,7 +251,10 @@ class OSGUTIL_EXPORT Optimizer
/** Flatten Static Transform nodes by applying their transform to the
* geometry on the leaves of the scene graph, then removing the
* now redundant transforms.*/
* now redundant transforms. Static transformed Subgraphs that have multiple
* parental paths above them are not flattened, if you require this then
* the subgraphs have to be duplicated - for this use the
* FlattenStaticTransformsDuplicatingSharedSubgraphsVisitor. */
class OSGUTIL_EXPORT FlattenStaticTransformsVisitor : public BaseOptimizerVisitor
{
public:
@@ -282,6 +286,36 @@ class OSGUTIL_EXPORT Optimizer
TransformSet _transformSet;
};
/** FlattenStaticTransformsDuplicatingSharedSubgraphsVisitor is similar to
* to FlattenStaticTransformsVisitor in that is desgined to remove static transforms
* from the scene graph, pushing down the transforms to the geometry leaves of the scene graph,
* but with the difference that any subgraphs that are shared between different transforms
* of duplicated and flatten individually. This results in more static transforms
* being removed, but also means that more data is generated, and as a result may
* not always be the most appropriate flatten visitor to use.*/
class FlattenStaticTransformsDuplicatingSharedSubgraphsVisitor : public BaseOptimizerVisitor
{
public:
FlattenStaticTransformsDuplicatingSharedSubgraphsVisitor(Optimizer* optimizer=0):
BaseOptimizerVisitor(optimizer, FLATTEN_STATIC_TRANSFORMS_DUPLICATING_SHARED_SUBGRAPHS) {}
virtual void reset();
virtual void apply(osg::Group& group);
virtual void apply(osg::Transform& transform);
virtual void apply(osg::LOD& lod);
virtual void apply(osg::Geode& geode);
virtual void apply(osg::Billboard& billboard);
protected:
void transformDrawables(osg::Geode& geode);
void transformBillboard(osg::Billboard& billboard);
std::vector<osg::Matrix> _matrixStack;
};
/** Combine Static Transform nodes that sit above one another.*/
class OSGUTIL_EXPORT CombineStaticTransformsVisitor : public BaseOptimizerVisitor