eac3dc1963
of these are public APIs and therefore will break linkage to existing shared libraries." Note from Robert Osfield, updated wrappers.
108 lines
4.3 KiB
C++
108 lines
4.3 KiB
C++
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 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_COLLECTOCCLUDERSVISITOR
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#define OSG_COLLECTOCCLUDERSVISITOR 1
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#include <osg/NodeVisitor>
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#include <osg/CullStack>
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#include <set>
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namespace osg {
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class OSG_EXPORT CollectOccludersVisitor : public osg::NodeVisitor, public osg::CullStack
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{
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public:
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typedef std::set<ShadowVolumeOccluder> ShadowVolumeOccluderSet;
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CollectOccludersVisitor();
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virtual ~CollectOccludersVisitor();
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virtual CollectOccludersVisitor* cloneType() const { return new CollectOccludersVisitor(); }
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virtual void reset();
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virtual float getDistanceToEyePoint(const Vec3& pos, bool withLODScale) const;
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virtual float getDistanceToViewPoint(const Vec3& pos, bool withLODScale) const;
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virtual float getDistanceFromEyePoint(const Vec3& pos, bool withLODScale) const;
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virtual void apply(osg::Node&);
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virtual void apply(osg::Transform& node);
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virtual void apply(osg::Projection& node);
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virtual void apply(osg::Switch& node);
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virtual void apply(osg::LOD& node);
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virtual void apply(osg::OccluderNode& node);
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/** Sets the minimum shadow occluder volume that an active occluder
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* must have. vol is units relative the clip space volume where 1.0
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* is the whole clip space. */
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void setMinimumShadowOccluderVolume(float vol) { _minimumShadowOccluderVolume = vol; }
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float getMinimumShadowOccluderVolume() const { return _minimumShadowOccluderVolume; }
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/** Sets the maximum number of occluders to have active for culling
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* purposes. */
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void setMaximumNumberOfActiveOccluders(unsigned int num) { _maximumNumberOfActiveOccluders = num; }
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unsigned int getMaximumNumberOfActiveOccluders() const { return _maximumNumberOfActiveOccluders; }
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void setCreateDrawablesOnOccludeNodes(bool flag) { _createDrawables=flag; }
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bool getCreateDrawablesOnOccludeNodes() const { return _createDrawables; }
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void setCollectedOccluderSet(const ShadowVolumeOccluderSet& svol) { _occluderSet = svol; }
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ShadowVolumeOccluderSet& getCollectedOccluderSet() { return _occluderSet; }
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const ShadowVolumeOccluderSet& getCollectedOccluderSet() const { return _occluderSet; }
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/** Removes occluded occluders for the collected occluders list, then
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* discards all but MaximumNumberOfActiveOccluders of occluders,
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* discarding the occluders with the lowests shadow occluder volume. */
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void removeOccludedOccluders();
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protected:
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/** Prevents unwanted copy construction. */
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//CollectOccludersVisitor(const CollectOccludersVisitor&):osg::NodeVisitor(),osg::CullStack() {}
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/** Prevents unwanted copy operator. */
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CollectOccludersVisitor& operator = (const CollectOccludersVisitor&) { return *this; }
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inline void handle_cull_callbacks_and_traverse(osg::Node& node)
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{
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/*osg::NodeCallback* callback = node.getCullCallback();
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if (callback) (*callback)(&node,this);
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else*/ if (node.getNumChildrenWithOccluderNodes()>0) traverse(node);
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}
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inline void handle_cull_callbacks_and_accept(osg::Node& node,osg::Node* acceptNode)
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{
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/*osg::NodeCallback* callback = node.getCullCallback();
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if (callback) (*callback)(&node,this);
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else*/ if (node.getNumChildrenWithOccluderNodes()>0) acceptNode->accept(*this);
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}
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float _minimumShadowOccluderVolume;
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unsigned _maximumNumberOfActiveOccluders;
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bool _createDrawables;
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ShadowVolumeOccluderSet _occluderSet;
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};
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}
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#endif
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