320 lines
11 KiB
C++
320 lines
11 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_CULLSTACK
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#define OSG_CULLSTACK 1
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#include <osg/CullingSet>
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#include <osg/CullSettings>
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#include <osg/Viewport>
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#include <osg/fast_back_stack>
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#include <osg/Transform>
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namespace osg {
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/** A CullStack class which accumulates the current project, modelview matrices
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and the CullingSet. */
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class OSG_EXPORT CullStack : public osg::CullSettings
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{
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public:
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CullStack();
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CullStack(const CullStack& cs);
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~CullStack();
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typedef std::vector<ShadowVolumeOccluder> OccluderList;
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void reset();
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void pushCullingSet();
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void popCullingSet();
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void setOccluderList(const ShadowVolumeOccluderList& svol) { _occluderList = svol; }
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ShadowVolumeOccluderList& getOccluderList() { return _occluderList; }
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const ShadowVolumeOccluderList& getOccluderList() const { return _occluderList; }
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void pushViewport(osg::Viewport* viewport);
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void popViewport();
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void pushProjectionMatrix(osg::RefMatrix* matrix);
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void popProjectionMatrix();
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void pushModelViewMatrix(osg::RefMatrix* matrix, Transform::ReferenceFrame referenceFrame);
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void popModelViewMatrix();
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inline float getFrustumVolume() { if (_frustumVolume<0.0f) computeFrustumVolume(); return _frustumVolume; }
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/** Compute the pixel size of an object at position v, with specified radius.*/
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float pixelSize(const Vec3& v,float radius) const
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{
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return getCurrentCullingSet().pixelSize(v,radius);
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}
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/** Compute the pixel size of the bounding sphere.*/
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float pixelSize(const BoundingSphere& bs) const
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{
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return pixelSize(bs.center(),bs.radius());
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}
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/** Compute the pixel size of an object at position v, with specified radius. fabs()ed to always be positive. */
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float clampedPixelSize(const Vec3& v,float radius) const
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{
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return getCurrentCullingSet().clampedPixelSize(v,radius);
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}
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/** Compute the pixel size of the bounding sphere. fabs()ed to always be positive. */
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float clampedPixelSize(const BoundingSphere& bs) const
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{
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return clampedPixelSize(bs.center(),bs.radius());
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}
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inline void disableAndPushOccludersCurrentMask(NodePath& nodePath)
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{
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getCurrentCullingSet().disableAndPushOccludersCurrentMask(nodePath);
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}
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inline void popOccludersCurrentMask(NodePath& nodePath)
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{
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getCurrentCullingSet().popOccludersCurrentMask(nodePath);
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}
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inline bool isCulled(const std::vector<Vec3>& vertices)
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{
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return getCurrentCullingSet().isCulled(vertices);
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}
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inline bool isCulled(const BoundingBox& bb)
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{
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return bb.valid() && getCurrentCullingSet().isCulled(bb);
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}
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inline bool isCulled(const BoundingSphere& bs)
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{
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return getCurrentCullingSet().isCulled(bs);
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}
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inline bool isCulled(const osg::Node& node)
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{
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if (node.isCullingActive())
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{
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return getCurrentCullingSet().isCulled(node.getBound());
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}
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else
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{
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getCurrentCullingSet().resetCullingMask();
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return false;
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}
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}
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inline void pushCurrentMask()
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{
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getCurrentCullingSet().pushCurrentMask();
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}
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inline void popCurrentMask()
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{
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getCurrentCullingSet().popCurrentMask();
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}
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typedef std::vector< CullingSet > CullingStack;
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inline CullingStack& getClipSpaceCullingStack() { return _clipspaceCullingStack; }
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inline CullingStack& getProjectionCullingStack() { return _projectionCullingStack; }
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inline CullingStack& getModelViewCullingStack() { return _modelviewCullingStack; }
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inline CullingSet& getCurrentCullingSet() { return *_back_modelviewCullingStack; }
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inline const CullingSet& getCurrentCullingSet() const { return *_back_modelviewCullingStack; }
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inline osg::Viewport* getViewport();
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inline const osg::Viewport* getViewport() const;
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inline osg::RefMatrix* getModelViewMatrix();
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inline const osg::RefMatrix* getModelViewMatrix() const;
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inline osg::RefMatrix* getProjectionMatrix();
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inline const osg::RefMatrix* getProjectionMatrix() const;
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inline osg::Matrix getWindowMatrix() const;
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inline const osg::RefMatrix* getMVPW();
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inline const osg::Vec3& getReferenceViewPoint() const { return _referenceViewPoints.back(); }
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inline void pushReferenceViewPoint(const osg::Vec3& viewPoint) { _referenceViewPoints.push_back(viewPoint); }
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inline void popReferenceViewPoint() { _referenceViewPoints.pop_back(); }
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inline const osg::Vec3& getEyeLocal() const { return _eyePointStack.back(); }
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inline const osg::Vec3& getViewPointLocal() const { return _viewPointStack.back(); }
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inline const osg::Vec3 getUpLocal() const
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{
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const osg::Matrix& matrix = *_modelviewStack.back();
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return osg::Vec3(matrix(0,1),matrix(1,1),matrix(2,1));
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}
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inline const osg::Vec3 getLookVectorLocal() const
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{
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const osg::Matrix& matrix = *_modelviewStack.back();
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return osg::Vec3(-matrix(0,2),-matrix(1,2),-matrix(2,2));
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}
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typedef fast_back_stack< ref_ptr<RefMatrix> > MatrixStack;
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MatrixStack& getProjectionStack() { return _projectionStack; }
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const MatrixStack& getProjectionStack() const { return _projectionStack; }
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MatrixStack& getModelViewStack() { return _modelviewStack; }
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const MatrixStack& getModelViewStack() const { return _modelviewStack; }
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MatrixStack& getMVPWStack() { return _MVPW_Stack; }
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const MatrixStack& getMVPWStack() const { return _MVPW_Stack; }
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protected:
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// base set of shadow volume occluder to use in culling.
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ShadowVolumeOccluderList _occluderList;
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MatrixStack _projectionStack;
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MatrixStack _modelviewStack;
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MatrixStack _MVPW_Stack;
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typedef fast_back_stack<ref_ptr<Viewport> > ViewportStack;
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ViewportStack _viewportStack;
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typedef fast_back_stack<Vec3> EyePointStack;
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EyePointStack _referenceViewPoints;
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EyePointStack _eyePointStack;
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EyePointStack _viewPointStack;
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CullingStack _clipspaceCullingStack;
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CullingStack _projectionCullingStack;
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CullingStack _modelviewCullingStack;
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unsigned int _index_modelviewCullingStack;
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CullingSet* _back_modelviewCullingStack;
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void computeFrustumVolume();
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float _frustumVolume;
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unsigned int _bbCornerNear;
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unsigned int _bbCornerFar;
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ref_ptr<osg::RefMatrix> _identity;
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typedef std::vector< osg::ref_ptr<osg::RefMatrix> > MatrixList;
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MatrixList _reuseMatrixList;
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unsigned int _currentReuseMatrixIndex;
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inline osg::RefMatrix* createOrReuseMatrix(const osg::Matrix& value);
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};
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inline osg::Viewport* CullStack::getViewport()
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{
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return _viewportStack.empty() ? 0 : _viewportStack.back().get();
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}
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inline const osg::Viewport* CullStack::getViewport() const
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{
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return _viewportStack.empty() ? 0 : _viewportStack.back().get();
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}
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inline osg::RefMatrix* CullStack::getModelViewMatrix()
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{
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return _modelviewStack.empty() ? _identity.get() : _modelviewStack.back().get();
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}
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inline const osg::RefMatrix* CullStack::getModelViewMatrix() const
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{
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return _modelviewStack.empty() ? _identity.get() : _modelviewStack.back().get();
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}
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inline osg::RefMatrix* CullStack::getProjectionMatrix()
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{
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return _projectionStack.empty() ? _identity.get() : _projectionStack.back().get();
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}
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inline const osg::RefMatrix* CullStack::getProjectionMatrix() const
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{
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return _projectionStack.empty() ? _identity.get() : _projectionStack.back().get();
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}
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inline osg::Matrix CullStack::getWindowMatrix() const
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{
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if (!_viewportStack.empty())
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{
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osg::Viewport* viewport = _viewportStack.back().get();
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return viewport->computeWindowMatrix();
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}
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else
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{
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return *_identity;
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}
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}
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inline const osg::RefMatrix* CullStack::getMVPW()
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{
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if (!_MVPW_Stack.empty())
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{
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if (!_MVPW_Stack.back())
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{
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_MVPW_Stack.back() = createOrReuseMatrix(*getModelViewMatrix());
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(*_MVPW_Stack.back()) *= *(getProjectionMatrix());
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(*_MVPW_Stack.back()) *= getWindowMatrix();
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}
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return _MVPW_Stack.back().get();
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}
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else
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{
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return _identity.get();
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}
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}
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inline RefMatrix* CullStack::createOrReuseMatrix(const osg::Matrix& value)
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{
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// skip of any already reused matrix.
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while (_currentReuseMatrixIndex<_reuseMatrixList.size() &&
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_reuseMatrixList[_currentReuseMatrixIndex]->referenceCount()>1)
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{
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++_currentReuseMatrixIndex;
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}
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// if still within list, element must be singularly referenced
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// there return it to be reused.
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if (_currentReuseMatrixIndex<_reuseMatrixList.size())
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{
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RefMatrix* matrix = _reuseMatrixList[_currentReuseMatrixIndex++].get();
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matrix->set(value);
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return matrix;
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}
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// otherwise need to create new matrix.
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osg::RefMatrix* matrix = new RefMatrix(value);
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_reuseMatrixList.push_back(matrix);
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++_currentReuseMatrixIndex;
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return matrix;
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}
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} // end of namespace
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#endif
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