2012-03-22 01:36:20 +08:00
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/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield
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2007-02-17 01:34:34 +08:00
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*
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2012-03-22 01:36:20 +08:00
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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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2007-02-17 01:34:34 +08:00
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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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2012-03-22 01:36:20 +08:00
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*
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2007-02-17 01:34:34 +08:00
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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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2012-03-22 01:36:20 +08:00
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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2007-02-17 01:34:34 +08:00
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* OpenSceneGraph Public License for more details.
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*/
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#ifndef OSG_COMPUTEBOUNDSVISITOR
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#define OSG_COMPUTEBOUNDSVISITOR 1
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#include <osg/NodeVisitor>
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#include <osg/BoundingBox>
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#include <osg/Polytope>
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namespace osg {
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class OSG_EXPORT ComputeBoundsVisitor : public osg::NodeVisitor
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{
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public:
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ComputeBoundsVisitor(TraversalMode traversalMode = TRAVERSE_ALL_CHILDREN);
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2012-03-22 01:36:20 +08:00
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2013-01-25 02:48:34 +08:00
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META_NodeVisitor(osg, ComputeBoundsVisitor)
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2008-12-17 20:13:15 +08:00
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2007-02-17 01:34:34 +08:00
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virtual void reset();
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2012-03-22 01:36:20 +08:00
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2007-02-17 01:34:34 +08:00
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osg::BoundingBox& getBoundingBox() { return _bb; }
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void getPolytope(osg::Polytope& polytope, float margin=0.1) const;
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2012-03-22 01:36:20 +08:00
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2007-02-17 01:34:34 +08:00
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void getBase(osg::Polytope& polytope, float margin=0.1) const;
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2012-03-22 01:36:20 +08:00
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2014-07-29 00:19:44 +08:00
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void apply(osg::Drawable& drawable);
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2012-03-22 01:36:20 +08:00
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2007-02-17 01:34:34 +08:00
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void apply(osg::Transform& transform);
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2012-03-22 01:36:20 +08:00
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2007-02-17 01:34:34 +08:00
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inline void pushMatrix(osg::Matrix& matrix) { _matrixStack.push_back(matrix); }
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2012-03-22 01:36:20 +08:00
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2007-02-17 01:34:34 +08:00
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inline void popMatrix() { _matrixStack.pop_back(); }
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2012-03-22 01:36:20 +08:00
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From Kristofer Tingdahl,"we have a bunch of classes that inherit osg::Node, and they create their own, internal geometry which is passed into the render bucket at the cull-traversal. Last week, we realised that these classes are not accounted for when doing an ComputeBoundVisitor- traversal, as there is no specialization in ComputeBoundVisitor for them.
One solution is naturally to create a new class that would inherit the osg::ComputeBoundVisitor, and use that. I don't like that idea as the ComputeBoundVisitor does actually have what I need - it is only hidden in a protected function.
I am therefor suggesting a slight generalization of the ComputeBoundVisitor with the attached patch, which is tested.
The patch has two parts:
we add applyBBox() so that one can use that in a customized traverse-function and add a bbox to the visitor. I considered calling this function expandByBBox(), but I though applyBBox was better.
The MatrixStack is made available to the outside world. That enables a traverse-function to do whatever it wishes.
I do actually only need one of the two, as I can implement what I wish either way, but adding getMatrixStack() will make more generic expansions possible.
"
From Robert Osfield, changed the name of the new applyBBox(..) method to applyBoundingBox(..) to keep it's naming more consistent with the rest of the OSG.
2014-01-24 00:48:29 +08:00
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void applyBoundingBox(const osg::BoundingBox&);
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2012-03-22 01:36:20 +08:00
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2007-02-17 01:34:34 +08:00
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typedef std::vector<osg::Matrix> MatrixStack;
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From Kristofer Tingdahl,"we have a bunch of classes that inherit osg::Node, and they create their own, internal geometry which is passed into the render bucket at the cull-traversal. Last week, we realised that these classes are not accounted for when doing an ComputeBoundVisitor- traversal, as there is no specialization in ComputeBoundVisitor for them.
One solution is naturally to create a new class that would inherit the osg::ComputeBoundVisitor, and use that. I don't like that idea as the ComputeBoundVisitor does actually have what I need - it is only hidden in a protected function.
I am therefor suggesting a slight generalization of the ComputeBoundVisitor with the attached patch, which is tested.
The patch has two parts:
we add applyBBox() so that one can use that in a customized traverse-function and add a bbox to the visitor. I considered calling this function expandByBBox(), but I though applyBBox was better.
The MatrixStack is made available to the outside world. That enables a traverse-function to do whatever it wishes.
I do actually only need one of the two, as I can implement what I wish either way, but adding getMatrixStack() will make more generic expansions possible.
"
From Robert Osfield, changed the name of the new applyBBox(..) method to applyBoundingBox(..) to keep it's naming more consistent with the rest of the OSG.
2014-01-24 00:48:29 +08:00
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const MatrixStack& getMatrixStack() const { return _matrixStack; }
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protected:
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2007-02-17 01:34:34 +08:00
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MatrixStack _matrixStack;
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osg::BoundingBox _bb;
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};
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}
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#endif
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