ComputeBoundsVisitor.h

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/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield
 *
 * This library is open source and may be redistributed and/or modified under
 * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
 * (at your option) any later version.  The full license is in LICENSE file
 * included with this distribution, and on the openscenegraph.org website.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * OpenSceneGraph Public License for more details.
*/

#ifndef OSG_COMPUTEBOUNDSVISITOR
#define OSG_COMPUTEBOUNDSVISITOR 1

#include <osg/NodeVisitor>
#include <osg/BoundingBox>
#include <osg/Polytope>

namespace osg {

class OSG_EXPORT ComputeBoundsVisitor : public osg::NodeVisitor
{
public:

    ComputeBoundsVisitor(TraversalMode traversalMode = TRAVERSE_ALL_CHILDREN);

    META_NodeVisitor(osg, ComputeBoundsVisitor)

    virtual void reset();

    osg::BoundingBox& getBoundingBox() { return _bb; }

    void getPolytope(osg::Polytope& polytope, float margin=0.1) const;

    void getBase(osg::Polytope& polytope, float margin=0.1) const;

    void apply(osg::Drawable& drawable);

    void apply(osg::Transform& transform);

    inline void pushMatrix(osg::Matrix& matrix) { _matrixStack.push_back(matrix); }

    inline void popMatrix() { _matrixStack.pop_back(); }


    void applyBoundingBox(const osg::BoundingBox&);

    typedef std::vector<osg::Matrix> MatrixStack;

    const MatrixStack& getMatrixStack() const { return _matrixStack; }

protected:
    MatrixStack         _matrixStack;
    osg::BoundingBox    _bb;
};

}

#endif