boxtools.h

// Description: Algorithms for Box's

#ifndef PASTELGEOMETRY_BOX_TOOLS_H
#define PASTELGEOMETRY_BOX_TOOLS_H

#include "pastel/geometry/shape/box.h"
#include "pastel/math/affine/affine_transformation.h"

namespace Pastel
{

    //! Transforma an box by the given transformation.
    /*!
   The matrix part of the transformation must be
   special orthogonal, otherwise the assumptions
   of the Box are broken down and some geometric
   algorithms work incorrectly.
   */
    template <typename Real, int N>
    Box<Real, N>& operator*=(Box<Real, N>& box,
        const AffineTransformation<Real>& rigidTransform)
    {
        box.setPosition(box.position() * rigidTransform);
        box.setRotation(box.rotation() * rigidTransform);

        return box;
    }

    //! Returns an box transformed by the given transformation.
    /*!
   The matrix part of the transformation must be
   special orthogonal, otherwise the assumptions
   of the Box are broken down and some geometric
   algorithms work incorrectly.
   */
    template <typename Real, int N>
    Box<Real, N> operator*(const Box<Real, N>& box,
        const AffineTransformation<Real>& rigidTransform)
    {
        return Box<Real, N>(
            box.position() * rigidTransform,
            box.width(),
            box.rotation() * rigidTransform);
    }

}

#endif