bounding_alignedbox_box.h

// Description: Bounding aligned box of a box

#ifndef PASTELGEOMETRY_BOUNDING_ALIGNEDBOX_BOX_H
#define PASTELGEOMETRY_BOUNDING_ALIGNEDBOX_BOX_H

#include "pastel/geometry/shape/alignedbox.h"
#include "pastel/geometry/shape/box.h"

namespace Pastel
{

    //! Bounding aligned box of an oriented box.
    template <typename Real, int N>
    AlignedBox<Real, N> boundingAlignedBox(
        const Box<Real, N>& box)
    {
        // An oriented box is an affine 
        // transformation of an aligned box.
        // You can find the derivation in
        // 'bounding_alignedbox_alignedbox.h'.

        Vector<Real, N> radius =
            box.width() * abs(box.rotation());

        AlignedBox<Real, N> result(
            box.position() - radius, box.position() + radius);

        return result;
    }

}

#endif