aabb_3d_plane_3d.h

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/** @file
 *  @author Bram de Greve (bram@cocamware.com)
 *  @author Tom De Muer (tom@cocamware.com)
 *
 *  *** BEGIN LICENSE INFORMATION ***
 *  
 *  The contents of this file are subject to the Common Public Attribution License 
 *  Version 1.0 (the "License"); you may not use this file except in compliance with 
 *  the License. You may obtain a copy of the License at 
 *  http://lass.sourceforge.net/cpal-license. The License is based on the 
 *  Mozilla Public License Version 1.1 but Sections 14 and 15 have been added to cover 
 *  use of software over a computer network and provide for limited attribution for 
 *  the Original Developer. In addition, Exhibit A has been modified to be consistent 
 *  with Exhibit B.
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 *  Software distributed under the License is distributed on an "AS IS" basis, WITHOUT 
 *  WARRANTY OF ANY KIND, either express or implied. See the License for the specific 
 *  language governing rights and limitations under the License.
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 *  The Original Code is LASS - Library of Assembled Shared Sources.
 *  
 *  The Initial Developer of the Original Code is Bram de Greve and Tom De Muer.
 *  The Original Developer is the Initial Developer.
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#ifndef LASS_GUARDIAN_OF_INCLUSION_PRIM_AABB_3D_PLANE_3D_H
#define LASS_GUARDIAN_OF_INCLUSION_PRIM_AABB_3D_PLANE_3D_H
 
#include "prim_common.h"
#include "aabb_3d.h"
#include "plane_3d.h"
 
namespace lass
{
namespace prim
{
 
/*  @relates lass::prim::Plane3D
 *  @sa lass::prim::Aabb3D
 */
template <typename T, typename EP, typename NP, typename MMP>
bool intersects(const Plane3D<T, EP, NP>& plane, const Aabb3D<T, MMP>& box)
{
    typedef typename Plane3D<T, EP, NP>::TVector TVector;
    typedef typename Plane3D<T, EP, NP>::TValue TValue;
 
    TVector a = box.min().position();
    TVector b = box.max().position();
    TVector n;
    TValue d;
    plane.getCartesian(n, d);
 
    for (size_t k = 0; k < 3; ++k)
    {
        if (n[k] < 0)
        {
            std::swap(a[k], b[k]);
        }
    }
 
    return prim::dot(n, a) + d <= 0 && prim::dot(n, b) + d >= 0;
}
 
 
}
}
 
#endif
 
// EOF