disk_3d.inl

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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.
 *  
 *  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.
 *  
 *  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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 *  Copyright (C) 2004-2011 the Initial Developer.
 *  All Rights Reserved.
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 *
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 *  GNU General Public License Version 2 or later (the GPL), in which case the 
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 *  deleting the provisions above and replace them with the notice and other 
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 *  
 *  *** END LICENSE INFORMATION ***
 */
 
 
 
#ifndef LASS_GUARDIAN_OF_INCLUSION_PRIM_DISK_3D_INL
#define LASS_GUARDIAN_OF_INCLUSION_PRIM_DISK_3D_INL
 
 
#include "disk_3d.h"
#include "../num/floating_point_comparison.h"
 
namespace lass
{
namespace prim
{
 
// --- public --------------------------------------------------------------------------------------
 
template <typename T>
Disk3D<T>::Disk3D():
    plane_(),
    radius_(TNumTraits::zero)
{
}
 
 
 
template <typename T>
Disk3D<T>::Disk3D(const TPoint& center, const TVector& normal, TParam radius):
    plane_(normal, center),
    radius_(radius)
{
}
 
 
 
template <typename T>
const typename Disk3D<T>::TPoint&
Disk3D<T>::center() const
{
    return plane_.support();
}
 
 
 
template <typename T>
void Disk3D<T>::setCenter(const TPoint& center)
{
    plane_ = TPlane(plane_.normal(), center);
}
 
 
 
template <typename T>
const typename Disk3D<T>::TVector&
Disk3D<T>::normal() const
{
    return plane_.normal();
}
 
 
 
template <typename T>
void Disk3D<T>::setNormal(const TVector& normal)
{
    plane_ = TPlane(normal, plane_.support());
}
 
 
 
template<typename T>
typename Disk3D<T>::TConstReference
Disk3D<T>::radius() const
{
    return radius_;
}
 
 
 
template<typename T>
typename Disk3D<T>::TReference
Disk3D<T>::radius()
{
    return radius_;
}
 
 
 
/** return area of surface of sphere
 */
template<typename T>
const typename Disk3D<T>::TValue
Disk3D<T>::area() const
{
    return TNumTraits::pi * num::sqr(radius_);
}
 
 
 
/** return area of surface of sphere
 */
template<typename T>
const typename Disk3D<T>::TPlane&
Disk3D<T>::plane() const
{
    return plane_;
}
 
 
 
template <typename T>
const typename Disk3D<T>::TPoint 
Disk3D<T>::point(TParam u, TParam v) const
{
    const TValue theta = 2 * TNumTraits::pi * v;
    return plane_.support() + (u * radius_) * (num::cos(theta) * plane_.directionU() + num::sin(theta) * plane_.directionV());
}
 
 
 
template <typename T> inline
const typename Disk3D<T>::TPoint
Disk3D<T>::point(const TUV& uv) const
{
    return point(uv.x, uv.y);
}
 
 
 
template <typename T>
const typename Disk3D<T>::TUV
Disk3D<T>::uv(const TPoint& point) const
{
    const TVector relative = point - plane_.support();
    const TValue x = dot(relative, plane_.reciprocalU());
    const TValue y = dot(relative, plane_.reciprocalU());
    const TValue u = relative.norm() / radius_;
    TValue v = num::atan2(y, x) / (2 * TNumTraits::pi);
    if (v < 0)
    {
        v += 1;
    }
    return TUV(u, v < 0 ? TNumTraits::one - v : v);
}
 
 
 
/** return true if sphere has a non-negative radius
 */
template <typename T>
bool Disk3D<T>::isValid() const
{
    return plane_.isValid() && radius_ >= TNumTraits::zero;
}
 
 
 
// --- protected -----------------------------------------------------------------------------------
 
 
 
// --- private -------------------------------------------------------------------------------------
 
 
 
// --- free ----------------------------------------------------------------------------------------
 
/** @relates lass::prim::Disk3D
 */
template<typename T>
std::ostream& operator<<(std::ostream& stream, const Disk3D<T>& disk)
{
    LASS_ENFORCE(stream) << "{S=" << disk.center() << ", N=" << disk.normal() << ", r=" << disk.radius() << "}";
    return stream;
}
 
 
 
/** @relates lass::prim::Disk3D
 */
template<typename T>
io::XmlOStream& operator<<(io::XmlOStream& stream, const Disk3D<T>& disk)
{
    LASS_ENFORCE_STREAM(stream)
        << "<Disk3D>\n"
        << "<center>" << disk.center() << "</center>\n"
        << "<normal>" << disk.normal() << "</normal>\n"
        << "<radius>" << disk.radius() << "</radius>\n"
        << "</Disk3D>\n";
 
    return stream;
}
 
 
 
}
 
}
 
#endif
 
// --- END OF FILE ------------------------------------------------------------------------------