surfacebasis.inl

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/*
    toxic - A Global Illumination Renderer
    Copyright (C) 2003-2004 Francois Beaune
    Contact: http://toxicengine.sourceforge.net/

    This file is part of toxic.

    toxic is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    toxic 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
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with toxic; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/

inline
SurfaceBasis::SurfaceBasis(const sheep::Vector3 &normal) :
    m_y(normal)
{
    sheep::build_basis(m_y, &m_z, &m_x);
}

inline
const sheep::Vector3 &SurfaceBasis::GetNormal() const {
    return m_y;
}

inline
sheep::Vector3 SurfaceBasis::TransformToWorld(const sheep::Vector3 &v) const {
    return
        v.m_x * m_x +
        v.m_y * m_y +
        v.m_z * m_z;
}

inline
sheep::Vector3 SurfaceBasis::TransformToLocal(const sheep::Vector3 &v) const {
    return sheep::Vector3(
        v * m_x,
        v * m_y,
        v * m_z);
}

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