basis.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
*/

//! Vector v is expressed in local space, returned vector is expressed in world space.
inline
sheep::Vector3 Basis::TransformToWorld(const sheep::Vector3 &v) const {
    return m_m * v;
}

//! Point p is expressed in local space, returned point is expressed in world space.
inline
sheep::Point3 Basis::TransformToWorld(const sheep::Point3 &v) const {
    return m_m * v;
}

//! Vector v is expressed in world space, returned vector is expressed in local space.
inline
sheep::Vector3 Basis::TransformToLocal(const sheep::Vector3 &v) const {
    return m_inv_m * v;
}

//! Point p is expressed in world space, returned point is expressed in local space.
inline
sheep::Point3 Basis::TransformToLocal(const sheep::Point3 &v) const {
    return m_inv_m * v;
}

//! Ray r is expressed in local space, returned ray is expressed in world space.
//! Direction vector of the returned ray MAY NOT be unit-length.
inline
Ray Basis::TransformToWorld(const Ray &r) const {
    return Ray(r.GetType(), m_m * r.m_origin, m_m * r.m_direction);
}

//! Ray r is expressed in world space, returned ray is expressed in local space.
//! Direction vector of the returned ray MAY NOT be unit-length.
inline
Ray Basis::TransformToLocal(const Ray &r) const {
    return Ray(r.GetType(), m_inv_m * r.m_origin, m_inv_m * r.m_direction);
}

//! Normal n is expressed in local space, returned normal is expressed in world space.
//! The returned vector IS unit-length.
inline
sheep::Vector3 Basis::TransformNormalToWorld(const sheep::Vector3 &n) const {
    return (m_tr_inv_m * n).Normalized();
}

//! Normal n is expressed in world space, returned normal is expressed in local space.
//! The returned vector IS unit-length.
inline
sheep::Vector3 Basis::TransformNormalToLocal(const sheep::Vector3 &n) const {
    return (m_tr_m * n).Normalized();
}

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