hit.inl

Go to the documentation of this file.

/*
    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
void Hit::ExtractIntersection(const Ray &ray,
                              sheep::Point3 *point,
                              sheep::Vector3 *geometric_normal,
                              sheep::Vector3 *shading_normal) const
{
    // Compute world space intersection point.
    if(point) {
        *point = ray.GetPointAt(m_abscissa);
    }

    // Compute world space geometric normal.
    if(geometric_normal) {
        const sheep::Vector3 gn = m_object->TransformNormalToWorld(m_geometric_normal);
        assert(gn.IsUnitLength());
        *geometric_normal = (ray.m_direction * gn > 0.0) ? -gn : gn;
    }

    // Compute world space shading normal.
    if(shading_normal) {
        const sheep::Vector3 sn = m_object->TransformNormalToWorld(m_shading_normal);
        assert(sn.IsUnitLength());
        *shading_normal = (ray.m_direction * sn > 0.0) ? -sn : sn;
    }
}

---