Camera(vector3 p, vector3 d, vector3 u) {
position = p;
direction = d.normalized();
up = u.normalized();
up = (u - direction.projected(u)).normalized();
right = (direction ^ up).normalized();
}
///
/// \brief ray
/// \param _start
/// \param _dir
///
ray_t(const vector3<REAL> _start, const vector3<REAL> _dir){
start = _start; dir = _dir.normalized();
}
plane<Real>::plane(const vector3<Real> &p, const vector3<Real> &n) :
normal(n.normalized())
{
d = - dot(p, normal);
}
