Version 5.0 The LEDA User Manual

ool
bool
r.project xz(ray& m) if the projection of r into the xz plane is not a point,
the function returns true and assignes the projection
to m. Otherwise false is returned.
r.project yz(ray& m) if the projection of r into the yz plane is not a point,
the function returns true and assignes the projection
to m. Otherwise false is returned.
bool r.project(const d3 point& p, const d3 point& q, const d3 point& v,
d3 ray& m)
if the projection of r into the plane through (p, q, v)
is not a point, the function returns true and assignes
the projection to m. Otherwise false is returned.
d3 ray r.reverse( ) returns a ray starting at r.source() with direction -
r.to vector().
d3 ray r.translate(const vector& v)
returns r translated by vector v. Precond. : v.dim( )
= 3 .
d3 ray
r.translate(double dx, double dy, double dz)
returns r translated by vector (dx, dy, dz).
d3 ray r + const vector& v returns r translated by vector v.
d3 ray r − const vector& v returns r translated by vector −v.
d3 ray r.reflect(const d3 point& p, const d3 point& q, const d3 point& v)
returns r reflected across the plane through (p, q, v).
d3 ray r.reflect(const d3 point& p)
returns r reflected across p.
vector r.to vector( ) returns point2 ( ) − point1 ( ).