k3d/share/shaders/k3d_brushedmetal3.sl:11: *   xdir - a unit tangent of the surface which defines the reference
k3d/share/shaders/k3d_brushedmetal3.sl:13: *   xroughness - the apparent roughness of the surface in xdir.
k3d/share/shaders/k3d_brushedmetal3.sl:15: *          tangent which is perpendicular to xdir.
k3d/share/shaders/k3d_brushedmetal3.sl:19:                         vector xdir;  float xroughness, yroughness;)
k3d/share/shaders/k3d_brushedmetal3.sl:24:    vector X = xdir / xroughness;
k3d/share/shaders/k3d_brushedmetal3.sl:25:    vector Y = (N ^ xdir) / yroughness;
k3d/share/shaders/k3d_brushedmetal3.sl:58:    vector xdir = normalize (dPdu);
k3d/share/shaders/k3d_brushedmetal3.sl:61:                                          xdir, uroughness, vroughness);
k3d/share/shaders/k3d_skin1.sl:25: * xdir, angle = control the direction of the specular highlights.
k3d/share/shaders/k3d_skin1.sl:62:                         vector xdir;  float xroughness, yroughness;)
k3d/share/shaders/k3d_skin1.sl:67:    vector X = xdir / xroughness;
k3d/share/shaders/k3d_skin1.sl:68:    vector Y = (N ^ xdir) / yroughness;
k3d/share/shaders/k3d_skin1.sl:182:  varying vector xdir = dPdu;
k3d/share/shaders/k3d_skin1.sl:277:  vector anisoDir = xdir;
