/// <summary>
/// overrides the <see cref="ProjectPoint(xyz)"/> method of <see cref="Surface"/>.
/// </summary>
/// <param name="Point">Point, wich will be projected th the surface</param>
/// <returns>u amd v parameter. A call <b>Point</b></returns>
public override xy ProjectPoint(xyz Point)
{
xyz p = Base.Relativ(Point);
xyz PD = new xyz(0, 0, 0);
xyz PU = new xyz(0, 0, 0);
double Lam = -1;
double Param = -1;
DownPlane.Cross(new LineType(p, Direction), out Lam, out PD);
UpPlane.Cross(new LineType(p, Direction), out Lam, out PU);
xyzArray A = CurveArray;
xyz R = StandardBase.Relativ(p);
double u = Curve.Arcus(new xy(R.X, R.y));
xy PP11 = Curve.Value(u);
if (PP11.dist(new xy(R.X, R.Y)) > 0.5)
{
}
else
{
}
A.Distance(new LineType(p, Direction), 1e10, out Param, out Lam);
if (Height < 0)
{
double v = p.dist(PD) / PU.dist(PD);
xyz PP = Value(u, v);
return(new xy(u, v));
}
else
{
xy pt = Curve.Value(u);
xyz K = StandardBase.BaseX * pt.x + StandardBase.BaseY * pt.y;
Plane P = new Plane(Base.BaseO, Base.BaseZ);
LineType L = new LineType(K, Direction);
xyz pkt = new xyz(0, 0, 0);
P.Cross(L, out Lam, out pkt);
double v = pkt.dist(p) / Height;
xyz PP1 = Value(u, v);
return(new xy(u, v));
}
}
/// <summary>
/// overrides the <see cref="Value(double, double)"/> method of a <see cref="Surface"/>.
/// </summary>
/// <param name="u">first u-parameter</param>
/// <param name="v">second v-parameter</param>
/// <returns>coordinate of the extruded object</returns>
public override xyz Value(double u, double v)
{
double Lam = -1;
xyz Q = new xyz(0, 0, 0);
xy P = Curve.Value(u);
xyz K = StandardBase.BaseO + StandardBase.BaseX * P.x + StandardBase.BaseY * P.y;
if (Height < 0)
{
xyz Pkt = new xyz(0, 0, 0);
xyz Pkt2 = new xyz(0, 0, 0);
DownPlane.Cross(new LineType(K, Direction), out Lam, out Pkt);
UpPlane.Cross(new LineType(K, Direction), out Lam, out Pkt2);
xyz N = Base.Absolut(Pkt + (Pkt2 - Pkt) * v);
if (ZHeight(u, v) > 0)
{
return(Base.Absolut(Pkt + (Pkt2 - Pkt) * v + Normal(u, v) * ZHeight(u, v)));
}
else
{
return(Base.Absolut(Pkt + (Pkt2 - Pkt) * v));
}
}
else
{
LineType L = new LineType(K, Direction);
Plane PL = new Plane(Base.BaseO, Base.BaseZ);
Q = new xyz(0, 0, 0);
PL.Cross(L, out Lam, out Q);
if (ZHeight(u, v) > 0)
{
return(Q + Direction.normalized() * (Height * v) + Normal(u, v) * ZHeight(u, v));
}
else
{
return(Q + Direction.normalized() * (Height * v));
}
}
}
