public static String3D XStrimextend(String3D XS, String3D XSTinta)
{
String3D XSrezultat = new String3D();
if (XS.Count < 2 || XSTinta.Count < 2)
{
return(XS);
}
for (int i = 0; i < XS.Count; i++)
{
if (i == 0)
{
for (int j = 0; j < XSTinta.Count - 1; j++)
{
Punct3D P = (Punct3D)XSint4P(XS[0], XS[1], XSTinta[j], XSTinta[j + 1]);
if (P.Offset <= XS[1].Offset && P.Offset >= XSTinta[j].Offset && P.Offset <= XSTinta[j + 1].Offset)
{
XSrezultat.Add(P);
}
}
if (XSrezultat.Count == 0)
{
XSrezultat.Add(XS[0]);
}
}
else if (i == XS.Count - 1)
{
for (int j = 0; j < XSTinta.Count - 1; j++)
{
Punct3D P = (Punct3D)XSint4P(XS[XS.Count - 2], XS[XS.Count - 1], XSTinta[j], XSTinta[j + 1]);
if (P.Offset >= XS[XS.Count - 2].Offset && P.Offset >= XSTinta[j].Offset && P.Offset <= XSTinta[j + 1].Offset)
{
XSrezultat.Add(P);
}
}
if (XSrezultat.Count < XS.Count)
{
XSrezultat.Add(XS[XS.Count - 1]);
}
}
else
{
XSrezultat.Add(XS[i]);
}
}
return(XSrezultat);
}
public static String3D XSintersect(String3D S1, String3D S2)
{
String3D S = new String3D();
for (int i = 0; i <= S1.Count - 2; i++)
{
for (int j = 0; j <= S2.Count - 2; j++)
{
Punct3D punct = XSint4P(S1[i], S1[i + 1], S2[j], S2[j + 1]);
if (punct.Offset >= S1[i].Offset && punct.Offset <= S1[i + 1].Offset)
{
S.Add(punct);
}
}
}
if (S.Count > 0)
{
return(S);
}
else
{
return(null);
}
}