public Wire(WireSpot[] spots, WirePart[] parts)
{
// copy the arrays to avoid contamination later on.
Spots = new WireSpot[spots.Length];
Array.Copy(spots, Spots, spots.Length);
Parts = new WirePart[parts.Length];
Array.Copy(parts, Parts, parts.Length);
}
public WirePart(WireSpot a, WireSpot b)
{
A = a;
B = b;
}