Zero length curve extending - Grasshopper - McNeel Forum

How is this curve extending?, trying to mimic the grasshopper script in a C# script, I get the same two lines one with length and the other with 0.00 length but in the grasshopper script it extends unlike the C# script, my mind will explode on how is this curve extending and how did it decide the vector for extension

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Zero length curve extending - Grasshopper - McNeel Forum

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