floating point numbers Grasshopper rounds to 6 decimal places. These numbers typically support up to 16 decimal places and if there is a tiny difference further down they will register as different numbers.
To test the actual values of your numbers, you can use a Format component with the formatting mask {0:R} (the 'R' stands for Roundtrip, meaning no rounding will be used and the text can be converted back into numbers without any loss of information).
If it turns out the least significant digits do indeed differ, you can round your numbers to N decimal places using an expression:
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David Rutten
david@mcneel.com…
tp://n-e-r-v-o-u-s.com/blog/?p=7465
I used also
http://www.grasshopper3d.com/forum/topics/thicken-a-network-of-line...
in order to thicken the edge differently from the inside.
http://www.grasshopper3d.com/forum/attachment/download?id=2985220%3...…