Thanks Bas, I was having trouble last night with a small hull model when the waterline was really low... It was sectioning the hull just fine, but it wasn't producing a boolean diff. I could make a large plane at that height and it would boolean diff OK. I think we may need to change the way it slices the hull.
Also, to figure the cleanest/easiest way to get waterline length and width, based off of that first section. There are many ways, but I found myself having to pick through Item List numbers a couple times. Maybe use a Min/Max? I'll try to clean it up some tonight. Your link didn't work for some reason: http://grasshopper3d.googlegroups.com/web/Hull+displacement+Volume+rev+6.ghx?hl=en&gda=DmIS81QAAAC19Ve3i4OoV9kZmG4Q4msc1NYgDRPxxfT173epdF1m0vBYzyJnKZ7c9rcHPgp9WDmLT5I1V9Pb-4c0eQ9kmagyVervUohE3YNENn3wMh1Pnc3OAWZC50hVl-fZ6-QcRqg
