help: vector field describing the trajectory of water drops on an irregular surface

Replies to This Discussion

Permalink Reply by David Rutten on December 8, 2012 at 3:57pm

Define vector field. Are you looking for a bunch of vectors or to actually write your own Field type?

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David Rutten

david@mcneel.com

Poprad, Slovakia

Permalink Reply by Andrei Raducanu on December 8, 2012 at 3:59pm

the second one

Permalink Reply by David Rutten on December 8, 2012 at 4:01pm

See attached for a cheeky way of doing it.

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David Rutten

david@mcneel.com

Poprad, Slovakia

Attachments:

• Downhill.gh, 20 KB

Permalink Reply by Andrei Raducanu on December 8, 2012 at 4:03pm

too bag gh 0.9.0015 isn't available yet :)

nevermind, still works, although some errors appeard.

that's funny, it's pretty much what i did, but i projected the lowered points onto the tangent frame (rather than the actual surface) in order to get tangents.

still, this isn 't exactly what i meant, i was hoping to create a vector field data entity

Permalink Reply by David Rutten on December 8, 2012 at 4:23pm

That is a bit weird then. Fields in GH are fully 3D, whereas the water flow is a 2D property. What should the vector field be like when you sample off the surface?

Still, it is possible -though not trivial- to define your own fields, see attached.

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David Rutten

david@mcneel.com

Poprad, Slovakia

Attachments:

• DownhillField.gh, 13 KB

Permalink Reply by Andrei Raducanu on December 8, 2012 at 4:31pm

thanks a lot for taking the time to write that script!

i'll struggle to decrypt its logic 'though i'm not too familiar to VB

Permalink Reply by David Rutten on December 8, 2012 at 4:05pm

And here's the correct way.

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David Rutten

david@mcneel.com

Poprad, Slovakia

Attachments:

• Downhill.gh, 26 KB

Permalink Reply by Andrei Raducanu on December 8, 2012 at 4:12pm

sorry, i edited the previous reply when  i saw it does indeed work.

this second version does the same as my version, buy goes differently about it

is there a way to make an actual vector field variable, or it's not the kind of thing these can be used for?