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Re: a polygon version of polyline.. [message #41134 is a reply to message #41131]

Wed, 29 September 2004 16:54

Mark Hadfield
Messages: 783
Registered: May 1995

Senior Member

George Millward wrote:
> Hi there,
>
> I have a 3D object program which plots magnetic field lines (in 3D
> space) as polylines. This is fine - but I would like to change it so
> that they are coloured 'tubes' - polylines with a certain circular
> cross section and a 'shiny' finish. The look I am after is the one
> you often see with magnetic field topologies (Solar magnetic fields
> models etc.)
>
> Simple question is: does anyone know how to do this - or could they
> point me to a ready-made procedure.

Cool! I'm afraid you might have to write your own. The MESH_OBJ routine
does "cylinders" and "extrusions", but only straight ones, I think. A
bendy tube will have the same connectivity as a straight one, but you're
going to have to warp those vertex positions--ouch! MESH_OBJ is written
in IDL so you may get some ideas from the source code.

--
Mark Hadfield "Ka puwaha te tai nei, Hoea tatou"
m.hadfield@niwa.co.nz
National Institute for Water and Atmospheric Research (NIWA)

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[Message index]

		Re: a polygon version of polyline.. By: george on Fri, 01 October 2004 08:56
		Re: a polygon version of polyline.. By: Rick Towler on Thu, 30 September 2004 16:22
		Re: a polygon version of polyline.. By: george on Thu, 30 September 2004 09:15
		Re: a polygon version of polyline.. By: Rick Towler on Wed, 29 September 2004 17:21
		Re: a polygon version of polyline.. By: Mark Hadfield on Wed, 29 September 2004 16:54
		Re: a polygon version of polyline.. By: Randall Skelton on Sat, 02 October 2004 11:55
		Re: a polygon version of polyline.. By: rdsheu on Thu, 07 October 2004 20:50

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