MathGroup Archive 2005

[Date Index] [Thread Index] [Author Index]

Search the Archive

Re: gradient in ParametricPlot

  • To: mathgroup at smc.vnet.net
  • Subject: [mg59401] Re: gradient in ParametricPlot
  • From: "Jens-Peer Kuska" <kuska at informatik.uni-leipzig.de>
  • Date: Mon, 8 Aug 2005 06:17:04 -0400 (EDT)
  • Organization: Uni Leipzig
  • References: <dd4f7f$hr8$1@smc.vnet.net> <dd72ai$3h9$1@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

Sorry the colors with ParametricPlot3D[] work fien 
but I had forgotten to
unload RealTime3D`

Regards
  Jens

"Jens-Peer Kuska" 
<kuska at informatik.uni-leipzig.de> schrieb im 
Newsbeitrag news:dd72ai$3h9$1 at smc.vnet.net...
| Hi,
|
| what gradient ? A parametric curve  has a 
tangent
| vector, a normal
| and a bi-normal but no gradient
|
| BTW the colors for 3d lines seems to be broken 
in
| Mathematica 5.1
| but MathGL3d will show you the colors  from a
| gg = ParametricPlot3D[{Sin[t], Cos[t], Sin[2t],
| RGBColor[t/(2Pi), 1 - t, 1]}, {t, 0, 2Pi}]
|
| call. You may also force to convert the
| Graphics3D[] into a
|
| Graphics[] with
|
| Show[Graphics[gg]]
|
| and you get the colors back.
|
|
| Regards
|  Jens
| "Daniele Lupo"
| <danwolf80_no_spam_please_ at libero.it> schrieb im
| Newsbeitrag news:dd4f7f$hr8$1 at smc.vnet.net...
|| Hi.
||
|| I'd like to plot a ParametricPlot graphic 
image.
| It's easy, but I'd like
|| also to color the curve obtained according to a
| gradient (Hue, for
|| example), so the line changes color according
| the parameter value. In this
|| case if the coordinates are {t Sin[t], t 
Cos[t]}
| the point at t=value will
|| be colored as Hue[value]. There's a way to do
| this, instead to have a line
|| with a costant color defined by StylePlot?
||
|| I've obtained this in a ParametricPlot3D, using
||
| 
{x[u,v],y[u,v],z[u,v],{SurfaceColor[Hue[f[u,v]]]}}
| (thanks to Davin Park
|| example in a my previous post about ellipsoid),
| but this does not works in
|| 2D case (there's no surfaces...)
||
|| Thanks for answers
||
|| Daniele
||
|
| 



  • Prev by Date: Re: Re: coefficient of a polynomial term
  • Next by Date: Re: running notebook from command line...
  • Previous by thread: Re: gradient in ParametricPlot
  • Next by thread: Re: gradient in ParametricPlot