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 || | |