Re: Re: Re: How to set linewidth in 3-D graphics?

*To*: mathgroup at smc.vnet.net*Subject*: [mg50098] Re: [mg50090] Re: [mg50016] Re: How to set linewidth in 3-D graphics?*From*: "David Park" <djmp at earthlink.net>*Date*: Sun, 15 Aug 2004 03:14:24 -0400 (EDT)*Sender*: owner-wri-mathgroup at wolfram.com

I don't know if this bears directly on the question but ParametricPlot3D and ParametricPlot work by quite different algorithms. Plotting a curve in ParametricPlot3D is rather a degenerate case of plotting a surface. Look at the different primitives in the two cases. plot1 = ParametricPlot[{Cos[t], Sin[t]}, {t, 0, 2Pi}, DisplayFunction -> Identity]; First[plot1] You get a single line with adaptive points. plot2 = ParametricPlot3D[{Cos[t], Sin[t], t}, {t, 0, 2Pi}, DisplayFunction -> Identity]; First[plot2] You get multiple Lines with nonadaptive points. I think it would have made more sense to use PlotStyle instead of putting the plot directives as the fourth argument in the parametrization. But having decided to do it that way they just abandoned PlotStyle or never considered it in the first place. David Park djmp at earthlink.net http://home.earthlink.net/~djmp/ From: Murray Eisenberg [mailto:murray at math.umass.edu] To: mathgroup at smc.vnet.net Yes, your code works -- and an interesting graphical treatment, too! But it is not unreasonable to expect, say ParametricPlot3D[{Cos[phi], Sin[phi], phi}, {phi, 0, 2Pi}, PlotStyle -> Thickness[0.01]] to work, since the 2D analog ParametricPlot[{Sin[t], Cos[t]}, {t, 0, Pi}, PlotStyle -> Thickness[0.01]] does work as expected. Jens-Peer Kuska wrote: > Hi, > > it is not possible ? realy ? and what does > > ParametricPlot3D[ > {Cos[phi], Sin[phi], phi, Thickness[0.1phi/(2Pi)]}, {phi, 0, 2Pi}] > > Regards > Jens > > ffdfsdfsdfsdfsd wrote: > >>On 2 May 1997 03:07:54 -0400, Yaroslaw Bazaliy wrote: >> >>>Dear All: >>>I plot a curve in 3-D with "ParametricPlot3-D". I would like to >>>be able to change the thickness of the curve. Is it possible? >>>I 2-D the option PlotStyle did it... >>>Thanks for all suggestions. >>>Yaroslaw. >> >>No > > > -- Murray Eisenberg murray at math.umass.edu Mathematics & Statistics Dept. Lederle Graduate Research Tower phone 413 549-1020 (H) University of Massachusetts 413 545-2859 (W) 710 North Pleasant Street fax 413 545-1801 Amherst, MA 01003-9305