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Re: Manipulate / Space Phasor

  • To: mathgroup at smc.vnet.net
  • Subject: [mg92341] Re: Manipulate / Space Phasor
  • From: magma <maderri2 at gmail.com>
  • Date: Sat, 27 Sep 2008 22:23:55 -0400 (EDT)
  • References: <gbl2ve$lvl$1@smc.vnet.net>

With the following code you can display a line from the origin to the
curve endpoint.
If you want to add an arrow head, you need to "forge" it yourself, as
there is no cone primitive AFAIK.

Manipulate[
 Show[ParametricPlot3D[{Sin[u], Cos[u], u/10}, {u, 0, t}],
  Graphics3D[Line[{{0, 0, 0}, {Sin[t], Cos[t], t/10}}]]], {t, 1, 20}]

Arrow3D functionality is available with Presentations, a high quality
50$ package by David Park available at

http://home.comcast.net/~djmpark/DrawGraphicsPage.html

HTH



On Sep 27, 12:47 pm, Fabian <fabian.uria... at gmail.com> wrote:
> Dear Group-
>
> In this plot:
>
> Manipulate[
>  ParametricPlot3D[{Sin[u], Cos[u], u/10}, {u, 0, t}], {t, 1, 20}]
>
> Is there a way a to show an Arrow from the origin to the tip of the
> curve at all instances of time t?
>
> Thank you.



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