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MathGroup Archive 2001

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Re: sinosidal circle equation

  • To: mathgroup at smc.vnet.net
  • Subject: [mg29911] Re: sinosidal circle equation
  • From: "Orestis Vantzos" <atelesforos at hotmail.com>
  • Date: Wed, 18 Jul 2001 02:08:52 -0400 (EDT)
  • Organization: National Technical University of Athens, Greece
  • References: <9iomai$i0l$1@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

ParametricPlot[(R1 + R2 Sin[(L/2) t]^2){Cos[t], Sin[t]}, {t, 0, 2Pi}]
will produce a "wavy circle" with inner radius R1, outer radius R2 and L
"leaves".
Orestis

"Dr. Jasjit Suri" <jsuri at mr.marconimed.com> wrote in message
news:9iomai$i0l$1 at smc.vnet.net...
> Hi,
>
> I generated a flower image like this:
>     d = sqrt((x0-x)^2 + (y-y0)^2)
>     r = Constant*[cos(angle)]^2......................imp.
>     if (d <= r) { HIGH value} else{LOW value}
>
> this gives me a flower image.
>
> i would like to generate a smooth sine wave pattern
> around the circle..... The wavy circle should go in and out..
>
> Is there a std. equation of this curve  ?
>
> thanks.
> jas
>
>
>
>




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