Re: A question about location of points on a circle
- To: mathgroup at smc.vnet.net
- Subject: [mg106934] Re: A question about location of points on a circle
- From: Szabolcs Horvát <szhorvat at gmail.com>
- Date: Fri, 29 Jan 2010 07:44:09 -0500 (EST)
- References: <hjrf7s$n06$1@smc.vnet.net>
On 2010.01.28. 8:43, Marwa Abd El-Wahaab wrote:
> Dear Sir,
>
> I am a Mathematica 7 user.
>
> I have a question :
>
> How can I locate points on the circumference of a circle by using
> "Graphics"?
>
> I use in drawing the circle:
>
> Graphics[Circle[{0,0},r]]
>
I'm not sure I understand what you are asking for. Is this it?
DynamicModule[{pt = {1, 0}},
Graphics[{Circle[], Locator[Dynamic[pt, (pt = Normalize[#]) &]]},
PlotRange -> 2]]
This is copied directly from
http://reference.wolfram.com/mathematica/ref/Locator.html#ES_4
under "Applications".