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Re: ring in fg graphics [message #90641 is a reply to message #90635]

Thu, 19 March 2015 14:01

Helder Marchetto
Messages: 520
Registered: November 2011

Senior Member

Hi Chris,
thanks.
I'm sorry, but I did not express myself properly. And I shouldn't post at midnight. Too tired and I could not think straight.
As far as I'm concerned, the topic is "closed".
For your information, what I was trying to achieve was getting rid of the line that connects inner and outer circle when not filling the background.
[
this is visible in as a vertical connection and can be seen by substituting your last code line with
p = POLYGON(x, y, fill_background=0 , /NORMAL)
]
I think that the only way around this is to use an object that draws two polygons. I've not tested this, but I think that's the way to go.

Thanks, Helder

On Thursday, March 19, 2015 at 6:29:03 PM UTC+1, Chris Torrence wrote:
> On Wednesday, March 18, 2015 at 5:02:15 PM UTC-6, Helder wrote:
>> Hi,
>> is there a way to make a ring in function graphics in a single call?
>> I've tried using polygon with the connectivity keyword without luck. I don't see a way to do this using ellipse.
>> Is this impossible or am I just having a hard time getting the solution?
>>
>> Thanks,
>> Helder
>
> I think we talked about this a couple of weeks ago.
>
> a = findgen(101)/100*2*!PI
> x = 0.5 + [0.3*SIN(a), 0.2*SIN(a)]
> y = 0.5 + [0.3*COS(a), 0.2*COS(a)]
> w = WINDOW()
> p = POLYGON(x, y, FILL_COLOR='red', /NORMAL, LINESTYLE='none')

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[Message index]

		ring in fg graphics By: Helder Marchetto on Wed, 18 March 2015 16:02
		Re: ring in fg graphics By: chris_torrence@NOSPAM on Thu, 19 March 2015 10:29
		Re: ring in fg graphics By: Helder Marchetto on Thu, 19 March 2015 14:01
		Re: ring in fg graphics By: chris_torrence@NOSPAM on Thu, 19 March 2015 14:55

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