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Re: transparent symbols [message #74973 is a reply to message #74939]

Thu, 10 February 2011 08:55

MarioIncandenza
Messages: 231
Registered: February 2005

Senior Member

On Feb 8, 8:10 am, bing999 <thibaultga...@gmail.com> wrote:
> On Feb 8, 4:48 pm, bing999 <thibaultga...@gmail.com> wrote:
>
>> Hi,
>
>> I want to overplot symbols (filled circles) on a previously drawn
>> figure. To make it easier to read, I would like to make the symbols
>> transparent.
>> Is there a way to do that?
>
>> Thanks a lot!
>
>> cheers
>
> And please note that I would like to save the plot in PostScript... :)

Yes, I should add this is actually a limitation in PostScript itself,
it just can't do (semi-)transparency of vector objects. It can do
transparency of rasters, in a limited way, but that's the same as you
making the plot in PNG with an alpha channel and then converting to
PS.

I see a lot of new graphics packages advertise writing directly in
PDF, and PDF is apparently capable of handling semi-transparent
objects. I see that IDL 8.0 can output to PDF as well, now they just
need to provide support for semi-transparent objects.

Useful and/or interesting information here:
https://secure.wikimedia.org/wikipedia/en/wiki/Transparency_ %28graphic%29

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[Message index]

		Re: transparent symbols By: manodeep@gmail.com on Tue, 08 February 2011 10:43
		Re: transparent symbols By: Michael Galloy on Tue, 08 February 2011 09:18
		Re: transparent symbols By: David Fanning on Tue, 08 February 2011 09:05
		Re: transparent symbols By: R.Bauer on Tue, 08 February 2011 08:52
		Re: transparent symbols By: Thibault Garel on Tue, 08 February 2011 08:10
		Re: transparent symbols By: pgrigis on Thu, 10 February 2011 11:53
		Re: transparent symbols By: MarioIncandenza on Thu, 10 February 2011 08:55

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