| Re: overcome postscript transparency ? [message #40608] |
Mon, 23 August 2004 04:47 |
Haje Korth
Messages: 651
Registered: May 1997
|
Senior Member |
|
|
Klemens,
AFAIK, transparency is only possible in Level 3 format and IDL does not
support it. I ran into this problem when trying to bring some alpha blended
objects to paper. Result: NOT POSSIBLE!
Cheers,
Haje
"Klemens Barfus" <klemens.barfus@forst.tu-dresden.de> wrote in message
news:2otkkhFdsdjoU1@uni-berlin.de...
> Hello David,
> there seems to be the possibility for transparency in postscript plots.
> Googling I found something called the alpha transparency described for
> example in
> www.tinaja.com/glib/alphadem.pdf
> The question is now: is there keyword in IDL to change these
> transparency ? Or do I have to change / can I change the transparency in
> the postscript file, when I open it with the text editor ?
> Searching for the word alpha in the postscript file, I have not found it.
> - by the way: I use IDL Version 5.2.1 -
>
> Thanks for your help !
>
> Klemens
>
>
> David Fanning wrote:
>> Klemens Barfus writes:
>>
>>
>>> is there any chance to overcome the transparency of postscript plots.
>>> Making a 3 dimensional plot, the post script output looks bad becauce of
>>> the transparency of the -poly- filled areas. But I do not know in
>>> advance, which areas have to be plotted because they can be seen in the
>>> completed plot. Otherwise, the same plot in tif format looks bad even if
>>> I scale up the window to 2400 x 2400 pixel, espacially the font, but the
>>> lines, too.
>>> -working with direct graphics-
>>> Any suggestions ?
>>
>>
>> As far as I know, there is no "transparency" in PostScript
>> output. If you are having problems with this, it is
>> probably due to the order in which things are being
>> drawn. Can we see some code? A picture of a plot?
>> Something that might give us a clue?
>>
>> Cheers,
>>
>> David
>>
>
|
|
|
|
| Re: overcome postscript transparency ? [message #40610 is a reply to message #40608] |
Mon, 23 August 2004 00:26  |
Klemens Barfus
Messages: 45
Registered: December 2002
|
Member |
|
|
Hello David,
there seems to be the possibility for transparency in postscript plots.
Googling I found something called the alpha transparency described for
example in
www.tinaja.com/glib/alphadem.pdf
The question is now: is there keyword in IDL to change these
transparency ? Or do I have to change / can I change the transparency in
the postscript file, when I open it with the text editor ?
Searching for the word alpha in the postscript file, I have not found it.
- by the way: I use IDL Version 5.2.1 -
Thanks for your help !
Klemens
David Fanning wrote:
> Klemens Barfus writes:
>
>
>> is there any chance to overcome the transparency of postscript plots.
>> Making a 3 dimensional plot, the post script output looks bad becauce of
>> the transparency of the -poly- filled areas. But I do not know in
>> advance, which areas have to be plotted because they can be seen in the
>> completed plot. Otherwise, the same plot in tif format looks bad even if
>> I scale up the window to 2400 x 2400 pixel, espacially the font, but the
>> lines, too.
>> -working with direct graphics-
>> Any suggestions ?
>
>
> As far as I know, there is no "transparency" in PostScript
> output. If you are having problems with this, it is
> probably due to the order in which things are being
> drawn. Can we see some code? A picture of a plot?
> Something that might give us a clue?
>
> Cheers,
>
> David
>
|
|
|
|
| Re: overcome postscript transparency ? [message #40614 is a reply to message #40610] |
Sat, 21 August 2004 07:19 |
David Fanning
Messages: 11724
Registered: August 2001
|
Senior Member |
|
|
Klemens Barfus writes:
> is there any chance to overcome the transparency of postscript plots.
> Making a 3 dimensional plot, the post script output looks bad becauce of
> the transparency of the -poly- filled areas. But I do not know in
> advance, which areas have to be plotted because they can be seen in the
> completed plot. Otherwise, the same plot in tif format looks bad even if
> I scale up the window to 2400 x 2400 pixel, espacially the font, but the
> lines, too.
> -working with direct graphics-
> Any suggestions ?
As far as I know, there is no "transparency" in PostScript
output. If you are having problems with this, it is
probably due to the order in which things are being
drawn. Can we see some code? A picture of a plot?
Something that might give us a clue?
Cheers,
David
--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.dfanning.com/
|
|
|
|
comp.lang.idl-pvwave archive
Members
Search
Help
Login
Home
