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<div class="moz-cite-prefix">Le 04/11/2013 17:01, SCHULZ Wolfgang a
écrit :<br>
</div>
<blockquote
cite="mid:07A8AF089844A549B0F0CCC727AF31AA56EA356A@OVEKBG.ove.at"
type="cite">
<pre wrap="">Hello,
I'm creating contour plots and it would be nice to have certain regions (colors) of a GIF file transparent. </pre>
</blockquote>
By the way, as far as i know, GIF and PNG allow to define only <i>one</i>
transparent color.<br>
So, if you want several regions of distinct colors of the same plot
being transparent,<br>
PNG and GIF would not allow that. I don't know any other common
image formats<br>
able to do that.<br>
If you are looking for transparency of the foreground in order to
see the figure's background<br>
instead of the image's one, tricks given by Christophe and Antoine
will certainly work.<br>
<br>
In the end, you may have a look at <i>help pixel_drawing_mode</i> .
This feature for instance<br>
used to help plotting stacked objects without hidding stacked parts.
<br>
But Scilab 5.4 has killed it :
<a class="moz-txt-link-freetext" href="http://bugzilla.scilab.org/show_bug.cgi?id=12017">http://bugzilla.scilab.org/show_bug.cgi?id=12017</a><br>
<br>
Best regards<br>
Samuel<br>
<br>
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