Re: Colour Gradients

["w robertson cairnwater co uk" <w robertson cairnwater co uk>]

Hi Michael,

Thanks very much - I'm not sure if using Postscript 3 would help since we'd
like to stick to Dia's own .dia format and the files would be used online
rather than printed.

I don't think Dia can read and edit Postscript 3 files but I might be wrong
in that.

(The diagrams would be exported as PNG at the very last stage to go online
and changes to the diagrams - which are likely - would be done on .dia
files then the PNG files regenerated from that. In future we may use SVG to
put the images online but browser support is limiting that so we're
planning to play safe and use PNG for now.) 

Will

Original Message:
-----------------
From: Michael Hennebry hennebry web cs ndsu nodak edu
Date: Fri, 6 Nov 2009 14:12:18 -0600 (CST)
To: dia-list gnome org, w robertson cairnwater co uk
Subject: Re: Colour Gradients


On Fri, 6 Nov 2009, Steffen Macke wrote:

> > The only work-around I've been able to find is to do the area of colour
> > gradient as a bitmap in GNU Image Manipulation Program then use the
bitmap
> > in a Dia diagram. I've looked through the recent dia-list Archives but
not
> Is there any problem with this approach? If you need specific shapes,
have you
> thought about masking a rectangular colour gradient created in GIMP
> with a "white" polygon?

It does have a bit of kludginess to it.
Postscript 3 does shading.
Does that help?

> > I noticed that the "PC Video" shape on the "Cisco - Computer" sheet has a
> > sort of colour gradient as part of it which seems ot work fairly well
> > (although this gradient doesn't scale up so well).
>
> It just contains many different subshapes with different shades of gray.

-- 
Michael   hennebry web cs ndsu NoDak edu
"Pessimist: The glass is half empty.
Optimist:   The glass is half full.
Engineer:   The glass is twice as big as it needs to be."


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