[mapserver-users] Polygon Outline Color Width Fade Howto?
Stephen Woodbridge
woodbri at swoodbridge.com
Fri Apr 11 20:15:58 PDT 2008
Thanks Joe,
Yeah, I eventually figured that out. I tried to use a circle gradient,
but the circle overlaps at the start/end of the polygon making it darker
there. You also have to render the polygon first as as a LINE to get the
brush applied then again as a polygon to get the fill. You might be able
to do it in one step, but I have not been able to get that to work.
I'm still playing with this to get the effect I want.
-Steve
Joe Bussell wrote:
> Can you use an image as a line brush, where the image is a gradient from
> a dark point at the center to a light, nearly transparent shade?
>
> Joe
>
>
> On Fri, Apr 11, 2008 at 3:11 PM, Stephen Woodbridge
> <woodbri at swoodbridge.com <mailto:woodbri at swoodbridge.com>> wrote:
>
> Hi all,
>
> I want to render and island polygon with a big fat outline color in
> a dark blue the fades in distance from the island. I'm using AGG and
> I tried this:
>
> LAYER
> NAME "Islands"
> STATUS DEFAULT
> DATA "coast"
> TYPE POLYGON
> LABELITEM "ISLAND"
> LABELCACHE OFF
> CLASS
> STYLE
> SYMBOL "circle"
> OUTLINECOLOR 0 192 243
> SIZE 20
> END
> STYLE
> COLOR 242 239 233
> END
> END
> END
>
> Which sort of works but there is very little fade.
>
> If I use:
>
> STYLE
> OUTLINECOLOR 0 192 243
> WIDTH 20
> END
>
> I get horrible artifacts all along the outline. Is there a way to
> control the amount of fade in the outline. Can I make a transparent
> ball that fades with radius to achieve this?
>
> Thanks,
> -Steve
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