Hatching Background

[Abe Gillespie]

I will definitely send you some samples.  It'll be later today / tonight though.

Thanks.
-Abe

On 12/7/05, Steve Lime <steve.lime at dnr.state.mn.us> wrote:
> Abe: Could you post some samples? I'd like to see what 'ugly' means. Also,
> have you tried setting TRANSPARENCY ALPHA on the layer being hatched?
>
> Steve
>
> >>> Abe Gillespie <abe.gillespie at GMAIL.COM> 12/06/05 8:29 PM >>>
> I've got a symbol that does diagonal hatching.  This symbol is used to
> do custom selecting outside MapServer's normal selection facilities (I
> believe the custom selection is common for Chameleon apps).  This
> symbol is defined as such:
>
> Symbol
> Name 'left slash'
> Type VECTOR
> TRANSPARENT 0
> Points
> 0 0
> 1 1
> END
> END
>
> And this symbol is applied on the fly with the following code:
>
> $o_style = ms_newStyleObj($class);
> $o_style->color->setRGB(255, 0, 0);
> $o_style->outlinecolor->setRGB(0, 255, 0);
> $o_style->set("symbol", 10);
>
> This style object comes from a class object from a shapefile that is
> dynamically created and added to the map and includes the shapes that
> are currently selected.
>
> The problem:
> When the output mode of the image is set to "RGB" the hatch's
> background is transparent and lets the map below show through the gaps
> in the hatch.  But this means all the aerial photos are UGLY.
> However, when I set the image mode to "RGBA", the aerial photos are
> beautiful, but the gaps in the hatch are solidly filled with white and
> don't let the beautiful aerial photography (or anything else for that
> matter) show through.
>
> Any ideas?
>
> Thanks.
> -Abe
>
>