[Geotools-devel] Rendering lines with a Graphic Stroke

[Jesse E. <je...@re...>]

I have a bit of a issue with lines drawn with a Graphic stroke.  I've 
looked at the SLD specification on how it is supposed to be done and I 
haven't really gotten a good answer but here is what it does and what I 
think it should do:

What it does:
Between each set of coordinates the graphic is drawn.  If the distance 
between the two coordinates is longer than the graphic then the graphic 
is repeated until the space if filled up.  So far this is more or less 
ok.  However if the distance between coordinates is less than the length 
of the graphic then the graphic is clipped so that it fits.  Because of 
this when you zoom out the graphic is unrecognizable.  Image a line with 
an arrow.  If you zoom in the arrow can be seen with no difficulty but 
if you zoom out it looks like a line (the arrow is lost).

What I expected:
I expected the arrow to show up independent of what zoom level I am at.  
A weather map is a good point.  I have weather front with arrows 
indicating the direction they are moving.  The direction the arrow 
points is dependent on the order of the coordinates so a graphic stoke 
would work perfectly... Unfortunately if I look at all of canada it just 
looks like a line.  I  have to zoom in to see the arrows.  This is not 
what is desired. 

I am going to make a new implementation of StyledShapePainter for my use 
in this project.  And can add it to geotools if it is the behaviour that 
other expect as well.  However if there is a better way to do what I 
want please let me know before I do too much work.

Thanks,
Jesse