[Therion] Redefining PENA...PEND to draw lighter

[Bruce]

Thanks for asking that question Michael
I have the same problem, but I had not bothered to think about changing the
linework colour.

I just tried a simpler approach (that leaves the header and grid coordinates
black).  I will use this from now on.

   symbol-colour group all [60] #makes everything grey
   colour map-fg [97 86 38] #add some colour

And check out this code to make the grid grey
http://therion.speleo.sk/wiki/doku.php/metapost?s[]=change&s[]=grid&s[]=symb
ols#special_symbol_examples 
Code to change grid symbols from cross hairs to continuous lines

Thanks
Bruce
(I don't know how to change the pen colours)


-----Original Message-----
From: therion-bounces at speleo.sk [mailto:therion-bounces at speleo.sk] On Behalf
Of Michael Wasmund
Sent: Tuesday, 19 May 2015 12:00 p.m.
To: therion at speleo.sk
Subject: [Therion] Redefining PENA...PEND to draw lighter


Hello,
Does someone have metapost code to redefine PENA...PEND to draw grey instead
of black?

Why I need this:

My survey consists of 80% scanned bitmaps and 20% drawn scraps.
The bitmaps are "grey", not black (can't make them better using image
processing).
 The drawn scraps then stand out and look ugly compared to the bitmaps.

I know how to redefine individual symbols (walls etc.) to be grey instead of
black,
but rather than redefining a large symbol set I'd rather redefine the PENs -
if possible. 

Regards,
Michael.

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