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Date:Mon Mar 19 16:53:14 2000 
Subject:rc_pic_lines 
From:Daniel J Birks 
Volume-ID:1000319.01 

Hi all,
I'm currently using rc-lib to display agents within my final year project,
when I attempt to set the properties of rc_pic_lines on the fly (in a
simulation run) ie:

if see_target_flag = 1 then
    [COLOUR 'black' WIDTH 1 [CIRCLE {0 0 1}] ] -> agent.rc_pic_lines;
else
    [COLOUR ^t_id WIDTH 1 [CIRCLE {0 0 1}] ] -> agent.rc_pic_lines;
endif;

I get a little blob left at the point at which the colour changed...
these marks can be removed using rc_redraw_window_object, but as these
changes occur often I need to continually redraw the screen which just
slows down the whole thing to a 'flickery' halt - expesicially when I have
a large no. of agents...
therefore I was wondering if anyone was aware of a better method of
removing them....

cheers for reading......
Dan