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%% shiftoff.mp
%% Copyright 2006 Henrik Tidefelt
%
% This work may be distributed and/or modified under the
% conditions of the LaTeX Project Public License, either version 1.3
% of this license or (at your option) any later version.
% The latest version of this license is in
% http://www.latex-project.org/lppl.txt
% and version 1.3 or later is part of all distributions of LaTeX
% version 2005/12/01 or later.
%
% This work has the LPPL maintenance status `maintained´.
%
% The Current Maintainer of this work is Henrik Tidefelt,
% tidefelt@isy.liu.se.
%
% This work, referred to as blockdraw.mp, consists of the files
% shiftoff.mp
% blockdraw.mp
% bondgraph.mp
% blockdraw_mp.pdf
numeric to_lft;
to_lft = 0;
numeric to_llft;
to_llft = 1;
numeric to_bot;
to_bot = 2;
numeric to_lrt;
to_lrt = 3;
numeric to_rt;
to_rt = 4;
numeric to_urt;
to_urt = 5;
numeric to_top;
to_top = 6;
numeric to_ulft;
to_ulft = 7;
numeric to_center;
to_center = 8;
def to_dir(expr z ) =
if (xpart z) > 0:
if (ypart z) > 0:
if abs(xpart z) > 2*abs(ypart z):
to_rt
elseif abs(ypart z) > 2*abs(xpart z):
to_top
else:
to_urt
fi
else:
if abs(xpart z) > 2*abs(ypart z):
to_rt
elseif abs(ypart z) > 2*abs(xpart z):
to_bot
else:
to_lrt
fi
fi
else:
if (ypart z) > 0:
if abs(xpart z) > 2*abs(ypart z):
to_lft
elseif abs(ypart z) > 2*abs(xpart z):
to_top
else:
to_ulft
fi
else:
if abs(xpart z) > 2*abs(ypart z):
to_lft
elseif abs(ypart z) > 2*abs(xpart z):
to_bot
else:
to_llft
fi
fi
fi
enddef;
def dir_to(expr d ) =
dir( 180 + d * 45 )
enddef;
def shiftoff(expr pic, corner ) =
if corner = to_lft:
(pic shifted ((-center pic)+((xpart llcorner pic)-(xpart center pic),0)))
elseif corner = to_llft:
(pic shifted ((-center pic)+(llcorner pic)-(center pic)))
elseif corner = to_bot:
(pic shifted ((-center pic)+(0,(ypart llcorner pic)-(ypart center pic))))
elseif corner = to_lrt:
(pic shifted ((-center pic)+(lrcorner pic)-(center pic)))
elseif corner = to_rt:
(pic shifted ((-center pic)+((xpart lrcorner pic)-(xpart center pic),0)))
elseif corner = to_urt:
(pic shifted ((-center pic)+(urcorner pic)-(center pic)))
elseif corner = to_top:
(pic shifted ((-center pic)+(0,(ypart ulcorner pic)-(ypart center pic))))
elseif corner = to_ulft:
(pic shifted ((-center pic)+(ulcorner pic)-(center pic)))
else:
(pic shifted (-center pic))
fi
enddef;
numeric shiftofflabelmargin;
shiftofflabelmargin := bboxmargin;
def shiftoffwlm(expr pic, corner ) =
if corner = to_lft:
(pic shifted ((-center pic)+((xpart llcorner pic)-(xpart center pic),0)+(-shiftofflabelmargin,0)))
elseif corner = to_llft:
(pic shifted ((-center pic)+(llcorner pic)-(center pic)+(-shiftofflabelmargin,-shiftofflabelmargin)))
elseif corner = to_bot:
(pic shifted ((-center pic)+(0,(ypart llcorner pic)-(ypart center pic))+(0,-shiftofflabelmargin)))
elseif corner = to_lrt:
(pic shifted ((-center pic)+(lrcorner pic)-(center pic)+(shiftofflabelmargin,-shiftofflabelmargin)))
elseif corner = to_rt:
(pic shifted ((-center pic)+((xpart lrcorner pic)-(xpart center pic),0)+(shiftofflabelmargin,0)))
elseif corner = to_urt:
(pic shifted ((-center pic)+(urcorner pic)-(center pic)+(shiftofflabelmargin,shiftofflabelmargin)))
elseif corner = to_top:
(pic shifted ((-center pic)+(0,(ypart ulcorner pic)-(ypart center pic))+(0,shiftofflabelmargin)))
elseif corner = to_ulft:
(pic shifted ((-center pic)+(ulcorner pic)-(center pic)+(-shiftofflabelmargin,shiftofflabelmargin)))
else:
(pic shifted (-center pic))
fi
enddef;
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