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## Copyright (c) P.J.Gawthrop, 1996.
## %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
## %% Version control history
## %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
## %% $Id$
## %% $Log$
## %% Revision 1.12 2000/09/14 08:07:00 peterg
## %% Reformated as an Octave function
## %%
## %% Revision 1.11 2000/01/18 14:52:02 peterg
## %% Removed recursion --- maybe put back via a flag later
## %%
## %% Revision 1.10 1998/12/14 15:27:32 peterg
## %% Added separate handling of ports ( poss zero)
## %%
## %% Revision 1.9 1998/08/25 06:43:02 peterg
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distance_2 = length2d(other_end_2 - arrow_end);
which_end = (distance_1>distance_2)*[1 1];
one = ones(size(which_end));
other_end = which_end.*other_end_1 + (one-which_end).*other_end_2;
arrow_barb = which_end.*other_end_2 + (one-which_end).*other_end_1;
arrow_vector = arrow_barb-arrow_end;
unit_arrow_vector = arrow_vector./(length2d(arrow_vector)*[1 1]);
bond_vector = (arrow_end - other_end);
unit_bond_vector = bond_vector./(length2d(bond_vector)*[1 1]);
unit_stroke_vector = (rot*unit_bond_vector')';
## Extract directional information
arrow_end_direction = [rbonds(:,7), rbonds(:,8)];
other_end_direction = [rbonds(:,9), rbonds(:,10)];
## Get indices of bonds with changed causality -- but ignore the extra bonds
## due to vector bond expansion
changed_e = bonds(1:n_bonds,1)~=cbonds(1:n_bonds,1);
changed_f = bonds(1:n_bonds,2)~=cbonds(1:n_bonds,2);
changed = changed_e|changed_f;
## Don't do port bonds
#if n_ports>0
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index_ef = getindex(changed,1)';
## Print the new strokes in fig format
if index_ef(1,1)>0
for i = index_e # Do the effort stroke - opp. side to arrow
if cbonds(i,1)==1 # Stroke at arrow end
bond_vector = arrow_end_direction(i,:); # Directional vector
stroke_end_1 = arrow_end(i,:);
else
bond_vector = other_end_direction(i,:); # Directional vector
stroke_end_1 = other_end(i,:);
end;
sig = sign(unit_arrow_vector(i,:)*unit_stroke_vector(i,:)');
stroke_end_2 = stroke_end_1 - stroke_length*sig*unit_stroke_vector(i,:);
sig = sign(unit_arrow_vector(i,:)*unit_stroke_vector(i,:)');
stroke_end_2 = stroke_end_1 + stroke_length*sig*unit_stroke_vector(i,:);
sig = sign(unit_arrow_vector(i,:)*unit_stroke_vector');
stroke_end_2 = stroke_end_1 + stroke_length*sig*unit_stroke_vector;
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