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% --------------------------------------------------------------------------
%
% the CHEMMACROS package -- module: `newman'
%
% --------------------------------------------------------------------------
% Clemens Niederberger
% --------------------------------------------------------------------------
% https://github.org/cgnieder/chemmacros/
% contact@mychemistry.eu
% --------------------------------------------------------------------------
% If you have any ideas, questions, suggestions or bugs to report, please
% feel free to contact me.
% --------------------------------------------------------------------------
% Copyright 2011-2016 Clemens Niederberger
%
% 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 Clemens Niederberger.
% --------------------------------------------------------------------------
\ChemModule{newman}{2016/04/23 newman projections}
\chemmacros_load_module:n {tikz}
% Newman projections
\fp_new:N \l__chemmacros_newman_rel_angle_fp
\fp_zero:N \l__chemmacros_newman_rel_angle_fp
\fp_new:N \l__chemmacros_newman_tmp_angle_fp
\fp_new:N \l__chemmacros_newman_abs_angle_fp
\fp_zero:N \l__chemmacros_newman_abs_angle_fp
\fp_new:N \l__chemmacros_newman_scale_fp
\fp_set:Nn \l__chemmacros_newman_scale_fp {1}
\fp_new:N \l__chemmacros_newman_x_fp
\fp_new:N \l__chemmacros_newman_y_fp
\tl_new:N \l__chemmacros_newman_tikz_ring_tl
\tl_new:N \l__chemmacros_newman_tikz_front_tl
\tl_new:N \l__chemmacros_newman_tikz_back_tl
\bool_new:N \l__chemmacros_newman_tikz_back_bool
\chemmacros_define_keys:nn {newman}
{
ring .tl_set:N = \l__chemmacros_newman_tikz_ring_tl ,
atoms .tl_set:N = \l__chemmacros_newman_tikz_front_tl ,
back-atoms .code:n =
{
\bool_set_true:N \l__chemmacros_newman_tikz_back_bool
\tl_set:Nn \l__chemmacros_newman_tikz_back_tl { #1 }
} ,
scale .fp_set:N = \l__chemmacros_newman_scale_fp ,
scale .default:n = 1 ,
angle .fp_set:N = \l__chemmacros_newman_abs_angle_fp ,
angle .default:n = 0
}
% \newman[<keyval>](<angle>){<1>,<2>,<3>,<4>,<5>,<6>}
\NewDocumentCommand \newman {od()m}
{
\group_begin:
\IfNoValueF {#1} { \chemmacros_set_keys:nn {newman} {#1} }
\IfNoValueTF {#2}
{ \chemmacros_newman:nn { } {#3} }
{ \chemmacros_newman:nn {#2} {#3} }
\group_end:
}
% #1: angle
% #2: csv list of atoms
\cs_new_protected:Npn \chemmacros_newman:nn #1#2
{ \__chemmacros_newman_feed_atoms:nw {#1}#2 ,,,,,, \q_stop }
\cs_new_protected:Npn \__chemmacros_newman_feed_atoms:nw #1#2,#3,#4,#5,#6,#7,#8 \q_stop
{ \chemmacros_newman_atoms:nnnnnnn {#1} {#2} {#3} {#4} {#5} {#6} {#7} }
% place atoms:
% #1: angle
% #2 - #7: atoms
\cs_new_protected:Npn \chemmacros_newman_atoms:nnnnnnn #1#2#3#4#5#6#7
{
\tl_if_blank:nTF {#1}
{
\fp_set_eq:NN
\l__chemmacros_newman_rel_angle_fp
\l__chemmacros_newman_abs_angle_fp
}
{ \fp_set:Nn \l__chemmacros_newman_rel_angle_fp {#1} }
\chemmacros_tikz_picture:xn
{
scale = \fp_to_decimal:N \l__chemmacros_newman_scale_fp ,
chemmacros_newman_atom_front / .style =
{
inner~sep = 0pt ,
outer~sep = 0pt ,
\exp_not:V \l__chemmacros_newman_tikz_front_tl
},
chemmacros_newman_atom_back / .style =
{
inner~sep = 0pt ,
outer~sep = 0pt ,
\bool_if:NTF \l__chemmacros_newman_tikz_back_bool
{ \exp_not:V \l__chemmacros_newman_tikz_back_tl }
{ \exp_not:V \l__chemmacros_newman_tikz_front_tl }
}
}
{
\chemmacros_tikz_draw:x
{ \exp_not:V \l__chemmacros_newman_tikz_ring_tl }
(0pt,0pt) circle (\fp_to_dim:N \l__chemmacros_newman_scale_fp * 15) ;
\chemmacros_newman_back_node:nn {30} {#6}
\chemmacros_newman_back_node:nn {150} {#7}
\chemmacros_newman_back_node:nn {270} {#5}
\chemmacros_newman_front_node:nn {90} {#2}
\chemmacros_newman_front_node:nn {210} {#3}
\chemmacros_newman_front_node:nn {330} {#4}
}
}
% provide cartesian coordiantes from polar coordinates
% #1: fp variable for x
% #2: fp variable for y
% #3: angle
% #4: radius
\cs_new_protected:Npn \chemmacros_polar_to_cartesian:NNnn #1#2#3#4
{
\fp_set:Nn #1 { #4 * cos( #3 / 180 * pi ) }% x
\fp_set:Nn #2 { #4 * sin( #3 / 180 * pi ) }% y
}
% place back nodes
\cs_new_protected:Npn \chemmacros_newman_back_node:nn #1#2
{
\group_begin:
\fp_add:Nn \l__chemmacros_newman_rel_angle_fp { #1 }
\chemmacros_polar_to_cartesian:NNnn
\l__chemmacros_newman_x_fp
\l__chemmacros_newman_y_fp
{ \l__chemmacros_newman_rel_angle_fp }
{ \l__chemmacros_newman_scale_fp }
\chemmacros_tikz_draw:x
{ \exp_not:V \l__chemmacros_newman_tikz_ring_tl }
(
15 * \fp_to_dim:N \l__chemmacros_newman_x_fp ,
15 * \fp_to_dim:N \l__chemmacros_newman_y_fp
)
--
(
30 * \fp_to_dim:N \l__chemmacros_newman_x_fp ,
30 * \fp_to_dim:N \l__chemmacros_newman_y_fp
) ;
\chemmacros_polar_to_cartesian:NNnn
\l__chemmacros_newman_x_fp
\l__chemmacros_newman_y_fp
{ \l__chemmacros_newman_rel_angle_fp }
{ \l__chemmacros_newman_scale_fp }
\chemmacros_tikz_node:x
{
chemmacros_newman_atom_back,
anchor = -180 + \fp_to_int:N \l__chemmacros_newman_rel_angle_fp
}
at
(
31 * \fp_to_dim:N \l__chemmacros_newman_x_fp ,
31 * \fp_to_dim:N \l__chemmacros_newman_y_fp
)
{ #2 } ;
\group_end:
}
\cs_generate_variant:Nn \chemmacros_newman_back_node:nn { nf }
% place front nodes:
\cs_new_protected:Npn \chemmacros_newman_front_node:nn #1#2
{
\chemmacros_polar_to_cartesian:NNnn
\l__chemmacros_newman_x_fp
\l__chemmacros_newman_y_fp
{ #1 }
{ \l__chemmacros_newman_scale_fp }
\chemmacros_tikz_draw:x
{ \exp_not:V \l__chemmacros_newman_tikz_ring_tl }
(0pt,0pt) -- ++
(
30 * \fp_to_dim:N \l__chemmacros_newman_x_fp ,
30 * \fp_to_dim:N \l__chemmacros_newman_y_fp
) ;
\chemmacros_polar_to_cartesian:NNnn
\l__chemmacros_newman_x_fp
\l__chemmacros_newman_y_fp
{ #1 }
{ \l__chemmacros_newman_scale_fp }
\chemmacros_tikz_node:x
{ chemmacros_newman_atom_front, anchor = -180 + #1 }
at
(
31 * \fp_to_dim:N \l__chemmacros_newman_x_fp ,
31 * \fp_to_dim:N \l__chemmacros_newman_y_fp
)
{ #2 } ;
}
\cs_generate_variant:Nn \chemmacros_newman_front_node:nn { nf }
% --------------------------------------------------------------------------
\tex_endinput:D
2016/04/23 - some changes on how \newman is processed internally
|
