%!PS-Adobe-1.0
%%Title: knot-paper - part of rpgTools by Elena of Valhalla
%%Pages:1
%%BoundingBox: {{ bounding_box }}
%%DocumentPaperSizes: {{ paper_name }}
%%CreationDate: 2024/04/26
%%DocumentData: Clean7Bit
%%LanguageLevel: 1
%%EndComments
%%BeginProlog
% Copyright (C) 2024 Elena Grandi
% All rights reserved.
%
% Redistribution and use in source and binary forms, with or without
% modification, are permitted provided that the following conditions are met:
%
% * Redistributions of source code must retain the above copyright
%   notice, this list of conditions and the following disclaimer.
% * Redistributions in binary form must reproduce the above copyright
%   notice, this list of conditions and the following disclaimer in the
%   documentation and/or other materials provided with the distribution.
% * Neither the name of the <organization> nor the
%   names of its contributors may be used to endorse or promote products
%   derived from this software without specific prior written permission.
%
% THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
% AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
% IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
% ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE FOR ANY
% DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
% (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
% LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
% ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
% (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
% SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

% ------ Usage ----------------------------------------------------------------
 
% To use this file either send it to a postscript printer, or use your
% favourite postscript interpreter to visualize and print it.
 
% You can customize the result by changing the values in the Settings
% section below (see the comments for details)
 
% ------ sizes ----------------------------------------------------------------
% This will allow you to give measurements in inches or millimiters
% do not change
/inch {72 mul} def
/mm {0.03937 inch mul} def
 
% ------ Settings -------------------------------------------------------------
 
% ------ Basic settings

% page size: if you change this, you should change the BoundingBox
% in line 4 accordingly (you CAN'T use mm or inch over there)
/PageWidth  {{ page_width }} def
/PageHeight {{ page_height }} def

/SquaXLen   {{ x_len }} def           % hor spacing between lines
/SquaYLen   {{ y_len }} def           % ver spacing between lines

/PointXLen  {{ x_point_len }} def     % hor spacing between points
/PointYLen  {{ y_point_len }} def     % ver spacing between points
/OddXTrasl  {{ odd_x_trasl }} def     % hor traslation of points on odd lines

% line width and color for thin lines
/LineSizeThin {{ thin_line_size }} def
/LineColoThin {{ thin_line_color }} def
% line width and color for border
/LineSizeBord {{ border_line_size }} def
/LineColoBord {{ border_line_color }} def
% point size
/PointSize {{ point }} def
/PointLineSize {{ heavy_line_size }} def
/PointLineColo {{ heavy_line_color }} def

/BackColo {{ background_color }} def  % background color

% white margins
/BorderTop {{ margin_top }} def
/BorderBottom {{ margin_bottom }} def
/BorderLeft {{ margin_left }} def
/BorderRight {{ margin_right }} def

% ------ Advanced settings

% translation of the starting point of the pattern
/PattTrasX {{ x_trasl }} def
/PattTrasY {{ y_trasl }} def

% ------ Behaviour
 
% Whether to print a line around the margins (1) or not (0)
/WillPrintBorder {{ 1 if border else 0 }} def
 
% From here on you shouldn't worry about changing or configuring anything
% ------ Variables ------------------------------------------------------------

% number of vert and hor lines
/SquaXNum PageWidth BorderLeft sub BorderRight sub SquaXLen div def
/SquaYNum PageHeight BorderTop sub BorderBottom sub SquaYLen div def

% starting vert and hor line num
/SquaXSta PattTrasX SquaXLen div cvi neg def
/SquaYSta PattTrasY SquaYLen div cvi neg def

% ending vert and hor line num
/SquaXEnd SquaXNum SquaXSta add def
/SquaYEnd SquaYNum SquaYSta add def

% number of vert and hor points
/PointXNum PageWidth BorderLeft sub BorderRight sub PointXLen div def
/PointYNum PageHeight BorderTop sub BorderBottom sub PointYLen div def

% starting vert and hor point num
/PointXSta PattTrasX PointXLen div cvi neg def
/PointYSta PattTrasY PointYLen div cvi neg def

% ending vert and hor line num
/PointXEnd PointXNum PointXSta add def
/PointYEnd PointYNum PointYSta add def

% ------ Procedures -----------------------------------------------------------
 
% Describes the printable area (does NOT print anything)
/UsedArea {
  newpath
  BorderLeft BorderBottom moveto
  BorderLeft PageHeight BorderTop sub lineto
  PageWidth BorderRight sub PageHeight BorderTop sub lineto
  PageWidth BorderRight sub BorderBottom lineto
  closepath
} def

/PrintPoint { %stk: x y
    newpath
        1 index
        1 index
        moveto
        PointSize 0 rmoveto
        PointSize 0 360 arc
    closepath
    PointLineSize setlinewidth
    PointLineColo setrgbcolor
    fill
    stroke
} def

%%EndProlog
%%Page: 1

% set printing area
UsedArea clip
 
% print background
BackColo setrgbcolor
UsedArea fill

% print hor thin line pattern
newpath
  SquaXSta 1 SquaXEnd { %for
    SquaXLen mul BorderLeft add PattTrasX add BorderBottom moveto
    0 PageHeight BorderTop sub BorderBottom sub rlineto
  } for
  LineSizeThin setlinewidth
  LineColoThin setrgbcolor
stroke

% print vert thin line pattern
newpath
  SquaYSta 1 SquaYEnd { %for
    SquaYLen mul BorderBottom add PattTrasY add BorderLeft exch moveto
    PageWidth BorderLeft sub BorderRight sub 0 rlineto
  } for
  LineSizeThin setlinewidth
  LineColoThin setrgbcolor
stroke

% print points
BorderLeft PattTrasX add PointXLen sub % x starting position
PointXLen % step
PageWidth % stop
{ % for
    dup
    BorderBottom PattTrasY add PointYLen sub % y starting position
    PointYLen 2 mul % step
    PageHeight % stop
    { %for
        1 index exch PrintPoint
    } for
    BorderBottom PattTrasY add PointYLen 2 mul sub % y starting position
    PointYLen 2 mul % step
    PageHeight % stop
    { %for
        1 index OddXTrasl add exch PrintPoint
    } for
} for

% print border (if WillPrintBorder is not 0 )
WillPrintBorder 0 ne {
  LineSizeBord setlinewidth
  LineColoBord setrgbcolor
  UsedArea stroke
} if

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