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%!PS-Adobe-3.0 EPSF-3.0
%%BoundingBox: 0 0 595.27545 841.88956

% Business Card : 0 0 252.283405 144.566895
% A6            : 0 0 297.637725 420.9447825
% A5            : 0 0 420.9447825 595.27545
% A4            : 0 0 595.27545 841.889565
% A3            : 0 0 841.889565 1190.5509
% A2            : 0 0 1190.5509 1683.77913
% A1            : 0 0 1683.77913 2381.1018


/s 28.34645 def

s s scale

/linethickness 0.05 def
/period 0.15 def
/drawwidth 21 def
/drawheight 29.7 def

drawheight drawwidth gt {drawheight} {drawwidth} ifelse

2 exp 2 mul sqrt ceiling cvi

/width exch def
/height width def

/lines height period div ceiling cvi def
/pi 3.14159 def

% Support functions

/unrealrand {
	(%Calendar%) currentdevparams dup
	/Second get exch dup
	/Minute get exch 
	/Hour get
	60 mul add
	60 mul add
	realtime add srand
} def

unrealrand % add our new seed

/smallrand { rand 2147483647 div 2 mul 1 sub abs } def
/randrotate { smallrand 360 mul smallrand 6 mul mul } def
/randpattern { patterns smallrand patterns length 1 sub mul round cvi get } def

/box {
    0 0 moveto
    exch dup 0 rlineto
    exch 0 exch rlineto
    neg 0 rlineto
} bind def

/drawpattern {
    linethickness setlinewidth 

    gsave
        randrotate rotate
        %0 rotate        
        width 2 div neg lines period mul 2 div neg translate
        patterns randpattern exec

        %patterns patterns 7 get exec
    grestore
    
} bind def

/patterns [
    % 0: Simply lines
    {
        lines {
		    0 0 moveto
		    0 period translate
		    width 0 rlineto
		    stroke
	    } repeat
    }

    % 1: 10 Sinus waves
    { 10 sinuswave exec }
    
    % 2: 8 Sinus waves
    { 8 sinuswave exec }
    
    % 3: 6 Sinus waves
    { 6 sinuswave exec }
    
    % 4: 5 Sinus waves
    { 5 sinuswave exec }
    
    % 5: 3 Sinus waves
    { 3 sinuswave exec }
    
    % 6: 1 Sinus wave
    { 1 sinuswave exec }

    % 7: Big curve
    { 20 curve exec }

    % 8: Medium curve
    { 15 curve exec }

    % 9: Small curve
    { 10 curve exec }

    % 10: Inv big curve
    { 20 neg curve exec }

    % 11: Inv medium curve
    { 15 neg curve exec }

    % 12: Inv small curve
    { 10 neg curve exec }
    
    % 13: 8 Sharkteeth
    { 8 5 sharkteeth exec }

    % 14: 6 Sharkteeth
    { 6 8 sharkteeth exec }

    % 15: 4 Sharkteeth
    { 4 11 sharkteeth exec }

    % 16: 3 Sharkteeth
    { 3 14 sharkteeth exec }

    % 17: 2 Sharkteeth
    { 2 17 sharkteeth exec }

    % 19: 1 Sharkteeth
    { 1 20 sharkteeth exec }
] def % end patterns

/basepatterns [
    % begin sinus wave
    { 
        % How many curves do we need to draw
        /curves exch def
        % Figure out how wide they need to be
        /cw width curves div ceiling def
        % Define the half of that width
        /cwh cw 2 div def
        
        % If we only draw a small amount of curves a
        % big part of the drawing is not covered.
        % Therefor we're going to draw extra lines
        % And need extra translation.
        
        % gap is curvewidth / (2pi) = .5 curvewidth / pi = cwh pi div
        % fill lines is gap period div ceiling cvi
        % filllinestop = filllinesbottom = gap period div 2 div ceiling cvi

        /gap cw pi div def
        /extralines gap period div ceiling cvi def

        % And perform extra translation
        0 gap 2 div neg translate 

        lines extralines add{
		    gsave
			    curves {
				    0 0 moveto
				    cwh cwh cwh cwh neg cw 0 curveto
				    cw 0 translate
			    } repeat
				
                stroke
		    grestore

		    0 period translate
	    } repeat
    }
       
    % Draws a curve width given height,
    % height defined as a percentage of the width
    {
        /h exch 100 div width mul def % Height of the curve
        /c width 2 div def % Define center of curve
 
        /gap h def
        /extralines gap abs period div ceiling cvi def

        0 gap neg translate

        lines extralines add {
            0 0 moveto
            c h c h width 0 curveto stroke
            0 period translate

        } repeat
    }
    
    % Draws sharkteeth. As defined by
    % points and height
    {
        /h exch 100 div height mul ceiling cvi def % Height of the points
        /p exch def % Amount of points
        /pw width p div ceiling cvi def
        /pwh pw 2 div def
       
        /extralines h period div ceiling cvi def
    
        0 h neg translate

        lines extralines add{          
            gsave
                0 0 moveto
                p {
                    pwh h rlineto 
                    pwh h neg rlineto 
                    pw 0 translate                 
                } repeat
                stroke
            grestore
            0 period translate
        } repeat
    }
] def % end base patterns

/sinuswave  basepatterns 0 get def
/curve      basepatterns 1 get def
/sharkteeth basepatterns 2 get def

gsave
    newpath
    0 0 moveto
    drawwidth 11 div 0 rlineto
    0 drawheight rlineto
    drawwidth 11 div neg 0 rlineto
    closepath
    clip
    newpath
        drawwidth 2 div drawheight 2 div translate
        unrealrand
        drawpattern
        unrealrand
        drawpattern
    closepath
grestore

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