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  % This avoids gaps due to rounding errors:

  clip

  pathbbox           %leave llx,lly,urx,ury on stack

  /y ED /x ED

  2 copy translate

  y sub neg /y ED

  x sub neg /x ED

  % This avoids gaps due to rounding errors:

  LastRed FirstRed add 2 div

  LastGreen FirstGreen add 2 div

  LastBlue FirstBlue add 2 div

  setrgbcolor

  fill

  /YSizePerLine y NumLines div def

  /CurrentY 0 def

  /MidLine NumLines 1 MidPoint sub mul abs cvi def

  MidLine NumLines 2 sub gt

  { /MidLine NumLines def }

  { MidLine 2 lt { /MidLine 0 def } if }

  ifelse

  MidLine 0 gt

  {

    /Red FirstRed def

    /Green FirstGreen def

    /Blue FirstBlue def

    /RedIncrement LastRed FirstRed sub MidLine 1 sub div def

    /GreenIncrement LastGreen FirstGreen sub MidLine 1 sub div def

    /BlueIncrement LastBlue FirstBlue sub MidLine 1 sub div def

    MidLine { GradientLoop } repeat

  } if

  MidLine NumLines lt

  {

    /Red LastRed def

    /Green LastGreen def

    /Blue LastBlue def

    /RedIncrement FirstRed LastRed sub NumLines MidLine sub 1 sub div def

    /GreenIncrement FirstGreen LastGreen sub NumLines MidLine sub 1 sub div def

    /BlueIncrement FirstBlue LastBlue sub NumLines MidLine sub 1 sub div def

    NumLines MidLine sub { GradientLoop } repeat

  } if

} def

/GradientLoop {

  0 CurrentY moveto

  x 0 rlineto

  0 YSizePerLine rlineto

  x neg 0 rlineto

  closepath

  Red Green Blue setrgbcolor fill

  /CurrentY CurrentY YSizePerLine add def

  /Blue Blue BlueIncrement add def

  /Green Green GreenIncrement add def

  /Red Red RedIncrement add def

} def

end

% END pst-grad.pro

%%EndProcSet

%%BeginProcSet: pst-coil.pro

% PostScript prologue for pst-coil.tex.

% Version 97, 93/03/12.

% For copying restrictions, see pstricks.tex.

%

/tx@CoilDict 40 dict def tx@CoilDict begin

/CoilLoop { /t ED t sin AspectSin mul t 180 div AspectCos mul add t cos

lineto } def

/Coil { /Inc ED dup sin /AspectSin ED cos /AspectCos ED /ArmB ED /ArmA ED

/h ED /w ED /y1 ED /x1 ED /y0 ED /x0 ED x0 y0 translate y1 y0 sub x1 x0

sub 2 copy Pyth /TotalLength ED Atan rotate /BeginAngle ArmA AspectCos

Div w h mul Div 360 mul def /EndAngle TotalLength ArmB sub AspectCos Div

w h mul Div 360 mul def 1 0 0 0 ArrowA ArmA 0 lineto /mtrx CM def w h

mul 2 Div w 2 Div scale BeginAngle Inc EndAngle { CoilLoop } for

EndAngle CoilLoop mtrx setmatrix TotalLength ArmB sub 0 lineto CP

TotalLength 0 ArrowB lineto } def

/AltCoil { /Inc ED dup sin /AspectSin ED cos /AspectCos ED /h ED /w ED

/EndAngle ED /BeginAngle ED /mtrx CM def w h mul 2 Div w 2 Div scale

BeginAngle sin AspectSin mul BeginAngle 180 div AspectCos mul add

BeginAngle cos /lineto load stopped { moveto } if BeginAngle Inc

EndAngle { CoilLoop } for EndAngle CoilLoop mtrx setmatrix } def

/ZigZag { /ArmB ED /ArmA ED 2 div /w ED w mul /h ED /y1 ED /x1 ED /y0 ED

/x0 ED x1 y1 translate y0 y1 sub x0 x1 sub 2 copy Pyth /TotalLength ED

Atan rotate TotalLength ArmA sub ArmB sub dup h div cvi /n ED n h mul

sub 2 div dup ArmA add /ArmA ED ArmB add /ArmB ED /x ArmB h 2 div add

def mark 0 0 ArmB 0 n { x w /w w neg def /x x h add def } repeat

TotalLength ArmA sub 0 TotalLength 0 } def

end

% END pst-coil.pro

%%EndProcSet

%%BeginProcSet: pst-text.pro

% PostScript header file pst-text.pro

% Version 97, 94/04/20

% For copying restrictions, see pstricks.tex.

/tx@TextPathDict 40 dict def

tx@TextPathDict begin

% Syntax:  <dist> PathPosition -

% Function: Searches for position of currentpath distance <dist> from

%           beginning. Sets (X,Y)=position, and Angle=tangent.

/PathPosition

{ /targetdist exch def

  /pathdist 0 def

  /continue true def

  /X { newx } def /Y { newy } def /Angle 0 def

  gsave

    flattenpath

    { movetoproc }  { linetoproc } { } { firstx firsty linetoproc }

    /pathforall load stopped { pop pop pop pop /X 0 def /Y 0 def } if

  grestore

} def