CHAPTER 9 HP-GL - 18 
3.5.  Plot Function Instructions 
Instruction Function 
FT Fill Type 
LT Line Type 
PW Pen Width 
SM Symbol Mode 
SP Select Pen 
TL Tick Length 
XT X Tick 
YT Y Tick 
PT Pen Thickness 
 
FT - Fill type 
FT [ n [, d [, q]]] [;] 
n : Fill type 
d : Fill interval (interval between the parallel lines of the area being filled) 
q : Fill angle (degrees ) 
 
  Sets the fill type,  interval and angle when filling an area.  
  The value for n is a clamped integer number. 
   Solid lines (bi-directional fill) 
   Solid lines (single direction fill) 
  Parallel  lines 
  Crosshatching 
  The fill interval when n is 1 or 2 is the interval set by the pen thickness (PT) instruction. 
  Any value given for d when n is 1 or 2 will be ignored. 
  If d is omitted,  the fill interval already specified will be used. 
  If d is 0,  the default value will be used ( 1% of distance from P1 to P2. ) 
  The value of d is a clamped real number. 
  If q is omitted,  the fill angle already specified will be used. 
  The value of q is a clamped real number. 
 
LT - Line type selection 
LT [, n [, p ]] [;] 
n ; Line pattern number 
p ; Line pattern length (percentage or millimeters of distance between P1 and P2) 
 
  Specifies the line type and pattern length. 
  When the n parameter field is omitted a solid line is selected. 
  When the p parameter field is omitted the pattern length is 4% of the distance between P1 and P2 (default 
value ). 
  The value of n is a clamped integer number. 
  The value of p is a clamped real number from 0.0000 to 127.9999. 
  When p is omitted the previously set line pattern length is used. 
 Default :Solid line 
    :For straight line, start and end points are plotted. 
    :For an arc, plotting takes place for every chord angle that is set. 
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P