CHAPTER 9 HP-GL - 6 
3.  COMMANDS 
3.1.  Initialization and Default Setting Instructions 
DF - Default set instruction 
DF[;] 
  Returns the graphics mode to the default conditions. 
  The following are the default settings. 
Function Equivalent 
Instruction 
Condition 
Plot mode  PA;  Absolute plotting 
Relative character direction DR 1,0;  Horizontal 
Line type  LT;  Solid line 
Line pattern length  LT;  4% of distance from P1 to P2 
Window  IW;  Set at limits of printable area 
according to paper size 
Relative character size  SR;  Width=0.75% of  |P2x - P1x| 
Height=1.5% of |P2y - P1y| 
Symbol mode  SM;  Off 
Tick length  TL;  X-axis: 0.5% of |P2y - P1y| 
Y-axis: 0.5% of |P2x - P1x| 
Standard character set  CS 0;  Character set 0 
Alternate character set  CA 0;  Character set 0 
Character set  SS;  Standard character set selected 
Character slant  SL 0;  0 degrees 
Scaling SC; Off 
Label terminator  DT chr$(3)  chr$(3) 
Chord angle   -----  5 degrees 
Fill type  FT;  Bi-directional fill, type 1 
Fill distance  FT;  1% of distance from P1 to P2 
Fill slant  FT;  0 degrees 
Pen Thickness  PT;  Set at 0.3 mm 
NOTE:  The location of the scaling points(P1, P2) remains constant. 
 
IN - Initialize set instruction 
IN[;] 
  Returns the graphics mode to the following initial conditions; 
Function Equivalent 
Instruction 
Condition 
Plot mode  PA;  Absolute  
Relative character direction DR 1,0; Horizontal 
Line type  LT;  Solid line 
Line pattern length  LT;  4% of distance from P1 to P2 
Window  IW;  Set at limits of printable 
area according to paper size 
Relative character size  SR;  Width=0.75% of |P2x-P1X| 
Height=1.5% of |P2y-P1y | 
Symbol mode  SM;  Off 
Tick length   TL;  X-axis: 0.5% of |P2y-P1y | 
Y-axis: 0.5% of |P2x-P1x| 
Standard character set  CS 0;  Character set 0 
Alternate character set   CA 0;  Character set 0 
Character set  SS;  Standard character set 
selected 
Character slant  SL 0;  0 degrees 
Scaling SC ; Off 
Label terminator  DT chr$(3)  chr$(3) 
Chord angle  -----  5 degrees