CHAPTER 4 HP-GL/2 - 2 
CONTENTS 
1.  COMMAND LIST .................................................................................................................. 4  
2.  INTRODUCTION .................................................................................................................. 6  
3.  TERMINOLOGY ................................................................................................................... 7 
3.1.  Picture Frame........................................................................................................................... 7 
3.2.  Anchor Point ............................................................................................................................ 7 
3.3.  Graphics Window ..................................................................................................................... 7 
3.4.  Hard Clip Limits ........................................................................................................................ 7 
3.5.  Soft Clip Limits ......................................................................................................................... 7 
3.6.  Graphics Units ......................................................................................................................... 7 
3.7.  User Units ................................................................................................................................ 7 
3.8.  Current Units ............................................................................................................................ 7 
3.9.  Pens ......................................................................................................................................... 7 
3.10.  Absolute and Relative Plotting ................................................................................................. 8 
3.11.  Fills ........................................................................................................................................... 8 
4.  COMMAND SYNTAX ........................................................................................................... 9 
4.1.  Mnemonic................................................................................................................................. 9 
4.2.  Parameters............................................................................................................................... 9 
4.3.  Separators ............................................................................................................................... 9 
4.4.  Terminator ................................................................................................................................ 9 
5.  THE HP-GL GRAPHICS WINDOW .................................................................................... 10 
5.1.  Units ....................................................................................................................................... 10 
5.2.  The Scaling Points P1 and P2 ............................................................................................... 10 
5.3.  Scaling ................................................................................................................................... 10 
5.4.  Transformation ....................................................................................................................... 10 
6.  PREPARING TO PRINT GRAPHIC IMAGES .................................................................... 11 
6.1.  Setting Up the Graphics Window ........................................................................................... 11 
6.2.  Using Existing Image Plots .................................................................................................... 11 
6.3.  Printing an Image ................................................................................................................... 11 
6.4.  Entering HP-GL/2 Mode ......................................................................................................... 11 
6.5.  Quitting HP-GL/2 Mode .......................................................................................................... 11 
7.  COMMANDS ...................................................................................................................... 12 
7.1.  Initialize Commands ............................................................................................................... 12 
7.2.  Plot Area and Unit Setting Instructions .................................................................................. 14 
7.3.  Pen Control and Plot Instructions .......................................................................................... 18 
7.4.  The polygon group ................................................................................................................. 25