3.2. Plot Area and Unit Setting Instructions; Function Equivalent ; Instruction - Page 358

CHAPTER 9 HP-GL - 7 

Function Equivalent 

Instruction 

Condition 

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 

Pen condition 

PU; 

Pen up 

Rotation 

RO; 

Set at 0 degrees 

Scaling points 

IP; 

Initialized according to  
paper size 

3.2.

Plot Area and Unit Setting Instructions 

Instruction Function 
IP 

Scaling point  

SC Scale 
IW Input 

window 

RO 

Rotate coordinate system 

PG Page 

output 

IP - Input scaling point  

IP [ P1

X

, P1

Y 

[,P2

X,

 P2

Y

]] [;]  

P1

X

 ; 

X

 coordinate of P1    

P1

Y

 ; 

Y

 coordinate of P1 

P2

X

 ; 

X

 coordinate of P2    

P2

Y

 ; 

Y

 coordinate of P2 



The coordinate values used are absolute values in graphics units. 



Sets the location of the scaling points(P1, P2). 



Coordinate values for P1

X

, P

1Y

, 

P2X

 and P2

Y

 are given as integer numbers. 

The IP instruction is ignored when the set coordinates are outside the print area. 



Using this instruction without a parameter field initializes the scaling points(P1, P2). 



P2X and P2Y may be omitted.  (If P2X and P2Y are omitted, P2 is set automatically so as not to alter the 
distance between P1 and P2). 

SC - Scale 

SC   Xmin,  Xmax, Ymin, Ymax 

Xmin ; X coordinate of P1  

Xmax ; X coordinate of P2 

Ymin ; Y coordinate of P1  

Ymax ; Y coordinate of P2 



Sets the scale for the coordinates the user wants to establish. 



Coordinate values for Xmin,  Xmax, Ymin and Ymax are given as real numbers.  



Using this instruction without a parameter field turns the scaling off. 



The technical terms user unit and graphics unit as used in this manual are defined as follows; 
  

User unit 

: the unit of the coordinates set by the SC instruction 

Graphics unit 

: the unit (1/1016 of an inch) of the coordinates not set by the SC instruction 

 
10 '*** SCEX *** 
20 LPRINT "IN; IP3000,2000,4500,3500;SP1;SC0,120,0,120;" 
30 FOR T=0 TO 2*3.1416+3.1416/20 STEP 3.1416/20 
40 X=COS(T)*100 
50 Y=SIN(T)*100 
60 LPRINT "PA";X;",";Y;";PD;" 
70 NEXT T 
80 LPRINT "PU;" 
90 END 
 

  <Sample 

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