Brother HL- SERIES, Technical Reference Manual, Page: 335 / 392

Revision C 16/01/96
Chapter 9 "HP-GL" 8
2.2. 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
,P1
Y,
P2
X
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).
•
P2
X
and P2
Y
may be omitted. (If P2
X
and P2
Y
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, 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 61>