DR - Relative direction ; DR [ - Page 202

CHAPTER 4 HP-GL/2 - 46 

90 LPRINT "DT";" 
100 LPRINT "DT0,2;LB_*_1988#"; "DI2,2;LB_*_1989#"; 
110 LPRINT "DT2,0;LB_*_1990#"; "DI2,-2;LB_*_1991#"; 
120 LPRINT "DT0,-2;LB_*_1992#"; "DI-2,-2;LB_*_1993#"; 
130 LPRINT "DT-2,0;LB_*_1994#"; "DI-2,2;LB_*_1995#"; 
140 LPRINT "PA3500,5350;DI", COS(0),SIN(0); "LB_*_2000"; CHR$(13); "#"; 
150 LPRINT "DI", COS(RAD); SIN(RAD); "LB_RETURN POINT"; CHR$(13); "#"; 
160 LPRINT CHR$(27); "%0A"; 
170 LPRINT CHR$(27); "E"; 
180 END 
 
<sample 54> 

DR - Relative direction 

DR [ 

run

, 

rise

 ] [;] 

run

 : X-component of the printing direction expressed as a percentage of the x-component of the 

distance between P1 and P2. 

rise

 : Y-component of the printing direction expressed as a percentage of the y-component of the 

distance between P1 and P2. 



This command determines the direction in which subsequent labels will be printed. 



Values for run and rise are clamped real numbers. 



The instruction is ignored if run and rise are both 0. 



When you issue a DR instruction the carriage return point is set to the current pen location. 



Any text path that you set with the DV instruction will combine with the current printing direction to 
determine the layout of characters on the page. 



If you change the positions of P1 and P2 the printing direction will change accordingly. 



If you omit the parameters the printing direction is horizontal and the run = 1% of |P2X-P1X|. 



Actual values for run and rise are changed relative to the P1 and P2 value.    It is calculated as below: 

actual run = 

run

 parameter / 100 x (P2x - P1x) 

actual rise = 

rise

 parameter / 100 x (P2y - P1y) 



run=70%

rise = 60%

(70,0)

(0,60)

(0, 100)

(0, 100)

(100, 100)