WG - Fill wedge ; WG r,q1,qc(,qd)[;] - Page 368

CHAPTER 9 HP-GL - 17 

WG - Fill wedge 

WG r,q1,qc(,qd)[;] 

r ; Radius in user units or graphics units  

q1 ; Start point angle 

qc ; Arc angle  

qd ; Chord angle 



Fill in a wedge centred on the current position with radius 

r

, start point angle 

q1

, arc angle 

qc

 and chord 

angle 

qd

. 



After plotting, the cursor returns to its point of origin. 



Plotting is performed whether the pen is up or down. 



When scaling has been performed, the circle is plotted in user units. 



Also, when scaling has been performed, the value for r is a real number. 



When there is no scaling, the circle is plotted in graphics units. 



When there is no scaling, the coordinate value for r is an integer number. 



The value for 

q1

 is a clamped real number. 



When 

q1

 is positive, the positive direction of the X axis relative to the current position is set at 0 degrees and 

the start point is sought in the counterclockwise direction.  The opposite occurs when q1 is negative: the 
negative X axis is set at 0 degrees and the start point is sought by going clockwise. 



The value for 

qc

 is a clamped real number. 



Plotting proceeds counterclockwise when 

qc

 is positive and clockwise when it is negative. 



The value for 

qd

 is a clamped real number. 



When 

qd

 is not specified, the chord angle is the default value ( 5 degrees ). 

Fill pattern specified

by FT and PT

Radius

Start point angle

Current position

0 degrees

Arc angle

10 ' *** WGEX *** 
20 LPRINT "IN;SP2;FT3,100;" 
30 LPRINT "PA5000,4000;" 
40 LPRINT "WG1250,90,180,5;" 
50 LPRINT "SP4;FT4,100,45;" 
60 LPRINT "WG1250,270,120;" 
70 LPRINT "SP1;PT.3;FT1;" 
80 LPRINT "WG1250,30,60;PG;" 
90 END 
 
<Sample 75>