WG - Fill wedge ; WG r,q1,qc(,qd)[;] - Page 342

2001/10/02 

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 t he 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 

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