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10/10/03
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 degree
s
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>