Specifications

Revision C 16/01/96
Chapter 8 "HP-GL2" 28
EP - Edge Polygon
EP [;]
• This command plots the outline of the polygon currently stored in the polygon buffer.
• The command only plots between points defined when the pen was down.
• The command plots an outline irrespective of whether the pen is currently up or down.
• The command does not affect the data in the polygon buffer.
• On completion of the plot the cursor returns to the original poition.
EW - Edge Wedge
EW r , q1 , qc (, qd )[;]
r ; Radius in current units
q1; Start point angle
qc ; Arc angle
qd ; Chord angle
• Plots 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.
• You should use this command with the type "isotropic". Anisotropic type may make the wedge stretch.
• r specifies the radius of the circle. A positive value for r places the 0° reference point onto the positive x-
axis and a negative value for r places the 0° reference point onto the negative x-axis.
• The value for q1 is a clamped real number.
q1
qc
r
0° reference point
current
position
• q1 specifies the wedge starting point relative to the 0 degree reference point.
• 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.
• qc specifies the angle of the wedge in degrees.
• The value for qc is a clamped real number.