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Revision C 16/01/96
Chapter 9 "HP-GL" 10
2.3. Pen Control and Plot Instructions
Instruction Function
PU Pen Up
PD Pen Down
PA Plot Absolute
PR Relative Coordinate Pen Move
AA Absolute Arc Plot
AR Relative Arc Plot
CI Circle
PU - Pen Up
PU [ X,Y [,...]] [;]
X ; X coordinate of the cursor movement destination
Y ; Y coordinate of the cursor movement destination
•
X and Y are either relative or absolute, depending on whether a PA or a PR was the last plot command
executed. The absolute coordinates are set as default.
•
Moves the cursor to the specified coordinates after raising the pen.
•
Using this instruction without a parameter field raises the pen without changing the cursor position.
•
When scaling is on, user coordinates are used.
•
Also, when scaling has been performed, the values for X and Y are real numbers.
•
When scaling is off graphics units are used.
•
When there is no scaling, the coordinates values for X and Y are integer numbers.
Current position
(X1, Y1)
(X2,Y2)
(X3, Y3)
(Xn, Yn)