HP 5961-0509 manual RT, Relative Arc Three Point, Chord angle Clamped real, 20-48The Vector Group

RT, Relative Arc Three Point

This command draws an arc segment, using relative coordinates, from a starting point through an intermediate point to an end point. Use RT when you know these three points of an arc.

RT X\incr inter,Yincr inter, X\incr end\,Yincr end[,chord angle;]

Parameter			Format	Functional Range	Default
Xincr inter, Yincr inter			current units	-230to 230 - 1	no default
X	incr end	, Y	current units	-230to 230 - 1	no default
		incr end
chord angle			clamped real	0.5° to 180°	5°

The RT command uses the current pen location and two specified points to calculate a circle and draw the appropriate arc segment of its circumference. The arc starts at the current pen location, using the current pen, line type, line attributes and pen up/down status. You specify the intermediate and end points. After drawing the arc, the pen location remains at the end of the arc.

zXIncr Inter, YIncr Inter — Specify the location of an intermediate point of the arc in relative increments (relative to the current pen location). The arc is drawn in a negative or positive direction, as necessary, so that it passes through the intermediate point before the end point.

zXIncr End,YIncr End — Specify the location of the end point of the arc in relative increments (relative to the current pen location).

zChord Angle — Specifies the chord angle used to draw the arc. The default is a chord angle of 5°. (The Arc Absolute command description, earlier in this chapter, contains more information on chords and chord angles.)

Intermediate and end point coordinates are interpreted in current units: as user-units when scaling is on; as plotter units when scaling is off. If current scaling is not isotropic, the arc drawn is elliptical rather than circular. Note the following about intermediate and end points:

zIf the intermediate point and end point are the same as the current pen location, the command draws a dot.

zIf the intermediate point is the same as either the current pen location or the end point, a line is drawn between the current pen location and the end point.

20-48The Vector Group EN