View direction of vectors

Hi,

Is it possible to see in what direction a vector goes?

For instance, if I draw a polyline based shape in a counter clockwise direction, I obviously know the direction. But if I draw a shape which is built up out of different shapes, exploded, trimmed, and joined again, I have no idea of the direction of the vectors. For cnc tool radius correction, it's important to know in what direction it goes.

• You can use a linetype with arrows.

```*ARROWS,Arrows -> -> ->
A,1,[ZIG,ltypeshp.shx,r=-90,x=-0.25,y=0.25,s=0.25],-1
```
• Also when changing Length in Properties - which end will change?

• @Roy Klein Gebbinck said:
You can use a linetype with arrows.

```*ARROWS,Arrows -> -> ->
A,1,[ZIG,ltypeshp.shx,r=-90,x=-0.25,y=0.25,s=0.25],-1
```

Roy, thank you!

Feels a bit like a workaround, but in my workflow it actually works fine.

• @Tom Foster said:
Also when changing Length in Properties - which end will change?

Will this work with closed polylines?

• There are a few is anticlockwise lisps for plines then can do Pedit R.

;; get closed polygon's area

(defun ss-pts2area (l)
(/ (apply (function +)
(mapcar (function (lambda (x y)
(cons (last l) l)
l))
2.)
)

;_force pointset CCW
(setq plent (entsel "\nPick pline"))
(setq co-ord (mapcar 'cdr (vl-remove-if-not '(lambda (x) (= (car x) 10)) (entget (car plent)))))

(if (< (ss-pts2area co-ord) 0)
(command "pedit" plent "R" "")
)