lisp - getpoint geometric center of last entity

[nmckelveyHMN4X]

As per the above. Looking for a little help with a lisp routine. 

I have to routine running that draws a region and the next step I am looking for is to set a point  as the geometric center of that region so I can use that value in the next stage of the routine. Any help for this line of code would be appreciated.

(SETQ p3 (getpoint ……"gcenter"……."last"...???

Thanks in advance 

[dbhunia · Accepted solution]

Check >>THIS<<

Or if your last object is a "REGION" then try like this...

(setq P3 (vlax-get (vlax-ename->vla-object (entlast)) 'Centroid))

[nmckelveyHMN4X]

Thank you so much. 

Worked perfectly!!

[Kent1Cooper]

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@nmckelveyHMN4X wrote:
...

(SETQ p3 (getpoint ……"gcenter"……."last"...???

...

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If it's a closed Polyline or Spline:

(setq p3 (osnap (vlax-curve-getStartPoint (entlast)) "gcen"))

[That's assuming there's nothing else with a geometric center around that it could snap to instead, when "picked" at the object's start point.]

You will need to do this first, if not done already, to get that (vlax-curve...) function:

(vl-load-com)

[Michiel.Valcke]

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If it's a closed Polyline or Spline:

(setq p3 (osnap (vlax-curve-getStartPoint (entlast)) "gcen"))

[That's assuming there's nothing else with a geometric center around that it could snap to instead, when "picked" at the object's start point.]

You will need to do this first, if not done already, to get that (vlax-curve...) function:

(vl-load-com)

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@Kent1Cooper 

Hello,

I'm sorry to restart an old post, but this might be a solution to a problem I'm currently facing. However, the part in my routine tries to get a list of handles and their corresponding geometric centers, so there will always be a lot of other objects to snap to when "picked" at the object's start point. Would turning off osmode sysvar help?

[Kent1Cooper]

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@Michiel.Valcke wrote:
....the part in my routine tries to get a list of handles and their corresponding geometric centers, so there will always be a lot of other objects to snap to when "picked" at the object's start point. Would turning off osmode sysvar help?

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If you're calling for a specific Osnap mode, that would override any running mode(s) that you have set, so I think if it's not getting the geometric center of the object you want, turning OSMODE off probably would not help.

[john.uhden]

Hmm.  2002 doesn't have a "gcen" snap.  That's cool.