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MicroSurvey Software Inc. • View topic - Drawing an arc with point entities

Drawing an arc with point entities

Discussion of MicroSurvey CAD related issues and questions.

Moderators: Brian Sloman, Jason Poitras, James Johnston

Drawing an arc with point entities

Postby casual22 » Fri Jun 16, 2006 6:18 am

Is there a way to draw an arc using point entities with z values.
casual22
 
Posts: 14
Joined: Tue Mar 08, 2005 5:48 am
Location: Berlin. NJ

Postby Glen Cameron » Fri Jun 16, 2006 6:33 am

Arcs are 2D entities so require a 2D point to be used for all picks.

If you do a 3 Point Inverse in COGO the elevations are ignored and the arc is 2D.

If you draw an arc rather than calculating it, and you need to pick points that are in 3D, the only trick I can suggest i to use the ".xy" filter on each pick.

It would be entered like this:

: arc
Center/<Start of arc>: .xy

Select XY of: <-pick the point
Still need Z of: 0

Angle/Center/Direction/End/Radius/<Second point>: .xy

Select XY of: <-pick the point
Still need Z of: 0

End point: .xy

Select XY of: <-pick the point
Still need Z of: 0

This would draw the arc using the 3 points picked, filtering the Z and using the value of 0 for each pick.

BOLD text is what you would need to type
ITALIC text shows you that you have to pick a location on screen (you may need to use Entitiy Snaps when picking)

Cheers,
Glen W. Cameron, C.E.T.
City of North Bay, Ontario
Glen Cameron
 
Posts: 1395
Joined: Fri Nov 08, 2002 12:18 pm
Location: Corbeil, Ontario, Canada

Arcs with points

Postby John Gallagher » Fri Jun 16, 2006 8:07 am

Type in 3ptarc and follow the prompts.
John Gallagher
John Gallagher
 
Posts: 64
Joined: Fri Nov 08, 2002 1:35 pm
Location: Long Island New York

Postby Glen Cameron » Fri Jun 16, 2006 8:17 am

Thanks John - I forgot about that command! :roll:

Cheers,
Glen W. Cameron, C.E.T.
City of North Bay, Ontario
Glen Cameron
 
Posts: 1395
Joined: Fri Nov 08, 2002 12:18 pm
Location: Corbeil, Ontario, Canada


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