Lowest point of 3D Polyline

[envirocad]

I made a surface and also made a 3D polyline of the surface boundary. I need to locate the lowest point of the 3D Polyline boundary. The polyline has over 100 vertices. Is there a way to query the highest and lowest point along a pline ??

 

Thanks!!

[alanjt]

You can either extract the coordinates with vla-get-coordinates and combine the list into groups of 3 or entnext through the selected ename (using entsel), create a list of coordinates (X,Y,Z), sort by Z value, then you can easily take the highest and lowest value and label accordingly.

 

eg.

HighLowLabel.zip

[eldon]

Of course a visual way is to take a Front View and you would be able to see the lowest and the highest point.

[alanjt]

Of course a visual way is to take a Front View and you would be able to see the lowest and the highest point.

 

Very true, it would just be a pain if there are points with 'close' elevations.

[envirocad]

You can either extract the coordinates with vla-get-coordinates and combine the list into groups of 3 or entnext through the selected ename (using entsel), create a list of coordinates (X,Y,Z), sort by Z value, then you can easily take the highest and lowest value and label accordingly.

 

eg.

[ATTACH]21100[/ATTACH]

 

 

I'm not familiar with LISP. Do you know of a Lisp that will label the lowest point of a 3D Polyline ? or export a x,y,z file that can be sorted by elevation....as you have specified.

 

Thanks!!

[alanjt]

I'm not familiar with LISP. Do you know of a Lisp that will label the lowest point of a 3D Polyline ? or export a x,y,z file that can be sorted by elevation....as you have specified.

 

Thanks!!

Ahh, what the hell. Attached in my original post.

[envirocad]

Ahh, what the hell. Attached in my original post.

 

You are the MAN!!

[alanjt]

You are the MAN!!

Enjoy and you're welcome.

Oh yeah, and welcome to the forum.