Closed area

[giskumar]

Hi all,

 

Is there a way to find which points creates a closed polygon among a set of points.

 

I have a list of points, Using that points i want to create a closed polygon.

here no need to use all points. Need to use only those points which will creates a closed polygon.

 

for ex:

 

the following points will create a self inspecting polyline

 

X= 1.0715 Y= 2.2652

X= 1.0547 Y= 3.5137

X= 1.0293 Y= 5.5300

X= 2.5485 Y= 5.8253

X= 3.1308 Y= 4.3405

X= 0.1263 Y= 3.8849

 

From this i am excepting the following result, which is a closed part in the self intersecting polyline.

 

((1.04825 4.02473)(1.02935 5.52999)(2.54849 5.82526)(3.13082 4.34049))

 

 

Thanks,

Kumar.

[Lee Mac]

Using that points i want to create a closed polygon.

here no need to use all points. Need to use only those points which will creates a closed polygon.

 

Any three non-collinear points will form a closed polygon (triangle).

[giskumar]

I think my explanation is not clear.

 

Please refer the snap shot.

 

i have self intersected poly line. from that i want extract vertices for only closed part (which is marked with red circle).

 

any ideas to this.

 

Thanks,

Kumar.

[Lee Mac]

I don't believe that could be determined from just the points, since, as I stated, any combination of three points would form the closed area.

[irneb]

Why not just use the Boundary command to generate a new polyline inside the enclosure?

[BlackBox]

Why not just use the Boundary command to generate a new polyline inside the enclosure?

 

... That's what I'd do.

[giskumar]

Thanks a lot.

 

I am new to autocad and not aware of boundary command.

This works great for me.

[irneb]

Don't worry! There's hundreds of commands like these where I've found people using ACad for years don't know about them.

 

As an example: http://forums.augi.com/showthread.php?t=74304

[SLW210]

OOPS ................ I haven't used that in a decade.