Selection set that goes through a single point

[saitoib]

Hi all！

Can I use ssget to create a selection set that goes through a single point?

Thank you.

[hak_vz]

Try to be more specific. What you want to select at that single point?

For a start read this ssget guide from Lee Mac, part about logical filters.

[ВeekeeCZ]

Sure...  (ssget pt)

[saitoib]

@hak_vz 

@ВeekeeCZ 

I'm sorry. I didn't explain it well enough.
For example, in the following figure, how can I select the three lines that pass through the point (100 0 0)?

line 0,0 110,0

line 90,0 200,0

line 100,0 100,100

[ВeekeeCZ]

I typically calculate a small rectangle and use crossing selection.

(ssget "_C" '(99 -1) '(101 1))

Edited: Kent, thx for the heads up.

[Kent1Cooper]

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@ВeekeeCZ wrote:

Sure...  (ssget pt)

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That finds only one object.

[Kent1Cooper]

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@ВeekeeCZ wrote:

I typically calculate a small rectangle and use a window selection.

(ssget "_W" '(99 -1) '(101 1))

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I think you mean "_C".

[Kent1Cooper]

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@saitoib wrote:

.... in the following figure, how can I select the three lines that pass through the point (100 0 0)?

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According to the description in Help for (ssget), this ought to do that:

(setq ss (ssget "_:E" '(100.0 0.0 0.0)))

but for some reason I haven't figured out, it gives me a "bad point argument" error message.

EDIT:  It seems that the :E mode only works with User pick of a point -- see >this< and >here<.

But you can use a Crossing selection without building a larger box, but just use the same point for both corners:

(setq pt '(100.0 0.0 0.0))
(setq ss (ssget "_C" pt pt))

[hak_vz]

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@saitoib wrote:

@hak_vz 

@ВeekeeCZ 

I'm sorry. I didn't explain it well enough.
For example, in the following figure, how can I select the three lines that pass through the point (100 0 0)?

line 0,0 110,0

line 90,0 200,0

line 100,0 100,100

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You didn't read the text at link that I provided. There is actually a sample for similar case.

[hak_vz · Accepted solution]

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@saitoib wrote:

@hak_vz 

@ВeekeeCZ 

I'm sorry. I didn't explain it well enough.
For example, in the following figure, how can I select the three lines that pass through the point (100 0 0)?

line 0,0 110,0

line 90,0 200,0

line 100,0 100,100

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Command: (setq ss (ssget "c" '(100 0 0) '(100 0 0)))
<Selection set: 10>
Command: M
MOVE
Select objects: !ss
<Selection set: 10>
3 found

[saitoib]

@hak_vz 

Thank you very much.
I didn't know there was a way to do this.
I was able to solve the problem.