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Help: How to find 3D coorinates of Intersection of Two Lines

15 REPLIES 15
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Message 1 of 16
FBacket
1135 Views, 15 Replies

Help: How to find 3D coorinates of Intersection of Two Lines

Hi, I'm very new to Autocad Inventor.

 

I'm opening up an .igs file and I just want to find out the 3D coordinates of the intersection of two lines drawn in the .igs file.

 

I tried using the "inspect" > "distance" tool, but it only gives me the length of the line.

 

I need to find the 3D coordinates of where two lines intersect. If someone can provide me a solution that isn't too complicated, that would be really great.

 

Thanks.

 

 

Cheers

 

 

15 REPLIES 15
Message 2 of 16
JDMather
in reply to: FBacket

What version of "AutoCAD" Inventor are you using?

Can zip and attach the original file here?  Or at least a screen capture?

 

Is you origin in the desired location?

 

Are the two lines drawn in a 2D sketch or a 3D sketch?

 

Is the intersection point a physical intersection or a projected intersection?

 

Is the intestersection point a vertex?

 

When using the Measure Distance tool - what does the dialog box say when selecting the FIRST point? (or right before selecting the first point - when hovering about to select the point)


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Autodesk AutoCAD 2013 Certified Professional
Certified SolidWorks Professional


Message 3 of 16
FBacket
in reply to: JDMather

Hi JDMather, I'm using Autodesk Inventor Pro 2014.

 

The two lines are drawn in 3D. See attached jpeg.

 

There isn't a physical drawn point at the intersection of the two lines. But the lines do intersect. How do I find the 3D coordinates of those "X" crosses in the picture.

 

Thanks.

 

Message 4 of 16
admaiora
in reply to: FBacket

Hi FB,

 

i don't see well your geometry that has been imported in inventor.

 

You can use the normals command as project geometry and Point workfeature to identify the intersection point, then select it right click>Measure

Admaiora
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Message 5 of 16
CCarreiras
in reply to: FBacket

Hi!

 

Edit the sketch and create points in the intersection.

Create a point, connect with "line 1" and "line 2", the point will be in the intersection of both lines.

Next, select the point, RigthMouseButton  and choose measure... and that's it!!!

 

Tip, use FIX constrain in the lines before create and place the points, this way you ensure that the lines doesnt move.

 

Clipboard05.png

 

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CCarreiras

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Message 6 of 16
JDMather
in reply to: FBacket

An alternative to the other suggestions -

if you edit the sketch and add a sketch point anywhere in space (close to the intersection), then add a coincident constraint to the first curve and then coincident constraint to the second curve.  The sketch point will be parametrically constrained to the intersection (or apparent interesection if it is implied).  Now you have a point to the the Position with first selection of Measure Distance.

 

Attach your file here if you can't figure it out.


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Autodesk Inventor 2019 Certified Professional
Autodesk AutoCAD 2013 Certified Professional
Certified SolidWorks Professional


Message 7 of 16
FBacket
in reply to: CCarreiras

Hi Ccarreiras,

 

I tried to use the Point of Intersection of Two Lines (see attached picture 2). But when I try to select the two lines, I can't even click on any line.

 

When I press esc and cancel it, I can select the 2 lines without any problem (picture 3).

 

So I don't know why I am unable to select the two lines using the Point of Intersection of Two Lines function.

 

Any suggestions?

 

Thanks.

 

 

 

 

 

 

Message 8 of 16
admaiora
in reply to: FBacket

Did the 2 curves have one point in common?

 

If yes, you can project teh curves, then do one of the previous solutions.

Admaiora
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Message 9 of 16
CCarreiras
in reply to: FBacket

Hi!

 

Create a new 3D sketch and use "Project Curves" to project the green curves to the new 3D sketch.

Create now the intersection points.

 

Now, You can turn off the green elements visibily for better work.

 

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CCarreiras

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Message 10 of 16
FBacket
in reply to: admaiora

Hi Admaiora, no the two lines do not have a drawn on point in common. They do intersect though and that's the intersection point that i want to find out the coordinates.

Message 11 of 16
CCarreiras
in reply to: FBacket

HI!

 

That's why you have to create these points. Do what i'm telling you and you solve this simple question...

 

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Message 12 of 16
admaiora
in reply to: FBacket

No. I meant.. Do the 2 curves actually intesect?

 

 

Admaiora
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Message 13 of 16
FBacket
in reply to: CCarreiras

Hi Carlos,

 

I projected the curves to highlight the two lines, but it doesn't do anything (i.e. I cannot click ok). See attached picture.

 

So I can't seem to draw the lines and after that I can't use the Point (intersection of two lines) to find the insection of those two curves.

 

Any other suggestions?

 

Thanks.

Message 14 of 16
CCarreiras
in reply to: FBacket

HI!

 

Sorry... in 3D sketch is "Include geometry" the button near you are using.

Project geometry is in 2D Sketch... my mistake.

 

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CCarreiras

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Message 15 of 16
JDMather
in reply to: FBacket

I don't think you are following my instructions.

Attach your *.ipt file here and end all doubt.

You should not need to project anything.


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Message 16 of 16
johnsonshiue
in reply to: FBacket

Hi! I would like to see the ipt file. It is possible that the two lines actually do not intersect (they look like). I need to see the file to say it for sure.

Thanks!

 



Johnson Shiue (johnson.shiue@autodesk.com)
Software Test Engineer

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