3D SPLINE

[rosbrugh]

I'm using CATIA V5R12 P2, and I am having difficulty in making a 3D SPLINE to use as a rib centerline. Any suggestions?

 

[solid7]

I only have 1 suggestion at this point:

Be more specific as to the nature of your trouble.

 

[KooKoo]

If you've already gone through the online docs then as solid7 suggested, please provide more info.

 

[rosbrugh]

a 3D spline is a polyline, a spline that curves along all three axis simultaneously. It can not be plotted on two dimensions. As the line move from point 1,2,2 to 2,3,1, to 3,4,0 etc.

In Autodesk 3D products you can plot the points you need and it will draw a spline with these points.

 

[solid7]

You need points to start with, before you can create a 3D spline. It's not different than the example that you stated.

Before I go deeply over the edge, I'm predicating this example on the assumption that you are truly using the "spline" command, and not the 3D curve function in FreeStyle.

3D splines are created simply by selecting points. You can multi-select points to be used in a spline, either in the tree, or with a window, or you can pick them one by one. You can also impose tangency and continuity constraints. You need to be aware, however, that the spline will be constructed in the order that the points were created. So, you have to be a little clever in how you generate the points. If you are using the points to maintain history, for any reason, it's worth the time to PUT the points in order.

One of the VERY BEST ways to put points into a document with history, is to use design tables, and/or the "GSD point loft spline from excel" function that came with the help docs in versions up to R11. It is available in a modified version on several forums, to account for those of us who either have HD2 license, or for the change in the "OpenBody" label.

Hope that helps. If not, feel free to try again.

 

[solid7]

I'm not sure that that post was 100% clear, so let me add a thought...

When I say "You need to be aware, however, that the spline will be constructed in the order that the points were created," what I mean, is that if you have points 1-7, and you MULTI-SELECT, it will order the points numerically, (by point.value) no matter how funky the spline gets. You can always pick one by one, but unless you are doing just a simple spline, it sort of defeats the purpose.


Again, I hope that helps.

 

[rosbrugh]

I think I might have more answer than I need. ;-)>. I hate asking questions. I have always found that asking questions are harder on me than giving answers.

So let me ask this (duh)> "Is there a 3DSPLINE command in CATIA? If so, where is it located."

Terry

 

[jackk]

GSD workbench: INSERT + WIREFRAME + SPLINE and then select your points in sequence and OK.

Make sure you use SPLINE (with an 'L') and not SPINE (no 'L') - those are 2 different things

 

[solid7]

Try this:

It's the last button on the palette.

 

[jackk]

solid7: what's the trick to add images to a post, like you did above?

 

[solid7]

Before you make your post, hit the link at the bottom of the input box, called "Process TGML."

It will give you the complete guide to Tecumseh markup.

Hope that helps.

 

[jackk]

thanks

 

[JuhaEdag]

What Image? What do you need to see the image in the post.
I'm using Firefox.

 

[solid7]

I'm using firefox, and I see it just fine.

I don't see any forum settings to disable images in a session, so maybe check your install.

 

[JuhaEdag]

I tried Internet explorer as well it actually showed me an empty cross is there perhaps a plugin I'm missing??

 

[solid7]

I don't know.

Can you see images on other pages?

You might want to check out some of the other *-Tips forums, and see if anyone can answer.

Possibly this forum can help.




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