Extract a curve from 3 interpolate curve

Hi,

I'm hoping somebody could help me to solve the problem that i found in my case.
I was trying to make/create surface through "edge srf" from 3 separated curves. But unfortunately, when I was trying to explode a geometry that i generated from some modified-control points of 3 edges of a triangle. It didn't result a 3 separated curves that i need for "edge srf" component.
I've tried to use "list item" component to get those three curves, but it didn't work as well.

Is there any way to get those curves? or may be i chose a wrong method to create this surface?Thanks in advance.

Best,
Dani

Attachments:

Test_02_01.png, 317 KB
Test_02_02.png, 334 KB
Test_02.ghx, 240 KB

Replies to This Discussion

Permalink Reply by Danny Boyes on July 7, 2010 at 3:04am

I've just tried to use the Edge Srf component in 0.7.00030 and it appears to not work with only three inputs. This would need to be directed at David to fix if it is a bug.

But also looking at your definition there is a problem with your List Item components being used on data branches for this purpose. Have a look at the image below. The dashed lines represent multiple data on multiple branches if you require the first item on each branch or the second item on each branch etc. then list item works well but if you require the first branch only then you need to select the branch with a different component.

The Param Viewer Component allows you to extract the path structure from the component you can then use the List Item component to retrieve the individual branches and then the Branch Component to retrieve each branch containing the points for one curve.

To view the dashed lines you would need to select Draw Fancy Wires from the View menu

Permalink Reply by danihermawan on July 7, 2010 at 3:46am

Hi Danny,

Thank you for your tips....it's really helpful.
About the edge srf component, actually it is written in component's tool tips: "create a surface from 2,3 or 4 edge curves". So, may be it's a bug.
Again, thanks danny

Best,
dani

Permalink Reply by Danny Boyes on July 7, 2010 at 4:24am

If your just using a flat grid to create the surfaces then you could use the Srf4Pt Component.

Explode the Polyline>Extract the Start Points>Create Srf4Pt (with only 3 inputs)

Attachments:

SrfFromGridPoints.png, 49 KB

Permalink Reply by danihermawan on July 7, 2010 at 5:19am

Thanks for your last suggestion.
But, what I was trying to create just a grid of convex surfaces. Which those convex-surfaces were derived from 2d triangular cells (see the following image, the expected surface was in the left corner which done manually).
Since the edge srf didn't work for this moment, probably i have to find another method to get those surfaces.

best,
dani

Attachments: