Lofting wrong position

Hi guys,

I am trying to extrude a set of surfaces which are produced through a doubly curved surface so I can get this type of results:

The extrusion should not have any bending the components should be straight.

1)When I subdivide the surface on UV it does not follow the outline of the given surface.

2) And also the extrusion doesn't not follow the surface path.

Any ideas how I can succeed the above result?

Natasa

Attachments:

TORTION DIRECTION_002.3dm, 73 KB
LOFTING DISPOTITION.jpg, 422 KB

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Permalink Reply by Victor Leung on May 3, 2012 at 10:14pm

Hi
If you could draw a sketch to explain your two points a bit more. Can't get what you want to achieve.

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Permalink Reply by Natasa on May 3, 2012 at 10:42pm

Yes of course

Point 1):TThe UV division is outside the boundary of the given surface(yellow outline). The blue part represents the part that will be lofted and I dont want

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Permalink Reply by Natasa on May 3, 2012 at 10:43pm

Point 2)

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Permalink Reply by Victor Leung on May 3, 2012 at 11:16pm

1, You might have worked with an trimmed surface. If you read about Nurbs surface and how trim surface is defined, you will know that the UV curves are not changed after trimming operation.

Try use simple lofted surface for this.

2. The way you moved the lines to X direction and loft them back is not sophisticated enough.

Simplest way if they are all parallel to Z Direction: Try move the curves to Z (move up), loft the two sets, and then extrude the resulting surface to X Direction. You may even want to extrude to X 1 unit, move the solids to -X half unit, to position them on the center line.