extending wire

Davide Canalia's picture
Davide Canalia
Thu, 06/19/2008 - 18:03
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Other usage issues

Hi,
i need to extend the first and last eddges of an open wire. I don't know which API/Package fit my needs.

Anyone can give me an hint?

Thanks!

Stephane Routelous's picture
Stephane Routelous
Thu, 06/19/2008 - 18:25

I know the function from GeomLib, but it's only for curves : GeomLib::ExtendCurveToPoint

I will compute the intersections of the edges myself ( ex : BRepExtrema_DistShapeShape with creating a new edge to close the wire if no intersection ) and replace the old edges in the wire with the new ones with ShapeBuild_ReShape )

HTH,

Stephane

Cauchy Ding's picture
Cauchy Ding
Sun, 07/06/2008 - 05:29

If the edge is related with a face, extend the parameter curve(pcurve, 2d) of the edge, and calculate the 3d curve. Else extend the spatial curve(3d) directly.

Gheorghiu's picture
Gheorghiu
Fri, 02/13/2009 - 17:01

Hallo!

Can you please explain how can we extend a parameter curve(pcurve, 2d) of an edge? I only need to reach the face boundary wire? What function/class can we use?

Thank you!

Roman Lygin's picture
Roman Lygin
Fri, 03/06/2009 - 10:20

If you simply need to extend an edge's range along its underlying pcurve you can use BRep_Builder::Range() specifying a face containing a pcurve and a new range. Make sure you also update a 3D curve and other pcurves to preserve the "same range" property (read in this blog post about why it's important).

HTH.
Roman
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