Sweep with a twist

[Tom Barnaby]

Hello forum.

I need to extrude a profile like a simple rectangle in x and y plane, along a path (e.g. from (0,0,0) to (0,0,50)). The problem is that I also need to rotate the profile while sweeping with a predefined angle. I could not find an example for that.

Thanks for your advice.

[Prashant Kande]

Hello Tom

Surfaces sample demonstrates building an extrusion of a (x,y) curve in z direction.

First, you need a procedure which builds a flat polygonal wire with straight edges at a z = z0 plane. FaceForm.BuildFace() (with a simple modification) shows building a wire like that. Let us suppose it looks like

Code: Select all

IBRepWire_DG BuildWire(double z){}

You just need to add another parameter like

Code: Select all

IBRepWire_DG BuildWire(double z, double twistAngle){}

and inside on start rotate the points you are using by the twistAngle.

With the wires for each z level constructed, you can build the extruded surfaces similar to SurfacesForm.CreateSurface() from the Surfaces sample.