Spiral, screw and so on

Does anybody knows how to create, for example, spiral or screw? I can't find way to do it. Thanks for your help!

fricaud yves's picture

Hello Anna;

It's possible to build a spiral with cascade. It's not difficult but it needs a good knowledge of the geometry and the topology in OCC. the principle is to build a line (L) 2d which describes the evolution of the Hight and the angle from the parameter of the line (w). x = H = Lx(w) , y = teta = Ly(w) We place this curve 2d in the parametric space of a cylinder. v = H; u = teta. we build the curve on surface defined by the line2d and the cylinder . C(w) = Cy(teta(w),H(w)); where Cy is the parametric equation of the cylinder.

the curve is now defined, after we make edge, face. and we can build the 3d definition of the curve.

regards

Yves

a-fedoruk's picture

Thank you, Yves! I'll try that way. You've help me very much!

PG's picture

HI

Its been long time .. were u able to create a spiral (2d curve)
and helical curve ( as described above)
thanks for the answer in advance
PG

Pawel's picture

I would also be interested in some hints.

Best regards
Pawel