Here are some results I got from the 3D Curve import. These spirals have 1000 imported points. I used the Archimedean spiral equation (polar) and then translated it into x,y,z coordinates. The equation is:
Radius = a * Angle ^ (1/n) where a and n are constants
n=1 is a Archimedes' spiral (what I used)
n=2 is a Fermat's spiral
n=-1 is a Hyperbolic spiral
n=-2 is a Lituus
(Refresher) To translate polar coordinates to cartesian (x,y,z) use the following equations:
x = radius * cos(angle)
y = radius * sin(angle)
The first one is just a flat spiral, the second is the same spiral with an incremental increase in the z direction.
I found that I could also successfully import 2000 points, but at 10000 and 5000 the ACIS and Parasolid Faceter failed (might be complexity or sheer number of points, not sure).
John Ohanian
IronCAD Development