Poorly parameterized objects may not intersect and trim properly when combined with other objects. “Poorly parameterized” means the curve’s domain or the surface’s u or v spaces are tiny or huge compared to the size of the object.
When curves and surfaces are parameterized with a [0,1] domain, both the accuracy and the precision of geometric calculations like intersections and closest points are reduced, sometimes dramatically. Ideally the domain of a curve is close to it’s length and the domains of a surface is close to is average breadth in the appropriate direction.
We try to have parameterization match the length of a curve or some measure of the width of the surface. Derivative information is better if we do it this way.
If you need normalized parameters, for some calculation, etc., then use the methods on
Interval for converting from “regular” parameters to normalized, and vice versa. These are simple math calculations, and a far better approach than re-parameterizing curves and surfaces.
GeometryEquals issue, this has been fixed. See the link to the issue above for details.