User Guide

User Guide

User Guide

Extract Iso-parametric Lines

(3D only) Used to extract a B-spline curve(s) from a solid or a B-spline surface.

Tool Setting	Effect
Extract	Sets the objective of the tool. Single Curve — Extract a curve that has a constant parametric u-value (iso-u curve) or constant parametric v-value (iso-v curve). The u-value or v-value is the specified Iso Value. The u-direction is the direction in which the data points that defined each row were entered; the v-direction is the direction in which the columns were defined. Multiple Curves — Extract a set of curves that are spaced evenly on the surface in both directions.
Iso Value	(Extract set to Single Curve only) If on, sets the iso value of the extracted curve.
Numbers U/V	(Extract set to Multiple Curves only) Sets the number of curves to extract from both parametric u- and v- directions.
Ignore Trim Region(s)	(Extract set to Multiple Curves only) If on, the curves are trimmed by the B-spline trim curves, if any.

To construct a curve based on an iso-parametric line from a surface

Select the Extract Iso-parametric Lines tool.

In the tool settings, set Extract to Single Curve.

Identify the surface.
As you move the pointer, an iso-u curve displays dynamically.

Enter a data point to define the curve's position and create the iso-u curve.
or
Reset to display an iso-v curve.
As you move the pointer, an iso-v curve displays dynamically.

Enter a data point to define the curve's position and create the iso-v curve (or Reset to create no curve).


(1) Identify the surface. (2) Enter a second data point to position the iso curve.

To extract multiple curves from a surface

Select the Extract Iso-parametric Lines tool.

In the tool settings, set Extract to Multiple Curves.

Identify the surface.

Accept the surface.
The curves are generated.


Left: Original surface. Right: Surface with 10 extracted iso-parametric lines in both directions.

Key-in: EXTRACT ISOLINE