NURBS Curve Extremes

NURBS Curve Extremes#

Functionality#

This node searches for points on the curve, which are extreme points along the specified direction. For example, if specified direction is along Z axis, this node will search for points which have maximum or minimum Z coordinate.

This node is similar to “Curve Extremes” node, but has the following differences:

  • This node can work only with non-rational NURBS curves (i.e. NURBS curves which do not use weights) of degrees 1 (polyline), 2, 3 or 4.

  • This node can search for extremes only along some direction, not along arbitrary scalar field.

  • Thanks to these restrictions, this node works several times faster than “Curve Extremes”.

Inputs#

This node has the following inputs:

  • Curve. The curve to find extremes on. This input is mandatory.

  • Direction. Vector specifying the direction to find extremes along. The default value is (0, 0, 1) (Z axis).

Parameters#

This node has the following parameters:

  • Sign. This defines what kind of extreme points it is required to find. The available values are Min and Max. The default option is Max.

  • Global only. If checked, the node will search for global extremes only. Otherwise, it will search for global and local extreme points. Checked by default.

Outputs#

This node has the following outputs:

  • Point. Extreme point in 3D space.

  • T. Curve’s T parameter, corresponding to the extreme point.

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