New Edit Point Curve Options

Knot Spacing

A “knot” is the parameter value at an edit point.

Chord – The chord length parameterizes the new curve edit points in current units. The chord length is the cumulative straight line distance between consecutive edit points. The starting point of the curve has the parameter 0.0, and the ending point has the parameter equal to the total chord length of the curve.

Uniform – The new curve edit points have integral parameters: the first edit point is parameter 0.0, the second is 1.0, and so on.

Curve Degree

The mathematical degree of the curve created, which control the number of CVs per span: 1 (linear), 2 (quadratic), 3 (cubic), 5 or 7. The default is 3.

Pivot Position

Specifies the initial position of the curve's pivot points (both rotation and scaling).

Origin – The pivot points are located at (0, 0, 0).

First CV – The pivot points are located at the position of the first CV, that is, the start of the curve. This is the default.

Last CV – The pivot points are located at the position of the last CV, that is, the end of the curve. The pivots position is re-calculated and displayed every time a new control point is placed.

Curve center – The pivot points are located in the middle of the curve, based on arc length. (This is the same position as Snap to Center in the Curve Snap Options box.) The pivots are placed at the first CV until there are enough CVs to form a span, and then are re-calculated and displayed every time a new span is created.

Bounding box center – The pivot points are located at the center of the curve's bounding box. The pivots position is re-calculated and displayed every time a new control point is placed.

Create Guidelines

Create vertical and horizontal guidelines at each point you create.