An EllipticalArc2d is a section of an Ellipse2d with a start and end point. This module includes functionality for

• Constructing an elliptical arc from its center or end points
• Scaling, rotating, translating and mirroring elliptical arcs
• Evaluating points and derivative vectors along elliptical arcs
• Forming arc length parameterizations of elliptical arcs

The startAngle and sweptAngle values referred to below are not actually proper angles but instead refer to values of the ellipse parameter. However, in simple cases you don't need to worry about the difference - if startAngle and sweptAngle are both multiples of 90 degrees, then you can treat them as actual angles and everything will behave as you expect.

Constructors

Properties

Evaluation

Transformations

Coordinate conversions

Arc length parameterization

Low level

An ArcLengthParameterized value is a combination of an ArcLengthParameterization and an underlying EllipticalArc2d. If you need to do something fancy, you can extract these two values separately.

Differentiation

You are unlikely to need to use these functions directly, but they are useful if you are writing low-level geometric algorithms.