API Reference > geometry-core > Curve > ArcVectors ArcVectors Interface Compact vector form of an elliptic arc defined by center, vectors for angle coordinates 0 and 90 degrees, and sweep. See Arc3d for further details of the parameterization and meaning of the vectors. Properties Name Type Description center Point3d center point of arc. sweep AngleSweep angle swept by the subset of the complete arc. vector0 Vector3d vector to point at angle 0 in parameter space vector90 Vector3d vector to point at angle 90 degrees in parameter space Defined in curve/Arc3d.ts Line 39 Last Updated: 11 June, 2024