API Reference › core-geometry› Bspline

Bspline

A bspline curve or surface is used for curved freeform geometry defined by controls points (sometimes called poles).

  • BSplineCurve -- a curve defined by control points (which are not on the curve)
  • InterpolationCurve -- a curve defined by passthrough points, with "good" visual properties
  • BSplineSurfaceXYZ -- a surface with XYZ
  • BsplineSurfaceXYZW -- a surface with weighted (rational) XYZ coordinates
  • KnotVector -- vector of breakpoints in bspline definitions.

Classes

Name Description  
AkimaCurve3d Interpolating curve.  
AkimaCurve3dOptions fitPoints and end condition data for AkimaCurve3d  
Bezier1dNd Shared implementation details for derived bezier curve classes  
BezierCurve3d 3d Bezier curve class.  
BezierCurve3dH 3d curve with homogeneous weights.  
BezierCurveBase Base class for CurvePrimitive (necessarily 3D) with _polygon.  
BSpline1dNd Bspline knots and poles for 1d-to-Nd.  
BSpline2dNd Bspline knots and poles for 2d-to-Nd.  
BSplineCurve3d A BSplineCurve3d is a bspline curve whose poles are Point3d.  
BSplineCurve3dBase Base class for BSplineCurve3d and BSplineCurve3dH.  
BSplineCurveOps A class with static methods for creating B-spline curves.  
BSplineSurface3d BSplineSurface3d is a parametric surface in xyz space.  
BSplineSurface3dH BSpline Surface in xyzw homogeneous space  
InterpolationCurve3d Interpolating curve.  
InterpolationCurve3dOptions fitPoints and end condition data for InterpolationCurve3d  
KnotVector Array of non-decreasing numbers acting as a knot array for B-splines.  

Enumerations

Name Description  
BSplineWrapMode B-spline curve and surface types in this library are non-periodic.  
UVSelect UVSelect is an integer indicating uDirection (0) or vDirection (1) in a bspline surface parameterization.  
WeightStyle Enumeration of how weights are carried  

Interfaces

Name Description  
AkimaCurve3dProps fitPoints AkimaCurve3d  
BSplineSurface3dQuery Interface for methods supported by both regular (xyz) and weighted (xyzw) bspline surfaces.  
InterpolationCurve3dProps fitPoints and end condition data for InterpolationCurve3d  
PackedPointGrid interface for points returned from getPointGrid, with annotation of physical and weighting dimensions.  

Namespaces

Name Description  
BSplineCurveOps Namespace for collecting curve fit API  

Last Updated: 15 May, 2024