API Reference > geometry-core > Bspline > BSplineSurface3dH > create

create MethodStatic

Create a weighted bspline surface, with control points and weights each organized as flattened array of points continuing from one U row to the next.

  • This create variant takes control points in a "flattened" array, with points from succeeding U rows packed together in one array. Use createGrid if the points are in a deeper grid array structure.
  • knotArrayU and knotArrayV are optional -- uniform knots are implied if they are omitted (undefined).
  • When knots are given, two knot count conditions are recognized:
    • If poleArray.length + order == knotArray.length, the first and last are assumed to be the extraneous knots of classic clamping.
    • If poleArray.length + order == knotArray.length + 2, the knots are in modern form that does not have the classic unused first and last knot.

create(controlPointArray: Point3d[], weightArray: number[], numPolesU: number, orderU: number, knotArrayU: number[] | undefined, numPolesV: number, orderV: number, knotArrayV: number[] | undefined): BSplineSurface3dH | undefined

Parameter Type Description
controlPointArray Point3d[] Array of points, ordered along the U direction.
weightArray number[] array of weights, ordered along the U direction.
numPolesU number  
orderU number order for the U direction polynomial (order is one more than the degree. "cubic" polynomial is order 4.)
knotArrayU number[] | undefined  
numPolesV number  
orderV number order for the V direction polynomial (order is one more than the degree. "cubic" polynomial is order 4.)
knotArrayV number[] | undefined  

Returns - BSplineSurface3dH | undefined

Defined in

Last Updated: 13 June, 2024