API Reference > core-geometry > Bspline > BSplineSurface3d > createGrid

createGrid MethodStatic

Create a bspline surface.

  • This create variant takes control points in a "grid" array, with the points from each grid row [rowIndex] being an independent array points[rowIndex][indexAlongRow][x,y,z]
  • 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.

createGrid(points: number[][][], orderU: number, knotArrayU: undefined | number[] | Float64Array, orderV: number, knotArrayV: undefined | number[] | Float64Array): undefined | BSplineSurface3d

Parameter Type Description
points number[][][]  
orderU number order for the U direction polynomial (order is one more than the degree. "cubic" polynomial is order 4.)
knotArrayU undefined | number[] | Float64Array  
orderV number order for the V direction polynomial (order is one more than the degree. "cubic" polynomial is order 4.)
knotArrayV undefined | number[] | Float64Array  

Returns - undefined | BSplineSurface3d

Defined in

Last Updated: 20 June, 2023