API Docs

Class: NURBSSurface

PD. NURBSSurface

Defines a 3D NURBS surface.

A NURBS surface is a simple class for generating surface points from a set of 3D spatially distributed control nodes.

new NURBSSurface(degree1, degree2, knots1, knots2, controlPoints)

Creates a 3D NURBS surface.

Parameters:
Name Type Description
degree1 number

The degree of the U-axis curve.
degree2 number

The degree of the V-axis curve.
knots1 Array.<number>

The knots in the U-axis.
knots2 Array.<number>

The knots in the V-axis.
controlPoints Array.<PD.Point>

The array of control nodes.
Author:
  • drajmarsh

Members

:Array.<PD.Point>

controlPoints

The array of control nodes.

Type
:number

degree1

The degree of the U-axis curve.

Type
  • number
:number

degree2

The degree of the V-axis curve.

Type
  • number
:Array.<number>

knots1

The knots in the U-axis.

Type
  • Array.<number>
:Array.<number>

knots2

The knots in the V-axis.

Type
  • Array.<number>

Methods

getPoint(t1, t2, target)

Retrieves a point on the NURBS surface.

Parameters:
Name Type Description
t1 number

The fraction along the U-axis of the surface (0.0 to 1.0).
t2 number

The fraction along the V-axis of the surface (0.0 to 1.0).
target THREE.Vector3

The vector to receive the NURBS surface position.

getPointAndNormal(t1, t2, target, normal)

Retrieves a point and surface normal on the NURBS surface.

This method uses finite differences to closely approximate the surface normal and tangent at the point.

Parameters:
Name Type Description
t1 number

The fraction along the U-axis of the surface (0.0 to 1.0).
t2 number

The fraction along the V-axis of the surface (0.0 to 1.0).
target THREE.Vector3

The vector to receive the NURBS surface position.
normal THREE.Vector3

The vector to receive the NURBS surface normal.