Chapter 577: NURBSSurface

Core Idea

This class represents a NURBS surface.

Implementation is based on (x, y [, z=0 [, w=1]]) control points with w=weight.

Key Concepts

• controlPoints : Array.<Array.<(Vector2|Vector3|Vector4)>>: An array holding arrays of control points.
• degree1 : number: The first NURBS degree.
• degree2 : number: The second NURBS degree.
• knots1 : Array.<number>: The first knots as a flat array of numbers.
• knots2 : Array.<number>: The second knots as a flat array of numbers.

Code Examples

import { NURBSSurface } from 'three/addons/curves/NURBSSurface.js';

• What it demonstrates: Typical usage of NURBSSurface.

Reference Tables

Constructor

Signature
`new NURBSSurface( degree1 : number, degree2 : number, knots1 : Array.<number>, knots2 : Array.<number>, controlPoints : Array.<Array.<(Vector2

Properties

Property	Description
`.controlPoints : Array.<Array.<(Vector2	Vector3
.degree1 : number	The first NURBS degree.
.degree2 : number	The second NURBS degree.
.knots1 : Array.<number>	The first knots as a flat array of numbers.
.knots2 : Array.<number>	The second knots as a flat array of numbers.

Methods

Method	Description
.getPoint( t1 : number, t2 : number, target : Vector3 )	This method returns a vector in 3D space for the given interpolation factor. This vector lies on the NURBS surface.

Key Takeaways

1. Most relevant properties: controlPoints, degree1, degree2, knots1.
2. Key methods: getPoint.

Connects To

• Source: examples/jsm/curves/NURBSSurface.js