| import { Vector2 } from '../../math/Vector2.js'; |
| import { Curve } from '../core/Curve.js'; |
|
|
| class LineCurve extends Curve { |
|
|
| constructor( v1 = new Vector2(), v2 = new Vector2() ) { |
|
|
| super(); |
|
|
| this.isLineCurve = true; |
|
|
| this.type = 'LineCurve'; |
|
|
| this.v1 = v1; |
| this.v2 = v2; |
|
|
| } |
|
|
| getPoint( t, optionalTarget = new Vector2() ) { |
|
|
| const point = optionalTarget; |
|
|
| if ( t === 1 ) { |
|
|
| point.copy( this.v2 ); |
|
|
| } else { |
|
|
| point.copy( this.v2 ).sub( this.v1 ); |
| point.multiplyScalar( t ).add( this.v1 ); |
|
|
| } |
|
|
| return point; |
|
|
| } |
|
|
| |
| getPointAt( u, optionalTarget ) { |
|
|
| return this.getPoint( u, optionalTarget ); |
|
|
| } |
|
|
| getTangent( t, optionalTarget = new Vector2() ) { |
|
|
| return optionalTarget.subVectors( this.v2, this.v1 ).normalize(); |
|
|
| } |
|
|
| getTangentAt( u, optionalTarget ) { |
|
|
| return this.getTangent( u, optionalTarget ); |
|
|
| } |
|
|
| copy( source ) { |
|
|
| super.copy( source ); |
|
|
| this.v1.copy( source.v1 ); |
| this.v2.copy( source.v2 ); |
|
|
| return this; |
|
|
| } |
|
|
| toJSON() { |
|
|
| const data = super.toJSON(); |
|
|
| data.v1 = this.v1.toArray(); |
| data.v2 = this.v2.toArray(); |
|
|
| return data; |
|
|
| } |
|
|
| fromJSON( json ) { |
|
|
| super.fromJSON( json ); |
|
|
| this.v1.fromArray( json.v1 ); |
| this.v2.fromArray( json.v2 ); |
|
|
| return this; |
|
|
| } |
|
|
| } |
|
|
| export { LineCurve }; |
|
|
