| import { Vector3 } from './Vector3.js'; |
| import * as MathUtils from './MathUtils.js'; |
|
|
| const _startP = new Vector3(); |
| const _startEnd = new Vector3(); |
|
|
| class Line3 { |
|
|
| constructor( start = new Vector3(), end = new Vector3() ) { |
|
|
| this.start = start; |
| this.end = end; |
|
|
| } |
|
|
| set( start, end ) { |
|
|
| this.start.copy( start ); |
| this.end.copy( end ); |
|
|
| return this; |
|
|
| } |
|
|
| copy( line ) { |
|
|
| this.start.copy( line.start ); |
| this.end.copy( line.end ); |
|
|
| return this; |
|
|
| } |
|
|
| getCenter( target ) { |
|
|
| return target.addVectors( this.start, this.end ).multiplyScalar( 0.5 ); |
|
|
| } |
|
|
| delta( target ) { |
|
|
| return target.subVectors( this.end, this.start ); |
|
|
| } |
|
|
| distanceSq() { |
|
|
| return this.start.distanceToSquared( this.end ); |
|
|
| } |
|
|
| distance() { |
|
|
| return this.start.distanceTo( this.end ); |
|
|
| } |
|
|
| at( t, target ) { |
|
|
| return this.delta( target ).multiplyScalar( t ).add( this.start ); |
|
|
| } |
|
|
| closestPointToPointParameter( point, clampToLine ) { |
|
|
| _startP.subVectors( point, this.start ); |
| _startEnd.subVectors( this.end, this.start ); |
|
|
| const startEnd2 = _startEnd.dot( _startEnd ); |
| const startEnd_startP = _startEnd.dot( _startP ); |
|
|
| let t = startEnd_startP / startEnd2; |
|
|
| if ( clampToLine ) { |
|
|
| t = MathUtils.clamp( t, 0, 1 ); |
|
|
| } |
|
|
| return t; |
|
|
| } |
|
|
| closestPointToPoint( point, clampToLine, target ) { |
|
|
| const t = this.closestPointToPointParameter( point, clampToLine ); |
|
|
| return this.delta( target ).multiplyScalar( t ).add( this.start ); |
|
|
| } |
|
|
| applyMatrix4( matrix ) { |
|
|
| this.start.applyMatrix4( matrix ); |
| this.end.applyMatrix4( matrix ); |
|
|
| return this; |
|
|
| } |
|
|
| equals( line ) { |
|
|
| return line.start.equals( this.start ) && line.end.equals( this.end ); |
|
|
| } |
|
|
| clone() { |
|
|
| return new this.constructor().copy( this ); |
|
|
| } |
|
|
| } |
|
|
| export { Line3 }; |
|
|
