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Line3.js
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Line3.js
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import { Vector3 } from './Vector3.js';
import { MathUtils } from './MathUtils.js';
/**
* @author bhouston / http:https://clara.io
*/
const _startP = new Vector3();
const _startEnd = new Vector3();
function Line3( start, end ) {
this.start = ( start !== undefined ) ? start : new Vector3();
this.end = ( end !== undefined ) ? end : new Vector3();
}
Object.assign( Line3.prototype, {
set: function ( start, end ) {
this.start.copy( start );
this.end.copy( end );
return this;
},
clone: function () {
return new this.constructor().copy( this );
},
copy: function ( line ) {
this.start.copy( line.start );
this.end.copy( line.end );
return this;
},
getCenter: function ( target ) {
if ( target === undefined ) {
console.warn( 'THREE.Line3: .getCenter() target is now required' );
target = new Vector3();
}
return target.addVectors( this.start, this.end ).multiplyScalar( 0.5 );
},
delta: function ( target ) {
if ( target === undefined ) {
console.warn( 'THREE.Line3: .delta() target is now required' );
target = new Vector3();
}
return target.subVectors( this.end, this.start );
},
distanceSq: function () {
return this.start.distanceToSquared( this.end );
},
distance: function () {
return this.start.distanceTo( this.end );
},
at: function ( t, target ) {
if ( target === undefined ) {
console.warn( 'THREE.Line3: .at() target is now required' );
target = new Vector3();
}
return this.delta( target ).multiplyScalar( t ).add( this.start );
},
closestPointToPointParameter: function ( 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: function ( point, clampToLine, target ) {
const t = this.closestPointToPointParameter( point, clampToLine );
if ( target === undefined ) {
console.warn( 'THREE.Line3: .closestPointToPoint() target is now required' );
target = new Vector3();
}
return this.delta( target ).multiplyScalar( t ).add( this.start );
},
applyMatrix4: function ( matrix ) {
this.start.applyMatrix4( matrix );
this.end.applyMatrix4( matrix );
return this;
},
equals: function ( line ) {
return line.start.equals( this.start ) && line.end.equals( this.end );
}
} );
export { Line3 };