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import { Vector3 } from './Vector3.js';
import { _Math } from './Math.js';
/**
* @author bhouston / http://clara.io
*/
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 () {
var startP = new Vector3();
var startEnd = new Vector3();
return function closestPointToPointParameter( point, clampToLine ) {
startP.subVectors( point, this.start );
startEnd.subVectors( this.end, this.start );
var startEnd2 = startEnd.dot( startEnd );
var startEnd_startP = startEnd.dot( startP );
var t = startEnd_startP / startEnd2;
if ( clampToLine ) {
t = _Math.clamp( t, 0, 1 );
}
return t;
};
}(),
closestPointToPoint: function ( point, clampToLine, target ) {
var 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 };
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