91 lines
1.5 KiB
JavaScript
91 lines
1.5 KiB
JavaScript
import { Vector2 } from '../../math/Vector2.js';
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import { Curve } from '../core/Curve.js';
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function LineCurve( v1, v2 ) {
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Curve.call( this );
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this.type = 'LineCurve';
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this.v1 = v1 || new Vector2();
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this.v2 = v2 || new Vector2();
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}
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LineCurve.prototype = Object.create( Curve.prototype );
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LineCurve.prototype.constructor = LineCurve;
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LineCurve.prototype.isLineCurve = true;
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LineCurve.prototype.getPoint = function ( t, optionalTarget ) {
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var point = optionalTarget || new Vector2();
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if ( t === 1 ) {
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point.copy( this.v2 );
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} else {
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point.copy( this.v2 ).sub( this.v1 );
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point.multiplyScalar( t ).add( this.v1 );
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}
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return point;
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};
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// Line curve is linear, so we can overwrite default getPointAt
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LineCurve.prototype.getPointAt = function ( u, optionalTarget ) {
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return this.getPoint( u, optionalTarget );
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};
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LineCurve.prototype.getTangent = function ( /* t */ ) {
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var tangent = this.v2.clone().sub( this.v1 );
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return tangent.normalize();
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};
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LineCurve.prototype.copy = function ( source ) {
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Curve.prototype.copy.call( this, source );
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this.v1.copy( source.v1 );
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this.v2.copy( source.v2 );
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return this;
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};
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LineCurve.prototype.toJSON = function () {
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var data = Curve.prototype.toJSON.call( this );
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data.v1 = this.v1.toArray();
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data.v2 = this.v2.toArray();
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return data;
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};
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LineCurve.prototype.fromJSON = function ( json ) {
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Curve.prototype.fromJSON.call( this, json );
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this.v1.fromArray( json.v1 );
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this.v2.fromArray( json.v2 );
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return this;
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};
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export { LineCurve };
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