184 lines
3.7 KiB
JavaScript
184 lines
3.7 KiB
JavaScript
import { Vector2 } from '../../math/Vector2.js';
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import { CurvePath } from './CurvePath.js';
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import { EllipseCurve } from '../curves/EllipseCurve.js';
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import { SplineCurve } from '../curves/SplineCurve.js';
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import { CubicBezierCurve } from '../curves/CubicBezierCurve.js';
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import { QuadraticBezierCurve } from '../curves/QuadraticBezierCurve.js';
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import { LineCurve } from '../curves/LineCurve.js';
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/**
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* @author zz85 / http://www.lab4games.net/zz85/blog
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* Creates free form 2d path using series of points, lines or curves.
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**/
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function Path( points ) {
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CurvePath.call( this );
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this.type = 'Path';
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this.currentPoint = new Vector2();
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if ( points ) {
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this.setFromPoints( points );
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}
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}
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Path.prototype = Object.assign( Object.create( CurvePath.prototype ), {
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constructor: Path,
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setFromPoints: function ( points ) {
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this.moveTo( points[ 0 ].x, points[ 0 ].y );
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for ( var i = 1, l = points.length; i < l; i ++ ) {
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this.lineTo( points[ i ].x, points[ i ].y );
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}
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},
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moveTo: function ( x, y ) {
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this.currentPoint.set( x, y ); // TODO consider referencing vectors instead of copying?
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},
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lineTo: function ( x, y ) {
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var curve = new LineCurve( this.currentPoint.clone(), new Vector2( x, y ) );
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this.curves.push( curve );
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this.currentPoint.set( x, y );
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},
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quadraticCurveTo: function ( aCPx, aCPy, aX, aY ) {
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var curve = new QuadraticBezierCurve(
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this.currentPoint.clone(),
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new Vector2( aCPx, aCPy ),
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new Vector2( aX, aY )
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);
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this.curves.push( curve );
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this.currentPoint.set( aX, aY );
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},
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bezierCurveTo: function ( aCP1x, aCP1y, aCP2x, aCP2y, aX, aY ) {
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var curve = new CubicBezierCurve(
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this.currentPoint.clone(),
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new Vector2( aCP1x, aCP1y ),
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new Vector2( aCP2x, aCP2y ),
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new Vector2( aX, aY )
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);
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this.curves.push( curve );
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this.currentPoint.set( aX, aY );
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},
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splineThru: function ( pts /*Array of Vector*/ ) {
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var npts = [ this.currentPoint.clone() ].concat( pts );
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var curve = new SplineCurve( npts );
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this.curves.push( curve );
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this.currentPoint.copy( pts[ pts.length - 1 ] );
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},
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arc: function ( aX, aY, aRadius, aStartAngle, aEndAngle, aClockwise ) {
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var x0 = this.currentPoint.x;
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var y0 = this.currentPoint.y;
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this.absarc( aX + x0, aY + y0, aRadius,
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aStartAngle, aEndAngle, aClockwise );
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},
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absarc: function ( aX, aY, aRadius, aStartAngle, aEndAngle, aClockwise ) {
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this.absellipse( aX, aY, aRadius, aRadius, aStartAngle, aEndAngle, aClockwise );
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},
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ellipse: function ( aX, aY, xRadius, yRadius, aStartAngle, aEndAngle, aClockwise, aRotation ) {
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var x0 = this.currentPoint.x;
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var y0 = this.currentPoint.y;
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this.absellipse( aX + x0, aY + y0, xRadius, yRadius, aStartAngle, aEndAngle, aClockwise, aRotation );
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},
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absellipse: function ( aX, aY, xRadius, yRadius, aStartAngle, aEndAngle, aClockwise, aRotation ) {
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var curve = new EllipseCurve( aX, aY, xRadius, yRadius, aStartAngle, aEndAngle, aClockwise, aRotation );
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if ( this.curves.length > 0 ) {
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// if a previous curve is present, attempt to join
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var firstPoint = curve.getPoint( 0 );
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if ( ! firstPoint.equals( this.currentPoint ) ) {
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this.lineTo( firstPoint.x, firstPoint.y );
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}
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}
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this.curves.push( curve );
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var lastPoint = curve.getPoint( 1 );
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this.currentPoint.copy( lastPoint );
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},
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copy: function ( source ) {
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CurvePath.prototype.copy.call( this, source );
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this.currentPoint.copy( source.currentPoint );
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return this;
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},
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toJSON: function () {
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var data = CurvePath.prototype.toJSON.call( this );
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data.currentPoint = this.currentPoint.toArray();
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return data;
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},
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fromJSON: function ( json ) {
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CurvePath.prototype.fromJSON.call( this, json );
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this.currentPoint.fromArray( json.currentPoint );
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return this;
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}
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} );
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export { Path };
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