181 lines
3.0 KiB
JavaScript
181 lines
3.0 KiB
JavaScript
import { Box3 } from './Box3.js';
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import { Vector3 } from './Vector3.js';
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/**
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* @author bhouston / http://clara.io
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* @author mrdoob / http://mrdoob.com/
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*/
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function Sphere( center, radius ) {
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this.center = ( center !== undefined ) ? center : new Vector3();
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this.radius = ( radius !== undefined ) ? radius : 0;
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}
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Object.assign( Sphere.prototype, {
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set: function ( center, radius ) {
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this.center.copy( center );
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this.radius = radius;
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return this;
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},
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setFromPoints: function () {
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var box = new Box3();
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return function setFromPoints( points, optionalCenter ) {
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var center = this.center;
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if ( optionalCenter !== undefined ) {
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center.copy( optionalCenter );
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} else {
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box.setFromPoints( points ).getCenter( center );
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}
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var maxRadiusSq = 0;
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for ( var i = 0, il = points.length; i < il; i ++ ) {
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maxRadiusSq = Math.max( maxRadiusSq, center.distanceToSquared( points[ i ] ) );
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}
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this.radius = Math.sqrt( maxRadiusSq );
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return this;
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};
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}(),
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clone: function () {
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return new this.constructor().copy( this );
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},
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copy: function ( sphere ) {
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this.center.copy( sphere.center );
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this.radius = sphere.radius;
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return this;
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},
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empty: function () {
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return ( this.radius <= 0 );
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},
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containsPoint: function ( point ) {
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return ( point.distanceToSquared( this.center ) <= ( this.radius * this.radius ) );
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},
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distanceToPoint: function ( point ) {
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return ( point.distanceTo( this.center ) - this.radius );
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},
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intersectsSphere: function ( sphere ) {
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var radiusSum = this.radius + sphere.radius;
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return sphere.center.distanceToSquared( this.center ) <= ( radiusSum * radiusSum );
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},
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intersectsBox: function ( box ) {
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return box.intersectsSphere( this );
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},
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intersectsPlane: function ( plane ) {
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return Math.abs( plane.distanceToPoint( this.center ) ) <= this.radius;
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},
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clampPoint: function ( point, target ) {
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var deltaLengthSq = this.center.distanceToSquared( point );
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if ( target === undefined ) {
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console.warn( 'THREE.Sphere: .clampPoint() target is now required' );
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target = new Vector3();
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}
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target.copy( point );
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if ( deltaLengthSq > ( this.radius * this.radius ) ) {
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target.sub( this.center ).normalize();
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target.multiplyScalar( this.radius ).add( this.center );
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}
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return target;
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},
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getBoundingBox: function ( target ) {
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if ( target === undefined ) {
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console.warn( 'THREE.Sphere: .getBoundingBox() target is now required' );
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target = new Box3();
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}
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target.set( this.center, this.center );
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target.expandByScalar( this.radius );
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return target;
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},
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applyMatrix4: function ( matrix ) {
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this.center.applyMatrix4( matrix );
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this.radius = this.radius * matrix.getMaxScaleOnAxis();
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return this;
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},
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translate: function ( offset ) {
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this.center.add( offset );
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return this;
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},
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equals: function ( sphere ) {
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return sphere.center.equals( this.center ) && ( sphere.radius === this.radius );
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}
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} );
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export { Sphere };
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