resenting the lower boundary of the box. * @param {Vector2} [max=(-Infinity,-Infinity)] - A vector representing the upper boundary of the box. */ constructor( min = new Vector2( + Infinity, + Infinity ), max = new Vector2( - Infinity, - Infinity ) ) { /** * This flag can be used for type testing. * * @type {boolean} * @readonly * @default true */ this.isBox2 = true; /** * The lower boundary of the box. * * @type {Vector2} */ this.min = min; /** * The upper boundary of the box. * * @type {Vector2} */ this.max = max; } /** * Sets the lower and upper boundaries of this box. * Please note that this method only copies the values from the given objects. * * @param {Vector2} min - The lower boundary of the box. * @param {Vector2} max - The upper boundary of the box. * @return {Box2} A reference to this bounding box. */ set( min, max ) { this.min.copy( min ); this.max.copy( max ); return this; } /** * Sets the upper and lower bounds of this box so it encloses the position data * in the given array. * * @param {Array} points - An array holding 2D position data as instances of {@link Vector2}. * @return {Box2} A reference to this bounding box. */ setFromPoints( points ) { this.makeEmpty(); for ( let i = 0, il = points.length; i < il; i ++ ) { this.expandByPoint( points[ i ] ); } return this; } /** * Centers this box on the given center vector and sets this box's width, height and * depth to the given size values. * * @param {Vector2} center - The center of the box. * @param {Vector2} size - The x and y dimensions of the box. * @return {Box2} A reference to this bounding box. */ setFromCenterAndSize( center, size ) { const halfSize = _vector$4.copy( size ).multiplyScalar( 0.5 ); this.min.copy( center ).sub( halfSize ); this.max.copy( center ).add( halfSize ); return this; } /** * Returns a new box with copied values from this instance. * * @return {Box2} A clone of this instance. */ clone() { return new this.constructor().copy( this ); } /** * Copies the values of the given box to this instance. * * @param {Box2} box - The box to copy. * @return {Box2} A reference to this bounding box. */ copy( box ) { this.min.copy( box.min ); this.max.copy( box.max ); return this; } /** * Makes this box empty which means in encloses a zero space in 2D. * * @return {Box2} A reference to this bounding box. */ makeEmpty() { this.min.x = this.min.y = + Infinity; this.max.x = this.max.y = - Infinity; return this; } /** * Returns true if this box includes zero points within its bounds. * Note that a box with equal lower and upper bounds still includes one * point, the one both bounds share. * * @return {boolean} Whether this box is empty or not. */ isEmpty() { // this is a more robust check for empty than ( volume <= 0 ) because volume can get positive with two negative axes return ( this.max.x < this.min.x ) || ( this.max.y < this.min.y ); } /** * Returns the center point of this box. * * @param {Vector2} target - The target vector that is used to store the method's result. * @return {Vector2} The center point. */ getCenter( target ) { return this.isEmpty() ? target.set( 0, 0 ) : target.addVectors( this.min, this.max ).multiplyScalar( 0.5 ); } /** * Returns the dimensions of this box. * * @param {Vector2} target - The target vector that is used to store the method's result. * @return {Vector2} The size. */ getSize( target ) { return this.isEmpty() ? target.set( 0, 0 ) : target.subVectors( this.max, this.min ); } /** * Expands the boundaries of this box to include the given point. * * @param {Vector2} point - The point that should be included by the bounding box. * @return {Box2} A reference to this bounding box. */ expandByPoint( point ) { this.min.min( point ); this.max.max( point ); return this; } /** * Expands this box equilaterally by the given vector. The width of this * box will be expanded by the x component of the vector in both * directions. The height of this box will be expanded by the y component of * the vector in both directions. * * @param {Vector2} vector - The vector that should expand the bounding box. * @return {Box2} A reference to this bounding box. */ expandByVector( vector ) { this.min.sub( vector ); this.max.add( vector ); return this; } /** * Expands each dimension of the box by the given scalar. If negative, the * dimensions of the box will be contracted. * * @param {number} scalar - The scalar value that should expand the bounding box. * @return {Box2} A reference to this bounding box. */ expandByScalar( scalar ) { this.min.addScalar( - scalar ); this.max.addScalar( scalar ); return this; } /** * Return