three.js/src/core/Rectangle.js

/**
 * @author mr.doob / http://mrdoob.com/
 */

THREE.Rectangle = function (x1, y1, x2, y2) {

	var _x1 = x1, _y1 = y1,
	_x2 = x2, _y2 = y2,
	_width = _x2 - _x1, _height = _y2 - _y1,
	_isEmpty = false;

	function resize() {
	
		_width = _x2 - _x1;
		_height = _y2 - _y1;
	}

	this.getX = function () {
	
		return _x1;
	}

	this.getY = function () {
	
		return _y1;
	}

	this.getWidth = function () {
	
		return _width;
	}
	
	this.getHeight = function () {
	
		return _height;
	}
	
	this.getX1 = function() {
	
		return _x1;
	}

	this.getY1 = function() {
	
		return _y1;
	}

	this.getX2 = function() {
	
		return _x2;
	}

	this.getY2 = function() {
	
		return _y2;
	}

	this.set = function (x1, y1, x2, y2) {
	
		_isEmpty = false;
		
		_x1 = x1; _y1 = y1;
		_x2 = x2; _y2 = y2;

		resize();
	}
	
	this.addPoint = function (x, y) {
	
		if (_isEmpty) {
			_isEmpty = false;
			_x1 = x; _y1 = y;
			_x2 = x; _y2 = y;
		} else {
			_x1 = Math.min(_x1, x);
			_y1 = Math.min(_y1, y);
			_x2 = Math.max(_x2, x);
			_y2 = Math.max(_y2, y);
		}
		
		resize();
	}
	
	this.addRectangle = function (r) {

		if (_isEmpty) {
			_isEmpty = false;
			_x1 = r.getX1(); _y1 = r.getY1();
			_x2 = r.getX2(); _y2 = r.getY2();
		} else {	
			_x1 = Math.min(_x1, r.getX1());
			_y1 = Math.min(_y1, r.getY1());
			_x2 = Math.max(_x2, r.getX2());
			_y2 = Math.max(_y2, r.getY2());
		}
		
		resize();
	}
	
	this.inflate = function (v) {
	
		_x1 -= v; _y1 -= v;
		_x2 += v; _y2 += v;
		
		resize();
	}

	this.minSelf = function(r) {
	
		_x1 = Math.max(_x1, r.getX1());
		_y1 = Math.max(_y1, r.getY1());
		_x2 = Math.min(_x2, r.getX2());
		_y2 = Math.min(_y2, r.getY2());
		
		resize();		
	}	
	
	/*
	this.containsPoint = function (x, y) {
	
		return x > _x1 && x < _x2 && y > _y1 && y < _y2;
	}
	*/
	
	this.instersects = function (r) {
	
		return Math.min(_x2, r.getX2()) - Math.max(_x1, r.getX1()) > 0 && Math.min(_y2, r.getY2()) - Math.max(_y1, r.getY1()) > 0;
	}
	
	this.empty = function () {
	
		_isEmpty = true;	
	
		_x1 = 0; _y1 = 0;
		_x2 = 0, _y2 = 0;

		resize();
	}
	
	this.toString = function () {
	
		return "THREE.Rectangle (x1: " + _x1 + ", y1: " + _y2 + ", x2: " + _x2 + ", y1: " + _y1 + ", width: " + _width + ", height: " + _height + ")";
	}
}