1 /**
  2  * @author mrdoob / http://mrdoob.com/
  3  */
  4 
  5 /**@constructor*/
  6 THREE.Rectangle = function () {
  7 
  8 	var _left = 0;
  9 	var _top = 0;
 10 	var _right = 0;
 11 	var _bottom = 0;
 12 	var _width = 0;
 13 	var _height = 0;
 14 	var _isEmpty = true;
 15 
 16 	function resize() {
 17 
 18 		_width = _right - _left;
 19 		_height = _bottom - _top;
 20 
 21 	}
 22 
 23 	this.getX = function () {
 24 
 25 		return _left;
 26 
 27 	};
 28 
 29 	this.getY = function () {
 30 
 31 		return _top;
 32 
 33 	};
 34 
 35 	this.getWidth = function () {
 36 
 37 		return _width;
 38 
 39 	};
 40 
 41 	this.getHeight = function () {
 42 
 43 		return _height;
 44 
 45 	};
 46 
 47 	this.getLeft = function() {
 48 
 49 		return _left;
 50 
 51 	};
 52 
 53 	this.getTop = function() {
 54 
 55 		return _top;
 56 
 57 	};
 58 
 59 	this.getRight = function() {
 60 
 61 		return _right;
 62 
 63 	};
 64 
 65 	this.getBottom = function() {
 66 
 67 		return _bottom;
 68 
 69 	};
 70 
 71 	this.set = function ( left, top, right, bottom ) {
 72 
 73 		_isEmpty = false;
 74 
 75 		_left = left; _top = top;
 76 		_right = right; _bottom = bottom;
 77 
 78 		resize();
 79 
 80 	};
 81 
 82 	this.addPoint = function ( x, y ) {
 83 
 84 		if ( _isEmpty === true ) {
 85 
 86 			_isEmpty = false;
 87 			_left = x; _top = y;
 88 			_right = x; _bottom = y;
 89 
 90 			resize();
 91 
 92 		} else {
 93 
 94 			_left = _left < x ? _left : x; // Math.min( _left, x );
 95 			_top = _top < y ? _top : y; // Math.min( _top, y );
 96 			_right = _right > x ? _right : x; // Math.max( _right, x );
 97 			_bottom = _bottom > y ? _bottom : y; // Math.max( _bottom, y );
 98 
 99 			resize();
100 		}
101 
102 	};
103 
104 	this.add3Points = function ( x1, y1, x2, y2, x3, y3 ) {
105 
106 		if ( _isEmpty === true ) {
107 
108 			_isEmpty = false;
109 			_left = x1 < x2 ? ( x1 < x3 ? x1 : x3 ) : ( x2 < x3 ? x2 : x3 );
110 			_top = y1 < y2 ? ( y1 < y3 ? y1 : y3 ) : ( y2 < y3 ? y2 : y3 );
111 			_right = x1 > x2 ? ( x1 > x3 ? x1 : x3 ) : ( x2 > x3 ? x2 : x3 );
112 			_bottom = y1 > y2 ? ( y1 > y3 ? y1 : y3 ) : ( y2 > y3 ? y2 : y3 );
113 
114 			resize();
115 
116 		} else {
117 
118 			_left = x1 < x2 ? ( x1 < x3 ? ( x1 < _left ? x1 : _left ) : ( x3 < _left ? x3 : _left ) ) : ( x2 < x3 ? ( x2 < _left ? x2 : _left ) : ( x3 < _left ? x3 : _left ) );
119 			_top = y1 < y2 ? ( y1 < y3 ? ( y1 < _top ? y1 : _top ) : ( y3 < _top ? y3 : _top ) ) : ( y2 < y3 ? ( y2 < _top ? y2 : _top ) : ( y3 < _top ? y3 : _top ) );
120 			_right = x1 > x2 ? ( x1 > x3 ? ( x1 > _right ? x1 : _right ) : ( x3 > _right ? x3 : _right ) ) : ( x2 > x3 ? ( x2 > _right ? x2 : _right ) : ( x3 > _right ? x3 : _right ) );
121 			_bottom = y1 > y2 ? ( y1 > y3 ? ( y1 > _bottom ? y1 : _bottom ) : ( y3 > _bottom ? y3 : _bottom ) ) : ( y2 > y3 ? ( y2 > _bottom ? y2 : _bottom ) : ( y3 > _bottom ? y3 : _bottom ) );
122 
123 			resize();
124 
125 		};
126 
127 	};
128 
129 	this.addRectangle = function ( r ) {
130 
131 		if ( _isEmpty === true ) {
132 
133 			_isEmpty = false;
134 			_left = r.getLeft(); _top = r.getTop();
135 			_right = r.getRight(); _bottom = r.getBottom();
136 
137 			resize();
138 
139 		} else {
140 
141 			_left = _left < r.getLeft() ? _left : r.getLeft(); // Math.min(_left, r.getLeft() );
142 			_top = _top < r.getTop() ? _top : r.getTop(); // Math.min(_top, r.getTop() );
143 			_right = _right > r.getRight() ? _right : r.getRight(); // Math.max(_right, r.getRight() );
144 			_bottom = _bottom > r.getBottom() ? _bottom : r.getBottom(); // Math.max(_bottom, r.getBottom() );
145 
146 			resize();
147 
148 		}
149 
150 	};
151 
152 	this.inflate = function ( v ) {
153 
154 		_left -= v; _top -= v;
155 		_right += v; _bottom += v;
156 
157 		resize();
158 
159 	};
160 
161 	this.minSelf = function ( r ) {
162 
163 		_left = _left > r.getLeft() ? _left : r.getLeft(); // Math.max( _left, r.getLeft() );
164 		_top = _top > r.getTop() ? _top : r.getTop(); // Math.max( _top, r.getTop() );
165 		_right = _right < r.getRight() ? _right : r.getRight(); // Math.min( _right, r.getRight() );
166 		_bottom = _bottom < r.getBottom() ? _bottom : r.getBottom(); // Math.min( _bottom, r.getBottom() );
167 
168 		resize();
169 
170 	};
171 
172 	this.intersects = function ( r ) {
173 
174 		// http://gamemath.com/2011/09/detecting-whether-two-boxes-overlap/
175 
176 		if ( _right < r.getLeft() ) return false;
177 		if ( _left > r.getRight() ) return false;
178 		if ( _bottom < r.getTop() ) return false;
179 		if ( _top > r.getBottom() ) return false;
180 
181 		return true;
182 
183 	};
184 
185 	this.empty = function () {
186 
187 		_isEmpty = true;
188 
189 		_left = 0; _top = 0;
190 		_right = 0; _bottom = 0;
191 
192 		resize();
193 
194 	};
195 
196 	this.isEmpty = function () {
197 
198 		return _isEmpty;
199 
200 	};
201 
202 };
203 

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