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  <title>Qt 4.6: tetrixpiece.js Example File (script/qstetrix/tetrixpiece.js)</title>
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<pre> TetrixShape = {
     NoShape:0,
     ZShape:1,
     SShape:2,
     LineShape:3,
     TShape:4,
     SquareShape:5,
     LShape:6,
     MirroredLShape:7
 }

 TetrixCoordsTable = [
     [ [ 0,   0 ], [ 0,  0 ], [ 0,  0 ], [ 0,  0 ] ],
     [ [ 0,  -1 ], [ 0,  0 ], [ -1, 0 ], [ -1, 1 ] ],
     [ [ 0,  -1 ], [ 0,  0 ], [ 1,  0 ], [ 1,  1 ] ],
     [ [ 0,  -1 ], [ 0,  0 ], [ 0,  1 ], [ 0,  2 ] ],
     [ [ -1,  0 ], [ 0,  0 ], [ 1,  0 ], [ 0,  1 ] ],
     [ [ 0,   0 ], [ 1,  0 ], [ 0,  1 ], [ 1,  1 ] ],
     [ [ -1, -1 ], [ 0, -1 ], [ 0,  0 ], [ 0,  1 ] ],
     [ [ 1,  -1 ], [ 0, -1 ], [ 0,  0 ], [ 0,  1 ] ]
 ]

 function TetrixPiece()
 {
     this.shape = TetrixShape.NoShape;
 }

 TetrixPiece.prototype.__defineGetter__(
     &quot;shape&quot;,
     function() {
       return this._shape;
     }
 );

 TetrixPiece.prototype.__defineSetter__(
     &quot;shape&quot;,
     function(shape) {
       this._shape = shape;
       this._coords = new Array(4);
       for (var i = 0; i &lt; 4; ++i)
           this._coords[i] = TetrixCoordsTable[shape][i].slice();
     }
 );

 TetrixPiece.prototype.setRandomShape = function() {
     this.shape = Math.floor(((Math.random() * 100000) % 7) + 1);
 }

 TetrixPiece.prototype.getX = function(index) {
     return this._coords[index][0];
 }

 TetrixPiece.prototype.getY = function(index) {
     return this._coords[index][1];
 }

 TetrixPiece.prototype._setX = function(index, x) {
     this._coords[index][0] = x;
 }

 TetrixPiece.prototype._setY = function(index, y) {
     this._coords[index][1] = y;
 }

 TetrixPiece.prototype.__defineGetter__(
     &quot;minX&quot;,
     function() {
         var min = this._coords[0][0];
         for (var i = 1; i &lt; 4; ++i)
             min = Math.min(min, this._coords[i][0]);
         return min;
     }
 );

 TetrixPiece.prototype.__defineGetter__(
     &quot;maxX&quot;,
     function() {
         var max = this._coords[0][0];
         for (var i = 1; i &lt; 4; ++i)
             max = Math.max(max, this._coords[i][0]);
         return max;
     }
 );

 TetrixPiece.prototype.__defineGetter__(
     &quot;minY&quot;,
     function() {
       var min = this._coords[0][1];
       for (var i = 1; i &lt; 4; ++i)
           min = Math.min(min, this._coords[i][1]);
       return min;
     }
 );

 TetrixPiece.prototype.__defineGetter__(
     &quot;maxY&quot;,
     function() {
         var max = this._coords[0][1];
         for (var i = 1; i &lt; 4; ++i)
             max = Math.max(max, this._coords[i][1]);
         return max;
     }
 );

 TetrixPiece.prototype.rotatedLeft = function() {
     var result = new TetrixPiece();
     if (this._shape == TetrixShape.SquareShape) {
         result.shape = this._shape;
         return result;
     }
     result._shape = this._shape;
     for (var i = 0; i &lt; 4; ++i) {
         result._setX(i, this.getY(i));
         result._setY(i, -this.getX(i));
     }
     return result;
 }

 TetrixPiece.prototype.rotatedRight = function() {
     var result = new TetrixPiece();
     if (this._shape == TetrixShape.SquareShape) {
         result.shape = this._shape;
         return result;
     }
     result._shape = this._shape;
     for (var i = 0; i &lt; 4; ++i) {
         result._setX(i, -this.getY(i));
         result._setY(i, this.getX(i));
     }
     return result;
 }</pre>
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