class matrix {
  var index:Array;
  var _n:Number;
  var _m:Number;
  function matrix(m, n) {
    _n = n;
    _m = m;
    index = new Array();
    for (var i = 0; i<m; i++) {
      index[i] = new Array(n);
      for (var j = 0; j<n; j++) {
        index[i][j] = 0;
      }
    }
  }
  function copy() {
    var temp = new matrix(_m, _n);
    for (var i = 0; i<_m; i++) {
      for (var j = 0; j<_n; j++) {
        temp.index[i][j] = index[i][j];
      }
    }
    return temp;
  }
  function copy1() {
    var temp = new matrix(4, 4);
    for (var i = 0; i<_m; i++) {
      temp.index[i] = this.index[i].slice();
      trace(temp.index[i]);
    }
    return temp;
  }
  function copy2() {
    var temp = new matrix(4, 4);
    for (var i = 0; i<_m; i++) {
      temp.index[i].push(this.index[i].slice());
      for (var j = 0; j<4; j++) {
        temp.index[i][j].shift();
      }
      trace(temp.index[i]);
    }
    return temp;
  }
  function identity(n) {
    for (var i = 0; i<_m; i++) {
      for (var j = 0; j<_n; j++) {
        if (i == j) {
          this.index[i][j] = n;
        }
      }
    }
  } <
  function toString() {
    var string = "[";
    for (var i = 0; i<_m; ++i) {
      for (var j = 0; j<_n; ++j) {
        var temp = index[i][j];
        if (j == _n-1) {
          string = string.concat(temp);
          if ((i+1)*(1+j)<_m*_n) {
            string = string+"]\r[";
          } else {
            string = string+"]";
          }
        } else {
          string = string+(temp+",");
        }
      }
    }
    return (string);
  }
  function reset() {
    this.__proto__.constructor.apply(this, arguments);
  }
  function addition(b) {
    var temp = new matrix(_m, _n);
    for (var i = 0; i<_m; i++) {
      for (var j = 0; j<_n; j++) {
        temp.index[i][j] = this.index[i][j]+b.index[i][j];       }
    }
    return temp;
  }
  function substract(b) { <BR /> <BR />
    var temp = new matrix(_m, _n); <BR /> <BR />
    for (var i = 0; i<_m; i++) { <BR /> <BR />
      for (var j = 0; j<_n; j++) { <BR /> <BR />
        temp.index[i][j] = this.index[i][j]-b.index[i][j]; <BR /> <BR />
      } <BR /> <BR />
    } <BR /> <BR />
    return temp; <BR /> <BR />
  } <BR /> <BR />
  function scalar(a) { <BR /> <BR />
    for (var i = 0; i<_m; i++) { <BR /> <BR />
      for (var j = 0; j<_n; j++) { <BR /> <BR />
        this.index[i][j] = this.index[i][j]*a; <BR /> <BR />
      } <BR /> <BR />
    } <BR /> <BR />
  } <BR /> <BR />
   <BR /> <BR />
   <BR /> <BR />
  function transpose(){ <BR /> <BR />
    var temp = new matrix(_n, _m); <BR /> <BR />
    for (var i = 0; i<_n; i++) { <BR /> <BR />
      for (var j = 0; j<_m; j++) { <BR /> <BR />
        temp.index[i][j] = this.index[j][i]; <BR /> <BR />
      } <BR /> <BR />
       <BR /> <BR />
    } <BR /> <BR />
    return temp <BR /> <BR />
     <BR /> <BR />
    } <BR /> <BR />
  function multiply4_1(b:matrix) { <BR /> <BR />
    var temp = new matrix(1, 4); <BR /> <BR />
    for (var i = 0; i<4; i++) { <BR /> <BR />
      for (var j = 0; j<4; j++) { <BR /> <BR />
        temp.index[0][i] += this.index[i][j]*b.index[0][j]; <BR /> <BR />
      } <BR /> <BR />
    } <BR /> <BR />
    return temp; <BR /> <BR />
  } <BR /> <BR />
  function translate3d(m, dx, dy, dz) { <BR /> <BR />
    this["index"][0][0] = 1; <BR /> <BR />
    this["index"][1][1] = 1; <BR /> <BR />
    this["index"][2][2] = 1; <BR /> <BR />
    this["index"][3][3] = 1; <BR /> <BR />
    this["index"][0][3] = dx; <BR /> <BR />
    this["index"][1][3] = dy; <BR /> <BR />
    this["index"][2][3] = dz; <BR /> <BR />
    var temp = this.multiply4_1(m); <BR /> <BR />
    return (temp); <BR /> <BR />
  } <BR /> <BR />
  function scale3d(b, dx, dy, dz) { <BR /> <BR />
    this.index[0][0] = dx; <BR /> <BR />
    this.index[1][1] = dy; <BR /> <BR />
    this.index[2][2] = dz; <BR /> <BR />
    this.index[3][3] = 1; <BR /> <BR />
    var temp = this.multiply4_1(b); <BR /> <BR />
    return (temp); <BR /> <BR />
  } <BR /> <BR />
  function dtor(theta) { <BR /> <BR />
    return Math.PI*theta/180; <BR /> <BR />
  } <BR /> <BR />
  function rotate3d_x(b, a) { <BR /> <BR />
    this.index[0][0] = 1; <BR /> <BR />
    this.index[1][1] = Math.cos(dtor(a)); <BR /> <BR />
    this.index[2][2] = Math.cos(dtor(a)); <BR /> <BR />
    this.index[1][2] = -1*(Math.sin(dtor(a))); <BR /> <BR />
    this.index[2][1] = Math.sin(dtor(a)); <BR /> <BR />
    this.index[3][3] = 1; <BR /> <BR />
    var temp = this.multiply4_1(b); <BR /> <BR />
    return (temp); <BR /> <BR />
  } <BR /> <BR />
  function rotate3d_z(b, a) { <BR /> <BR />
    this.index[0][0] = Math.cos(dtor(a)); <BR /> <BR />
    this.index[1][1] = Math.cos(dtor(a)); <BR /> <BR />
    this.index[2][2] = 1; <BR /> <BR />
    this.index[0][1] = -1*(Math.sin(dtor(a))); <BR /> <BR />
    this.index[1][0] = Math.sin(dtor(a)); <BR /> <BR />
    this.index[3][3] = 1; <BR /> <BR />
    var temp = this.multiply4_1(b); <BR /> <BR />
    return (temp); <BR /> <BR />
  } <BR /> <BR />
  function rotate3d_y(b, a) { <BR /> <BR />
    this.index[0][0] = Math.cos(dtor(a)); <BR /> <BR />
    this.index[1][1] = 1; <BR /> <BR />
    this.index[2][2] = Math.cos(dtor(a)); <BR /> <BR />
    this.index[2][0] = -1*(Math.sin(dtor(a))); <BR /> <BR />
    this.index[0][2] = Math.sin(dtor(a)); <BR /> <BR />
    this.index[3][3] = 1; <BR /> <BR />
    var temp = this.multiply4_1(b); <BR /> <BR />
    return (temp); <BR /> <BR />
  } <BR /> <BR />
} <BR /> <BR />