Returns the cross product between the two vectors. Must be 3-dimensional. - Node.js Data Structure

Node.js examples for Data Structure:Vector

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Description

Returns the cross product between the two vectors. Must be 3-dimensional.

Demo Code

/* returns the cross product between the two vectors. Must be 3-dimensional. */
Array.prototype.cross = function(vec, vy, vz) {
  var x = this[0], y = this[1], z = this[2];
  var vx;/*from w w  w .j a  v a2  s  . com*/
  
  if (typeof(vec) == "object") { vx = vec[0]; vy = vec[1]; vz = vec[2]; }
  else { vx = vec; }
  
  if (this.equals(vec)) throw new Error("Vector <"+this+"> is equal to <"+vec+">; can't compute cross product");
  
  var result = [y*vz - z*vy, z*vx - x*vz, x*vy - y*vx];
  checkNaN(result);
  return result;
};

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