// A utility library for vector (coordinate) operations.

exports.mult = function(vec, scal){
  for (let i = 0; i < vec.length; i++)
    vec[i] = scal*vec[i];
  return vec;
}

function elem(orig, vec, op){
  let comb = [];
  for (let i = 0; i < orig.length; i++){
    comb.push(op(vec[i],orig[i]));
  }
  return comb;
}
exports.elem = elem;

exports.add = function(orig, vec){
  return elem(orig, vec, (a,b) => a+b);
}
exports.sub = function(orig, vec){
  return elem(orig, vec, (a,b) => a-b);
}
exports.dot = function(orig,vec){
  return elem(orig, vec, (a,b) => a*b);
}
exports.tileToChar = function(orig){
  return exports.dot(orig, [8,16]);
}