cdf/src/classes/Points.js

A library for creating oldschool demo-like animations with JavaScript

var utils = require('utils');

var Points = function() {
  this.push.apply(this, arguments);
};

Points.prototype = Object.create(Array.prototype);

Points.prototype.push = function(){
  var that = this;
  [].forEach.call(arguments, function(xyPair){
    if(!xyPair.forEach || xyPair[1] === undefined || !xyPair[0] === undefined )return;
    Array.prototype.push.call(that, [xyPair[0],xyPair[1]]);
  });
  return this;
}

Points.prototype.map = function(){
  var newP = new Points();
  [].push.apply(newP, Array.prototype.map.apply(this, arguments));
  return newP;
};

Points.prototype.rotate = function(rotInDeg, pivot){
  if(rotInDeg === undefined) return this;
  return this.map(function (pair) {
    return utils.coordRotate(pair, rotInDeg, pivot);
  });
};

Points.prototype.scale = function (xs, ys) {
  if(xs.length){ys = xs[1];xs=xs[0]}
  xs = xs || 1;
  ys = ys || xs;
  return this.map(function (pair) {
    return [pair[0]*(xs), pair[1]*(ys)];
  });
};

Points.prototype.translate = function(x, y){
  if(x.length){ y = x[1]; x = x[0];}
  return this.map(function (pair) {
    return [pair[0]+(x||0), pair[1]+(y||1)];
  });
};

module.exports = Points;