Create Vector Class - Node.js Data Structure

Node.js examples for Data Structure:Vector

  1. HOME
  2. Node.js
  3. Data Structure
  4. Vector

Description

Create Vector Class

Demo Code

Vec2 = function (x, y) {
  this.x = x || 0;/*from   w  w  w. j  av a2 s .c o m*/
  this.y = y || 0;
};

Vec2.prototype.set = function(x, y) {
  this.x = x;
  this.y = y;
  return this;
};

Vec2.prototype.copy = function(vec) {
  this.x = vec.x;
  this.y = vec.y;
  return this;
};

Vec2.prototype.translate = function(x, y) {
  this.x += x;
  this.y += y;
  return this;
};

Vec2.prototype.scale = function(x, y) {
  this.x *= x;
  this.y *= y;
  return this;
};

Vec2.prototype.rotate = function(rads) {
  var c = Math.cos(rads);
  var s = Math.sin(rads);
  this.set(c*this.x-s*this.y, s*this.x+c*this.y);
  return this;
};

Vec2.prototype.normalize = function() {
  var mag = Math.sqrt(this.x*this.x + this.y*this.y);
  if (mag > 0) {
    this.x /= mag;
    this.y /= mag;
  }
  return this;
};

Related Tutorials