three.js/src/core/Vector4.js

/**
 * @author supereggbert / http://www.paulbrunt.co.uk/
 * @author philogb / http://blog.thejit.org/
 */

THREE.Vector4 = function ( x, y, z, w ) {

  this.x = x || 0;
  this.y = y || 0;
  this.z = z || 0;
  this.w = w || 1;

};

THREE.Vector4.prototype = {

  set: function ( x, y, z, w ) {

    this.x = x;
    this.y = y;
    this.z = z;
    this.w = w;

  },

  copy: function ( v ) {

    this.x = v.x;
    this.y = v.y;
    this.z = v.z;
    this.w = v.w;

  },

  add: function ( v1, v2 ) {

    this.x = v1.x + v2.x;
    this.y = v1.y + v2.y;
    this.z = v1.z + v2.z;
    this.w = v1.w + v2.w;

  },

  addSelf: function ( v ) {

    this.x += v.x;
    this.y += v.y;
    this.z += v.z;
    this.w += v.w;

  },

  sub: function ( v1, v2 ) {

    this.x = v1.x - v2.x;
    this.y = v1.y - v2.y;
    this.z = v1.z - v2.z;
    this.w = v1.w - v2.w;

  },

  subSelf: function ( v ) {

    this.x -= v.x;
    this.y -= v.y;
    this.z -= v.z;
    this.w -= v.w;

  },

  clone: function () {

    return new THREE.Vector4( this.x, this.y, this.z, this.w );

  },

  toString: function () {

    return 'THREE.Vector4 (' + this.x + ', ' + this.y + ', ' + this.z + ', ' + this.w + ')';

  }

};