var RandomXYZW = function (vec4, scale){ 
if (scale === undefined) { 
scale = 1; 
} 
vec4.x = (Math.random() * 2 - 1) * scale; 
vec4.y = (Math.random() * 2 - 1) * scale; 
vec4.z = (Math.random() * 2 - 1) * scale; 
vec4.w = (Math.random() * 2 - 1) * scale; 
return vec4; 
} 
; 
module.exports = RandomXYZW;