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Fix RandomDataGenerator's randomness

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migiyubi 2018-03-01 19:57:16 +09:00 • committed by GitHub
parent 1f8d0c80f9
commit fc1181970b
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GPG key ID: 4AEE18F83AFDEB23
1 changed files with 17 additions and 3 deletions
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20
src/math/random-data-generator/RandomDataGenerator.js
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@ -67,6 +67,17 @@ var RandomDataGenerator = new Class({
*/
this.s2 = 0;
/**
* Internal var.
*
* @name Phaser.Math.RandomDataGenerator#n
* @type {number}
* @default 0
* @private
* @since 3.0.0
*/
this.n = 0;
/**
* [description]
*
@ -117,7 +128,7 @@ var RandomDataGenerator = new Class({
hash: function (data)
{
var h;
var n = 0xefc8249d;
var n = this.n;
data = data.toString();
@ -133,6 +144,8 @@ var RandomDataGenerator = new Class({
n += h * 0x100000000;// 2^32
}
this.n = n;
return (n >>> 0) * 2.3283064365386963e-10;// 2^-32
},
@ -169,9 +182,10 @@ var RandomDataGenerator = new Class({
sow: function (seeds)
{
// Always reset to default seed
this.n = 0xefc8249d;
this.s0 = this.hash(' ');
this.s1 = this.hash(this.s0);
this.s2 = this.hash(this.s1);
this.s1 = this.hash(' ');
this.s2 = this.hash(' ');
this.c = 1;
if (!seeds)