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Ran 31 Dec 2016 08:45PM UTC

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Build # 1238

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push

travis-ci

Committed by

web-flow

Commit Message

[#538] Implement a better seeded Random  (#731)

Closes #538 

## Changes:

- Implements a seeded random utility in Excalibur called `ex.Random` using the popular Mersenne-Twister algorithm documented [here](http://www.math.sci.hiroshima-u.ac.jp/~m-mat/MT/MT2002/emt19937ar.html) and [here](http://www.math.sci.hiroshima-u.ac.jp/~m-mat/MT/emt.html)
- Added new utilities for random
  * Random in range (`ex.Random.floating()`/`ex.Random.integer()`), 
  * Coin-tosses with variable outcomes `ex.Random.bool()`
  * Pick-one `ex.Random.pickOne(array)`
  * Pick-set `ex.Random.pickSet(array, numPicks, allowDuplicates = false)`
  * Random integer range generator `ex.Random.range(min, max, length)`
  * Dice roll helpers for d4, d6, d8, d10, d12, and d20
- Tests for the random features included

Additionally I have compared this implementation to the native C implementation done by the people who originally proposed the paper and it returns the same values for a seeded sequence as our implementation does. (downloaded and compiled locally using windows subsystem for linux).

Coverage Stats

5013 of 7094 relevant lines covered (70.67%)

344.85 hits per line

Coverage Regressions

Lines	Coverage	∆	File
1711	100.0		build/dist/excalibur.js

Jobs

ID	Job ID	Ran	Files	Coverage
1	1238.1	31 Dec 2016 08:45PM UTC	0	70.67	Travis Job 1238.1

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