meteor-difficulty-algorithms

Difficulty progression algorithms for use in Meteor

Summary

This package provides a base class for calculating the current difficulty level based on past performance. It also provides two additional algorithms that extend the base class: Reno and Tahoe. These algorithms are based on the network protocol algorithms of the same name.

In order to use the algorithms, you have the following functionality to play with:

options()

start()

wrong()

step()

Examples

In the following code snippet, we will create a Reno Difficulty Algorithm and console log the result that happens if a user "gets all questions correct" or "succeeds in game actions" except for step 9 and 20.

var reno = new DifficultyAlgorithm.Reno();
reno.options( {
  threshold : 10,
  multipler : 2,
  additive : 1
} );
var difficulty = reno.start();
console.log( difficulty );

for ( var i = 0; i < 25; i++ ) {
  if ( i == 9 || i == 20 ) {
    reno.wrong();
  }

  difficulty = reno.step();
  console.log( difficulty );
}

Output:

1
1.5
2.25
3.375
5.0625
7.59375
11.390625
12.390625
13.390625
14.390625
8.1953125
9.1953125
10.1953125
11.1953125
12.1953125
13.1953125
14.1953125
15.1953125
16.1953125
17.1953125
18.1953125
10.09765625
11.09765625
12.09765625
13.09765625
14.09765625

In your game, you may want to make use of Math.floor to get an Integer value.

Tests

Run tests:

cd meteor
meteor test-packages ./