PRNG Linear Congruential Generator

PRNG Linear Congruential Generator

/**
  http://try.haxe.org/#7dB24
  http://en.wikipedia.org/wiki/Linear_congruential_generator
*/
class Test {
    // define the multiplier
    static var a : Int = 1140671485;
    // define the increment
    static var c : Int = 12820163;
    // define the modulo
    static var m : Int = 1<<24;
    // define the seed, just bash some number
    static var seed : Int = 21234;
    
    // generate random int from 0 to m
    static function random() : Int
    {
        seed = (a * seed + c) % m;
        return seed;
    }
    
    // generate random float from 0 to 1
    static function randomFloat() : Float
    {
        return random() / m;
    }
    
    static function randomTo(to : Int) : Int
    {
        return Std.int(randomFloat() * to);
    }
    
    static function randomRange(from : Int, to : Int) : Int
    {
        return from + randomTo(to - from);
    }
    
    static function main() {
        var count = 10;
        
        // test random()
        trace("random()");
        for(i in 0...count) trace(random());
        
        // test randomFloat()
        trace("randomFloat()");
        for(i in 0...count) trace(randomFloat());
        
        // test randomTo(100)
        trace("randomTo(100)");
        for(i in 0...count) trace(randomTo(100));
        
        // test randomRange(90, 100)
        trace("randomRange(90, 100)");
        for(i in 0...count) trace(randomRange(90, 100));
    }
}