SystemEx.Random.Isaac32Engine Class Reference

Represents the ISAAC 32-bit random number generator. More...

Public Member Functions
	Isaac32Engine (uint a=0, uint b=0, uint c=0)
	Initializes a new instance of the Isaac32Engine class with the specified seed values.
void	Seed (uint a, uint b, uint c, uint[]? s=null)
	Seeds the random number generator with the specified values.
uint	Next ()
	Generates the next random number in the sequence.

Detailed Description

Represents the ISAAC 32-bit random number generator.

Constructor & Destructor Documentation

Isaac32Engine()

SystemEx.Random.Isaac32Engine.Isaac32Engine	(	uint	a = 0,
		uint	b = 0,
		uint	c = 0 )

Initializes a new instance of the Isaac32Engine class with the specified seed values.

Parameters

a	The first seed value.
b	The second seed value.
c	The third seed value.

                                                              {
            Seed(a, b, c, null);
        }

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Member Function Documentation

Next()

uint SystemEx.Random.Isaac32Engine.Next

(

)

Generates the next random number in the sequence.

Returns

The next random number.

                            {
            if ( _cnt == 0 ) {
                Isaac();
                _cnt = Size - 1;
                return _rsl[_cnt];
            }
 
            return _rsl[_cnt--];
        }

Seed()

void SystemEx.Random.Isaac32Engine.Seed	(	uint	a,
		uint	b,
		uint	c,
		uint?[]	s = null )

Seeds the random number generator with the specified values.

Parameters

a	The first seed value.
b	The second seed value.
c	The third seed value.
s	The seed array, or null to use default values.

                                                                    {
            uint aa, bb, cc, dd, ee, ff, gg, hh;
            aa = bb = cc = dd = ee = ff = gg = hh = GoldenRatio;
 
            // Seed‑Array oder Null → wie bei dir m_rsl
            for ( int i = 0 ; i < Size ; i++ )
                _rsl[i] = s != null ? s[i] : 0;
 
            _a = a;
            _b = b;
            _c = c;
 
            Shuffle(ref aa, ref bb, ref cc, ref dd, ref ee, ref ff, ref gg, ref hh);
            Shuffle(ref aa, ref bb, ref cc, ref dd, ref ee, ref ff, ref gg, ref hh);
            Shuffle(ref aa, ref bb, ref cc, ref dd, ref ee, ref ff, ref gg, ref hh);
            Shuffle(ref aa, ref bb, ref cc, ref dd, ref ee, ref ff, ref gg, ref hh);
 
            for ( int i = 0 ; i < Size ; i += 8 ) {
                aa += _rsl[i + 0]; bb += _rsl[i + 1]; cc += _rsl[i + 2]; dd += _rsl[i + 3];
                ee += _rsl[i + 4]; ff += _rsl[i + 5]; gg += _rsl[i + 6]; hh += _rsl[i + 7];
 
                Shuffle(ref aa, ref bb, ref cc, ref dd, ref ee, ref ff, ref gg, ref hh);
 
                _mem[i + 0] = aa; _mem[i + 1] = bb; _mem[i + 2] = cc; _mem[i + 3] = dd;
                _mem[i + 4] = ee; _mem[i + 5] = ff; _mem[i + 6] = gg; _mem[i + 7] = hh;
            }
 
            for ( int i = 0 ; i < Size ; i += 8 ) {
                aa += _mem[i + 0]; bb += _mem[i + 1]; cc += _mem[i + 2]; dd += _mem[i + 3];
                ee += _mem[i + 4]; ff += _mem[i + 5]; gg += _mem[i + 6]; hh += _mem[i + 7];
 
                Shuffle(ref aa, ref bb, ref cc, ref dd, ref ee, ref ff, ref gg, ref hh);
 
                _mem[i + 0] = aa; _mem[i + 1] = bb; _mem[i + 2] = cc; _mem[i + 3] = dd;
                _mem[i + 4] = ee; _mem[i + 5] = ff; _mem[i + 6] = gg; _mem[i + 7] = hh;
            }
 
            Isaac();
            _cnt = Size - 1;
        }

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The documentation for this class was generated from the following file:

• Isaac32Engine.cs