public long Evaluate(
EnemyObjectExpressionInfo enemyObjectExpressionInfo, // nullable
long playerXMillis,
long playerYMillis,
long elapsedMillisecondsPerIteration,
IDTDeterministicRandom rng)
{
long randomExclusiveBound = this.operand.Evaluate(
enemyObjectExpressionInfo: enemyObjectExpressionInfo,
playerXMillis: playerXMillis,
playerYMillis: playerYMillis,
elapsedMillisecondsPerIteration: elapsedMillisecondsPerIteration,
rng: rng);
if (randomExclusiveBound <= 0)
{
throw new Exception();
}
long randomByte1 = rng.NextInt(128);
long randomByte2 = rng.NextInt(256);
long randomByte3 = rng.NextInt(256);
long randomByte4 = rng.NextInt(256);
long randomByte5 = rng.NextInt(256);
long randomByte6 = rng.NextInt(256);
long randomByte7 = rng.NextInt(256);
long randomByte8 = rng.NextInt(256);
long randomLong =
(randomByte1 << 56)
| (randomByte2 << 48)
| (randomByte3 << 40)
| (randomByte4 << 32)
| (randomByte5 << 24)
| (randomByte6 << 16)
| (randomByte7 << 8)
| (randomByte8);
if (randomLong < 0)
{
randomLong = unchecked (-randomLong);
}
if (randomLong < 0)
{
randomLong = 0;
}
if (randomExclusiveBound == 1)
{
return(0);
}
// Note that this isn't perfectly uniform for large values of randomExclusiveBound
// but it'll decent enough for now.
long randomVal = randomLong % randomExclusiveBound;
return(randomVal);
}
