static unsafe string MakeRandomFileName()
{
const int kFilenameLen = 16;
var filenameBuffer = stackalloc char[kFilenameLen];
var rng = new Mathematics.Random((uint)Time.realtimeSinceStartup);
for (int i = 0; i < kFilenameLen; ++i)
{
filenameBuffer[i] = rng.NextBool() ? (char)rng.NextInt('a', 'z') : (char)rng.NextInt('0', '9');
}
return(new string(filenameBuffer, 0, kFilenameLen));
}
public void Execute()
{
foreach (var newFlyby in New)
{
var positional = PositionalFromEntity[newFlyby];
var speed = positional.PrevDist - positional.CurrentDist;
speed /= Dt;
// Discard slow fly bys.
if (speed < Params.MinSpeed)
{
ECB.DestroyEntity(newFlyby);
continue;
}
bool isFast = speed > Params.Fast;
var intensity = (speed - Params.MinSpeed) / (Params.MaxSpeed - Params.MinSpeed);
var pitch = 0.5f + intensity * 0.5f;
var layerSpecificVolume = isFast ? Params.HighLayer : Params.LowLayer;
pitch *= (isFast ? Params.FastPitchMul : 1);
// allocate player.
var freeList = isFast ? HighFreeList : LowFreeList;
var otherList = !isFast ? HighFreeList : LowFreeList;
if (freeList.Length == 0)
{
// steal from other queue.
freeList = otherList;
if (freeList.Length == 0)
{
break;
}
}
int freeIndex = Rand.NextInt(freeList.Length - 1);
int playerIndex = freeList[freeIndex];
var sample = CurrentSamples[playerIndex];
var distanceAttenuation = Params.Volume * math.min(0.5f, 1 / math.sqrt(math.max(1, positional.CurrentDist - 3)));
//Debug.Log($"[{playerIndex}] Creating ({isFast}) player with speed {speed}, intensity {intensity}, distance {positional.CurrentDist}, attenuation {distanceAttenuation}, pitch {pitch}");
ECB.AddComponent(newFlyby,
new FlyByState
{
Timeout = sample.Length / pitch,
SampleIndex = playerIndex
}
);
//Debug.Log("Final volume: " + math.sqrt(intensity) * distanceAttenuation);
ECB.AddComponent(sample.PlayerEntity,
new SamplePlayback
{
Left = positional.Left,
Right = positional.Right,
Pitch = pitch,
Volume = layerSpecificVolume * math.min(1, math.sqrt(intensity)) * distanceAttenuation
}
);
freeList.RemoveAtSwapBack(freeIndex);
}
foreach (var deadFlyby in Dead)
{
//Debug.Log($"[{Dead.States[i].SampleIndex}] Dead player");
ECB.RemoveComponent(deadFlyby, ComponentType.ReadWrite <FlyByState>());
}
}