// Called during shutdown
void OnDestroy()
{
// Flag the program as shutting down, wait for the reader to exit, then free the Rust memory
running = false;
while (stateReaderThread.IsAlive)
{
}
FFIBridge.destroySim(sim);
}
// Function to be fun off of the main thread that will tight loop the fungine and collect the states back from it
private void StateReader()
{
sim = FFIBridge.newSim(boidCount);
Stopwatch stopWatch = new Stopwatch();
stopWatch.Start();
float timeStep = 0;
while (running)
{
// Check for player input
if (player != null)
{
FFIBridge.addMovement(sim, playerId, player.forwardSpeed, player.straffeSpeed, player.mouseInput);
}
// Step the engine forward once
UIntPtr result = FFIBridge.step(sim, timeStep);
Dictionary <UInt64, ReturnObj> newState = new Dictionary <UInt64, ReturnObj>();
UInt64 gathererCount;
if (Environment.ProcessorCount < 2)
{
gathererCount = 1;
}
else
{
gathererCount = (UInt64)Environment.ProcessorCount - 1;
}
var taskCount = (UInt64)result / gathererCount;
Task <Dictionary <UInt64, ReturnObj> >[] gatheredStates = new Task <Dictionary <UInt64, ReturnObj> > [gathererCount];
for (UInt64 i = 0; i < gathererCount; i++)
{
UInt64 start = (i * taskCount);
UInt64 end = (taskCount * (i + 1));
if (i == gathererCount - 1)
{
end = (uint)result;
}
gatheredStates[i] = Task.Run(() => stateGatherer(sim, start, end));
}
Task.WaitAll(gatheredStates);
newState = gatheredStates.Select(t => t.Result).SelectMany(dict => dict)
.ToDictionary(pair => pair.Key, pair => pair.Value);
states = newState;
engineSteps++;
long elaspsedTime = stopWatch.ElapsedMilliseconds;
if (elaspsedTime < 10)
{
Thread.Sleep((int)(10 - elaspsedTime));
}
timeStep = stopWatch.ElapsedMilliseconds / 1000.0f;
stopWatch.Restart();
}
UnityEngine.Debug.Log("Closing state reader thread...");
}
// Gather object states from the fungine
private Dictionary <UInt64, ReturnObj> stateGatherer(UIntPtr sim, UInt64 start, UInt64 end)
{
Dictionary <UInt64, ReturnObj> states = new Dictionary <UInt64, ReturnObj>();
for (UInt64 i = start; i < end; i++)
{
ReturnObj b = FFIBridge.getObj(sim, (UIntPtr)i);
states.Add(b.id, b);
}
return(states);
}
