/// <summary>
/// Resolve the returned promise once the predicate evalutes to true
/// </summary>
public IPromise WaitUntil(Func <TimeData, bool> predicate)
{
var promise = new Promise();
var wait = new PredicateWait()
{
timeStarted = curTime,
pendingPromise = promise,
timeData = new TimeData(),
predicate = predicate
};
waiting.Add(wait);
return(promise);
}
/// <summary>
/// Resolve the returned promise once the predicate evalutes to true
/// </summary>
public IPromise WaitUntil(Func <TimeData, bool> predicate)
{
Promise promise = new Promise();
PredicateWait wait = new PredicateWait {
timeStarted = curTime,
pendingPromise = promise,
timeData = new TimeData(),
predicate = predicate,
frameStarted = curFrame
};
waiting.AddLast(wait);
return(promise);
}
/// <summary>
/// Update all pending promises. Must be called for the promises to progress and resolve at all.
/// </summary>
public void Update(float deltaTime)
{
curTime += deltaTime;
curFrame += 1;
LinkedListNode <PredicateWait> node = waiting.First;
while (node != null)
{
PredicateWait wait = node.Value;
float newElapsedTime = curTime - wait.timeStarted;
wait.timeData.deltaTime = newElapsedTime - wait.timeData.elapsedTime;
wait.timeData.elapsedTime = newElapsedTime;
int newElapsedUpdates = curFrame - wait.frameStarted;
wait.timeData.elapsedUpdates = newElapsedUpdates;
bool result;
try {
result = wait.predicate(wait.timeData);
}
catch (Exception ex) {
wait.pendingPromise.Reject(ex);
node = RemoveNode(node);
continue;
}
if (result)
{
wait.pendingPromise.Resolve();
node = RemoveNode(node);
}
else
{
node = node.Next;
}
}
}
/// <summary>
/// Resolve the returned promise once the predicate evalutes to true
/// </summary>
public IPromise WaitUntil(Func<TimeData, bool> predicate)
{
var promise = new Promise();
var wait = new PredicateWait()
{
timeStarted = curTime,
pendingPromise = promise,
timeData = new TimeData(),
predicate = predicate
};
waiting.Add(wait);
return promise;
}