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Fix delta time calculation

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This commit is contained in:
Andras Schmelczer 2023-07-15 13:29:06 +01:00
parent bde0ad8f25
commit 379ee14739
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GPG key ID: FC8F2C3D3D1A718C
2 changed files with 36 additions and 33 deletions
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65
backend/src/game-server.ts
View file

@ -143,39 +143,40 @@ export class GameServer extends CommandReceiver {
private timeSinceLastPointUpdate = 0;
private handlePhysics() {
const delta = this.deltaTimeCalculator.getNextDeltaTimeInSeconds();
if (delta > settings.targetPhysicsDeltaTimeInSeconds) {
this.deltaTimeCalculator.getNextDeltaTimeInSeconds(true);
const delta = this.deltaTimeCalculator.getNextDeltaTimeInSeconds({ setAsBase: true });
this.deltaTimes.push(delta);
this.handleStats();
this.handleStats();
if ((this.timeSinceLastServerStateUpdate += delta) > 4) {
this.timeSinceLastServerStateUpdate = 0;
this.sendServerStateUpdate();
}
if ((this.timeSinceLastPointUpdate += delta) > 0.5) {
this.timeSinceLastPointUpdate = 0;
this.players.queueCommandForEachClient(
new UpdateGameState(this.declaPoints, this.redPoints, this.options.scoreLimit),
);
}
let scaledDelta = delta;
if (this.isInEndGame) {
this.timeScaling *= Math.pow(settings.endGameDeltaScaling, delta);
scaledDelta /= this.timeScaling;
}
this.objects.handleCommand(new StepCommand(scaledDelta, this));
this.players.step(scaledDelta);
this.players.stepCommunication(delta);
this.objects.resetRemoteCalls();
this.deltaTimes.push(this.deltaTimeCalculator.getNextDeltaTimeInSeconds());
if ((this.timeSinceLastServerStateUpdate += delta) > 4) {
this.timeSinceLastServerStateUpdate = 0;
this.sendServerStateUpdate();
}
setImmediate(this.handlePhysics.bind(this));
if ((this.timeSinceLastPointUpdate += delta) > 0.5) {
this.timeSinceLastPointUpdate = 0;
this.players.queueCommandForEachClient(
new UpdateGameState(this.declaPoints, this.redPoints, this.options.scoreLimit),
);
}
let scaledDelta = delta;
if (this.isInEndGame) {
this.timeScaling *= Math.pow(settings.endGameDeltaScaling, delta);
scaledDelta /= this.timeScaling;
}
this.objects.handleCommand(new StepCommand(scaledDelta, this));
this.players.step(scaledDelta);
this.players.stepCommunication(delta);
this.objects.resetRemoteCalls();
const physicsDelta = this.deltaTimeCalculator.getNextDeltaTimeInSeconds();
setTimeout(
this.handlePhysics.bind(this),
Math.max(0, settings.targetPhysicsDeltaTimeInSeconds - physicsDelta) * 1000,
);
}
private handleStats() {
@ -184,9 +185,9 @@ export class GameServer extends CommandReceiver {
if (this.deltaTimes.length > framesBetweenDeltaTimeCalculation) {
this.deltaTimes.sort((a, b) => a - b);
console.info(
`Median physics time: ${this.deltaTimes[
Math.floor(framesBetweenDeltaTimeCalculation / 2)
].toFixed(2)} ms`,
`Median physics time: ${(
this.deltaTimes[Math.floor(framesBetweenDeltaTimeCalculation / 2)] * 1000
).toFixed(2)} ms`,
);
console.info(
'Tail times: ',

4
backend/src/helper/delta-time-calculator.ts
View file

@ -1,7 +1,9 @@
export class DeltaTimeCalculator {
private previousTime: [number, number] = process.hrtime();
public getNextDeltaTimeInSeconds(setAsBase = false): number {
public getNextDeltaTimeInSeconds(
{ setAsBase = false }: { setAsBase: boolean } = { setAsBase: false },
): number {
const [seconds, nanoSeconds] = process.hrtime(this.previousTime);
if (setAsBase) {
this.previousTime = process.hrtime();