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Fix the timestep jank threshold.

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This commit is contained in:
Paul Chote
2014-03-13 10:57:29 +13:00
committed by Matthias Mailänder
parent d5edbc2bc7
commit 7e9793fa90
1 changed files with 8 additions and 5 deletions
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13
OpenRA.Game/Game.cs
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@@ -74,9 +74,8 @@ namespace OpenRA
public static int NetFrameNumber { get { return orderManager.NetFrameNumber; } }
public static int LocalTick { get { return orderManager.LocalFrameNumber; } }
public const int NetTickScale = 3; // 120 ms net tick for 40 ms local tick
public const int MinTick = 1;
public const int MaxTick = 10;
public const int Timestep = 40;
public const int TimestepJankThreshold = 250; // Don't catch up for delays larger than 250ms
public static event Action<OrderManager> ConnectionStateChanged = _ => { };
static ConnectionState lastConnectionState = ConnectionState.PreConnecting;
@@ -181,9 +180,13 @@ namespace OpenRA
if (worldTimestep != 0 && worldTickDelta >= worldTimestep)
using (new PerfSample("tick_time"))
{
var relativeTickDelta = (worldTickDelta / worldTimestep) * worldTimestep;
var tickIntervall = relativeTickDelta > MinTick && relativeTickDelta < MaxTick ? MinTick : relativeTickDelta;
orderManager.LastTickTime += tickIntervall;
// Tick the world to advance the world time to match real time:
// If dt < TickJankThreshold then we should try and catch up by repeatedly ticking
// If dt >= TickJankThreshold then we should accept the jank and progress at the normal rate
// dt is rounded down to an integer tick count in order to preserve fractional tick components.
var integralTickTimestep = (worldTickDelta / worldTimestep) * worldTimestep;
orderManager.LastTickTime += integralTickTimestep >= TimestepJankThreshold ? integralTickTimestep : worldTimestep;
if (orderManager.GameStarted)
++Viewport.TicksSinceLastMove;