private void InterpolatePlayerState(bool grabAngles)
{
float f;
int i;
var gamestate = CDataModel.GameState;
PlayerState outP = predictedPlayerState;
SnapShot prev = gamestate.snap;
SnapShot next = gamestate.nextSnap;
gamestate.snap.playerState.CopyTo(outP);
var cl = CDataModel.GameState.ClActive;
if (grabAngles)
{
UserCmd cmd;
int cmdNum = cl.cmdNum;
CDataModel.GameState.GetUserCmd(cmdNum, out cmd);
PMove.UpdateViewAngles(outP, cmd);
}
if (gamestate.nextFrameTeleport)
{
return;
}
if (next == null || next.serverTime <= prev.serverTime)
{
return;
}
f = (float)(gamestate.time - prev.serverTime) / (next.serverTime - prev.serverTime);
i = next.playerState.bobCycle;
if (i < prev.playerState.bobCycle)
{
i += 256;
}
outP.bobCycle = prev.playerState.bobCycle + (int)(f * (i - prev.playerState.bobCycle));
for (i = 0; i < 3; i++)
{
outP.origin[i] = prev.playerState.origin[i] * (int)(f * (next.playerState.origin[i] - prev.playerState.origin[i]));
if (!grabAngles)
{
outP.viewangles[i] = CUtils.LerpAngles(prev.playerState.viewangles[i], next.playerState.viewangles[i], f);
}
outP.velocity[i] = prev.playerState.velocity[i] + f * (next.playerState.velocity[i] - prev.playerState.velocity[i]);
}
}
private void PredictPlayerState()
{
int cmdNum, current;
PlayerState oldPlayerState;
bool moved;
UserCmd oldestCmd;
UserCmd latestCmd;
int stateIndex = 0, predictCmd = 0;
int numPredicted = 0, numPlayedBack = 0;
var gamestate = CDataModel.GameState;
gamestate.hyperspace = false;
if (!validPPS)
{
validPPS = true;
predictedPlayerState = gamestate.snap.playerState;
}
//如果是播回放，那么就复制移动，不做预测
if (gamestate.demoPlayback || (gamestate.snap.playerState.pmFlags & PMoveFlags.FOLLOW) != PMoveFlags.NONE)
{
InterpolatePlayerState(false);
return;
}
//非预测的本地移动会抓取最近的视角
if (CConstVar.NoPredict || CConstVar.SynchronousClients)
{
InterpolatePlayerState(true);
return;
}
pmove.playerState = predictedPlayerState;
if (pmove.playerState.pmType == PMoveType.DEAD)
{
// pmove.tracemask =
}
else
{
// pmove.tracemask
}
// if(gamestate.snap.playerState.persistant[3] == )
// pmove.noFootsteps = gamestate.dm
oldPlayerState = predictedPlayerState;
current = CDataModel.GameState.ClActive.cmdNum;
//如果没有紧接着snapshot之后的comands，就不能精确预测当前的位置，所以就停在最后的正确位置上
cmdNum = current - CConstVar.CMD_BACKUP + 1;
CDataModel.GameState.GetUserCmd(cmdNum, out oldestCmd);
if (oldestCmd.serverTime > gamestate.snap.playerState.commandTime && oldestCmd.serverTime < gamestate.time)
{
if (CConstVar.ShowMiss > 0)
{
CLog.Info("exceeded Packet_Backup on commands");
}
return;
}
CDataModel.GameState.GetUserCmd(current, out latestCmd);
if (gamestate.nextSnap != null && !gamestate.nextFrameTeleport && !gamestate.thisFrameTeleport)
{
predictedPlayerState = gamestate.nextSnap.playerState;
gamestate.physicsTime = gamestate.nextSnap.serverTime;
}
else
{
predictedPlayerState = gamestate.snap.playerState;
gamestate.physicsTime = gamestate.snap.serverTime;
}
if (CConstVar.PMoveMsec < 8)
{
CConstVar.PMoveMsec = 8;
}
else if (CConstVar.PMoveMsec > 33)
{
CConstVar.PMoveMsec = 33;
}
pmove.pmoveFixed = CConstVar.PMoveFixed;
pmove.pmoveMsec = CConstVar.PMoveMsec;
pmove.pmoveFloat = CConstVar.PMoveFloat;
// pmove.pmv
if (CConstVar.OptimizePrediction)
{
if (gamestate.nextFrameTeleport || gamestate.thisFrameTeleport)
{
gamestate.lastPredictedCommand = 0;
gamestate.stateTail = gamestate.stateHead;
predictCmd = current - CConstVar.CMD_BACKUP + 1;
}
else if (gamestate.time == gamestate.lastServerTime)
{
predictCmd = gamestate.lastPredictedCommand + 1;
}
else
{
bool error = true;
for (int i = gamestate.stateHead; i != gamestate.stateTail; i = (i + 1) % CConstVar.NUM_SAVED_STATES)
{
if (gamestate.savedPmoveState[i].commandTime == predictedPlayerState.commandTime)
{
int errorcode = IsUnacceptableError(predictedPlayerState, gamestate.savedPmoveState[i]);
if (errorcode > 0)
{
if (CConstVar.ShowMiss > 0)
{
CLog.Info("errorcode %d at %d", errorcode, gamestate.time);
}
break;
}
pmove.playerState = gamestate.savedPmoveState[i];
gamestate.stateHead = (i + 1) % CConstVar.NUM_SAVED_STATES;
predictCmd = gamestate.lastPredictedCommand + 1;
error = false;
break;
}
}
if (error)
{
gamestate.lastPredictedCommand = 0;
gamestate.stateTail = gamestate.stateHead;
predictCmd = current - CConstVar.CMD_BACKUP + 1;
}
}
gamestate.lastServerTime = gamestate.physicsTime;
stateIndex = gamestate.stateHead;
}
moved = false;
for (cmdNum = current - CConstVar.CMD_BACKUP + 1; cmdNum <= current; cmdNum++)
{
CDataModel.GameState.GetUserCmd(current, out pmove.cmd);
if (pmove.pmoveFixed > 0)
{
PMove.UpdateViewAngles(pmove.playerState, pmove.cmd);
}
if (pmove.cmd.serverTime <= predictedPlayerState.commandTime)
{
continue;
}
if (pmove.cmd.serverTime > latestCmd.serverTime)
{
continue;
}
if (predictedPlayerState.commandTime == oldPlayerState.commandTime)
{
Vector3 delta;
float len;
if (gamestate.thisFrameTeleport)
{
gamestate.predictedError = Vector3.zero;
if (CConstVar.ShowMiss > 0)
{
CLog.Info("PredictionTeleport");
}
gamestate.thisFrameTeleport = false;
}
else
{
Vector3 adjusted, new_angles;
AdjustPositionForMover(predictedPlayerState.origin, predictedPlayerState.groundEntityNum, gamestate.physicsTime, gamestate.oldTime, out adjusted, predictedPlayerState.viewangles, out new_angles);
if (CConstVar.ShowMiss > 0)
{
if (oldPlayerState.origin != adjusted)
{
CLog.Info("prediction error");
}
}
delta = oldPlayerState.origin - adjusted;
len = delta.magnitude;
if (len > 0.1)
{
if (CConstVar.ShowMiss > 0)
{
CLog.Info("Prediction miss: %d", len);
}
if (CConstVar.ErrorDecay > 0)
{
int t = gamestate.time - gamestate.predictedErrorTime;
float f = (CConstVar.ErrorDecay - t) / CConstVar.ErrorDecay;
if (f < 0f)
{
f = 0f;
}
if (f > 0f && CConstVar.ShowMiss > 0)
{
CLog.Info("Double prediction decay: %d", f);
}
gamestate.predictedError = gamestate.predictedError * f;
}
else
{
gamestate.predictedError = Vector3.zero;
}
gamestate.predictedError = delta + gamestate.predictedError;
gamestate.predictedErrorTime = gamestate.oldTime;
}
}
}
pmove.gauntletHit = false;
if (pmove.pmoveFixed > 0)
{
pmove.cmd.serverTime = ((pmove.cmd.serverTime + CConstVar.PMoveMsec - 1) / CConstVar.PMoveMsec) * CConstVar.PMoveMsec;
}
if (CConstVar.OptimizePrediction)
{
if (cmdNum >= predictCmd || (stateIndex + 1) % CConstVar.NUM_SAVED_STATES == gamestate.stateHead)
{
pmove.Move();
numPredicted++;
gamestate.lastPredictedCommand = cmdNum;
if ((stateIndex + 1) % CConstVar.NUM_SAVED_STATES != gamestate.stateHead)
{
gamestate.savedPmoveState[stateIndex] = pmove.playerState;
stateIndex = (stateIndex + 1) % CConstVar.NUM_SAVED_STATES;
gamestate.stateTail = stateIndex;
}
}
else
{
numPlayedBack++;
if (CConstVar.ShowMiss > 0 && gamestate.savedPmoveState[stateIndex].commandTime != pmove.cmd.serverTime)
{
CLog.Info("saved state miss");
}
pmove.playerState = gamestate.savedPmoveState[stateIndex];
stateIndex = (stateIndex + 1) % CConstVar.NUM_SAVED_STATES;
}
}
else
{
pmove.Move();
numPredicted++;
}
moved = true;
}
if (CConstVar.ShowMiss > 1)
{
CLog.Info("[%d : %d] ", pmove.cmd.serverTime, gamestate.time);
}
if (!moved)
{
if (CConstVar.ShowMiss > 0)
{
CLog.Info("not moved");
}
return;
}
AdjustPositionForMover(predictedPlayerState.origin, predictedPlayerState.groundEntityNum, gamestate.physicsTime, gamestate.time, out predictedPlayerState.origin, predictedPlayerState.viewangles, out predictedPlayerState.viewangles);
if (CConstVar.ShowMiss > 0)
{
if (predictedPlayerState.eventSequence > oldPlayerState.eventSequence + CConstVar.MAX_PS_EVENTS)
{
CLog.Info("dropped event");
}
}
}