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Fix possible sendPlayerPos desync situation (#16498)

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This commit is contained in:
sfan5
2025-10-15 00:21:07 +02:00
committed by GitHub
parent 7d4f80f1cc
commit c965bb77bd
2 changed files with 17 additions and 6 deletions
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22
src/client/client.cpp
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@@ -566,9 +566,8 @@ void Client::step(float dtime)
{
float &counter = m_playerpos_send_timer;
counter += dtime;
if((m_state == LC_Ready) && (counter >= m_recommended_send_interval))
{
counter = 0.0;
if (m_state == LC_Ready && counter >= m_recommended_send_interval) {
counter = 0;
sendPlayerPos();
}
}
@@ -1403,7 +1402,7 @@ void Client::sendPlayerPos()
f32 movement_speed = player->control.movement_speed;
f32 movement_dir = player->control.movement_direction;
if (
bool identical = (
player->last_position == player->getPosition() &&
player->last_speed == player->getSpeed() &&
player->last_pitch == player->getPitch() &&
@@ -1413,8 +1412,19 @@ void Client::sendPlayerPos()
player->last_camera_inverted == camera_inverted &&
player->last_wanted_range == wanted_range &&
player->last_movement_speed == movement_speed &&
player->last_movement_dir == movement_dir)
return;
player->last_movement_dir == movement_dir);
if (identical) {
// Since the movement info is sent non-reliable an unfortunate desync might
// occur if we stop sending and the last packet gets lost or re-ordered.
// To make this situation less likely we stop sending duplicate packets
// only after a delay.
m_playerpos_repeat_count++;
if (m_playerpos_repeat_count >= 5)
return;
} else {
m_playerpos_repeat_count = 0;
}
player->last_position = player->getPosition();
player->last_speed = player->getSpeed();

1
src/client/client.h
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@@ -478,6 +478,7 @@ private:
float m_connection_reinit_timer = 0.1f;
float m_avg_rtt_timer = 0.0f;
float m_playerpos_send_timer = 0.0f;
int m_playerpos_repeat_count = 0;
IntervalLimiter m_map_timer_and_unload_interval;
IWritableTextureSource *m_tsrc;