From 15b86a6b9b4d32cc1213ebf8e1a2c12f56a83c16 Mon Sep 17 00:00:00 2001
From: MirceaKitsune <sonichedgehog_hyperblast00@yahoo.com>
Date: Sun, 2 Dec 2012 14:59:08 +0200
Subject: [PATCH] Don't send player position from client to server if the
 player hasn't moved

---
 src/client.cpp      | 18 ++++++++++++++++--
 src/localplayer.cpp |  5 +++++
 src/localplayer.h   |  8 ++++++++
 src/player.h        |  2 +-
 4 files changed, 30 insertions(+), 3 deletions(-)

diff --git a/src/client.cpp b/src/client.cpp
index 865cf71ee..3463e9262 100644
--- a/src/client.cpp
+++ b/src/client.cpp
@@ -1976,10 +1976,24 @@ void Client::sendPlayerPos()
 {
 	//JMutexAutoLock envlock(m_env_mutex); //bulk comment-out
 	
-	Player *myplayer = m_env.getLocalPlayer();
+	LocalPlayer *myplayer = m_env.getLocalPlayer();
 	if(myplayer == NULL)
 		return;
-	
+
+	// Save bandwidth by only updating position when something changed
+	if(myplayer->last_position == myplayer->getPosition() &&
+			myplayer->last_speed == myplayer->getSpeed() &&
+			myplayer->last_pitch == myplayer->getPitch() &&
+			myplayer->last_yaw == myplayer->getYaw() &&
+			myplayer->last_keyPressed == myplayer->keyPressed)
+		return;
+
+	myplayer->last_position = myplayer->getPosition();
+	myplayer->last_speed = myplayer->getSpeed();
+	myplayer->last_pitch = myplayer->getPitch();
+	myplayer->last_yaw = myplayer->getYaw();
+	myplayer->last_keyPressed = myplayer->keyPressed;
+
 	u16 our_peer_id;
 	{
 		//JMutexAutoLock lock(m_con_mutex); //bulk comment-out
diff --git a/src/localplayer.cpp b/src/localplayer.cpp
index 17c4cdeb9..14d1ac60e 100644
--- a/src/localplayer.cpp
+++ b/src/localplayer.cpp
@@ -36,6 +36,11 @@ LocalPlayer::LocalPlayer(IGameDef *gamedef):
 	Player(gamedef),
 	isAttached(false),
 	overridePosition(v3f(0,0,0)),
+	last_position(v3f(0,0,0)),
+	last_speed(v3f(0,0,0)),
+	last_pitch(0),
+	last_yaw(0),
+	last_keyPressed(0),
 	m_sneak_node(32767,32767,32767),
 	m_sneak_node_exists(false),
 	m_old_node_below(32767,32767,32767),
diff --git a/src/localplayer.h b/src/localplayer.h
index 9d1829db8..c9d010d7c 100644
--- a/src/localplayer.h
+++ b/src/localplayer.h
@@ -44,6 +44,14 @@ public:
 	void applyControl(float dtime);
 
 	v3s16 getStandingNodePos();
+
+	// Used to check if anything changed and prevent sending packets if not
+	v3f last_position;
+	v3f last_speed;
+	float last_pitch;
+	float last_yaw;
+	unsigned int last_keyPressed;
+
 private:
 	// This is used for determining the sneaking range
 	v3s16 m_sneak_node;
diff --git a/src/player.h b/src/player.h
index 6c7c1e4ea..5a489e64f 100644
--- a/src/player.h
+++ b/src/player.h
@@ -220,7 +220,7 @@ public:
 	}
 	
 	u32 keyPressed;
-	
+
 protected:
 	IGameDef *m_gamedef;