From e4daa4c0658dc8547352dd2039ab74d963a48ff0 Mon Sep 17 00:00:00 2001
From: Perttu Ahola <celeron55@gmail.com>
Date: Fri, 2 Dec 2011 01:08:14 +0200
Subject: [PATCH] Make players be again visible from a long distance

---
 src/environment.cpp | 45 ++++++++++++++++++++++++++++-----------------
 src/player.cpp      |  5 +++++
 src/player.h        |  3 +++
 src/serverobject.h  |  3 +++
 4 files changed, 39 insertions(+), 17 deletions(-)

diff --git a/src/environment.cpp b/src/environment.cpp
index 17c9ecf..e8dfebc 100644
--- a/src/environment.cpp
+++ b/src/environment.cpp
@@ -1217,10 +1217,12 @@ void ServerEnvironment::getAddedActiveObjects(v3s16 pos, s16 radius,
 		// Discard if removed
 		if(object->m_removed)
 			continue;
-		// Discard if too far
-		f32 distance_f = object->getBasePosition().getDistanceFrom(pos_f);
-		if(distance_f > radius_f)
-			continue;
+		if(object->unlimitedTransferDistance() == false){
+			// Discard if too far
+			f32 distance_f = object->getBasePosition().getDistanceFrom(pos_f);
+			if(distance_f > radius_f)
+				continue;
+		}
 		// Discard if already on current_objects
 		core::map<u16, bool>::Node *n;
 		n = current_objects.find(id);
@@ -1255,24 +1257,33 @@ void ServerEnvironment::getRemovedActiveObjects(v3s16 pos, s16 radius,
 	{
 		u16 id = i.getNode()->getKey();
 		ServerActiveObject *object = getActiveObject(id);
-		if(object == NULL)
-		{
+
+		if(object == NULL){
 			infostream<<"ServerEnvironment::getRemovedActiveObjects():"
 					<<" object in current_objects is NULL"<<std::endl;
+			removed_objects.insert(id, false);
+			continue;
 		}
-		else if(object->m_removed == false)
+
+		if(object->m_removed)
 		{
-			f32 distance_f = object->getBasePosition().getDistanceFrom(pos_f);
-			/*infostream<<"removed == false"
-					<<"distance_f = "<<distance_f
-					<<", radius_f = "<<radius_f<<std::endl;*/
-			if(distance_f < radius_f)
-			{
-				// Not removed
-				continue;
-			}
+			removed_objects.insert(id, false);
+			continue;
 		}
-		removed_objects.insert(id, false);
+		
+		// If transfer distance is unlimited, don't remove
+		if(object->unlimitedTransferDistance())
+			continue;
+
+		f32 distance_f = object->getBasePosition().getDistanceFrom(pos_f);
+
+		if(distance_f >= radius_f)
+		{
+			removed_objects.insert(id, false);
+			continue;
+		}
+		
+		// Not removed
 	}
 }
 
diff --git a/src/player.cpp b/src/player.cpp
index 8825668..f22eddf 100644
--- a/src/player.cpp
+++ b/src/player.cpp
@@ -242,6 +242,11 @@ void ServerRemotePlayer::removingFromEnvironment()
 	m_is_in_environment = false;
 }
 
+bool ServerRemotePlayer::unlimitedTransferDistance() const
+{
+	return true;
+}
+
 void ServerRemotePlayer::step(float dtime, bool send_recommended)
 {
 	if(send_recommended == false)
diff --git a/src/player.h b/src/player.h
index c9dbe76..cfd59d6 100644
--- a/src/player.h
+++ b/src/player.h
@@ -216,6 +216,9 @@ public:
 	
 	bool environmentDeletes() const
 	{ return false; }
+
+	virtual bool unlimitedTransferDistance() const;
+	
 	bool isStaticAllowed() const
 	{ return false; }
 
diff --git a/src/serverobject.h b/src/serverobject.h
index 1386136..fd8a51a 100644
--- a/src/serverobject.h
+++ b/src/serverobject.h
@@ -63,6 +63,9 @@ public:
 	// environment
 	virtual bool environmentDeletes() const
 	{ return true; }
+
+	virtual bool unlimitedTransferDistance() const
+	{ return false; }
 	
 	// Create a certain type of ServerActiveObject
 	static ServerActiveObject* create(u8 type,