From 3e754382af5d57b20fc2f6d59f991c9a79ccb0f7 Mon Sep 17 00:00:00 2001
From: Perttu Ahola <celeron55@gmail.com>
Date: Fri, 27 Jul 2012 15:46:51 +0300
Subject: [PATCH] Tweak rollback and liquids

---
 src/map.cpp              |  5 ++---
 src/rollback.cpp         | 19 ++++++++++---------
 src/rollback.h           |  4 ++--
 src/rollback_interface.h |  4 ++--
 4 files changed, 16 insertions(+), 16 deletions(-)

diff --git a/src/map.cpp b/src/map.cpp
index 8ddc4006e..824553b37 100644
--- a/src/map.cpp
+++ b/src/map.cpp
@@ -1636,7 +1636,7 @@ void Map::transformLiquids(core::map<v3s16, MapBlock*> & modified_blocks)
 	while(m_transforming_liquid.size() != 0)
 	{
 		// This should be done here so that it is done when continue is used
-		if(loopcount >= initial_size || loopcount >= 1000)
+		if(loopcount >= initial_size || loopcount >= 10000)
 			break;
 		loopcount++;
 
@@ -1828,8 +1828,7 @@ void Map::transformLiquids(core::map<v3s16, MapBlock*> & modified_blocks)
 		// Find out whether there is a suspect for this action
 		std::string suspect;
 		if(m_gamedef->rollback()){
-			// Max. 5 seconds ago, shortcut at 98 points
-			suspect = m_gamedef->rollback()->getSuspect(p0, 5, 95);
+			suspect = m_gamedef->rollback()->getSuspect(p0, 83, 1);
 		}
 
 		if(!suspect.empty()){
diff --git a/src/rollback.cpp b/src/rollback.cpp
index 9cbcb6c25..f0e3c40aa 100644
--- a/src/rollback.cpp
+++ b/src/rollback.cpp
@@ -33,6 +33,8 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 
 #define PP(x) "("<<(x).X<<","<<(x).Y<<","<<(x).Z<<")"
 
+#define POINTS_PER_NODE (16.0)
+
 // Get nearness factor for subject's action for this action
 // Return value: 0 = impossible, >0 = factor
 static float getSuspectNearness(bool is_guess, v3s16 suspect_p, int suspect_t,
@@ -43,10 +45,10 @@ static float getSuspectNearness(bool is_guess, v3s16 suspect_p, int suspect_t,
 		return 0; // 0 = cannot be
 	// Start from 100
 	int f = 100;
-	// Distance (1 node = -1 point)
-	f -= 1.0 * intToFloat(suspect_p, 1).getDistanceFrom(intToFloat(action_p, 1));
-	// Time (1 second = -1 point)
-	f -= 1.0 * (action_t - suspect_t);
+	// Distance (1 node = -x points)
+	f -= POINTS_PER_NODE * intToFloat(suspect_p, 1).getDistanceFrom(intToFloat(action_p, 1));
+	// Time (1 second = -x points)
+	f -= 1 * (action_t - suspect_t);
 	// If is a guess, halve the points
 	if(is_guess)
 		f *= 0.5;
@@ -76,8 +78,7 @@ public:
 			v3s16 p;
 			if(!action.getPosition(&p))
 				return;
-			// 60s default timeframe, 95 points shortcut
-			action.actor = getSuspect(p, 60, 95);
+			action.actor = getSuspect(p, 83, 1);
 			if(action.actor.empty())
 				return;
 			action.actor_is_guess = true;
@@ -103,12 +104,12 @@ public:
 		m_current_actor = actor;
 		m_current_actor_is_guess = is_guess;
 	}
-	std::string getSuspect(v3s16 p, int max_time, float nearness_shortcut)
+	std::string getSuspect(v3s16 p, float nearness_shortcut, float min_nearness)
 	{
 		if(m_current_actor != "")
 			return m_current_actor;
 		int cur_time = time(0);
-		int first_time = cur_time - max_time;
+		int first_time = cur_time - (100-min_nearness);
 		RollbackAction likely_suspect;
 		float likely_suspect_nearness = 0;
 		for(std::list<RollbackAction>::const_reverse_iterator
@@ -125,7 +126,7 @@ public:
 				continue;
 			float f = getSuspectNearness(i->actor_is_guess, suspect_p,
 					i->unix_time, p, cur_time);
-			if(f > likely_suspect_nearness){
+			if(f >= min_nearness && f > likely_suspect_nearness){
 				likely_suspect_nearness = f;
 				likely_suspect = *i;
 				if(likely_suspect_nearness >= nearness_shortcut)
diff --git a/src/rollback.h b/src/rollback.h
index 0ae80c51d..5e76042b5 100644
--- a/src/rollback.h
+++ b/src/rollback.h
@@ -35,8 +35,8 @@ public:
 	virtual std::string getActor() = 0;
 	virtual bool isActorGuess() = 0;
 	virtual void setActor(const std::string &actor, bool is_guess) = 0;
-	// nearness_shortcut: 100 = same second, same node; 90 = 10s or 10 nodes
-	virtual std::string getSuspect(v3s16 p, int max_time, float nearness_shortcut) = 0;
+	virtual std::string getSuspect(v3s16 p, float nearness_shortcut,
+			float min_nearness) = 0;
 
 	virtual ~IRollbackManager(){}
 	virtual void flush() = 0;
diff --git a/src/rollback_interface.h b/src/rollback_interface.h
index 119379ae7..8dd429d76 100644
--- a/src/rollback_interface.h
+++ b/src/rollback_interface.h
@@ -124,8 +124,8 @@ public:
 	virtual std::string getActor() = 0;
 	virtual bool isActorGuess() = 0;
 	virtual void setActor(const std::string &actor, bool is_guess) = 0;
-	// nearness_shortcut: 100 = same second, same node; 90 = 10s or 10 nodes
-	virtual std::string getSuspect(v3s16 p, int max_time, float nearness_shortcut=98) = 0;
+	virtual std::string getSuspect(v3s16 p, float nearness_shortcut,
+			float min_nearness) = 0;
 };
 
 class RollbackScopeActor