Fix formatting, remove unused code

lib/callback/GameRandomizer.cpp

@@ -24,23 +24,18 @@
 
 VCMI_LIB_NAMESPACE_BEGIN
 
-BiasedRandomizer::BiasedRandomizer(int seed)
-	: seed(seed)
-{
-}
-
-bool BiasedRandomizer::roll(int successChance, int totalWeight, int biasValue)
+bool RandomizationBias::roll(vstd::RNG & generator, int successChance, int totalWeight, int biasValue)
 {
 	assert(successChance > 0);
 	assert(totalWeight >= successChance);
 
 	int failChance = totalWeight - successChance;
-	int newRoll = seed.nextInt(1,totalWeight);
+	int newRoll = generator.nextInt(1, totalWeight);
 	// accumulated bias is stored as premultiplied to avoid precision loss on division
 	// so multiply everything else in equation to compensate
 	// precision loss is small, and generally insignificant, but better to play it safe
 	bool success = newRoll * totalWeight - accumulatedBias <= successChance * totalWeight;
-	if (success)
+	if(success)
 		accumulatedBias -= failChance * biasValue;
 	else
 		accumulatedBias += successChance * biasValue;
@@ -48,6 +43,16 @@ bool BiasedRandomizer::roll(int successChance, int totalWeight, int biasValue)
 	return success;
 }
 
+RandomGeneratorWithBias::RandomGeneratorWithBias(int seed)
+	: generator(seed)
+{
+}
+
+bool RandomGeneratorWithBias::roll(int successChance, int totalWeight, int biasValue)
+{
+	return bias.roll(generator, successChance, totalWeight, biasValue);
+}
+
 GameRandomizer::GameRandomizer(const IGameInfoCallback & gameInfo)
 	: gameInfo(gameInfo)
 {
@@ -56,14 +61,14 @@ GameRandomizer::GameRandomizer(const IGameInfoCallback & gameInfo)
 GameRandomizer::~GameRandomizer() = default;
 
 
-bool GameRandomizer::rollMoraleLuck(std::map<ObjectInstanceID, BiasedRandomizer> & seeds, ObjectInstanceID actor, int moraleLuckValue, EGameSettings diceSize, EGameSettings diceWeights)
+bool GameRandomizer::rollMoraleLuck(std::map<ObjectInstanceID, RandomGeneratorWithBias> & seeds, ObjectInstanceID actor, int moraleLuckValue, EGameSettings diceSize, EGameSettings diceWeights)
 {
 	assert(moraleLuckValue > 0);
 	auto goodLuckChanceVector = gameInfo.getSettings().getVector(diceWeights);
 	int luckDiceSize = gameInfo.getSettings().getInteger(diceSize);
 	size_t chanceIndex = std::min<size_t>(goodLuckChanceVector.size(), moraleLuckValue) - 1; // array index, so 0-indexed
 
-	if (!seeds.count(actor))
+	if(!seeds.count(actor))
 		seeds.emplace(actor, getDefault().nextInt());
 
 	if(goodLuckChanceVector.size() == 0)
@@ -94,23 +99,18 @@ bool GameRandomizer::rollBadLuck(ObjectInstanceID actor, int luckValue)
 
 bool GameRandomizer::rollCombatAbility(ObjectInstanceID actor, int percentageChance)
 {
-	if (!combatAbilitySeed.count(actor))
+	if(!combatAbilitySeed.count(actor))
 		combatAbilitySeed.emplace(actor, getDefault().nextInt());
 
-	if (percentageChance <= 0)
+	if(percentageChance <= 0)
 		return false;
 
-	if (percentageChance >= 100)
+	if(percentageChance >= 100)
 		return true;
 
 	return combatAbilitySeed.at(actor).roll(percentageChance, 100, biasValueAbility);
 }
 
-//HeroTypeID GameRandomizer::rollHero(PlayerColor player, FactionID faction)
-//{
-//
-//}
-
 CreatureID GameRandomizer::rollCreature()
 {
 	std::vector<CreatureID> allowed;
@@ -215,14 +215,15 @@ ArtifactID GameRandomizer::rollArtifact(std::set<ArtifactID> potentialPicks)
 
 std::vector<ArtifactID> GameRandomizer::rollMarketArtifactSet()
 {
-	std::vector<ArtifactID> out;
-	for(int j = 0; j < 3; j++)
-		out.push_back(rollArtifact(EArtifactClass::ART_TREASURE));
-	for(int j = 0; j < 3; j++)
-		out.push_back(rollArtifact(EArtifactClass::ART_MINOR));
-	out.push_back(rollArtifact(EArtifactClass::ART_MAJOR));
-
-	return out;
+	return {
+		rollArtifact(EArtifactClass::ART_TREASURE),
+		rollArtifact(EArtifactClass::ART_TREASURE),
+		rollArtifact(EArtifactClass::ART_TREASURE),
+		rollArtifact(EArtifactClass::ART_MINOR),
+		rollArtifact(EArtifactClass::ART_MINOR),
+		rollArtifact(EArtifactClass::ART_MINOR),
+		rollArtifact(EArtifactClass::ART_MAJOR)
+	};
 }
 
 vstd::RNG & GameRandomizer::getDefault()
@@ -237,7 +238,7 @@ void GameRandomizer::setSeed(int newSeed)
 
 PrimarySkill GameRandomizer::rollPrimarySkillForLevelup(const CGHeroInstance * hero)
 {
-	if (!heroSkillSeed.count(hero->getHeroTypeID()))
+	if(!heroSkillSeed.count(hero->getHeroTypeID()))
 		heroSkillSeed.emplace(hero->getHeroTypeID(), getDefault().nextInt());
 
 	const bool isLowLevelHero = hero->level < GameConstants::HERO_HIGH_LEVEL;
@@ -255,7 +256,7 @@ PrimarySkill GameRandomizer::rollPrimarySkillForLevelup(const CGHeroInstance * h
 
 SecondarySkill GameRandomizer::rollSecondarySkillForLevelup(const CGHeroInstance * hero, const std::set<SecondarySkill> & options)
 {
-	if (!heroSkillSeed.count(hero->getHeroTypeID()))
+	if(!heroSkillSeed.count(hero->getHeroTypeID()))
 		heroSkillSeed.emplace(hero->getHeroTypeID(), getDefault().nextInt());
 
 	auto & heroRng = heroSkillSeed.at(hero->getHeroTypeID());
@@ -314,7 +315,6 @@ SecondarySkill GameRandomizer::rollSecondarySkillForLevelup(const CGHeroInstance
 	int selectedIndex = RandomGeneratorUtil::nextItemWeighted(weights, heroRng.seed);
 	SecondarySkill selectedSkill = skills.at(selectedIndex);
 
-
 	//deterministic secondary skills
 	++heroRng.magicSchoolCounter;
 	++heroRng.wisdomCounter;

lib/callback/GameRandomizer.h

@@ -18,18 +18,29 @@ enum class EGameSettings;
 
 class CGHeroInstance;
 
+class RandomizationBias
+{
+	int32_t accumulatedBias = 0;
+
+public:
+	/// Performs coin flip with specified success chance
+	/// Returns true with probability successChance percents, and false with probability totalWeight-successChance percents
+	bool roll(vstd::RNG & generator, int successChance, int totalWeight, int biasValue);
+};
+
 /// Biased randomizer that has following properties:
 /// - at bias value of 0 it acts as statistical random generator, just like vstd::RNG
 /// - at bias value of 100 it guarantees that it will take at most 100/chance rolls till succesfull roll
 /// - at bias value between 1..99 similar guarantee is also provided, but with larger number of rolls
 /// No matter what bias is, statistical probability on large number of rolls remains the same
 /// Its goal is to simulate human expectations of random distributions and reduce frustration from "bad" rolls
-class BiasedRandomizer
+class RandomGeneratorWithBias
 {
-	CRandomGenerator seed;
-	int32_t accumulatedBias = 0;
+	CRandomGenerator generator;
+	RandomizationBias bias;
+
 public:
-	explicit BiasedRandomizer(int seed);
+	explicit RandomGeneratorWithBias(int seed);
 	/// Performs coin flip with specified success chance
 	/// Returns true with probability successChance percents, and false with probability 100-successChance percents
 	bool roll(int successChance, int totalWeight, int biasValue);
@@ -42,8 +53,8 @@ class DLL_LINKAGE GameRandomizer final : public IGameRandomizer
 
 	struct HeroSkillRandomizer
 	{
-		HeroSkillRandomizer(int seed)
-			:seed(seed)
+		explicit HeroSkillRandomizer(int seed)
+			: seed(seed)
 		{}
 
 		CRandomGenerator seed;
@@ -62,13 +73,14 @@ class DLL_LINKAGE GameRandomizer final : public IGameRandomizer
 	std::map<HeroTypeID, HeroSkillRandomizer> heroSkillSeed;
 	std::map<PlayerColor, CRandomGenerator> playerTavern;
 
-	std::map<ObjectInstanceID, BiasedRandomizer> goodMoraleSeed;
-	std::map<ObjectInstanceID, BiasedRandomizer> badMoraleSeed;
-	std::map<ObjectInstanceID, BiasedRandomizer> goodLuckSeed;
-	std::map<ObjectInstanceID, BiasedRandomizer> badLuckSeed;
-	std::map<ObjectInstanceID, BiasedRandomizer> combatAbilitySeed;
+	std::map<ObjectInstanceID, RandomGeneratorWithBias> goodMoraleSeed;
+	std::map<ObjectInstanceID, RandomGeneratorWithBias> badMoraleSeed;
+	std::map<ObjectInstanceID, RandomGeneratorWithBias> goodLuckSeed;
+	std::map<ObjectInstanceID, RandomGeneratorWithBias> badLuckSeed;
+	std::map<ObjectInstanceID, RandomGeneratorWithBias> combatAbilitySeed;
+
+	bool rollMoraleLuck(std::map<ObjectInstanceID, RandomGeneratorWithBias> & seeds, ObjectInstanceID actor, int moraleLuckValue, EGameSettings diceSize, EGameSettings diceWeights);
 
-	bool rollMoraleLuck(std::map<ObjectInstanceID, BiasedRandomizer> & seeds, ObjectInstanceID actor, int moraleLuckValue, EGameSettings diceSize, EGameSettings diceWeights);
 public:
 	explicit GameRandomizer(const IGameInfoCallback & gameInfo);
 	~GameRandomizer();
@@ -83,8 +95,6 @@ public:
 
 	bool rollCombatAbility(ObjectInstanceID actor, int percentageChance);
 
-//	HeroTypeID rollHero(PlayerColor player, FactionID faction) override;
-
 	CreatureID rollCreature() override;
 	CreatureID rollCreature(int tier) override;
 

lib/callback/IGameEventCallback.h

@@ -117,6 +117,7 @@ public:
 
 	virtual bool isVisitCoveredByAnotherQuery(const CGObjectInstance *obj, const CGHeroInstance *hero) = 0;
 
+	/// Returns global random generator. TODO: remove, replace with IGameRanndomizer as separate parameter to such methods
 	virtual vstd::RNG & getRandomGenerator() = 0;
 };
 

lib/callback/IGameRandomizer.h

@@ -19,7 +19,7 @@ enum class EArtifactClass;
 
 namespace vstd
 {
-	class RNG;
+class RNG;
 }
 
 /// Provides source of random rolls for game entities