1 files changed, 361 insertions, 0 deletions

diff --git a/src/MobSpawner.cpp b/src/MobSpawner.cpp
new file mode 100644
index 000000000..4d0b2777b
--- /dev/null
+++ b/src/MobSpawner.cpp
@@ -0,0 +1,361 @@
+
+#include "Globals.h"  // NOTE: MSVC stupidness requires this to be the same across all modules
+
+#include "MobSpawner.h"
+#include "Mobs/IncludeAllMonsters.h"
+
+
+
+
+
+cMobSpawner::cMobSpawner(cMonster::eFamily a_MonsterFamily,const std::set<cMonster::eType>& a_AllowedTypes) :
+	m_MonsterFamily(a_MonsterFamily),
+	m_NewPack(true),
+	m_MobType(cMonster::mtInvalidType)
+{
+	for (std::set<cMonster::eType>::const_iterator itr = a_AllowedTypes.begin(); itr != a_AllowedTypes.end(); itr++)
+	{
+		if (cMonster::FamilyFromType(*itr) == a_MonsterFamily)
+		{
+			m_AllowedTypes.insert(*itr);
+		}
+	}
+}
+
+
+
+
+
+bool cMobSpawner::CheckPackCenter(BLOCKTYPE a_BlockType)
+{
+	// Packs of non-water mobs can only be centered on an air block
+	// Packs of water mobs can only be centered on a water block
+	if (m_MonsterFamily == cMonster::mfWater)
+	{
+		return IsBlockWater(a_BlockType);
+	}
+	else
+	{
+		return a_BlockType == E_BLOCK_AIR;
+	}
+}
+
+
+
+
+
+void cMobSpawner::addIfAllowed(cMonster::eType toAdd, std::set<cMonster::eType>& toAddIn)
+{
+	std::set<cMonster::eType>::iterator itr = m_AllowedTypes.find(toAdd);
+	if (itr != m_AllowedTypes.end())
+	{
+		toAddIn.insert(toAdd);
+	}
+}
+
+
+
+
+
+cMonster::eType cMobSpawner::ChooseMobType(EMCSBiome a_Biome)
+{
+	std::set<cMonster::eType> allowedMobs;
+
+	if (a_Biome == biMushroomIsland || a_Biome == biMushroomShore)
+	{
+		addIfAllowed(cMonster::mtMooshroom, allowedMobs);
+	}
+	else if (a_Biome == biNether)
+	{
+		addIfAllowed(cMonster::mtGhast, allowedMobs);
+		addIfAllowed(cMonster::mtZombiePigman, allowedMobs);
+		addIfAllowed(cMonster::mtMagmaCube, allowedMobs);
+	}
+	else if (a_Biome == biEnd)
+	{
+		addIfAllowed(cMonster::mtEnderman, allowedMobs);
+	}
+	else
+	{
+		addIfAllowed(cMonster::mtBat, allowedMobs);
+		addIfAllowed(cMonster::mtSpider, allowedMobs);
+		addIfAllowed(cMonster::mtZombie, allowedMobs);
+		addIfAllowed(cMonster::mtSkeleton, allowedMobs);
+		addIfAllowed(cMonster::mtCreeper, allowedMobs);
+		addIfAllowed(cMonster::mtSquid, allowedMobs);
+		
+		if (a_Biome != biDesert && a_Biome != biBeach && a_Biome != biOcean)
+		{
+			addIfAllowed(cMonster::mtSheep, allowedMobs);
+			addIfAllowed(cMonster::mtPig, allowedMobs);
+			addIfAllowed(cMonster::mtCow, allowedMobs);
+			addIfAllowed(cMonster::mtChicken, allowedMobs);
+			addIfAllowed(cMonster::mtEnderman, allowedMobs);
+			addIfAllowed(cMonster::mtSlime, allowedMobs);	// MG TODO : much more complicated rule
+			
+			if (a_Biome == biForest || a_Biome == biForestHills || a_Biome == biTaiga  || a_Biome == biTaigaHills)
+			{
+				addIfAllowed(cMonster::mtWolf, allowedMobs);
+			}
+			else if (a_Biome == biJungle || a_Biome == biJungleHills)
+			{
+				addIfAllowed(cMonster::mtOcelot, allowedMobs);
+			}
+		}
+	}
+
+	int allowedMobsSize = allowedMobs.size();
+	if (allowedMobsSize > 0)
+	{
+		std::set<cMonster::eType>::iterator itr = allowedMobs.begin();
+		int iRandom = m_Random.NextInt(allowedMobsSize,a_Biome);
+
+		for(int i = 0; i < iRandom; i++)
+		{
+			itr++;
+		}
+
+		return *itr;
+	}
+	return cMonster::mtInvalidType;
+}
+
+
+
+
+
+bool cMobSpawner::CanSpawnHere(cChunk * a_Chunk, int a_RelX, int a_RelY, int a_RelZ, cMonster::eType a_MobType, EMCSBiome a_Biome)
+{
+	BLOCKTYPE TargetBlock;
+	if (m_AllowedTypes.find(a_MobType) != m_AllowedTypes.end() && a_Chunk->UnboundedRelGetBlockType(a_RelX, a_RelY, a_RelZ, TargetBlock))
+	{
+		NIBBLETYPE BlockLight = a_Chunk->GetBlockLight(a_RelX, a_RelY, a_RelZ);
+		NIBBLETYPE SkyLight = a_Chunk->GetSkyLight(a_RelX, a_RelY, a_RelZ);
+		BLOCKTYPE BlockAbove = a_Chunk->GetBlock(a_RelX, a_RelY + 1, a_RelZ);
+		BLOCKTYPE BlockBelow = a_Chunk->GetBlock(a_RelX, a_RelY - 1, a_RelZ);
+
+		SkyLight = a_Chunk->GetTimeAlteredLight(SkyLight);
+
+		switch(a_MobType)
+		{
+			case cMonster::mtSquid:
+			{
+				return IsBlockWater(TargetBlock) && (a_RelY >= 45) && (a_RelY <= 62);
+			}
+
+			case cMonster::mtBat:
+			{
+				return (a_RelY <= 63) && (BlockLight <= 4) && (SkyLight <= 4) && (TargetBlock == E_BLOCK_AIR) && (!g_BlockTransparent[BlockAbove]);
+			}
+
+			case cMonster::mtChicken:
+			case cMonster::mtCow:
+			case cMonster::mtPig:
+			case cMonster::mtHorse:
+			case cMonster::mtSheep:
+			{
+				return (
+					(TargetBlock == E_BLOCK_AIR) &&
+					(BlockAbove == E_BLOCK_AIR) &&
+					(!g_BlockTransparent[BlockBelow]) &&
+					(BlockBelow == E_BLOCK_GRASS) &&
+					(SkyLight >= 9)
+				);
+			}
+				
+			case cMonster::mtOcelot:
+			{
+				return (
+					(TargetBlock == E_BLOCK_AIR) &&
+					(BlockAbove == E_BLOCK_AIR) &&
+					(
+						(BlockBelow == E_BLOCK_GRASS) || (BlockBelow == E_BLOCK_LEAVES)
+					) &&
+					(a_RelY >= 62) &&
+					(m_Random.NextInt(3, a_Biome) != 0)
+				);
+			}
+			
+			case cMonster::mtEnderman:
+			{
+				if (a_RelY < 250)
+				{
+					BLOCKTYPE BlockTop = a_Chunk->GetBlock(a_RelX, a_RelY + 2, a_RelZ);
+					if (BlockTop == E_BLOCK_AIR)
+					{
+						BlockTop = a_Chunk->GetBlock(a_RelX, a_RelY + 3, a_RelZ);
+						return (
+							(TargetBlock == E_BLOCK_AIR) &&
+							(BlockAbove == E_BLOCK_AIR) &&
+							(BlockTop == E_BLOCK_AIR) &&
+							(!g_BlockTransparent[BlockBelow]) &&
+							(SkyLight <= 7) &&
+							(BlockLight <= 7)
+						);
+					}
+				}
+				break;
+			}
+			
+			case cMonster::mtSpider:
+			{
+				bool CanSpawn = true;
+				bool HaveFloor = false;
+				for (int x = 0; x < 2; ++x)
+				{
+					for(int z = 0; z < 2; ++z)
+					{
+						CanSpawn = a_Chunk->UnboundedRelGetBlockType(a_RelX + x, a_RelY, a_RelZ + z, TargetBlock);
+						CanSpawn = CanSpawn && (TargetBlock == E_BLOCK_AIR);
+						if (!CanSpawn)
+						{
+							return false;
+						}
+						HaveFloor = (
+							HaveFloor ||
+							(
+								a_Chunk->UnboundedRelGetBlockType(a_RelX + x, a_RelY - 1, a_RelZ + z, TargetBlock) &&
+								!g_BlockTransparent[TargetBlock]
+							)
+						);
+					}
+				}
+				return CanSpawn && HaveFloor && (SkyLight <= 7) && (BlockLight <= 7);
+			}
+			
+			case cMonster::mtCreeper:
+			case cMonster::mtSkeleton:
+			case cMonster::mtZombie:
+			{
+				return (
+					(TargetBlock == E_BLOCK_AIR) &&
+					(BlockAbove == E_BLOCK_AIR) &&
+					(!g_BlockTransparent[BlockBelow]) &&
+					(SkyLight <= 7) &&
+					(BlockLight <= 7) &&
+					(m_Random.NextInt(2, a_Biome) == 0)
+				);
+			}
+			
+			case cMonster::mtSlime:
+			{
+				return (
+					(TargetBlock == E_BLOCK_AIR) &&
+					(BlockAbove == E_BLOCK_AIR) &&
+					(!g_BlockTransparent[BlockBelow]) &&
+					(
+						(a_RelY <= 40) || (a_Biome == biSwampland)
+					)
+				);
+			}
+			
+			case cMonster::mtGhast:
+			case cMonster::mtZombiePigman:
+			{
+				return (
+					(TargetBlock == E_BLOCK_AIR) &&
+					(BlockAbove == E_BLOCK_AIR) &&
+					(!g_BlockTransparent[BlockBelow]) &&
+					(m_Random.NextInt(20, a_Biome) == 0)
+				);
+			}
+			
+			case cMonster::mtWolf:
+			{
+				return (
+					(TargetBlock == E_BLOCK_GRASS) &&
+					(BlockAbove == E_BLOCK_AIR) &&
+					(
+						(a_Biome == biTaiga) ||
+						(a_Biome == biTaigaHills) ||
+						(a_Biome == biForest) ||
+						(a_Biome == biForestHills) ||
+						(a_Biome == biColdTaiga) ||
+						(a_Biome == biColdTaigaHills) ||
+						(a_Biome == biTaigaM) ||
+						(a_Biome == biMegaTaiga) ||
+						(a_Biome == biMegaTaigaHills)
+					)
+				);
+			}
+			
+			default:
+			{
+				LOGD("MG TODO: Write spawning rule for mob type %d", a_MobType);
+				return false;
+			}
+		}
+	}
+	return false;
+}
+
+
+
+
+
+cMonster* cMobSpawner::TryToSpawnHere(cChunk * a_Chunk, int a_RelX, int a_RelY, int a_RelZ, EMCSBiome a_Biome, int& a_MaxPackSize)
+{
+	cMonster* toReturn = NULL;
+	if (m_NewPack)
+	{
+		m_MobType = ChooseMobType(a_Biome);
+		if (m_MobType == cMonster::mtInvalidType)
+		{
+			return toReturn;
+		}
+		if (m_MobType == cMonster::mtWolf)
+		{
+			a_MaxPackSize = 8;
+		}
+		else if (m_MobType == cMonster::mtGhast)
+		{
+			a_MaxPackSize = 1;
+		}
+		m_NewPack = false;
+	}
+
+	// Make sure we are looking at the right chunk to spawn in
+	a_Chunk = a_Chunk->GetRelNeighborChunkAdjustCoords(a_RelX, a_RelZ);
+	
+	if (CanSpawnHere(a_Chunk, a_RelX, a_RelY, a_RelZ, m_MobType, a_Biome))
+	{
+		cMonster * newMob = cMonster::NewMonsterFromType(m_MobType);
+		if (newMob)
+		{
+			m_Spawned.insert(newMob);
+		}
+		toReturn = newMob;
+	}
+	return toReturn;
+}
+
+
+
+
+
+void cMobSpawner::NewPack()
+{
+	m_NewPack = true;
+}
+
+
+
+
+
+cMobSpawner::tSpawnedContainer & cMobSpawner::getSpawned(void)
+{
+	return m_Spawned;
+}
+
+
+
+
+
+bool cMobSpawner::CanSpawnAnything(void)
+{
+	return !m_AllowedTypes.empty();
+}
+
+
+
+