From 4e249fb3fbf75f0359758760d88e22aa5b14533c Mon Sep 17 00:00:00 2001
From: Perttu Ahola <celeron55@gmail.com>
Date: Sat, 27 Nov 2010 01:02:21 +0200
Subject: Initial files

---
 src/mapsector.cpp | 652 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 652 insertions(+)
 create mode 100644 src/mapsector.cpp

(limited to 'src/mapsector.cpp')

diff --git a/src/mapsector.cpp b/src/mapsector.cpp
new file mode 100644
index 000000000..8dd1c8c91
--- /dev/null
+++ b/src/mapsector.cpp
@@ -0,0 +1,652 @@
+#include "mapsector.h"
+#include "jmutexautolock.h"
+#include "client.h"
+#include "exceptions.h"
+
+MapSector::MapSector(NodeContainer *parent, v2s16 pos):
+		differs_from_disk(true),
+		usage_timer(0.0),
+		m_parent(parent),
+		m_pos(pos),
+		m_block_cache(NULL)
+{
+	m_mutex.Init();
+	assert(m_mutex.IsInitialized());
+}
+
+MapSector::~MapSector()
+{
+	deleteBlocks();
+}
+
+void MapSector::deleteBlocks()
+{
+	JMutexAutoLock lock(m_mutex);
+
+	// Clear cache
+	m_block_cache = NULL;
+
+	// Delete all
+	core::map<s16, MapBlock*>::Iterator i = m_blocks.getIterator();
+	for(; i.atEnd() == false; i++)
+	{
+		delete i.getNode()->getValue();
+	}
+
+	// Clear container
+	m_blocks.clear();
+}
+
+MapBlock * MapSector::getBlockBuffered(s16 y)
+{
+	MapBlock *block;
+
+	if(m_block_cache != NULL && y == m_block_cache_y){
+		return m_block_cache;
+	}
+	
+	// If block doesn't exist, return NULL
+	core::map<s16, MapBlock*>::Node *n = m_blocks.find(y);
+	if(n == NULL)
+	{
+		block = NULL;
+	}
+	// If block exists, return it
+	else{
+		block = n->getValue();
+	}
+	
+	// Cache the last result
+	m_block_cache_y = y;
+	m_block_cache = block;
+	
+	return block;
+}
+
+MapBlock * MapSector::getBlockNoCreate(s16 y)
+{
+	JMutexAutoLock lock(m_mutex);
+	
+	MapBlock *block = getBlockBuffered(y);
+
+	if(block == NULL)
+		throw InvalidPositionException();
+	
+	return block;
+}
+
+MapBlock * MapSector::createBlankBlockNoInsert(s16 y)
+{
+	// There should not be a block at this position
+	if(getBlockBuffered(y) != NULL)
+		throw AlreadyExistsException("Block already exists");
+
+	v3s16 blockpos_map(m_pos.X, y, m_pos.Y);
+	
+	MapBlock *block = new MapBlock(m_parent, blockpos_map);
+	
+	return block;
+}
+
+MapBlock * MapSector::createBlankBlock(s16 y)
+{
+	JMutexAutoLock lock(m_mutex);
+	
+	MapBlock *block = createBlankBlockNoInsert(y);
+	
+	m_blocks.insert(y, block);
+
+	return block;
+}
+
+void MapSector::insertBlock(MapBlock *block)
+{
+	s16 block_y = block->getPos().Y;
+
+	{
+		JMutexAutoLock lock(m_mutex);
+
+		MapBlock *block2 = getBlockBuffered(block_y);
+		if(block2 != NULL){
+			throw AlreadyExistsException("Block already exists");
+		}
+
+		v2s16 p2d(block->getPos().X, block->getPos().Z);
+		assert(p2d == m_pos);
+		
+		// Insert into container
+		m_blocks.insert(block_y, block);
+	}
+}
+
+void MapSector::removeBlock(MapBlock *block)
+{
+	s16 block_y = block->getPos().Y;
+
+	JMutexAutoLock lock(m_mutex);
+	
+	// Clear from cache
+	m_block_cache = NULL;
+	
+	// Remove from container
+	m_blocks.remove(block_y);
+}
+
+void MapSector::getBlocks(core::list<MapBlock*> &dest)
+{
+	JMutexAutoLock lock(m_mutex);
+
+	core::list<MapBlock*> ref_list;
+
+	core::map<s16, MapBlock*>::Iterator bi;
+
+	bi = m_blocks.getIterator();
+	for(; bi.atEnd() == false; bi++)
+	{
+		MapBlock *b = bi.getNode()->getValue();
+		dest.push_back(b);
+	}
+}
+
+/*
+	ServerMapSector
+*/
+
+ServerMapSector::ServerMapSector(NodeContainer *parent, v2s16 pos, u16 hm_split):
+		MapSector(parent, pos),
+		m_hm_split(hm_split),
+		m_objects(NULL)
+{
+	// hm_split has to be 1 or 2^x
+	assert(hm_split == 0 || hm_split == 1 || (hm_split & (hm_split-1)) == 0);
+	assert(hm_split * hm_split <= MAPSECTOR_FIXEDHEIGHTMAPS_MAXCOUNT);
+	
+	for(u16 i=0; i<hm_split*hm_split; i++)
+		m_heightmaps[i] = NULL;
+}
+
+ServerMapSector::~ServerMapSector()
+{
+	u16 hm_count = m_hm_split * m_hm_split;
+
+	// Write heightmaps
+	for(u16 i=0; i<hm_count; i++)
+	{
+		if(m_heightmaps[i])
+			delete m_heightmaps[i];
+	}
+
+	if(m_objects)
+		delete m_objects;
+}
+
+void ServerMapSector::setHeightmap(v2s16 hm_p, FixedHeightmap *hm)
+{
+	assert(isInArea(hm_p, m_hm_split));
+
+	s16 i = hm_p.Y * m_hm_split + hm_p.X;
+	
+	// Don't allow setting already set heightmaps as of now
+	assert(m_heightmaps[i] == NULL);
+	
+	/*std::cout<<"MapSector::setHeightmap for sector "
+			<<"("<<m_pos.X<<","<<m_pos.Y<<"): "
+			<<"Setting heightmap "
+			<<"("<<hm_p.X<<","<<hm_p.Y<<")"
+			<<" which is i="<<i
+			<<" to pointer "<<(long long)hm
+			<<std::endl;*/
+
+	m_heightmaps[i] = hm;
+	
+	differs_from_disk = true;
+}
+
+FixedHeightmap * ServerMapSector::getHeightmap(v2s16 hm_p)
+{
+	assert(isInArea(hm_p, m_hm_split));
+
+	s16 i = hm_p.Y * m_hm_split + hm_p.X;
+	
+	return m_heightmaps[i];
+}
+
+f32 ServerMapSector::getGroundHeight(v2s16 p, bool generate)
+{
+	// If no heightmaps
+	if(m_hm_split == 0)
+	{
+		/*std::cout<<"Sector has no heightmap"
+				<<" while trying to get height at ("<<p.X<<","<<p.Y<<")"
+				<<" for sector ("<<m_pos.X<<","<<m_pos.Y<<")"
+				<<std::endl;*/
+		return GROUNDHEIGHT_NOTFOUND_SETVALUE;
+	}
+	
+	// Side length of heightmap
+	s16 hm_d = MAP_BLOCKSIZE / m_hm_split;
+
+	// Position of selected heightmap
+	v2s16 hm_p = getContainerPos(p, hm_d);
+	if(isInArea(hm_p, m_hm_split) == false)
+	{
+		/*std::cout<<"Sector has no heightmap ("<<hm_p.X<<","<<hm_p.Y<<")"
+				<<" while trying to get height at ("<<p.X<<","<<p.Y<<")"
+				<<" for sector ("<<m_pos.X<<","<<m_pos.Y<<")"
+				<<std::endl;*/
+		return GROUNDHEIGHT_NOTFOUND_SETVALUE;
+	}
+
+	// Selected heightmap
+	FixedHeightmap *hm = m_heightmaps[hm_p.Y * m_hm_split + hm_p.X];
+
+	if(hm == NULL)
+	{
+		/*std::cout<<"Sector heightmap ("<<hm_p.X<<","<<hm_p.Y<<")"
+				" is NULL"
+				<<" while trying to get height at ("<<p.X<<","<<p.Y<<")"
+				<<" for sector ("<<m_pos.X<<","<<m_pos.Y<<")"
+				<<std::endl;*/
+		return GROUNDHEIGHT_NOTFOUND_SETVALUE;
+	}
+	
+	// Position in selected heighmap
+	v2s16 p_in_hm = p - hm_p * hm_d;
+	if(isInArea(p_in_hm, hm_d+1) == false)
+	{
+		/*std::cout<<"Position ("<<p_in_hm.X<<","<<p_in_hm.Y<<")"
+				" not in sector heightmap area"
+				<<" while trying to get height at ("<<p.X<<","<<p.Y<<")"
+				<<" for sector ("<<m_pos.X<<","<<m_pos.Y<<")"
+				<<std::endl;*/
+		return GROUNDHEIGHT_NOTFOUND_SETVALUE;
+	}
+	
+	f32 h = hm->getGroundHeight(p_in_hm);
+	
+	/*if(h < GROUNDHEIGHT_VALID_MINVALUE)
+	{
+		std::cout<<"Sector heightmap ("<<hm_p.X<<","<<hm_p.Y<<")"
+				" returned invalid value"
+				<<" while trying to get height at ("<<p.X<<","<<p.Y<<")"
+				<<" which is ("<<p_in_hm.X<<","<<p_in_hm.Y<<") in heightmap"
+				<<" for sector ("<<m_pos.X<<","<<m_pos.Y<<")"
+				<<std::endl;
+	}*/
+
+	return h;
+}
+
+void ServerMapSector::setGroundHeight(v2s16 p, f32 y, bool generate)
+{
+	/*
+		NOTE:
+		This causes glitches because the sector cannot be actually
+		modified according to heightmap changes.
+
+		This is useful when generating continued sub-heightmaps
+		inside the sector.
+	*/
+
+	// If no heightmaps
+	if(m_hm_split == 0)
+		return;
+	
+	// Side length of heightmap
+	s16 hm_d = MAP_BLOCKSIZE / m_hm_split;
+
+	// Position of selected heightmap
+	v2s16 hm_p = getContainerPos(p, hm_d);
+	if(isInArea(hm_p, m_hm_split) == false)
+		return;
+
+	// Selected heightmap
+	FixedHeightmap *hm = m_heightmaps[hm_p.Y * m_hm_split + hm_p.X];
+
+	if(hm == NULL)
+		return;
+	
+	// Position in selected heighmap
+	v2s16 p_in_hm = p - hm_p * hm_d;
+	if(isInArea(p_in_hm, hm_d) == false)
+		return;
+	
+	hm->setGroundHeight(p_in_hm, y);
+	
+	differs_from_disk = true;
+}
+
+void ServerMapSector::serialize(std::ostream &os, u8 version)
+{
+	if(!ser_ver_supported(version))
+		throw VersionMismatchException("ERROR: MapSector format not supported");
+	
+	/*
+		[0] u8 serialization version
+		+ heightmap data
+	*/
+	
+	// Server has both of these, no need to support not having them.
+	assert(m_objects != NULL);
+
+	// Write version
+	os.write((char*)&version, 1);
+	
+	/*
+		Serialize heightmap(s)
+	*/
+
+	// Version with single heightmap
+	if(version <= 7)
+	{
+		u32 heightmap_size =
+				FixedHeightmap::serializedLength(version, MAP_BLOCKSIZE);
+		
+		SharedBuffer<u8> data(heightmap_size);
+		m_heightmaps[0]->serialize(*data, version);
+
+		os.write((const char*)*data, heightmap_size);
+		
+		if(version >= 5)
+		{
+			/*
+				Write objects
+			*/
+			
+			u16 object_count;
+			if(m_objects->size() > 65535)
+				object_count = 65535;
+			else
+				object_count = m_objects->size();
+
+			u8 b[2];
+			writeU16(b, object_count);
+			os.write((char*)b, 2);
+			
+			core::map<v3s16, u8>::Iterator i;
+			i = m_objects->getIterator();
+			for(; i.atEnd() == false; i++)
+			{
+				v3s16 p = i.getNode()->getKey();
+				u8 d = i.getNode()->getValue();
+				u8 b[7];
+				writeV3S16(&b[0], p);
+				b[6] = d;
+				os.write((char*)b, 7);
+			}
+		}
+	}
+	// Version with multiple heightmaps
+	else
+	{
+		u8 buf[2];
+		
+		if(m_hm_split > 255)
+			throw SerializationError("Sector has too many heightmaps");
+		
+		// Write heightmap split ratio
+		writeU8(buf, m_hm_split);
+		os.write((char*)buf, 1);
+
+		// If there are heightmaps, write them
+		if(m_hm_split != 0)
+		{
+			u16 hm_d = MAP_BLOCKSIZE / m_hm_split;
+
+			u32 hm_size = FixedHeightmap::serializedLength(version, hm_d);
+			SharedBuffer<u8> data(hm_size);
+			
+			u16 hm_count = m_hm_split * m_hm_split;
+
+			// Write heightmaps
+			for(u16 i=0; i<hm_count; i++)
+			{
+				m_heightmaps[i]->serialize(*data, version);
+				os.write((const char*)*data, hm_size);
+			}
+		}
+	
+		/*
+			Write objects
+		*/
+		
+		u16 object_count;
+		if(m_objects->size() > 65535)
+			object_count = 65535;
+		else
+			object_count = m_objects->size();
+
+		u8 b[2];
+		writeU16(b, object_count);
+		os.write((char*)b, 2);
+		
+		core::map<v3s16, u8>::Iterator i;
+		i = m_objects->getIterator();
+		for(; i.atEnd() == false; i++)
+		{
+			v3s16 p = i.getNode()->getKey();
+			u8 d = i.getNode()->getValue();
+			u8 b[7];
+			writeV3S16(&b[0], p);
+			b[6] = d;
+			os.write((char*)b, 7);
+		}
+	}
+}
+
+ServerMapSector* ServerMapSector::deSerialize(
+		std::istream &is,
+		NodeContainer *parent,
+		v2s16 p2d,
+		Heightmap *master_hm,
+		core::map<v2s16, MapSector*> & sectors
+	)
+{
+	/*
+		[0] u8 serialization version
+		+ heightmap data
+	*/
+
+	/*
+		Read stuff
+	*/
+	
+	// Read version
+	u8 version = SER_FMT_VER_INVALID;
+	is.read((char*)&version, 1);
+	
+	if(!ser_ver_supported(version))
+		throw VersionMismatchException("ERROR: MapSector format not supported");
+	
+	/*
+		Read heightmap(s)
+	*/
+
+	FixedHeightmap *hms[MAPSECTOR_FIXEDHEIGHTMAPS_MAXCOUNT];
+	u16 hm_split = 0;
+	
+	// Version with a single heightmap
+	if(version <= 7)
+	{
+		hm_split = 1;
+
+		u32 hm_size =
+				FixedHeightmap::serializedLength(version, MAP_BLOCKSIZE);
+		
+		SharedBuffer<u8> data(hm_size);
+		is.read((char*)*data, hm_size);
+
+		hms[0] = new FixedHeightmap(master_hm, p2d, MAP_BLOCKSIZE);
+		hms[0]->deSerialize(*data, version);
+	}
+	// Version with multiple heightmaps
+	else
+	{
+		u8 buf[2];
+
+		// Read split ratio
+		is.read((char*)buf, 1);
+		hm_split = readU8(buf);
+
+		// If there are heightmaps, read them
+		if(hm_split != 0)
+		{
+			u16 hm_count = hm_split * hm_split;
+
+			if(hm_count > MAPSECTOR_FIXEDHEIGHTMAPS_MAXCOUNT)
+				throw SerializationError("Sector has too many heightmaps");
+			
+			u16 hm_d = MAP_BLOCKSIZE / hm_split;
+
+			u32 hm_size = FixedHeightmap::serializedLength(version, hm_d);
+			
+			u16 i=0;
+			for(s16 y=0; y<hm_split; y++)
+			for(s16 x=0; x<hm_split; x++)
+			{
+				SharedBuffer<u8> data(hm_size);
+				is.read((char*)*data, hm_size);
+
+				hms[i] = new FixedHeightmap(master_hm, p2d+v2s16(x,y), hm_d);
+				hms[i]->deSerialize(*data, version);
+				i++;
+			}
+		}
+	}
+
+	/*
+		Read objects
+	*/
+
+	core::map<v3s16, u8> *objects = new core::map<v3s16, u8>;
+
+	if(version >= 5)
+	{
+		u8 b[2];
+		is.read((char*)b, 2);
+		u16 object_count = readU16(b);
+
+		for(u16 i=0; i<object_count; i++)
+		{
+			u8 b[7];
+			is.read((char*)b, 7);
+			v3s16 p = readV3S16(&b[0]);
+			u8 d = b[6];
+			objects->insert(p, d);
+		}
+	}
+	
+	/*
+		Get or create sector
+	*/
+
+	ServerMapSector *sector = NULL;
+
+	core::map<v2s16, MapSector*>::Node *n = sectors.find(p2d);
+
+	if(n != NULL)
+	{
+		dstream<<"deSerializing existent sectors not supported "
+				"at the moment, because code hasn't been tested."
+				<<std::endl;
+		assert(0);
+		// NOTE: At least hm_split mismatch would have to be checked
+		
+		//sector = n->getValue();
+	}
+	else
+	{
+		sector = new ServerMapSector(parent, p2d, hm_split);
+		sectors.insert(p2d, sector);
+	}
+
+	/*
+		Set stuff in sector
+	*/
+
+	// Set heightmaps
+	
+	sector->m_hm_split = hm_split;
+
+	u16 hm_count = hm_split * hm_split;
+
+	for(u16 i=0; i<hm_count; i++)
+	{
+		// Set (or change) heightmap
+		FixedHeightmap *oldhm = sector->m_heightmaps[i];
+		sector->m_heightmaps[i] = hms[i];
+		if(oldhm != NULL)
+			delete oldhm;
+	}
+	
+	// Set (or change) objects
+	core::map<v3s16, u8> *oldfo = sector->m_objects;
+	sector->m_objects = objects;
+	if(oldfo)
+		delete oldfo;
+
+	return sector;
+}
+
+/*
+	ClientMapSector
+*/
+
+ClientMapSector::ClientMapSector(NodeContainer *parent, v2s16 pos):
+		MapSector(parent, pos)
+{
+}
+
+ClientMapSector::~ClientMapSector()
+{
+}
+
+void ClientMapSector::deSerialize(std::istream &is)
+{
+	/*
+		[0] u8 serialization version
+		[1] s16 corners[0]
+		[3] s16 corners[1]
+		[5] s16 corners[2]
+		[7] s16 corners[3]
+		size = 9
+		
+		In which corners are in these positions
+		v2s16(0,0),
+		v2s16(1,0),
+		v2s16(1,1),
+		v2s16(0,1),
+	*/
+	
+	// Read version
+	u8 version = SER_FMT_VER_INVALID;
+	is.read((char*)&version, 1);
+	
+	if(!ser_ver_supported(version))
+		throw VersionMismatchException("ERROR: MapSector format not supported");
+	if(version <= 7)
+		throw VersionMismatchException("ERROR: MapSector format not supported");
+	
+	u8 buf[2];
+	
+	// Read corners
+	is.read((char*)buf, 2);
+	s16 c0 = readU16(buf);
+	is.read((char*)buf, 2);
+	s16 c1 = readU16(buf);
+	is.read((char*)buf, 2);
+	s16 c2 = readU16(buf);
+	is.read((char*)buf, 2);
+	s16 c3 = readU16(buf);
+	
+	/*
+		Set stuff in sector
+	*/
+	
+	m_corners[0] = c0;
+	m_corners[1] = c1;
+	m_corners[2] = c2;
+	m_corners[3] = c3;
+}
+
+//END
-- 
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