data/mineral_iron.png

/*
Minetest-c55
Copyright (C) 2010 celeron55, Perttu Ahola <celeron55@gmail.com>

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/

#ifndef MAPBLOCK_HEADER
#define MAPBLOCK_HEADER

#include <jmutex.h>
#include <jmutexautolock.h>
#include <exception>
#include "debug.h"
#include "common_irrlicht.h"
#include "mapnode.h"
#include "exceptions.h"
#include "serialization.h"
#include "constants.h"
#include "voxel.h"
#include "staticobject.h"
#include "modifiedstate.h"

class Map;
class NodeMetadataList;
class IGameDef;
class MapBlockMesh;

#define BLOCK_TIMESTAMP_UNDEFINED 0xffffffff

/*// Named by looking towards z+
enum{
	FACE_BACK=0,
	FACE_TOP,
	FACE_RIGHT,
	FACE_FRONT,
	FACE_BOTTOM,
	FACE_LEFT
};*/

// NOTE: If this is enabled, set MapBlock to be initialized with
//       CONTENT_IGNORE.
/*enum BlockGenerationStatus
{
	// Completely non-generated (filled with CONTENT_IGNORE).
	BLOCKGEN_UNTOUCHED=0,
	// Trees or similar might have been blitted from other blocks to here.
	// Otherwise, the block contains CONTENT_IGNORE
	BLOCKGEN_FROM_NEIGHBORS=2,
	// Has been generated, but some neighbors might put some stuff in here
	// when they are generated.
	// Does not contain any CONTENT_IGNORE
	BLOCKGEN_SELF_GENERATED=4,
	// The block and all its neighbors have been generated
	BLOCKGEN_FULLY_GENERATED=6
};*/

#if 0
enum
{
	NODECONTAINER_ID_MAPBLOCK,
	NODECONTAINER_ID_MAPSECTOR,
	NODECONTAINER_ID_MAP,
	NODECONTAINER_ID_MAPBLOCKCACHE,
	NODECONTAINER_ID_VOXELMANIPULATOR,
};

class NodeContainer
{
public:
	virtual bool isValidPosition(v3s16 p) = 0;
	virtual MapNode getNode(v3s16 p) = 0;
	virtual void setNode(v3s16 p, MapNode & n) = 0;
	virtual u16 nodeContainerId() const = 0;

	MapNode getNodeNoEx(v3s16 p)
	{
		try{
			return getNode(p);
		}
		catch(InvalidPositionException &e){
			return MapNode(CONTENT_IGNORE);
		}
	}
};
#endif

/*
	MapBlock itself
*/

class MapBlock /*: public NodeContainer*/
{
public:
	MapBlock(Map *parent, v3s16 pos, IGameDef *gamedef, bool dummy=false);
	~MapBlock();
	
	/*virtual u16 nodeContainerId() const
	{
		return NODECONTAINER_ID_MAPBLOCK;
	}*/
	
	Map * getParent()
	{
		return m_parent;
	}

	void reallocate()
	{
		if(data != NULL)
			delete[] data;
		u32 l = MAP_BLOCKSIZE * MAP_BLOCKSIZE * MAP_BLOCKSIZE;
		data = new MapNode[l];
		for(u32 i=0; i<l; i++){
			//data[i] = MapNode();
			data[i] = MapNode(CONTENT_IGNORE);
		}
		raiseModified(MOD_STATE_WRITE_NEEDED, "reallocate");
	}

	/*
		Flags
	*/

	bool isDummy()
	{
		return (data == NULL);
	}
	void unDummify()
	{
		assert(isDummy());
		reallocate();
	}
	
	// m_modified methods
	void raiseModified(u32 mod, const std::string &reason="unknown")
	{
		if(mod > m_modified){
			m_modified = mod;
			m_modified_reason = reason;
			m_modified_reason_too_long = false;

			if(m_modified >= MOD_STATE_WRITE_AT_UNLOAD){
				m_disk_timestamp = m_timestamp;
			}
		} else if(mod == m_modified){
			if(!m_modified_reason_too_long){
				if(m_modified_reason.size() < 40)
					m_modified_reason += ", " + reason;
				else{
					m_modified_reason += "...";
					m_modified_reason_too_long = true;
				}
			}
		}
	}
	u32 getModified()
	{
		return m_modified;
	}
	std::string getModifiedReason()
	{
		return m_modified_reason;
	}
	void resetModified()
	{
		m_modified = MOD_STATE_CLEAN;
		m_modified_reason = "none";
		m_modified_reason_too_long = false;
	}
	
	// is_underground getter/setter
	bool getIsUnderground()
	{
		return is_underground;
	}
	void setIsUnderground(bool a_is_underground)
	{
		is_underground = a_is_underground;
		raiseModified(MOD_STATE_WRITE_NEEDED, "setIsUnderground");
	}

	void setLightingExpired(bool expired)
	{
		if(expired != m_lighting_expired){
			m_lighting_expired = expired;
			raiseModified(MOD_STATE_WRITE_NEEDED, "setLightingExpired");
		}
	}
	bool getLightingExpired()
	{
		return m_lighting_expired;
	}

	bool isGenerated()
	{
		return m_generated;
	}
	void setGenerated(bool b)
	{
		if(b != m_generated){
			raiseModified(MOD_STATE_WRITE_NEEDED, "setGenerated");
			m_generated = b;
		}
	}

	bool isValid()
	{
		if(m_lighting_expired)
			return false;
		if(data == NULL)
			return false;
		return true;
	}

	/*
		Position stuff
	*/

	v3s16 getPos()
	{
		return m_pos;
	}
		
	v3s16 getPosRelative()
	{
		return m_pos * MAP_BLOCKSIZE;
	}
		
	core::aabbox3d<s16> getBox()
	{
		return core::aabbox3d<s16>(getPosRelative(),
				getPosRelative()
				+ v3s16(MAP_BLOCKSIZE, MAP_BLOCKSIZE, MAP_BLOCKSIZE)
				- v3s16(1,1,1));
	}

	/*
		Regular MapNode get-setters
	*/
	
	bool isValidPosition(v3s16 p)
	{
		if(data == NULL)
			return false;
		return (p.X >= 0 && p.X < MAP_BLOCKSIZE
				&& p.Y >= 0 && p.Y < MAP_BLOCKSIZE
				&& p.Z >= 0 && p.Z < MAP_BLOCKSIZE);
	}

	MapNode getNode(s16 x, s16 y, s16 z)
	{
		if(data == NULL)
			throw InvalidPositionException();
		if(x < 0 || x >= MAP_BLOCKSIZE) throw InvalidPositionException();
		if(y < 0 || y >= MAP_BLOCKSIZE) throw InvalidPositionException();
		if(z < 0 || z >= MAP_BLOCKSIZE) throw InvalidPositionException();
		return data[z*MAP_BLOCKSIZE*MAP_BLOCKSIZE + y*MAP_BLOCKSIZE + x];
	}
	
	MapNode getNode(v3s16 p)
	{
		return getNode(p.X, p.Y, p.Z);
	}
	
	MapNode getNodeNoEx(v3s16 p)
	{
		try{
			return getNode(p.X, p.Y, p.Z);
		}catch(InvalidPositionException &e){
			return MapNode(CONTENT_IGNORE);
		}
	}
	
	void setNode(s16 x, s16 y, s16 z, MapNode & n)
	{
		if(data == NULL)
			throw InvalidPositionException();
		if(x < 0 || x >= MAP_BLOCKSIZE) throw InvalidPositionException();
		if(y < 0 || y >= MAP_BLOCKSIZE) throw InvalidPositionException();
		if(z < 0 || z >= MAP_BLOCKSIZE) throw InvalidPositionException();
		data[z*MAP_BLOCKSIZE*MAP_BLOCKSIZE + y*MAP_BLOCKSIZE + x] = n;
		raiseModified(MOD_STATE_WRITE_NEEDED, "setNode");
	}
	
	void setNode(v3s16 p, MapNode & n)
	{
		setNode(p.X, p.Y, p.Z, n);
	}

	/*
		Non-checking variants of the above
	*/

	MapNode getNodeNoCheck(s16 x, s16 y, s16 z)
	{
		if(data == NULL)
			throw InvalidPositionException();
		return data[z*MAP_BLOCKSIZE*MAP_BLOCKSIZE + y*MAP_BLOCKSIZE + x];
	}
	
	MapNode getNodeNoCheck(v3s16 p)
	{
		return getNodeNoCheck(p.X, p.Y, p.Z);
	}
	
	void setNodeNoCheck(s16 x, s16 y, s16 z, MapNode & n)
	{
		if(data == NULL)
			throw InvalidPositionException();
		data[z*MAP_BLOCKSIZE*MAP_BLOCKSIZE + y*MAP_BLOCKSIZE + x] = n;
		raiseModified(MOD_STATE_WRITE_NEEDED, "setNodeNoCheck");
	}
	
	void setNodeNoCheck(v3s16 p, MapNode & n)
	{
		setNodeNoCheck(p.X, p.Y, p.Z, n);
	}

	/*
		These functions consult the parent container if the position
		is not valid on this MapBlock.
	*/
	bool isValidPositionParent(v3s16 p);
	MapNode getNodeParent(v3s16 p);
	void setNodeParent(v3s16 p, MapNode & n);
	MapNode getNodeParentNoEx(v3s16 p);

	void drawbox(s16 x0, s16 y0, s16 z0, s16 w, s16 h, s16 d, MapNode node)
	{
		for(u16 z=0; z<d; z++)
			for(u16 y=0; y<h; y++)
				for(u16 x=0; x<w; x++)
					setNode(x0+x, y0+y, z0+z, node);
	}

	// See comments in mapblock.cpp
	bool propagateSunlight(core::map<v3s16, bool> & light_sources,
			bool remove_light=false, bool *black_air_left=NULL);
	
	// Copies data to VoxelManipulator to getPosRelative()
	void copyTo(VoxelManipulator &dst);
	// Copies data from VoxelManipulator getPosRelative()
	void copyFrom(VoxelManipulator &dst);

	/*
		Update day-night lighting difference flag.
		Sets m_day_night_differs to appropriate value.
		These methods don't care about neighboring blocks.
	*/
	void updateDayNightDiff();

	bool dayNightDiffed()
	{
		return m_day_night_differs;
	}

	/*
		Miscellaneous stuff
	*/
	
	/*
		Tries to measure ground level.
		Return value:
			-1 = only air
			-2 = only ground
			-3 = random fail
			0...MAP_BLOCKSIZE-1 = ground level
	*/
	s16 getGroundLevel(v2s16 p2d);

	/*
		Timestamp (see m_timestamp)
		NOTE: BLOCK_TIMESTAMP_UNDEFINED=0xffffffff means there is no timestamp.
	*/
	void setTimestamp(u32 time)
	{
		m_timestamp = time;
		raiseModified(MOD_STATE_WRITE_AT_UNLOAD, "setTimestamp");
	}
	void setTimestampNoChangedFlag(u32 time)
	{
		m_timestamp = time;
	}
	u32 getTimestamp()
	{
		return m_timestamp;
	}
	u32 getDiskTimestamp()
	{
		return m_disk_timestamp;
	}
	
	/*
		See m_usage_timer
	*/
	void resetUsageTimer()
	{
		m_usage_timer = 0;
	}
	void incrementUsageTimer(float dtime)
	{
		m_usage_timer += dtime;
	}
	u32 getUsageTimer()
	{
		return m_usage_timer;
	}

	/*
		Serialization
	*/
	
	// These don't write or read version by itself
	// Set disk to true for on-disk format, false for over-the-network format
	void serialize(std::ostream &os, u8 version, bool disk);
	// If disk == true: In addition to doing other things, will add
	// unknown blocks from id-name mapping to wndef
	void deSerialize(std::istream &is, u8 version, bool disk);

private:
	/*
		Private methods
	*/

	void serialize_pre22(std::ostream &os, u8 version, bool disk);
	void deSerialize_pre22(std::istream &is, u8 version, bool disk);

	/*
		Used only internally, because changes can't be tracked
	*/

	MapNode & getNodeRef(s16 x, s16 y, s16 z)
	{
		if(data == NULL)
			throw InvalidPositionException();
		if(x < 0 || x >= MAP_BLOCKSIZE) throw InvalidPositionException();
		if(y < 0 || y >= MAP_BLOCKSIZE) throw InvalidPositionException();
		if(z < 0 || z >= MAP_BLOCKSIZE) throw InvalidPositionException();
		return data[z*MAP_BLOCKSIZE*MAP_BLOCKSIZE + y*MAP_BLOCKSIZE + x];
	}
	MapNode & getNodeRef(v3s16 &p)
	{
		return getNodeRef(p.X, p.Y, p.Z);
	}

public:
	/*
		Public member variables
	*/

#ifndef SERVER // Only on client
	MapBlockMesh *mesh;
	//JMutex mesh_mutex;
#endif
	
	NodeMetadataList *m_node_metadata;
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