Initial files

src/mapblock.h

@@ -0,0 +1,404 @@
+/*
+(c) 2010 Perttu Ahola <celeron55@gmail.com>
+*/
+
+#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 "mapblockobject.h"
+
+#define MAP_BLOCKSIZE 16
+
+// Named by looking towards z+
+enum{
+	FACE_BACK=0,
+	FACE_TOP,
+	FACE_RIGHT,
+	FACE_FRONT,
+	FACE_BOTTOM,
+	FACE_LEFT
+};
+
+struct FastFace
+{
+	u8 material;
+	video::S3DVertex vertices[4]; // Precalculated vertices
+};
+
+enum
+{
+	NODECONTAINER_ID_MAPBLOCK,
+	NODECONTAINER_ID_MAPSECTOR,
+	NODECONTAINER_ID_MAP
+};
+
+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;
+};
+
+class MapBlock : public NodeContainer
+{
+private:
+
+	NodeContainer *m_parent;
+	// Position in blocks on parent
+	v3s16 m_pos;
+	/*
+		If NULL, block is a dummy block.
+		Dummy blocks are used for caching not-found-on-disk blocks.
+	*/
+	MapNode * data;
+	/*
+		- On the client, this is used for checking whether to
+		  recalculate the face cache. (Is it anymore?)
+		- On the server, this is used for telling whether the
+		  block has been changed from the one on disk.
+	*/
+	bool changed;
+	/*
+		Used for some initial lighting stuff.
+		At least /has been/ used. 8)
+	*/
+	bool is_underground;
+	
+	MapBlockObjectList m_objects;
+	
+public:
+
+	/*
+		This used by Server's block creation stuff for not sending
+		blocks that are waiting a lighting update.
+
+		If true, the block needs some work by the one who set this
+		to true.
+
+		While true, nobody else should touch the block.
+	*/
+	//bool is_incomplete;
+	
+	scene::SMesh *mesh;
+	JMutex mesh_mutex;
+
+	MapBlock(NodeContainer *parent, v3s16 pos, bool dummy=false):
+			m_parent(parent),
+			m_pos(pos),
+			changed(true),
+			is_underground(false),
+			m_objects(this)
+			//is_incomplete(false)
+	{
+		data = NULL;
+		if(dummy == false)
+			reallocate();
+		mesh_mutex.Init();
+		mesh = NULL;
+	}
+
+	~MapBlock()
+	{
+		{
+			JMutexAutoLock lock(mesh_mutex);
+			
+			if(mesh != NULL)
+			{
+				mesh->drop();
+				mesh = NULL;
+			}
+		}
+
+		if(data)
+			delete[] data;
+	}
+	
+	virtual u16 nodeContainerId() const
+	{
+		return NODECONTAINER_ID_MAPBLOCK;
+	}
+
+	NodeContainer * getParent()
+	{
+		return m_parent;
+	}
+
+	bool isDummy()
+	{
+		return (data == NULL);
+	}
+
+	void unDummify()
+	{
+		assert(isDummy());
+		reallocate();
+	}
+	
+	bool getChangedFlag()
+	{
+		return changed;
+	}
+
+	void resetChangedFlag()
+	{
+		changed = false;
+	}
+
+	void setChangedFlag()
+	{
+		changed = true;
+	}
+
+	v3s16 getPos()
+	{
+		return m_pos;
+	}
+		
+	v3s16 getPosRelative()
+	{
+		return m_pos * MAP_BLOCKSIZE;
+	}
+		
+	bool getIsUnderground()
+	{
+		return is_underground;
+	}
+
+	void setIsUnderground(bool a_is_underground)
+	{
+		is_underground = a_is_underground;
+		setChangedFlag();
+	}
+
+	core::aabbox3d<s16> getBox()
+	{
+		return core::aabbox3d<s16>(getPosRelative(),
+				getPosRelative()
+				+ v3s16(MAP_BLOCKSIZE, MAP_BLOCKSIZE, MAP_BLOCKSIZE)
+				- v3s16(1,1,1));
+	}
+	
+	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();
+		}
+		setChangedFlag();
+	}
+
+	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);
+	}
+
+	/*
+		Regular MapNode get-setters
+	*/
+	
+	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);
+	}
+	
+	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;
+		setChangedFlag();
+	}
+	
+	void setNode(v3s16 p, MapNode & n)
+	{
+		setNode(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);
+
+	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);
+	}
+
+	static FastFace * makeFastFace(u8 material, u8 light, v3f p,
+			v3f dir, v3f scale, v3f posRelative_f);
+	
+	u8 getFaceLight(v3s16 p, v3s16 face_dir);
+	
+	/*
+		Gets node material from any place relative to block.
+		Returns MATERIAL_AIR if doesn't exist.
+	*/
+	u8 getNodeMaterial(v3s16 p);
+
+	/*
+		startpos:
+		translate_dir: unit vector with only one of x, y or z
+		face_dir: unit vector with only one of x, y or z
+	*/
+	void updateFastFaceRow(v3s16 startpos,
+			u16 length,
+			v3s16 translate_dir,
+			v3s16 face_dir,
+			core::list<FastFace*> &dest);
+
+	void updateMesh();
+
+	bool propagateSunlight(core::map<v3s16, bool> & light_sources);
+	
+	// Doesn't write version by itself
+	void serialize(std::ostream &os, u8 version);
+
+	void deSerialize(std::istream &is, u8 version);
+	
+	void serializeObjects(std::ostream &os, u8 version)
+	{
+		m_objects.serialize(os, version);
+	}
+	// If smgr!=NULL, new objects are added to the scene
+	void updateObjects(std::istream &is, u8 version,
+			scene::ISceneManager *smgr)
+	{
+		m_objects.update(is, version, smgr);
+
+		setChangedFlag();
+	}
+	void clearObjects()
+	{
+		m_objects.clear();
+
+		setChangedFlag();
+	}
+	void addObject(MapBlockObject *object)
+			throw(ContainerFullException, AlreadyExistsException)
+	{
+		m_objects.add(object);
+
+		setChangedFlag();
+	}
+	void removeObject(s16 id)
+	{
+		m_objects.remove(id);
+
+		setChangedFlag();
+	}
+	MapBlockObject * getObject(s16 id)
+	{
+		return m_objects.get(id);
+	}
+	JMutexAutoLock * getObjectLock()
+	{
+		return m_objects.getLock();
+	}
+	void stepObjects(float dtime, bool server)
+	{
+		m_objects.step(dtime, server);
+
+		setChangedFlag();
+	}
+
+	/*void wrapObject(MapBlockObject *object)
+	{
+		m_objects.wrapObject(object);
+
+		setChangedFlag();
+	}*/
+
+	// origin is relative to block
+	void getObjects(v3f origin, f32 max_d,
+			core::array<DistanceSortedObject> &dest)
+	{
+		m_objects.getObjects(origin, max_d, dest);
+	}
+
+private:
+
+	/*
+		Used only internally, because changes can't be tracked
+	*/
+
+	MapNode & getNodeRef(s16 x, s16 y, s16 z)
+	{
+		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);
+	}
+};
+
+inline bool blockpos_over_limit(v3s16 p)
+{
+	return
+	  (p.X < -MAP_GENERATION_LIMIT / MAP_BLOCKSIZE
+	|| p.X >  MAP_GENERATION_LIMIT / MAP_BLOCKSIZE
+	|| p.Y < -MAP_GENERATION_LIMIT / MAP_BLOCKSIZE
+	|| p.Y >  MAP_GENERATION_LIMIT / MAP_BLOCKSIZE
+	|| p.Z < -MAP_GENERATION_LIMIT / MAP_BLOCKSIZE
+	|| p.Z >  MAP_GENERATION_LIMIT / MAP_BLOCKSIZE);
+}
+
+/*
+	Returns the position of the block where the node is located
+*/
+inline v3s16 getNodeBlockPos(v3s16 p)
+{
+	return getContainerPos(p, MAP_BLOCKSIZE);
+}
+
+inline v2s16 getNodeSectorPos(v2s16 p)
+{
+	return getContainerPos(p, MAP_BLOCKSIZE);
+}
+
+inline s16 getNodeBlockY(s16 y)
+{
+	return getContainerPos(y, MAP_BLOCKSIZE);
+}
+
+#endif
+