summaryrefslogtreecommitdiffstats
path: root/src/BlockEntities/BlockEntity.h
blob: 6c69e8260dfd5390ab47e413e3b84b76d7457a7c (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150

#pragma once





/** Place this macro in the declaration of each cBlockEntity descendant. */
#define BLOCKENTITY_PROTODEF(classname) \
	virtual bool IsA(const char * a_ClassName) const override \
	{ \
		return ((a_ClassName != nullptr) && ((strcmp(a_ClassName, #classname) == 0) || Super::IsA(a_ClassName))); \
	} \
	virtual const char * GetClass(void) const override \
	{ \
		return #classname; \
	} \
	static const char * GetClassStatic(void) \
	{ \
		return #classname; \
	} \
	virtual const char * GetParentClass(void) const override \
	{ \
		return Super::GetClass(); \
	}





class cChunk;
class cPlayer;
class cWorld;





// tolua_begin
class cBlockEntity
{
protected:
	cBlockEntity(BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta, int a_BlockX, int a_BlockY, int a_BlockZ, cWorld * a_World) :
		m_PosX(a_BlockX),
		m_PosY(a_BlockY),
		m_PosZ(a_BlockZ),
		m_RelX(a_BlockX - cChunkDef::Width * FAST_FLOOR_DIV(a_BlockX, cChunkDef::Width)),
		m_RelZ(a_BlockZ - cChunkDef::Width * FAST_FLOOR_DIV(a_BlockZ, cChunkDef::Width)),
		m_BlockType(a_BlockType),
		m_BlockMeta(a_BlockMeta),
		m_World(a_World)
	{
	}

public:
	// tolua_end

	virtual ~cBlockEntity() {}  // force a virtual destructor in all descendants

	virtual void Destroy(void) {}

	void SetWorld(cWorld * a_World)
	{
		m_World = a_World;
	}

	/** Creates a new block entity for the specified block type
	If a_World is valid, then the entity is created bound to that world
	Returns nullptr for unknown block types. */
	static cBlockEntity * CreateByBlockType(BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta, int a_BlockX, int a_BlockY, int a_BlockZ, cWorld * a_World = nullptr);

	/** Makes an exact copy of this block entity, except for its m_World (set to nullptr), and at a new position.
	Uses CopyFrom() to copy the properties. */
	cBlockEntity * Clone(int a_BlockX, int a_BlockY, int a_BlockZ);

	/** Copies all properties of a_Src into this entity, except for its m_World and location.
	Each non-abstract descendant should override to copy its specific properties, and call
	Super::CopyFrom(a_Src) to copy the common ones. */
	virtual void CopyFrom(const cBlockEntity & a_Src);

	static const char * GetClassStatic(void)  // Needed for ManualBindings's ForEach templates
	{
		return "cBlockEntity";
	}

	/** Returns true if the object is the specified class, or its descendant. */
	virtual bool IsA(const char * a_ClassName) const { return (strcmp(a_ClassName, "cBlockEntity") == 0); }

	/** Returns the name of the tompost class (the most descendant). Used for Lua bindings to push the correct object type. */
	virtual const char * GetClass(void) const { return GetClassStatic(); }

	/** Returns the name of the parent class, or empty string if no parent class. */
	virtual const char * GetParentClass(void) const { return ""; }

	// tolua_begin

	// Position, in absolute block coordinates:
	Vector3i GetPos(void) const { return Vector3i{m_PosX, m_PosY, m_PosZ}; }
	int GetPosX(void) const { return m_PosX; }
	int GetPosY(void) const { return m_PosY; }
	int GetPosZ(void) const { return m_PosZ; }

	BLOCKTYPE GetBlockType(void) const { return m_BlockType; }

	cWorld * GetWorld(void) const { return m_World; }

	int GetChunkX(void) const { return FAST_FLOOR_DIV(m_PosX, cChunkDef::Width); }
	int GetChunkZ(void) const { return FAST_FLOOR_DIV(m_PosZ, cChunkDef::Width); }

	int GetRelX(void) const { return m_RelX; }
	int GetRelZ(void) const { return m_RelZ; }

	// tolua_end

	/** Called when a player uses this entity; should open the UI window.
	returns true if the use was successful, return false to use the block as a "normal" block */
	virtual bool UsedBy( cPlayer * a_Player) = 0;

	/** Sends the packet defining the block entity to the client specified.
	To send to all eligible clients, use cWorld::BroadcastBlockEntity() */
	virtual void SendTo(cClientHandle & a_Client) = 0;

	/** Ticks the entity; returns true if the chunk should be marked as dirty as a result of this ticking. By default does nothing. */
	virtual bool Tick(std::chrono::milliseconds a_Dt, cChunk & a_Chunk)
	{
		UNUSED(a_Dt);
		return false;
	}

protected:
	/** Position in absolute block coordinates */
	int m_PosX, m_PosY, m_PosZ;

	/** Position relative to the chunk, used to speed up ticking */
	int m_RelX, m_RelZ;

	/** The blocktype representing this particular instance in the world.
	Mainly used for multi-block-type entities, such as furnaces / lit furnaces. */
	BLOCKTYPE m_BlockType;

	/** The block meta representing this particular instance in the world
	Mainly used for directional entities, such as dispensers. */
	NIBBLETYPE m_BlockMeta;

	cWorld * m_World;
} ;  // tolua_export