summaryrefslogtreecommitdiffstats
path: root/src/Blocks/BlockPiston.h
blob: 82f07995439c7cb3a5b3b0e1da26d850b45ad817 (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
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186

#pragma once

#include "BlockHandler.h"

#include <unordered_set>


class cWorld;


class cBlockPistonHandler :
	public cBlockHandler
{
public:
	cBlockPistonHandler(BLOCKTYPE a_BlockType);
	
	virtual void OnDestroyed(cChunkInterface & a_ChunkInterface, cWorldInterface & a_WorldInterface, int a_BlockX, int a_BlockY, int a_BlockZ) override;

	virtual void ConvertToPickups(cItems & a_Pickups, NIBBLETYPE a_BlockMeta) override;

	virtual bool GetPlacementBlockTypeMeta(
		cChunkInterface & a_ChunkInterface, cPlayer * a_Player,
		int a_BlockX, int a_BlockY, int a_BlockZ, eBlockFace a_BlockFace,
		int a_CursorX, int a_CursorY, int a_CursorZ,
		BLOCKTYPE & a_BlockType, NIBBLETYPE & a_BlockMeta
	) override;

	static NIBBLETYPE RotationPitchToMetaData(double a_Rotation, double a_Pitch)
	{
		if (a_Pitch >= 50)
		{
			return 0x1;
		}
		else if (a_Pitch <= -50)
		{
			return 0x0;
		}
		else
		{
			a_Rotation += 90 + 45;  // So its not aligned with axis

			if (a_Rotation > 360)
			{
				a_Rotation -= 360;
			}
			if ((a_Rotation >= 0) && (a_Rotation < 90))
			{
				return 0x4;
			}
			else if ((a_Rotation >= 180) && (a_Rotation < 270))
			{
				return 0x5;
			}
			else if ((a_Rotation >= 90) && (a_Rotation < 180))
			{
				return 0x2;
			}
			else
			{
				return 0x3;
			}
		}
	}

	static eBlockFace MetaDataToDirection(NIBBLETYPE a_MetaData)
	{
		switch (a_MetaData)
		{
			case 0x0: return BLOCK_FACE_YM;
			case 0x1: return BLOCK_FACE_YP;
			case 0x2: return BLOCK_FACE_ZM;
			case 0x3: return BLOCK_FACE_ZP;
			case 0x4: return BLOCK_FACE_XM;
			case 0x5: return BLOCK_FACE_XP;
			default:
			{
				ASSERT(!"Invalid Metadata");
				return BLOCK_FACE_NONE;
			}
		}
	}

	/** Converts piston block's metadata into a unit vector representing the direction in which the piston will extend. */
	static Vector3i MetadataToOffset(NIBBLETYPE a_PistonMeta);

	static void ExtendPiston(int a_BlockX, int a_BlockY, int a_BlockZ, cWorld * a_World);
	static void RetractPiston(int a_BlockX, int a_BlockY, int a_BlockZ, cWorld * a_World);

	virtual ColourID GetMapBaseColourID(NIBBLETYPE a_Meta) override
	{
		UNUSED(a_Meta);
		return 11;
	}

private:
	
	typedef std::unordered_set<Vector3i, VectorHasher<int>> Vector3iSet;

	/** Returns true if the piston (specified by blocktype) is a sticky piston */
	static inline bool IsSticky(BLOCKTYPE a_BlockType) { return (a_BlockType == E_BLOCK_STICKY_PISTON); }

	/** Returns true if the piston (with the specified meta) is extended */
	static inline bool IsExtended(NIBBLETYPE a_PistonMeta) { return ((a_PistonMeta & 0x8) != 0x0); }

	/** Returns true if the specified block can be pushed by a piston (and left intact) */
	static inline bool CanPush(BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta)
	{
		switch (a_BlockType)
		{
			case E_BLOCK_ANVIL:
			case E_BLOCK_BARRIER:
			case E_BLOCK_BEACON:
			case E_BLOCK_BEDROCK:
			case E_BLOCK_BREWING_STAND:
			case E_BLOCK_CHEST:
			case E_BLOCK_COMMAND_BLOCK:
			case E_BLOCK_DAYLIGHT_SENSOR:
			case E_BLOCK_DISPENSER:
			case E_BLOCK_DROPPER:
			case E_BLOCK_ENCHANTMENT_TABLE:
			case E_BLOCK_END_PORTAL:
			case E_BLOCK_END_PORTAL_FRAME:
			// Notice the lack of an E_BLOCK_ENDER_CHEST here; its because ender chests can totally be pushed / pulled in MCS :)
			case E_BLOCK_FURNACE:
			case E_BLOCK_LIT_FURNACE:
			case E_BLOCK_INVERTED_DAYLIGHT_SENSOR:
			case E_BLOCK_HOPPER:
			case E_BLOCK_JUKEBOX:
			case E_BLOCK_MOB_SPAWNER:
			case E_BLOCK_NETHER_PORTAL:
			case E_BLOCK_NOTE_BLOCK:
			case E_BLOCK_OBSIDIAN:
			case E_BLOCK_PISTON_EXTENSION:
			case E_BLOCK_STANDING_BANNER:
			case E_BLOCK_TRAPPED_CHEST:
			case E_BLOCK_WALL_BANNER:
			{
				return false;
			}
			case E_BLOCK_STICKY_PISTON:
			case E_BLOCK_PISTON:
			{
				// A piston can only be pushed if retracted:
				return !IsExtended(a_BlockMeta);
			}
		}
		return true;
	}

	/** Tries to push a block and increases the pushed blocks variable. Returns true if the block is pushable */
	static bool CanPushBlock(
		int a_BlockX, int a_BlockY, int a_BlockZ, cWorld * a_World, bool a_RequirePushable,
		Vector3iSet & a_BlocksPushed, const Vector3i & a_PushDir
	);
	
	/** Moves a list of blocks in a specific direction */
	static void PushBlocks(const Vector3iSet & a_BlocksToPush,
		cWorld * a_World, const Vector3i & a_PushDir
	);
} ;





class cBlockPistonHeadHandler :
	public cBlockHandler
{
	typedef cBlockHandler super;
	
public:
	cBlockPistonHeadHandler(void);
	
	virtual void OnDestroyedByPlayer(cChunkInterface & a_ChunkInterface, cWorldInterface & a_WorldInterface, cPlayer * a_Player, int a_BlockX, int a_BlockY, int a_BlockZ) override;

	virtual void ConvertToPickups(cItems & a_Pickups, NIBBLETYPE a_BlockMeta) override
	{
		// No pickups
		// Also with 1.7, the item forms of these technical blocks have been removed, so giving someone this will crash their client...
	}
} ;