summaryrefslogtreecommitdiffstats
path: root/src/Blocks/BlockPiston.cpp
blob: 8e56fe06b3e4dd631893acc40bef704a657c4073 (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
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290

#include "Globals.h"
#include "BlockPiston.h"
#include "../Item.h"
#include "../World.h"
#include "../Entities/Player.h"
#include "BlockInServerPluginInterface.h"
#include "ChunkInterface.h"

#include <vector>





#define AddPistonDir(x, y, z, dir, amount) \
	switch (dir & 0x07) \
	{ \
		case 0: (y) -= (amount); break; \
		case 1: (y) += (amount); break; \
		case 2: (z) -= (amount); break; \
		case 3: (z) += (amount); break; \
		case 4: (x) -= (amount); break; \
		case 5: (x) += (amount); break; \
		default: \
		{ \
			LOGWARNING("%s: invalid direction %d, ignoring", __FUNCTION__, dir & 0x07); \
			break; \
		} \
	}

#define PISTON_MAX_PUSH_DISTANCE 12




cBlockPistonHandler::cBlockPistonHandler(BLOCKTYPE a_BlockType)
	: cBlockHandler(a_BlockType)
{
}





void cBlockPistonHandler::OnDestroyed(cChunkInterface & a_ChunkInterface, cWorldInterface & a_WorldInterface, int a_BlockX, int a_BlockY, int a_BlockZ)
{
	NIBBLETYPE OldMeta = a_ChunkInterface.GetBlockMeta(a_BlockX, a_BlockY, a_BlockZ);

	int newX = a_BlockX;
	int newY = a_BlockY;
	int newZ = a_BlockZ;
	AddPistonDir(newX, newY, newZ, OldMeta, 1);

	if (a_ChunkInterface.GetBlock(newX, newY, newZ) == E_BLOCK_PISTON_EXTENSION)
	{
		a_ChunkInterface.SetBlock(newX, newY, newZ, E_BLOCK_AIR, 0);
	}
}





void cBlockPistonHandler::ConvertToPickups(cItems & a_Pickups, NIBBLETYPE a_BlockMeta)
{
	// Returning Piston Item without Direction-Metavalue
	a_Pickups.push_back(cItem(m_BlockType, 1));
}





bool cBlockPistonHandler::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
)
{
	a_BlockType = m_BlockType;
	a_BlockMeta = RotationPitchToMetaData(a_Player->GetYaw(), a_Player->GetPitch());
	return true;
}





bool cBlockPistonHandler::CanPushBlock(
	int a_BlockX, int a_BlockY, int a_BlockZ, cWorld * a_World, bool a_RequirePushable,
	std::unordered_set<Vector3i, VectorHasher<int>> & a_BlocksPushed, NIBBLETYPE a_PistonMeta
)
{
	BLOCKTYPE currBlock;
	NIBBLETYPE currMeta;
	a_World->GetBlockTypeMeta(a_BlockX, a_BlockY, a_BlockZ, currBlock, currMeta);
	
	if (currBlock == E_BLOCK_AIR)
	{
		// Air can be pushed
		return true;
	}
	
	if (!CanPush(currBlock, currMeta))
	{
		return !a_RequirePushable;
	}

	if (a_BlocksPushed.size() >= PISTON_MAX_PUSH_DISTANCE)
	{
		return false;
	}
	
	if (!a_BlocksPushed.emplace(a_BlockX, a_BlockY, a_BlockZ).second || cBlockInfo::IsPistonBreakable(currBlock))
	{
		return true;  // Element exist already
	}
	
	AddPistonDir(a_BlockX, a_BlockY, a_BlockZ, a_PistonMeta, 1);
	return CanPushBlock(a_BlockX, a_BlockY, a_BlockZ, a_World, true, a_BlocksPushed, a_PistonMeta);
}





void cBlockPistonHandler::ExtendPiston(int a_BlockX, int a_BlockY, int a_BlockZ, cWorld * a_World)
{
	BLOCKTYPE pistonBlock;
	NIBBLETYPE pistonMeta;
	a_World->GetBlockTypeMeta(a_BlockX, a_BlockY, a_BlockZ, pistonBlock, pistonMeta);

	if (IsExtended(pistonMeta))
	{
		// Already extended, bail out
		return;
	}

	int moveX = a_BlockX;
	int moveY = a_BlockY;
	int moveZ = a_BlockZ;
	
	AddPistonDir(moveX, moveY, moveZ, pistonMeta, 1);
	std::unordered_set<Vector3i, VectorHasher<int>> blocksPushed;
	if (!CanPushBlock(moveX, moveY, moveZ, a_World, true, blocksPushed, pistonMeta))
	{
		// Can't push anything, bail out
		return;
	}
	
	Vector3i pistonMoveVec;
	AddPistonDir(pistonMoveVec.x, pistonMoveVec.y, pistonMoveVec.z, pistonMeta, 1);
	std::vector<Vector3i> sortedBlocks(blocksPushed.begin(), blocksPushed.end());
	std::sort(sortedBlocks.begin(), sortedBlocks.end(), [pistonMoveVec](const Vector3i & a, const Vector3i & b)
	{
		return a.Dot(pistonMoveVec) > b.Dot(pistonMoveVec);
	});

	a_World->BroadcastBlockAction(a_BlockX, a_BlockY, a_BlockZ, 0, pistonMeta, pistonBlock);
	a_World->BroadcastSoundEffect("tile.piston.out", static_cast<double>(a_BlockX), static_cast<double>(a_BlockY), static_cast<double>(a_BlockZ), 0.5f, 0.7f);

	BLOCKTYPE moveBlock;
	NIBBLETYPE moveMeta;
	for (const Vector3i & moveBlockVec : sortedBlocks)
	{
		moveX = moveBlockVec.x;
		moveY = moveBlockVec.y;
		moveZ = moveBlockVec.z;
		a_World->GetBlockTypeMeta(moveX, moveY, moveZ, moveBlock, moveMeta);
		a_World->SetBlock(moveX, moveY, moveZ, E_BLOCK_AIR, 0);
		
		AddPistonDir(moveX, moveY, moveZ, pistonMeta, 1);
		
		if (cBlockInfo::IsPistonBreakable(moveBlock))
		{
			cBlockHandler * Handler = BlockHandler(moveBlock);
			if (Handler->DoesDropOnUnsuitable())
			{
				cChunkInterface ChunkInterface(a_World->GetChunkMap());
				cBlockInServerPluginInterface PluginInterface(*a_World);
				Handler->DropBlock(ChunkInterface, *a_World, PluginInterface, nullptr, moveX, moveY, moveZ);
			}
		} else
		{
			a_World->SetBlock(moveX, moveY, moveZ, moveBlock, moveMeta);
		}
	}
	
	a_World->SetBlock(a_BlockX, a_BlockY, a_BlockZ, pistonBlock, pistonMeta | 0x8);
	AddPistonDir(a_BlockX, a_BlockY, a_BlockZ, pistonMeta, 1);
	a_World->SetBlock(a_BlockX, a_BlockY, a_BlockZ, E_BLOCK_PISTON_EXTENSION, pistonMeta | (IsSticky(pistonBlock) ? 8 : 0));
}





void cBlockPistonHandler::RetractPiston(int a_BlockX, int a_BlockY, int a_BlockZ, cWorld * a_World)
{
	BLOCKTYPE pistonBlock;
	NIBBLETYPE pistonMeta;
	a_World->GetBlockTypeMeta(a_BlockX, a_BlockY, a_BlockZ, pistonBlock, pistonMeta);

	if (!IsExtended(pistonMeta))
	{
		// Already retracted, bail out
		return;
	}

	// Check the extension:
	AddPistonDir(a_BlockX, a_BlockY, a_BlockZ, pistonMeta, 1);
	if (a_World->GetBlock(a_BlockX, a_BlockY, a_BlockZ) != E_BLOCK_PISTON_EXTENSION)
	{
		LOGD("%s: Piston without an extension - still extending, or just in an invalid state?", __FUNCTION__);
		return;
	}

	AddPistonDir(a_BlockX, a_BlockY, a_BlockZ, pistonMeta, -1);
	a_World->SetBlock(a_BlockX, a_BlockY, a_BlockZ, pistonBlock, pistonMeta & ~(8));
	a_World->BroadcastBlockAction(a_BlockX, a_BlockY, a_BlockZ, 1, pistonMeta & ~(8), pistonBlock);
	a_World->BroadcastSoundEffect("tile.piston.in", static_cast<double>(a_BlockX), static_cast<double>(a_BlockY), static_cast<double>(a_BlockZ), 0.5f, 0.7f);
	AddPistonDir(a_BlockX, a_BlockY, a_BlockZ, pistonMeta, 1);

	// Retract the extension, pull block if appropriate
	if (IsSticky(pistonBlock))
	{
		int tempx = a_BlockX, tempy = a_BlockY, tempz = a_BlockZ;
		AddPistonDir(tempx, tempy, tempz, pistonMeta, 1);
		BLOCKTYPE tempBlock;
		NIBBLETYPE tempMeta;
		a_World->GetBlockTypeMeta(tempx, tempy, tempz, tempBlock, tempMeta);
		if (CanPull(tempBlock, tempMeta))
		{
			// Pull the block
			a_World->SetBlock(a_BlockX, a_BlockY, a_BlockZ, tempBlock, tempMeta);
			a_World->SetBlock(tempx, tempy, tempz, E_BLOCK_AIR, 0);
			return;
		}
	}
	
	// Retract without pulling
	a_World->SetBlock(a_BlockX, a_BlockY, a_BlockZ, E_BLOCK_AIR, 0);
}





////////////////////////////////////////////////////////////////////////////////
// cBlockPistonHeadHandler:

cBlockPistonHeadHandler::cBlockPistonHeadHandler(void) :
	super(E_BLOCK_PISTON_EXTENSION)
{
}





void cBlockPistonHeadHandler::OnDestroyedByPlayer(cChunkInterface & a_ChunkInterface, cWorldInterface & a_WorldInterface, cPlayer * a_Player, int a_BlockX, int a_BlockY, int a_BlockZ)
{
	NIBBLETYPE OldMeta = a_ChunkInterface.GetBlockMeta(a_BlockX, a_BlockY, a_BlockZ);

	int newX = a_BlockX;
	int newY = a_BlockY;
	int newZ = a_BlockZ;
	AddPistonDir(newX, newY, newZ, OldMeta, -1);

	BLOCKTYPE Block = a_ChunkInterface.GetBlock(newX, newY, newZ);
	if ((Block == E_BLOCK_STICKY_PISTON) || (Block == E_BLOCK_PISTON))
	{
		a_ChunkInterface.DigBlock(a_WorldInterface, newX, newY, newZ);
		if (a_Player->IsGameModeCreative())
		{
			return;  // No pickups if creative
		}

		cItems Pickups;
		Pickups.push_back(cItem(Block, 1));
		a_WorldInterface.SpawnItemPickups(Pickups, a_BlockX + 0.5, a_BlockY + 0.5, a_BlockZ + 0.5);
	}
}