summaryrefslogtreecommitdiffstats
path: root/src/Blocks/BlockSapling.h
blob: 3703538824a16b1dd9da66d54a126eb402f1cc91 (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

#pragma once

#include "BlockHandler.h"
#include "../FastRandom.h"





class cBlockSaplingHandler :
	public cBlockHandler
{
	using Super = cBlockHandler;

public:

	cBlockSaplingHandler(BLOCKTYPE a_BlockType):
		Super(a_BlockType)
	{
	}





	virtual cItems ConvertToPickups(NIBBLETYPE a_BlockMeta, cBlockEntity * a_BlockEntity, const cEntity * a_Digger, const cItem * a_Tool) override
	{
		// The low 3 bits store the sapling type; bit 0x08 is the growth timer (not used in pickups)
		return cItem(m_BlockType, 1, a_BlockMeta & 0x07);
	}





	virtual bool CanBeAt(cChunkInterface & a_ChunkInterface, int a_RelX, int a_RelY, int a_RelZ, const cChunk & a_Chunk) override
	{
		return (a_RelY > 0) && IsBlockTypeOfDirt(a_Chunk.GetBlock(a_RelX, a_RelY - 1, a_RelZ));
	}





	virtual void OnUpdate(
		cChunkInterface & a_ChunkInterface,
		cWorldInterface & a_WorldInterface,
		cBlockPluginInterface & a_PluginInterface,
		cChunk & a_Chunk,
		const Vector3i a_RelPos
	) override
	{
		auto Meta = a_Chunk.GetMeta(a_RelPos);
		auto Light = std::max(a_Chunk.GetBlockLight(a_RelPos), a_Chunk.GetTimeAlteredLight(a_Chunk.GetSkyLight(a_RelPos)));

		// Only grow if we have the right amount of light
		if (Light > 8)
		{
			auto & random = GetRandomProvider();
			// Only grow if we are in the right growth stage and have the right amount of space around them.
			if (((Meta & 0x08) != 0) && random.RandBool(0.45) && CanGrowAt(a_Chunk, a_RelPos.x, a_RelPos.y, a_RelPos.z, Meta))
			{
				auto WorldPos = a_Chunk.RelativeToAbsolute(a_RelPos);
				a_Chunk.GetWorld()->GrowTree(WorldPos.x, WorldPos.y, WorldPos.z);
			}
			// Only move to the next growth stage if we haven't gone there yet
			else if (((Meta & 0x08) == 0) && random.RandBool(0.45))
			{
				a_Chunk.SetMeta(a_RelPos, Meta | 0x08);
			}
		}
	}





	bool CanGrowAt(cChunk & a_Chunk, int a_RelX, int a_RelY, int a_RelZ, NIBBLETYPE a_Meta)
	{
		a_Meta = a_Meta & 0x07;
		int CheckHeight = 0;
		bool LargeTree = false;

		// Get the height to check against
		switch (a_Meta)
		{
			case E_META_SAPLING_APPLE:
			{
				CheckHeight = 5;
				break;
			}
			case E_META_SAPLING_CONIFER:
			{
				CheckHeight = 7;
				if (IsLargeTree(a_Chunk, a_RelX, a_RelY, a_RelZ, a_Meta))
				{
					CheckHeight = 16;
					LargeTree = true;
				}
				break;
			}
			case E_META_SAPLING_BIRCH:
			{
				CheckHeight = 6;
				break;
			}
			case E_META_SAPLING_JUNGLE:
			{
				CheckHeight = 7;
				if (IsLargeTree(a_Chunk, a_RelX, a_RelY, a_RelZ, a_Meta))
				{
					CheckHeight = 13;
					LargeTree = true;
				}
				break;
			}
			// Acacias don't need horizontal clearance
			case E_META_SAPLING_ACACIA:
			{
				if (!IsLargeTree(a_Chunk, a_RelX, a_RelY, a_RelZ, a_Meta))
				{
					return false;
				}
				CheckHeight = 7;
				LargeTree = true;
				break;
			}
			// Dark Oaks don't need horizontal clearance
			case E_META_SAPLING_DARK_OAK:
			{
				if (!IsLargeTree(a_Chunk, a_RelX, a_RelY, a_RelZ, a_Meta))
				{
					return false;
				}
				CheckHeight = 7;
				LargeTree = true;
				break;
			}
		}
		// We should always get a valid CheckHeight
		ASSERT(CheckHeight != 0);

		// Don't grow a tree if we don't have enough space left above it in the chunk
		if ((a_RelY + CheckHeight) > cChunkDef::Height)
		{
			return false;
		}
		bool CanGrow = true;

		// Validate the neighbor blocks. They cannot be solid.
		BLOCKTYPE check = E_BLOCK_AIR;
		a_Chunk.UnboundedRelGetBlockType(a_RelX - 1, a_RelY, a_RelZ, check);
		CanGrow = CanGrow && cBlockInfo::IsTransparent(check);

		a_Chunk.UnboundedRelGetBlockType(a_RelX + 1, a_RelY, a_RelZ, check);
		CanGrow = CanGrow && cBlockInfo::IsTransparent(check);

		a_Chunk.UnboundedRelGetBlockType(a_RelX, a_RelY, a_RelZ - 1, check);
		CanGrow = CanGrow && cBlockInfo::IsTransparent(check);

		a_Chunk.UnboundedRelGetBlockType(a_RelX, a_RelY, a_RelZ + 1, check);
		CanGrow = CanGrow && cBlockInfo::IsTransparent(check);

		while (CheckHeight && CanGrow)
		{
			check = a_Chunk.GetBlock(a_RelX, a_RelY + CheckHeight, a_RelZ);
			CanGrow = CanGrow && ((check == E_BLOCK_AIR) || (check == E_BLOCK_LEAVES));

			// We have to check above the neighboring saplings as well
			if (LargeTree)
			{
				a_Chunk.UnboundedRelGetBlockType(a_RelX + 1, a_RelY + CheckHeight, a_RelZ, check);
				CanGrow = CanGrow && ((check == E_BLOCK_AIR) || (check == E_BLOCK_LEAVES));

				a_Chunk.UnboundedRelGetBlockType(a_RelX, a_RelY + CheckHeight, a_RelZ + 1, check);
				CanGrow = CanGrow && ((check == E_BLOCK_AIR) || (check == E_BLOCK_LEAVES));

				a_Chunk.UnboundedRelGetBlockType(a_RelX + 1, a_RelY + CheckHeight, a_RelZ + 1, check);
				CanGrow = CanGrow && ((check == E_BLOCK_AIR) || (check == E_BLOCK_LEAVES));
			}

			--CheckHeight;
		}

		return CanGrow;
	}





	virtual int Grow(cChunk & a_Chunk, Vector3i a_RelPos, int a_NumStages = 1) override
	{
		auto blockMeta = a_Chunk.GetMeta(a_RelPos);
		auto typeMeta = blockMeta & 0x07;
		auto growState = blockMeta >> 3;
		int res = 0;

		// Try to increase the sapling's growState:
		if (growState < 1)
		{
			++growState;
			a_Chunk.FastSetBlock(a_RelPos, m_BlockType, static_cast<NIBBLETYPE>(growState << 3 | typeMeta));
			if (a_NumStages == 1)
			{
				// Only asked to grow one stage, which we did. Bail out.
				return 1;
			}
			res = 1;
		}

		// The sapling is grown, now it becomes a tree:
		a_Chunk.GetWorld()->GrowTreeFromSapling(a_Chunk.RelativeToAbsolute(a_RelPos), blockMeta);
		return res + 1;
	}





	virtual ColourID GetMapBaseColourID(NIBBLETYPE a_Meta) override
	{
		UNUSED(a_Meta);
		return 7;
	}





private:

	bool IsLargeTree(cChunk & a_Chunk, int a_RelX, int a_RelY, int a_RelZ, NIBBLETYPE a_Meta)
	{
		BLOCKTYPE type;
		NIBBLETYPE meta;
		bool LargeTree = true;
		a_Chunk.UnboundedRelGetBlock(a_RelX + 1, a_RelY, a_RelZ, type, meta);
		LargeTree = LargeTree && (type == E_BLOCK_SAPLING) && ((a_Meta & meta) == a_Meta);

		a_Chunk.UnboundedRelGetBlock(a_RelX + 1, a_RelY, a_RelZ + 1, type, meta);
		LargeTree = LargeTree && (type == E_BLOCK_SAPLING) && ((a_Meta & meta) == a_Meta);

		a_Chunk.UnboundedRelGetBlock(a_RelX, a_RelY, a_RelZ + 1, type, meta);
		LargeTree = LargeTree && (type == E_BLOCK_SAPLING) && ((a_Meta & meta) == a_Meta);

		return LargeTree;
	}
} ;