summaryrefslogtreecommitdiffstats
path: root/src/Generating/DungeonRoomsFinisher.cpp
blob: 694dcc3cca69e2aaa3ac292de7d245efff932c12 (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

// DungeonRoomsFinisher.cpp

// Declares the cDungeonRoomsFinisher class representing the finisher that generates dungeon rooms

#include "Globals.h"
#include "DungeonRoomsFinisher.h"
#include "../FastRandom.h"





/** Height, in blocks, of the internal dungeon room open space. This many air blocks Y-wise. */
static const int ROOM_HEIGHT = 4;





////////////////////////////////////////////////////////////////////////////////
// cDungeonRoom:

class cDungeonRoom :
	public cGridStructGen::cStructure
{
	typedef cGridStructGen::cStructure super;

public:

	cDungeonRoom(
		int a_GridX, int a_GridZ,
		int a_OriginX, int a_OriginZ,
		int a_HalfSizeX, int a_HalfSizeZ,
		int a_FloorHeight,
		cNoise & a_Noise
	) :
		super(a_GridX, a_GridZ, a_OriginX, a_OriginZ),
		m_StartX(a_OriginX - a_HalfSizeX),
		m_EndX(a_OriginX + a_HalfSizeX),
		m_StartZ(a_OriginZ - a_HalfSizeZ),
		m_EndZ(a_OriginZ + a_HalfSizeZ),
		m_FloorHeight(a_FloorHeight)
	{
		/*
		Pick coords next to the wall for the chests.
		This is done by indexing the possible coords, picking any one for the first chest
		and then picking another position for the second chest that is not adjacent to the first pos
		*/
		int rnd = a_Noise.IntNoise2DInt(a_OriginX, a_OriginZ) / 7;
		int SizeX = m_EndX - m_StartX - 1;
		int SizeZ = m_EndZ - m_StartZ - 1;
		int NumPositions = 2 * SizeX + 2 * SizeZ;
		int FirstChestPos = rnd % NumPositions;  // The corner positions are a bit more likely, but we don't mind
		rnd = rnd / 512;
		int SecondChestPos = (FirstChestPos + 2 + (rnd % (NumPositions - 3))) % NumPositions;
		m_Chest1 = DecodeChestCoords(FirstChestPos,  SizeX, SizeZ);
		m_Chest2 = DecodeChestCoords(SecondChestPos, SizeX, SizeZ);
	}

protected:

	// The X range of the room, start inclusive, end exclusive:
	int m_StartX, m_EndX;

	// The Z range of the room, start inclusive, end exclusive:
	int m_StartZ, m_EndZ;

	/** The Y coord of the floor of the room */
	int m_FloorHeight;

	/** The (absolute) coords of the first chest. The Y coord represents the chest's Meta value (facing). */
	Vector3i m_Chest1;

	/** The (absolute) coords of the second chest. The Y coord represents the chest's Meta value (facing). */
	Vector3i m_Chest2;



	/** Decodes the position index along the room walls into a proper 2D position for a chest. */
	Vector3i DecodeChestCoords(int a_PosIdx, int a_SizeX, int a_SizeZ)
	{
		if (a_PosIdx < a_SizeX)
		{
			// Return a coord on the ZM side of the room:
			return Vector3i(m_StartX + a_PosIdx + 1, E_META_CHEST_FACING_ZP, m_StartZ + 1);
		}
		a_PosIdx -= a_SizeX;
		if (a_PosIdx < a_SizeZ)
		{
			// Return a coord on the XP side of the room:
			return Vector3i(m_EndX - 1, E_META_CHEST_FACING_XM, m_StartZ + a_PosIdx + 1);
		}
		a_PosIdx -= a_SizeZ;
		if (a_PosIdx < a_SizeX)
		{
			// Return a coord on the ZP side of the room:
			return Vector3i(m_StartX + a_PosIdx + 1, E_META_CHEST_FACING_ZM, m_StartZ + 1);
		}
		a_PosIdx -= a_SizeX;
		// Return a coord on the XM side of the room:
		return Vector3i(m_StartX + 1, E_META_CHEST_FACING_XP, m_StartZ + a_PosIdx + 1);
	}



	/** Fills the specified area of blocks in the chunk with the specified blocktype if they are one of the overwritten block types.
	The coords are absolute, start coords are inclusive, end coords are exclusive. */
	void ReplaceCuboid(cChunkDesc & a_ChunkDesc, int a_StartX, int a_StartY, int a_StartZ, int a_EndX, int a_EndY, int a_EndZ, BLOCKTYPE a_DstBlockType)
	{
		int BlockX = a_ChunkDesc.GetChunkX() * cChunkDef::Width;
		int BlockZ = a_ChunkDesc.GetChunkZ() * cChunkDef::Width;
		int RelStartX = Clamp(a_StartX - BlockX, 0, cChunkDef::Width - 1);
		int RelStartZ = Clamp(a_StartZ - BlockZ, 0, cChunkDef::Width - 1);
		int RelEndX   = Clamp(a_EndX - BlockX,   0, cChunkDef::Width);
		int RelEndZ   = Clamp(a_EndZ - BlockZ,   0, cChunkDef::Width);
		for (int y = a_StartY; y < a_EndY; y++)
		{
			for (int z = RelStartZ; z < RelEndZ; z++)
			{
				for (int x = RelStartX; x < RelEndX; x++)
				{
					if (cBlockInfo::CanBeTerraformed(a_ChunkDesc.GetBlockType(x, y, z)))
					{
						a_ChunkDesc.SetBlockType(x, y, z, a_DstBlockType);
					}
				}  // for x
			}  // for z
		}  // for z
	}



	/** Fills the specified area of blocks in the chunk with a random pattern of the specified blocktypes, if they are one of the overwritten block types.
	The coords are absolute, start coords are inclusive, end coords are exclusive. The first blocktype uses 75% chance, the second 25% chance. */
	void ReplaceCuboidRandom(cChunkDesc & a_ChunkDesc, int a_StartX, int a_StartY, int a_StartZ, int a_EndX, int a_EndY, int a_EndZ, BLOCKTYPE a_DstBlockType1, BLOCKTYPE a_DstBlockType2)
	{
		int BlockX = a_ChunkDesc.GetChunkX() * cChunkDef::Width;
		int BlockZ = a_ChunkDesc.GetChunkZ() * cChunkDef::Width;
		int RelStartX = Clamp(a_StartX - BlockX, 0, cChunkDef::Width - 1);
		int RelStartZ = Clamp(a_StartZ - BlockZ, 0, cChunkDef::Width - 1);
		int RelEndX   = Clamp(a_EndX - BlockX,   0, cChunkDef::Width);
		int RelEndZ   = Clamp(a_EndZ - BlockZ,   0, cChunkDef::Width);
		cFastRandom rnd;
		for (int y = a_StartY; y < a_EndY; y++)
		{
			for (int z = RelStartZ; z < RelEndZ; z++)
			{
				for (int x = RelStartX; x < RelEndX; x++)
				{
					if (cBlockInfo::CanBeTerraformed(a_ChunkDesc.GetBlockType(x, y, z)))
					{
						BLOCKTYPE BlockType = (rnd.NextInt(101) < 75) ? a_DstBlockType1 : a_DstBlockType2;
						a_ChunkDesc.SetBlockType(x, y, z, BlockType);
					}
				}  // for x
			}  // for z
		}  // for z
	}



	/** Tries to place a chest at the specified (absolute) coords.
	Does nothing if the coords are outside the chunk. */
	void TryPlaceChest(cChunkDesc & a_ChunkDesc, const Vector3i & a_Chest)
	{
		int RelX = a_Chest.x - a_ChunkDesc.GetChunkX() * cChunkDef::Width;
		int RelZ = a_Chest.z - a_ChunkDesc.GetChunkZ() * cChunkDef::Width;
		if (
			(RelX < 0) || (RelX >= cChunkDef::Width) ||  // The X coord is not in this chunk
			(RelZ < 0) || (RelZ >= cChunkDef::Width)     // The Z coord is not in this chunk
		)
		{
			return;
		}
		a_ChunkDesc.SetBlockTypeMeta(RelX, m_FloorHeight + 1, RelZ, E_BLOCK_CHEST, (NIBBLETYPE)a_Chest.y);

		// TODO: Fill the chest with random loot
	}



	// cGridStructGen::cStructure override:
	virtual void DrawIntoChunk(cChunkDesc & a_ChunkDesc) override
	{
		if (
			(m_EndX <= a_ChunkDesc.GetChunkX() * cChunkDef::Width) ||
			(m_StartX >= a_ChunkDesc.GetChunkX() * cChunkDef::Width + cChunkDef::Width) ||
			(m_EndZ <= a_ChunkDesc.GetChunkZ() * cChunkDef::Width) ||
			(m_StartZ >= a_ChunkDesc.GetChunkZ() * cChunkDef::Width + cChunkDef::Width)
		)
		{
			// The chunk is not intersecting the room at all, bail out
			return;
		}
		int b = m_FloorHeight + 1;  // Bottom
		int t = m_FloorHeight + 1 + ROOM_HEIGHT;  // Top
		ReplaceCuboidRandom(a_ChunkDesc, m_StartX, m_FloorHeight, m_StartZ, m_EndX + 1, b, m_EndZ + 1, E_BLOCK_MOSSY_COBBLESTONE, E_BLOCK_COBBLESTONE);  // Floor
		ReplaceCuboid(a_ChunkDesc, m_StartX + 1, b, m_StartZ + 1, m_EndX, t, m_EndZ, E_BLOCK_AIR);  // Insides

		// Walls:
		ReplaceCuboid(a_ChunkDesc, m_StartX, b, m_StartZ, m_StartX + 1, t, m_EndZ,       E_BLOCK_COBBLESTONE);  // XM wall
		ReplaceCuboid(a_ChunkDesc, m_EndX,   b, m_StartZ, m_EndX + 1,   t, m_EndZ,       E_BLOCK_COBBLESTONE);  // XP wall
		ReplaceCuboid(a_ChunkDesc, m_StartX, b, m_StartZ, m_EndX + 1,   t, m_StartZ + 1, E_BLOCK_COBBLESTONE);  // ZM wall
		ReplaceCuboid(a_ChunkDesc, m_StartX, b, m_EndZ,   m_EndX + 1,   t, m_EndZ + 1,   E_BLOCK_COBBLESTONE);  // ZP wall

		// Place chests:
		TryPlaceChest(a_ChunkDesc, m_Chest1);
		TryPlaceChest(a_ChunkDesc, m_Chest2);

		// Place the spawner:
		int CenterX = (m_StartX + m_EndX) / 2 - a_ChunkDesc.GetChunkX() * cChunkDef::Width;
		int CenterZ = (m_StartZ + m_EndZ) / 2 - a_ChunkDesc.GetChunkZ() * cChunkDef::Width;
		if (
			(CenterX >= 0) && (CenterX < cChunkDef::Width) &&
			(CenterZ >= 0) && (CenterZ < cChunkDef::Width)
		)
		{
			a_ChunkDesc.SetBlockTypeMeta(CenterX, b, CenterZ, E_BLOCK_MOB_SPAWNER, 0);
			// TODO: Set the spawned mob
		}
	}
} ;






////////////////////////////////////////////////////////////////////////////////
// cDungeonRoomsFinisher:

cDungeonRoomsFinisher::cDungeonRoomsFinisher(cTerrainHeightGen & a_HeightGen, int a_Seed, int a_GridSize, int a_MaxSize, int a_MinSize, const AString & a_HeightDistrib) :
	super(a_Seed + 100, a_GridSize, a_GridSize, a_GridSize, a_GridSize, a_MaxSize, a_MaxSize, 1024),
	m_HeightGen(a_HeightGen),
	m_MaxHalfSize((a_MaxSize + 1) / 2),
	m_MinHalfSize((a_MinSize + 1) / 2),
	m_HeightProbability(cChunkDef::Height)
{
	// Initialize the height probability distribution:
	m_HeightProbability.SetDefString(a_HeightDistrib);

	// Normalize the min and max size:
	if (m_MinHalfSize > m_MaxHalfSize)
	{
		std::swap(m_MinHalfSize, m_MaxHalfSize);
	}
}






cDungeonRoomsFinisher::cStructurePtr cDungeonRoomsFinisher::CreateStructure(int a_GridX, int a_GridZ, int a_OriginX, int a_OriginZ)
{
	// Select a random room size in each direction:
	int rnd = m_Noise.IntNoise2DInt(a_OriginX, a_OriginZ) / 7;
	int HalfSizeX = m_MinHalfSize + (rnd % (m_MaxHalfSize - m_MinHalfSize + 1));
	rnd = rnd / 32;
	int HalfSizeZ = m_MinHalfSize + (rnd % (m_MaxHalfSize - m_MinHalfSize + 1));
	rnd = rnd / 32;

	// Select a random floor height for the room, based on the height generator:
	int ChunkX, ChunkZ;
	int RelX = a_OriginX, RelY = 0, RelZ = a_OriginZ;
	cChunkDef::AbsoluteToRelative(RelX, RelY, RelZ, ChunkX, ChunkZ);
	cChunkDef::HeightMap HeightMap;
	m_HeightGen.GenHeightMap(ChunkX, ChunkZ, HeightMap);
	int Height = cChunkDef::GetHeight(HeightMap, RelX, RelZ);  // Max room height at {a_OriginX, a_OriginZ}
	Height = Clamp(m_HeightProbability.MapValue(rnd % m_HeightProbability.GetSum()), 10, Height - 5);

	// Create the dungeon room descriptor:
	return cStructurePtr(new cDungeonRoom(a_GridX, a_GridZ, a_OriginX, a_OriginZ, HalfSizeX, HalfSizeZ, Height, m_Noise));
}