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
|
#pragma once
#include "BlockHandler.h"
class cBlockVineHandler :
public cBlockHandler
{
public:
cBlockVineHandler(BLOCKTYPE a_BlockType)
: cBlockHandler(a_BlockType)
{
}
virtual bool GetPlacementBlockTypeMeta(
cChunkInterface & a_ChunkInterface, cPlayer * a_Player,
int a_BlockX, int a_BlockY, int a_BlockZ, char a_BlockFace,
int a_CursorX, int a_CursorY, int a_CursorZ,
BLOCKTYPE & a_BlockType, NIBBLETYPE & a_BlockMeta
) override
{
// TODO: Disallow placement where the vine doesn't attach to something properly
BLOCKTYPE BlockType = 0;
NIBBLETYPE BlockMeta;
a_ChunkInterface.GetBlockTypeMeta(a_BlockX, a_BlockY, a_BlockZ, BlockType, BlockMeta);
if (BlockType == m_BlockType)
{
a_BlockMeta = BlockMeta | DirectionToMetaData(a_BlockFace);
}
else
{
a_BlockMeta = DirectionToMetaData(a_BlockFace);
}
a_BlockType = m_BlockType;
return true;
}
static NIBBLETYPE DirectionToMetaData(char a_BlockFace)
{
switch (a_BlockFace)
{
case BLOCK_FACE_NORTH: return 0x1;
case BLOCK_FACE_SOUTH: return 0x4;
case BLOCK_FACE_WEST: return 0x8;
case BLOCK_FACE_EAST: return 0x2;
default: return 0x0;
}
}
static char MetaDataToDirection(NIBBLETYPE a_MetaData)
{
switch(a_MetaData)
{
case 0x1: return BLOCK_FACE_NORTH;
case 0x4: return BLOCK_FACE_SOUTH;
case 0x8: return BLOCK_FACE_WEST;
case 0x2: return BLOCK_FACE_EAST;
default: return BLOCK_FACE_TOP;
}
}
/// Returns true if the specified block type is good for vines to attach to
static bool IsBlockAttachable(BLOCKTYPE a_BlockType)
{
return (a_BlockType == E_BLOCK_LEAVES) || g_BlockIsSolid[a_BlockType];
}
/// Returns the meta that has the maximum allowable sides of the vine, given the surroundings
NIBBLETYPE GetMaxMeta(cChunk & a_Chunk, int a_RelX, int a_RelY, int a_RelZ)
{
static const struct
{
int x, z;
int Bit;
} Coords[] =
{
{ 0, 1, 1}, // south, ZP
{-1, 0, 2}, // west, XM
{ 0, -1, 4}, // north, ZM
{ 1, 0, 8}, // east, XP
} ;
int res = 0;
for (size_t i = 0; i < ARRAYCOUNT(Coords); i++)
{
BLOCKTYPE BlockType;
NIBBLETYPE BlockMeta;
if (
a_Chunk.UnboundedRelGetBlock(a_RelX + Coords[i].x, a_RelY, a_RelZ + Coords[i].z, BlockType, BlockMeta) &&
IsBlockAttachable(BlockType)
)
{
res |= Coords[i].Bit;
}
}
return res;
}
void Check(cChunkInterface & a_ChunkInterface, int a_RelX, int a_RelY, int a_RelZ, cChunk & a_Chunk) override
{
NIBBLETYPE CurMeta = a_Chunk.GetMeta(a_RelX, a_RelY, a_RelZ);
NIBBLETYPE MaxMeta = GetMaxMeta(a_Chunk, a_RelX, a_RelY, a_RelZ);
// Check if vine above us, add its meta to MaxMeta
if ((a_RelY < cChunkDef::Height - 1) && (a_Chunk.GetBlock(a_RelX, a_RelY + 1, a_RelZ) == m_BlockType))
{
MaxMeta |= a_Chunk.GetMeta(a_RelX, a_RelY + 1, a_RelZ);
}
NIBBLETYPE Common = CurMeta & MaxMeta; // Neighbors that we have and are legal
if (Common != CurMeta)
{
// There is a neighbor missing, need to update the meta or even destroy the block
bool HasTop = (a_RelY < cChunkDef::Height - 1) && IsBlockAttachable(a_Chunk.GetBlock(a_RelX, a_RelY + 1, a_RelZ));
if ((Common == 0) && !HasTop)
{
// The vine just lost all its support, destroy the block:
if (DoesDropOnUnsuitable())
{
int BlockX = a_RelX + a_Chunk.GetPosX() * cChunkDef::Width;
int BlockZ = a_RelZ + a_Chunk.GetPosZ() * cChunkDef::Width;
DropBlock(a_Chunk.GetWorld(), NULL, BlockX, a_RelY, BlockZ);
}
a_Chunk.SetBlock(a_RelX, a_RelY, a_RelZ, E_BLOCK_AIR, 0);
return;
}
a_Chunk.SetBlock(a_RelX, a_RelY, a_RelZ, m_BlockType, Common);
}
else
{
// Wake up the simulators for this block:
int BlockX = a_RelX + a_Chunk.GetPosX() * cChunkDef::Width;
int BlockZ = a_RelZ + a_Chunk.GetPosZ() * cChunkDef::Width;
a_Chunk.GetWorld()->GetSimulatorManager()->WakeUp(BlockX, a_RelY, BlockZ, &a_Chunk);
}
}
virtual bool DoesIgnoreBuildCollision(void) override
{
return true;
}
virtual const char * GetStepSound(void) override
{
return "step.grass";
}
virtual bool DoesDropOnUnsuitable(void) override
{
return false;
}
virtual void OnUpdate(cWorld * a_World, int X, int Y, int Z)
{
if (a_World->GetBlock(X, Y - 1, Z) == E_BLOCK_AIR)
{
a_World->SetBlock(X, Y - 1, Z, E_BLOCK_VINES, a_World->GetBlockMeta(X, Y, Z));
}
}
virtual NIBBLETYPE MetaRotateCCW(NIBBLETYPE a_Meta) override
{
return ((a_Meta >> 1) | (a_Meta << 3)) & 0x0f; // Rotate bits to the right
}
virtual NIBBLETYPE MetaRotateCW(NIBBLETYPE a_Meta) override
{
return ((a_Meta << 1) | (a_Meta >> 3)) & 0x0f; // Rotate bits to the left
}
virtual NIBBLETYPE MetaMirrorXY(NIBBLETYPE a_Meta) override
{
// Bits 2 and 4 stay, bits 1 and 3 swap
return ((a_Meta & 0x0a) | ((a_Meta & 0x01) << 2) | ((a_Meta & 0x04) >> 2));
}
virtual NIBBLETYPE MetaMirrorYZ(NIBBLETYPE a_Meta) override
{
// Bits 1 and 3 stay, bits 2 and 4 swap
return ((a_Meta & 0x05) | ((a_Meta & 0x02) << 2) | ((a_Meta & 0x08) >> 2));
}
} ;
|
