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
|
#include "cWaterSimulator.h"
#include "cWorld.h"
#include "Vector3i.h"
#include "BlockID.h"
#include <vector>
class cWaterSimulator::WaterData
{
public:
WaterData( cWorld* a_World )
: m_ActiveWater( new std::vector< Vector3i >() )
, m_Buffer( new std::vector< Vector3i >() )
, m_World( a_World )
{}
std::vector< Vector3i > GetLowestPoints( int a_X, int a_Y, int a_Z )
{
std::vector< Vector3i > Points;
if( m_World->GetBlock(a_X, a_Y-1, a_Z) == E_BLOCK_AIR )
{
Points.push_back( Vector3i( a_X, a_Y-1, a_Z ) );
return Points;
}
Vector3i LowerPoints [] = {
Vector3i( a_X-1, a_Y-1, a_Z ),
Vector3i( a_X+1, a_Y-1, a_Z ),
Vector3i( a_X, a_Y-1, a_Z-1 ),
Vector3i( a_X, a_Y-1, a_Z+1 ),
};
bool bWaterFound = false;
for( int i = 0; i < 4; ++i )
{
char Block1 = m_World->GetBlock( LowerPoints[i].x, LowerPoints[i].y, LowerPoints[i].z );
char Block2 = m_World->GetBlock( LowerPoints[i].x, a_Y, LowerPoints[i].z );
if( Block1 == E_BLOCK_AIR && Block2 == E_BLOCK_AIR )
{
Points.push_back( LowerPoints[i] );
LowerPoints[i].y = a_Y;
Points.push_back( LowerPoints[i] );
}
else if( (Block2 == E_BLOCK_WATER || Block2 == E_BLOCK_STATIONARY_WATER ) && ( Block1 == E_BLOCK_AIR || Block1 == E_BLOCK_WATER || Block1 == E_BLOCK_STATIONARY_WATER ) )
{
bWaterFound = true;
}
}
if( Points.size() == 0 && !bWaterFound )
{
Vector3i LevelPoints [] = {
Vector3i( a_X-1, a_Y, a_Z ),
Vector3i( a_X+1, a_Y, a_Z ),
Vector3i( a_X, a_Y, a_Z-1 ),
Vector3i( a_X, a_Y, a_Z+1 ),
};
for( int i = 0; i < 4; ++i )
{
char Block = m_World->GetBlock( LevelPoints[i].x, a_Y, LevelPoints[i].z );
if( Block == E_BLOCK_AIR || Block == E_BLOCK_WATER || Block == E_BLOCK_STATIONARY_WATER )
Points.push_back( LevelPoints[i] );
}
}
return Points;
}
std::vector< Vector3i >* m_ActiveWater;
std::vector< Vector3i >* m_Buffer;
cWorld* m_World;
};
cWaterSimulator::cWaterSimulator( cWorld* a_World )
: m_World( a_World )
, m_Data( new WaterData( a_World ) )
{
}
cWaterSimulator::~cWaterSimulator()
{
}
void cWaterSimulator::WakeUp( int a_X, int a_Y, int a_Z )
{
AddBlock( a_X, a_Y, a_Z );
AddBlock( a_X-1, a_Y, a_Z );
AddBlock( a_X+1, a_Y, a_Z );
AddBlock( a_X, a_Y-1, a_Z );
AddBlock( a_X, a_Y+1, a_Z );
AddBlock( a_X, a_Y, a_Z-1 );
AddBlock( a_X, a_Y, a_Z+1 );
}
void cWaterSimulator::AddBlock( int a_X, int a_Y, int a_Z )
{
// Check for duplicates
std::vector< Vector3i > & ActiveWater = *m_Data->m_ActiveWater;
for( std::vector< Vector3i >::iterator itr = ActiveWater.begin(); itr != ActiveWater.end(); ++itr )
{
Vector3i & pos = *itr;
if( pos.x == a_X && pos.y == a_Y && pos.z == a_Z )
return;
}
ActiveWater.push_back( Vector3i( a_X, a_Y, a_Z ) );
}
char cWaterSimulator::GetHighestLevelAround( int a_X, int a_Y, int a_Z )
{
char Max = 8;
#define __HIGHLEVEL_CHECK__( x, y, z ) \
if( IsWaterBlock( m_World->GetBlock( x, y, z ) ) ) \
{ \
char Meta; \
if( (Meta = m_World->GetBlockMeta( x, y, z ) ) < Max ) Max = Meta; \
else if( Meta == 8 ) Max = 0; \
if( Max == 0 ) return 0; \
}
__HIGHLEVEL_CHECK__( a_X-1, a_Y, a_Z );
__HIGHLEVEL_CHECK__( a_X+1, a_Y, a_Z );
__HIGHLEVEL_CHECK__( a_X, a_Y, a_Z-1 );
__HIGHLEVEL_CHECK__( a_X, a_Y, a_Z+1 );
return Max;
}
void cWaterSimulator::Simulate( float a_Dt )
{
m_Timer += a_Dt;
std::swap( m_Data->m_ActiveWater, m_Data->m_Buffer ); // Swap so blocks can be added to empty ActiveWater array
m_Data->m_ActiveWater->clear();
std::vector< Vector3i > & WaterBlocks = *m_Data->m_Buffer;
for( std::vector< Vector3i >::iterator itr = WaterBlocks.begin(); itr != WaterBlocks.end(); ++itr )
{
Vector3i & pos = *itr;
char BlockID = m_World->GetBlock( pos.x, pos.y, pos.z );
if( IsWaterBlock( BlockID ) ) // only care about water
{
bool bIsFed = false;
char Meta = m_World->GetBlockMeta( pos.x, pos.y, pos.z );
char Feed = Meta;
if( Meta == 8 ) // Falling water
{
if( IsWaterBlock( m_World->GetBlock(pos.x, pos.y+1, pos.z) ) ) // Block above is water
{
bIsFed = true;
Meta = 0; // Make it a full block
}
}
else if( Meta == 0 ) // It's a full block, so it's always fed
{
bIsFed = true;
}
else
{
if( (Feed = GetHighestLevelAround( pos.x, pos.y, pos.z )) < Meta )
bIsFed = true;
}
if( bIsFed )
{
char DownID = m_World->GetBlock( pos.x, pos.y-1, pos.z );
if( DownID == E_BLOCK_AIR || IsWaterBlock( DownID ) ) // free for water
{
m_World->FastSetBlock( pos.x, pos.y-1, pos.z, E_BLOCK_WATER, 8 ); // falling
AddBlock( pos.x, pos.y-1, pos.z );
}
else // Not falling water
{
if( Feed+1 < Meta )
{
m_World->FastSetBlock( pos.x, pos.y, pos.z, E_BLOCK_WATER, Feed+1 );
AddBlock( pos.x, pos.y, pos.z );
}
else if( Meta < 7 ) // 7 is only 1 unit high, so it cannot spread, lower than 7 can though.
{
std::vector< Vector3i > Points = m_Data->GetLowestPoints( pos.x, pos.y, pos.z );
for( std::vector< Vector3i >::iterator itr = Points.begin(); itr != Points.end(); ++itr )
{
Vector3i & p = *itr;
char BlockID = m_World->GetBlock( p.x, p.y, p.z );
if( !IsWaterBlock( BlockID ) )
{
if( p.y == pos.y )
m_World->FastSetBlock(p.x, p.y, p.z, E_BLOCK_WATER, Meta+1);
else
m_World->FastSetBlock(p.x, p.y, p.z, E_BLOCK_WATER, 8);
AddBlock( p.x, p.y, p.z );
}
else // it's water
{
char PointMeta = m_World->GetBlockMeta( p.x, p.y, p.z );
if( PointMeta > Meta+1 )
{
AddBlock( p.x, p.y, p.z );
}
}
}
}
}
}
else // not fed
{
m_World->FastSetBlock( pos.x, pos.y, pos.z, E_BLOCK_AIR, 0 );
WakeUp( pos.x, pos.y, pos.z );
}
}
}
}
bool cWaterSimulator::IsWaterBlock( char a_BlockID )
{
return a_BlockID == E_BLOCK_WATER || a_BlockID == E_BLOCK_STATIONARY_WATER;
}
|
