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Viscous fluids

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This commit is contained in:
Giuseppe Bilotta 2011-08-16 19:56:57 +02:00
parent 56e9f97294
commit 1eb14c7743
3 changed files with 41 additions and 6 deletions
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35
src/map.cpp
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@ -1562,6 +1562,9 @@ void Map::transformLiquids(core::map<v3s16, MapBlock*> & modified_blocks)
/*if(initial_size != 0)
dstream<<"transformLiquids(): initial_size="<<initial_size<<std::endl;*/
// list of nodes that due to viscosity have not reached their max level height
UniqueQueue<v3s16> must_reflow;
while(m_transforming_liquid.size() != 0)
{
// This should be done here so that it is done when continue is used
@ -1672,6 +1675,7 @@ void Map::transformLiquids(core::map<v3s16, MapBlock*> & modified_blocks)
*/
content_t new_node_content;
s8 new_node_level = -1;
s8 max_node_level = -1;
if (num_sources >= 2 || liquid_type == LIQUID_SOURCE) {
// liquid_kind will be set to either the flowing alternative of the node (if it's a liquid)
// or the flowing alternative of the first of the surrounding sources (if it's air), so
@ -1680,34 +1684,51 @@ void Map::transformLiquids(core::map<v3s16, MapBlock*> & modified_blocks)
} else if (num_sources == 1 && sources[0].t != NEIGHBOR_LOWER) {
// liquid_kind is set properly, see above
new_node_content = liquid_kind;
new_node_level = LIQUID_LEVEL_MAX;
max_node_level = new_node_level = LIQUID_LEVEL_MAX;
} else {
// no surrounding sources, so get the maximum level that can flow into this node
for (u16 i = 0; i < num_flows; i++) {
u8 nb_liquid_level = (flows[i].n.param2 & LIQUID_LEVEL_MASK);
switch (flows[i].t) {
case NEIGHBOR_UPPER:
if (nb_liquid_level + WATER_DROP_BOOST > new_node_level) {
new_node_level = LIQUID_LEVEL_MAX;
if (nb_liquid_level + WATER_DROP_BOOST > max_node_level) {
max_node_level = LIQUID_LEVEL_MAX;
if (nb_liquid_level + WATER_DROP_BOOST < LIQUID_LEVEL_MAX)
new_node_level = nb_liquid_level + WATER_DROP_BOOST;
max_node_level = nb_liquid_level + WATER_DROP_BOOST;
}
break;
case NEIGHBOR_LOWER:
break;
case NEIGHBOR_SAME_LEVEL:
if ((flows[i].n.param2 & LIQUID_FLOW_DOWN_MASK) != LIQUID_FLOW_DOWN_MASK &&
nb_liquid_level > 0 && nb_liquid_level - 1 > new_node_level) {
new_node_level = nb_liquid_level - 1;
nb_liquid_level > 0 && nb_liquid_level - 1 > max_node_level) {
max_node_level = nb_liquid_level - 1;
}
break;
}
}
if (max_node_level != liquid_level) {
// amount to gain, limited by viscosity
// must be at least 1 in absolute value
s8 level_inc = max_node_level - liquid_level;
u8 viscosity = content_features(liquid_kind).liquid_viscosity;
if (level_inc < -viscosity || level_inc > viscosity)
new_node_level = liquid_level + level_inc/viscosity;
else if (level_inc < 0)
new_node_level = liquid_level - 1;
else if (level_inc > 0)
new_node_level = liquid_level + 1;
if (new_node_level != max_node_level)
must_reflow.push_back(p0);
} else
new_node_level = max_node_level;
if (new_node_level >= 0)
new_node_content = liquid_kind;
else
new_node_content = CONTENT_AIR;
}
/*
@ -1760,6 +1781,8 @@ void Map::transformLiquids(core::map<v3s16, MapBlock*> & modified_blocks)
}
}
//dstream<<"Map::transformLiquids(): loopcount="<<loopcount<<std::endl;
while (must_reflow.size() > 0)
m_transforming_liquid.push_back(must_reflow.pop_front());
}
NodeMetadata* Map::getNodeMetadata(v3s16 p)