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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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7
src/content_mapnode.cpp
View File

@ -26,6 +26,9 @@ with this program; if not, write to the Free Software Foundation, Inc.,
#define WATER_ALPHA 160
#define WATER_VISC 1
#define LAVA_VISC 7
// TODO: Get rid of these and set up some attributes like toughness,
// fluffyness, and a funciton to calculate time and durability loss
// (and sound? and whatever else) from them
@ -374,6 +377,7 @@ void content_mapnode_init()
f->liquid_type = LIQUID_FLOWING;
f->liquid_alternative_flowing = CONTENT_WATER;
f->liquid_alternative_source = CONTENT_WATERSOURCE;
f->liquid_viscosity = WATER_VISC;
f->vertex_alpha = WATER_ALPHA;
if(f->special_material == NULL && g_texturesource)
{
@ -421,6 +425,7 @@ void content_mapnode_init()
f->dug_item = std::string("MaterialItem2 ")+itos(i)+" 1";
f->liquid_alternative_flowing = CONTENT_WATER;
f->liquid_alternative_source = CONTENT_WATERSOURCE;
f->liquid_viscosity = WATER_VISC;
f->vertex_alpha = WATER_ALPHA;
if(f->special_material == NULL && g_texturesource)
{
@ -451,6 +456,7 @@ void content_mapnode_init()
f->liquid_type = LIQUID_FLOWING;
f->liquid_alternative_flowing = CONTENT_LAVA;
f->liquid_alternative_source = CONTENT_LAVASOURCE;
f->liquid_viscosity = LAVA_VISC;
f->damage_per_second = 4*2;
if(f->special_material == NULL && g_texturesource)
{
@ -499,6 +505,7 @@ void content_mapnode_init()
f->dug_item = std::string("MaterialItem2 ")+itos(i)+" 1";
f->liquid_alternative_flowing = CONTENT_LAVA;
f->liquid_alternative_source = CONTENT_LAVASOURCE;
f->liquid_viscosity = LAVA_VISC;
f->damage_per_second = 4*2;
if(f->special_material == NULL && g_texturesource)
{

35
src/map.cpp
View File

@ -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)

5
src/mapnode.h
View File

@ -153,6 +153,10 @@ struct ContentFeatures
content_t liquid_alternative_flowing;
// If the content is liquid, this is the source version of the liquid.
content_t liquid_alternative_source;
// Viscosity for fluid flow, ranging from 1 to 7, with
// 1 giving almost instantaneous propagation and 7 being
// the slowest possible
u8 liquid_viscosity;
// Used currently for flowing liquids
u8 vertex_alpha;
// Special irrlicht material, used sometimes
@ -189,6 +193,7 @@ struct ContentFeatures
initial_metadata = NULL;
liquid_alternative_flowing = CONTENT_IGNORE;
liquid_alternative_source = CONTENT_IGNORE;
liquid_viscosity = 0;
vertex_alpha = 255;
special_material = NULL;
special_atlas = NULL;