minenux
/
minetest-engine-multicraft2
1
0
Fork 0
Code Releases Activity

switched to old transformLiquids, new one is not ready

mutilcraft-mt53
Perttu Ahola 2011-07-23 16:46:34 +03:00
parent 98be778766
commit 976ec31c1f
1 changed files with 223 additions and 214 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

437
src/map.cpp
View File

@ -1540,17 +1540,6 @@ void Map::PrintInfo(std::ostream &out)
#define WATER_DROP_BOOST 4
enum NeighborType {
NEIGHBOR_UPPER,
NEIGHBOR_SAME_LEVEL,
NEIGHBOR_LOWER
};
struct NodeNeighbor {
MapNode n;
NeighborType t;
v3s16 p;
};
void Map::transformLiquids(core::map<v3s16, MapBlock*> & modified_blocks)
{
DSTACK(__FUNCTION_NAME);
@ -1570,220 +1559,240 @@ void Map::transformLiquids(core::map<v3s16, MapBlock*> & modified_blocks)
v3s16 p0 = m_transforming_liquid.pop_front();
MapNode n0 = getNodeNoEx(p0);
/*
Collect information about current node
*/
s8 liquid_level = -1;
u8 liquid_kind = CONTENT_IGNORE;
LiquidType liquid_type = content_features(n0.d).liquid_type;
switch (liquid_type) {
case LIQUID_SOURCE:
liquid_level = 8;
liquid_kind = content_features(n0.d).liquid_alternative_flowing;
break;
case LIQUID_FLOWING:
liquid_level = (n0.param2 & LIQUID_LEVEL_MASK);
liquid_kind = n0.d;
break;
case LIQUID_NONE:
// if this is an air node, it *could* be transformed into a liquid. otherwise,
// continue with the next node.
if (n0.d != CONTENT_AIR)
continue;
liquid_kind = CONTENT_AIR;
break;
}
/*
Collect information about the environment
*/
v3s16 dirs[6] = {
v3s16( 0, 1, 0), // top
v3s16( 0,-1, 0), // bottom
v3s16( 1, 0, 0), // right
v3s16(-1, 0, 0), // left
v3s16( 0, 0, 1), // back
v3s16( 0, 0,-1), // front
};
NodeNeighbor sources[6]; // surrounding sources
int num_sources = 0;
NodeNeighbor flows[6]; // surrounding flowing liquid nodes
int num_flows = 0;
NodeNeighbor airs[6]; // surrounding air
int num_airs = 0;
NodeNeighbor neutrals[6]; // nodes that are solid or another kind of liquid
int num_neutrals = 0;
bool flowing_down = false;
for (u16 i = 0; i < 6; i++) {
NeighborType nt = NEIGHBOR_SAME_LEVEL;
switch (i) {
case 0:
nt = NEIGHBOR_UPPER;
break;
case 1:
nt = NEIGHBOR_LOWER;
break;
}
v3s16 npos = p0 + dirs[i];
NodeNeighbor nb = {getNodeNoEx(npos), nt, npos};
switch (content_features(nb.n.d).liquid_type) {
case LIQUID_NONE:
if (nb.n.d == CONTENT_AIR) {
airs[num_airs++] = nb;
// if the current node happens to be a flowing node, it will start to flow down here.
if (nb.t == NEIGHBOR_LOWER)
flowing_down = true;
} else {
neutrals[num_neutrals++] = nb;
}
break;
case LIQUID_SOURCE:
// if this node is not (yet) of a liquid type, choose the first liquid type we encounter
if (liquid_kind == CONTENT_AIR)
liquid_kind = content_features(nb.n.d).liquid_alternative_flowing;
if (content_features(nb.n.d).liquid_alternative_flowing !=liquid_kind) {
neutrals[num_neutrals++] = nb;
} else {
sources[num_sources++] = nb;
}
break;
case LIQUID_FLOWING:
// if this node is not (yet) of a liquid type, choose the first liquid type we encounter
if (liquid_kind == CONTENT_AIR)
liquid_kind = content_features(nb.n.d).liquid_alternative_flowing;
if (content_features(nb.n.d).liquid_alternative_flowing != liquid_kind) {
neutrals[num_neutrals++] = nb;
} else {
flows[num_flows++] = nb;
if (nb.t == NEIGHBOR_LOWER)
flowing_down = true;
}
break;
}
}
/*
decide on the type (and possibly level) of the current node
*/
u8 new_node_content;
s8 new_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
// it's perfectly safe to use liquid_kind here to determine the new node content.
new_node_content = content_features(liquid_kind).liquid_alternative_source;
} 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 = 7;
} 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 = 7;
if (nb_liquid_level + WATER_DROP_BOOST < 7)
new_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;
}
break;
}
}
// don't flow as far in open terrain - if there isn't at least one adjacent solid block,
// substract another unit from the resulting water level.
if (!flowing_down && new_node_level >= 1) {
bool at_wall = false;
for (u16 i = 0; i < num_neutrals; i++) {
if (neutrals[i].t == NEIGHBOR_SAME_LEVEL) {
at_wall = true;
break;
}
}
if (!at_wall)
new_node_level -= 1;
}
if (new_node_level >= 0)
new_node_content = liquid_kind;
else
new_node_content = CONTENT_AIR;
}
/*
check if anything has changed. if not, just continue with the next node.
*/
if (new_node_content == n0.d && (content_features(n0.d).liquid_type != LIQUID_FLOWING ||
((n0.param2 & LIQUID_LEVEL_MASK) == (u8)new_node_level &&
((n0.param2 & LIQUID_FLOW_DOWN_MASK) == LIQUID_FLOW_DOWN_MASK)
== flowing_down)))
// Don't deal with non-liquids
if(content_liquid(n0.d) == false)
continue;
bool is_source = !content_flowing_liquid(n0.d);
u8 liquid_level = 8;
if(is_source == false)
liquid_level = n0.param2 & 0x0f;
// Turn possible source into non-source
u8 nonsource_c = make_liquid_flowing(n0.d);
/*
update the current node
*/
bool flow_down_enabled = (flowing_down && ((n0.param2 & LIQUID_FLOW_DOWN_MASK) != LIQUID_FLOW_DOWN_MASK));
n0.d = new_node_content;
if (content_features(n0.d).liquid_type == LIQUID_FLOWING) {
// set level to last 3 bits, flowing down bit to 4th bit
n0.param2 = (flowing_down ? LIQUID_FLOW_DOWN_MASK : 0x00) | (new_node_level & LIQUID_LEVEL_MASK);
} else {
n0.param2 = 0;
If not source, check that some node flows into this one
and what is the level of liquid in this one
*/
if(is_source == false)
{
s8 new_liquid_level_max = -1;
v3s16 dirs_from[5] = {
v3s16(0,1,0), // top
v3s16(0,0,1), // back
v3s16(1,0,0), // right
v3s16(0,0,-1), // front
v3s16(-1,0,0), // left
};
for(u16 i=0; i<5; i++)
{
bool from_top = (i==0);
v3s16 p2 = p0 + dirs_from[i];
MapNode n2 = getNodeNoEx(p2);
if(content_liquid(n2.d))
{
u8 n2_nonsource_c = make_liquid_flowing(n2.d);
// Check that the liquids are the same type
if(n2_nonsource_c != nonsource_c)
{
dstream<<"WARNING: Not handling: different liquids"
" collide"<<std::endl;
continue;
}
bool n2_is_source = !content_flowing_liquid(n2.d);
s8 n2_liquid_level = 8;
if(n2_is_source == false)
n2_liquid_level = n2.param2 & 0x07;
s8 new_liquid_level = -1;
if(from_top)
{
//new_liquid_level = 7;
if(n2_liquid_level >= 7 - WATER_DROP_BOOST)
new_liquid_level = 7;
else
new_liquid_level = n2_liquid_level + WATER_DROP_BOOST;
}
else if(n2_liquid_level > 0)
{
new_liquid_level = n2_liquid_level - 1;
}
if(new_liquid_level > new_liquid_level_max)
new_liquid_level_max = new_liquid_level;
}
} //for
/*
If liquid level should be something else, update it and
add all the neighboring water nodes to the transform queue.
*/
if(new_liquid_level_max != liquid_level)
{
if(new_liquid_level_max == -1)
{
// Remove water alltoghether
n0.d = CONTENT_AIR;
n0.param2 = 0;
setNode(p0, n0);
}
else
{
n0.param2 = new_liquid_level_max;
setNode(p0, n0);
}
// Block has been modified
{
v3s16 blockpos = getNodeBlockPos(p0);
MapBlock *block = getBlockNoCreateNoEx(blockpos);
if(block != NULL)
modified_blocks.insert(blockpos, block);
}
/*
Add neighboring non-source liquid nodes to transform queue.
*/
v3s16 dirs[6] = {
v3s16(0,0,1), // back
v3s16(0,1,0), // top
v3s16(1,0,0), // right
v3s16(0,0,-1), // front
v3s16(0,-1,0), // bottom
v3s16(-1,0,0), // left
};
for(u16 i=0; i<6; i++)
{
v3s16 p2 = p0 + dirs[i];
MapNode n2 = getNodeNoEx(p2);
if(content_flowing_liquid(n2.d))
{
m_transforming_liquid.push_back(p2);
}
}
}
}
setNode(p0, n0);
v3s16 blockpos = getNodeBlockPos(p0);
MapBlock *block = getBlockNoCreateNoEx(blockpos);
if(block != NULL)
modified_blocks.insert(blockpos, block);
// Get a new one from queue if the node has turned into non-water
if(content_liquid(n0.d) == false)
continue;
/*
enqueue neighbors for update if neccessary
*/
switch (content_features(n0.d).liquid_type) {
case LIQUID_SOURCE:
// make sure source flows into all neighboring nodes
for (u16 i = 0; i < num_flows; i++)
if (flows[i].t != NEIGHBOR_UPPER)
m_transforming_liquid.push_back(flows[i].p);
for (u16 i = 0; i < num_airs; i++)
if (airs[i].t != NEIGHBOR_UPPER)
m_transforming_liquid.push_back(airs[i].p);
break;
case LIQUID_NONE:
// this flow has turned to air; neighboring flows might need to do the same
for (u16 i = 0; i < num_flows; i++)
m_transforming_liquid.push_back(flows[i].p);
break;
case LIQUID_FLOWING:
for (u16 i = 0; i < num_flows; i++) {
u8 flow_level = (flows[i].n.param2 & LIQUID_LEVEL_MASK);
// liquid_level is still the ORIGINAL level of this node.
if (flows[i].t != NEIGHBOR_UPPER && ((flow_level < liquid_level || flow_level < new_node_level) ||
flow_down_enabled))
m_transforming_liquid.push_back(flows[i].p);
Flow water from this node
*/
v3s16 dirs_to[5] = {
v3s16(0,-1,0), // bottom
v3s16(0,0,1), // back
v3s16(1,0,0), // right
v3s16(0,0,-1), // front
v3s16(-1,0,0), // left
};
for(u16 i=0; i<5; i++)
{
bool to_bottom = (i == 0);
// If liquid is at lowest possible height, it's not going
// anywhere except down
if(liquid_level == 0 && to_bottom == false)
continue;
u8 liquid_next_level = 0;
// If going to bottom
if(to_bottom)
{
//liquid_next_level = 7;
if(liquid_level >= 7 - WATER_DROP_BOOST)
liquid_next_level = 7;
else
liquid_next_level = liquid_level + WATER_DROP_BOOST;
}
else
liquid_next_level = liquid_level - 1;
bool n2_changed = false;
bool flowed = false;
v3s16 p2 = p0 + dirs_to[i];
MapNode n2 = getNodeNoEx(p2);
//dstream<<"[1] n2.param="<<(int)n2.param<<std::endl;
if(content_liquid(n2.d))
{
u8 n2_nonsource_c = make_liquid_flowing(n2.d);
// Check that the liquids are the same type
if(n2_nonsource_c != nonsource_c)
{
dstream<<"WARNING: Not handling: different liquids"
" collide"<<std::endl;
continue;
}
for (u16 i = 0; i < num_airs; i++) {
if (airs[i].t != NEIGHBOR_UPPER && (airs[i].t == NEIGHBOR_LOWER || new_node_level > 0))
m_transforming_liquid.push_back(airs[i].p);
bool n2_is_source = !content_flowing_liquid(n2.d);
u8 n2_liquid_level = 8;
if(n2_is_source == false)
n2_liquid_level = n2.param2 & 0x07;
if(to_bottom)
{
flowed = true;
}
if(n2_is_source)
{
// Just flow into the source, nothing changes.
// n2_changed is not set because destination didn't change
flowed = true;
}
else
{
if(liquid_next_level > liquid_level)
{
n2.param2 = liquid_next_level;
setNode(p2, n2);
n2_changed = true;
flowed = true;
}
}
}
else if(n2.d == CONTENT_AIR)
{
n2.d = nonsource_c;
n2.param2 = liquid_next_level;
setNode(p2, n2);
n2_changed = true;
flowed = true;
}
//dstream<<"[2] n2.param="<<(int)n2.param<<std::endl;
if(n2_changed)
{
m_transforming_liquid.push_back(p2);
v3s16 blockpos = getNodeBlockPos(p2);
MapBlock *block = getBlockNoCreateNoEx(blockpos);
if(block != NULL)
modified_blocks.insert(blockpos, block);
}
// If n2_changed to bottom, don't flow anywhere else
if(to_bottom && flowed && !is_source)
break;
}
loopcount++;
//if(loopcount >= 100000)
if(loopcount >= initial_size * 10) {
if(loopcount >= initial_size * 1)
break;
}
}
//dstream<<"Map::transformLiquids(): loopcount="<<loopcount<<std::endl;
}