// Physics loop
bool Physics::update()
{
if(!enabled)
{
return true;
}
// Check if needs to be updated
if(simList.empty())
{
return true;
}
clock_t starttime = clock();
std::vector<sint32> toRemove;
std::vector<vec> toAdd;
Screen::get()->log("Simulating " + dtos(simList.size()) + " items!");
uint32 listSize = simList.size();
// Iterate each simulation
for(uint32 simIt = 0; simIt < listSize; simIt++)
{
vec pos = simList[simIt].blocks[0].pos;
// Blocks
uint8 block, meta;
Map::get()->getBlock(pos, &block, &meta);
simList[simIt].blocks[0].id = block;
simList[simIt].blocks[0].meta = meta;
// Water simulation
if(simList[simIt].type == TYPE_WATER)
{
if(isWaterBlock(block))
{
sint32 it = 0;
//for(sint32 it=simList[simIt].blocks.size()-1; it>=0; it--)
{
bool havesource = false;
// Search for water source if this is not the source
if(simList[simIt].blocks[it].id != BLOCK_STATIONARY_WATER)
{
for(int i = 0; i < 6; i++)
{
vec local(pos);
switch(i)
{
case 0: local += vec( 0, 1, 0); break; //y++
case 1: local += vec( 1, 0, 0); break; //x++
case 2: local += vec(-1, 0, 0); break; //x--
case 3: local += vec( 0, 0, 1); break; //z++
case 4: local += vec( 0, 0, -1); break; //z--
case 5: local += vec( 0, -1, 0); break; //y--
}
// Search neighboring water blocks for source current
if (Map::get()->getBlock(local, &block, &meta) && isWaterBlock(block))
{
// is this the source block
if(i != 5 && (block == BLOCK_STATIONARY_WATER || (meta&0x07) < (simList[simIt].blocks[it].meta&0x07) || i == 0))
{
havesource = true;
}
//Else we have to search for source to this block also
else if(i == 5 || (meta&0x07) > (simList[simIt].blocks[it].meta&0x07))
{
toAdd.push_back(local);
}
}
}
}
//Stationary water block is the source
else
{
havesource = true;
}
//If no source, dry block away
if(!havesource)
{
//This block will change so add surrounding blocks to simulation
for(uint32 i = 0; i < toAdd.size(); i++)
{
addSimulation(toAdd[i]);
}
//If not dried out yet
if(!(simList[simIt].blocks[it].meta&0x8) && (simList[simIt].blocks[it].meta&0x07) < M7)
{
// Set new water level
block = BLOCK_WATER;
meta = simList[simIt].blocks[it].meta+1;
Map::get()->setBlock(pos, block, meta);
Map::get()->sendBlockChange(pos, block, meta);
toRemove.push_back(simIt);
addSimulation(pos);
// Update simulation meta information
// simList[simIt].blocks[it].meta = meta;
}
//Else this block has dried out
else
{
//Clear and remove simulation
Map::get()->setBlock(pos, BLOCK_AIR, 0);
Map::get()->sendBlockChange(pos, BLOCK_AIR, 0);
toRemove.push_back(simIt);
//If below this block has another waterblock, simulate it also
if(Map::get()->getBlock(pos - vec(0, 1, 0), &block, &meta) &&
isWaterBlock(block))
addSimulation(pos - vec(0, 1, 0));
}
}
//Have source!
else
{
toAdd.clear();
vec belowPos(pos - vec(0, 1, 0));
// If below is free to fall
if(Map::get()->getBlock(belowPos, &block, &meta) &&
mayFallThrough(block))
{
// Set new fallblock there
block = BLOCK_WATER;
meta = M_FALLING;
Map::get()->setBlock(belowPos, block, meta);
Map::get()->sendBlockChange(belowPos, block, meta);
// Change simulation-block to current block
toRemove.push_back(simIt);
addSimulation(belowPos);
}
//Else if spreading to sides
//If water level is at minimum, dont simulate anymore
else if((simList[simIt].blocks[it].meta&M7) != M7)
{
for(int i = 0; i < 4; i++)
{
vec local(pos);
switch(i)
{
case 0: local += vec( 1, 0, 0); break;
case 1: local += vec(-1, 0, 0); break;
case 2: local += vec( 0, 0, 1); break;
case 3: local += vec( 0, 0, -1); break;
}
if(Map::get()->getBlock(local, &block, &meta) &&
mayFallThrough(block))
{
//Decrease water level each turn
if(!isWaterBlock(block) || meta > (simList[simIt].blocks[it].meta&0x07)+1)
{
meta = (simList[simIt].blocks[it].meta&0x07)+1;
Map::get()->setBlock(local, BLOCK_WATER, meta);
Map::get()->sendBlockChange(local, BLOCK_WATER, meta);
addSimulation(local);
}
}
} // End for i=0:3
//Remove this block from simulation
toRemove.push_back(simIt);
}
//Water level at minimum
else
{
//Remove this block from simulation
toRemove.push_back(simIt);
}
}
}
}
//Block has changes
else
{
//Remove this block from simulation
toRemove.push_back(simIt);
}
}
else
{
//Remove this block from simulation
toRemove.push_back(simIt);
}
}
std::vector<int>::reverse_iterator rit;
for ( rit = toRemove.rbegin() ; rit < toRemove.rend(); ++rit )
{
simList.erase(simList.begin()+*rit);
}
clock_t endtime = clock()-starttime;
Screen::get()->log("Exit simulation, took " + dtos(endtime*1000/CLOCKS_PER_SEC) + " ms, " + dtos(simList.size()) + " items left");
return true;
}
// Physics loop
bool Physics::update()
{
updateFall();
updateMinecart();
if (!enabled)
{
return true;
}
// Check if needs to be updated
if (simList.empty())
{
return true;
}
std::vector<vec> toAdd;
std::vector<vec> toRem;
std::set<vec> changed;
clock_t starttime = clock();
LOG(INFO, "Physics", "Simulating " + dtos(simList.size()) + " items!");
uint32_t listSize = simList.size();
for (uint32_t simIt = 0; simIt < listSize; simIt++)
{
vec pos = simList[simIt].blocks[0].pos;
// Blocks
uint8_t block, meta;
ServerInstance->map(map)->getBlock(pos, &block, &meta);
simList[simIt].blocks[0].id = block;
simList[simIt].blocks[0].meta = meta;
bool used = false;
for (int i = 0; i < 5; i++)
{
vec local(pos);
bool falling = false;
switch (i)
{
case 0:
local += vec(0, -1, 0); // First tries to go down
falling = true;
break;
case 1:
local += vec(1, 0, 0); // Might be bad to have the 4 cardinal dir'
// so predictable
break;
case 2:
local += vec(-1, 0, 0);
break;
case 3:
local += vec(0, 0, 1);
break;
case 4:
local += vec(0, 0, -1);
break;
case 5:
// local += vec(0,1,0); // Going UP
break;
}
uint8_t newblock, newmeta;
ServerInstance->map(map)->getBlock(pos, &block, &meta);
ServerInstance->map(map)->getBlock(local, &newblock, &newmeta);
if (!isLiquidBlock(block))
{
toRem.push_back(pos);
break;
}
if ((isWaterBlock(newblock) && isWaterBlock(block)) || (isLavaBlock(newblock) && isLavaBlock(block)) || (isLiquidBlock(block) && mayFallThrough(newblock)))
{
if (falling && !isLiquidBlock(newblock))
{
ServerInstance->map(map)->setBlock(local, block, meta);
changed.insert(local);
ServerInstance->map(map)->setBlock(pos, BLOCK_AIR, 0);
changed.insert(pos);
toRem.push_back(pos);
toAdd.push_back(local);
used = true;
continue;
}
if (falling && isLiquidBlock(newblock))
{
int top = 8 - meta;
int bot = 8 - newmeta;
int volume = top + bot;
if (volume > 8)
{
top = volume - 8;
bot = 8;
}
else
{
top = 0;
bot = volume;
}
int a_meta = 8 - top;
int a_newmeta = 8 - bot;
toAdd.push_back(local);
if (a_meta == meta && a_newmeta == newmeta)
{
toRem.push_back(pos);
toRem.push_back(local);
continue;
}
if ((isWaterBlock(block) && a_meta < 8) || (isLavaBlock(block) && a_meta < 4))
{
ServerInstance->map(map)->setBlock(pos, block, a_meta);
changed.insert(pos);
}
else
{
ServerInstance->map(map)->setBlock(pos, BLOCK_AIR, 0);
changed.insert(pos);
}
ServerInstance->map(map)->setBlock(local, block, a_newmeta);
used = true;
toAdd.push_back(local);
toAdd.push_back(pos);
changed.insert(pos);
continue;
}
if (!isLiquidBlock(newblock))
{
if (!falling)
{
if ((isWaterBlock(block) && meta == 7) || (isLavaBlock(block) && meta >= 3))
{
toRem.push_back(pos);
break;
}
}
// We are spreading onto dry area.
newmeta = 7;
ServerInstance->map(map)->setBlock(local, block, newmeta);
changed.insert(local);
meta++;
if (meta < 8)
{
ServerInstance->map(map)->setBlock(pos, block, meta);
changed.insert(pos);
}
else
{
ServerInstance->map(map)->setBlock(pos, BLOCK_AIR, 0);
changed.insert(pos);
toRem.push_back(pos);
}
toAdd.push_back(local);
used = true;
continue;
}
if (meta < newmeta - 1 || (meta == newmeta && falling))
{
newmeta --;
ServerInstance->map(map)->setBlock(local, block, newmeta);
changed.insert(local);
meta ++;
if (meta < 8)
{
ServerInstance->map(map)->setBlock(pos, block, meta);
changed.insert(pos);
}
else
{
ServerInstance->map(map)->setBlock(pos, BLOCK_AIR, 0);
changed.insert(pos);
toRem.push_back(pos);
}
toAdd.push_back(local);
used = true;
continue;
}
}
}
if (!used)
{
toRem.push_back(pos);
}
}
for (int i = int(toRem.size()) - 1; i >= 0; i--)
{
removeSimulation(toRem[i]);
}
for (size_t i = 0; i < toAdd.size(); i++)
{
addSimulation(toAdd[i]);
}
ServerInstance->map(map)->sendMultiBlocks(changed);
clock_t endtime = clock() - starttime;
// LOG(INFO, "Physics", "Exit simulation, took " + dtos(endtime * 1000 / CLOCKS_PER_SEC) + " ms, " + dtos(simList.size()) + " items left");
return true;
}