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field.cpp
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#include "rng.h"
#include "map.h"
#include "field.h"
#include "game.h"
#include "monstergenerator.h"
#include "messages.h"
#define INBOUNDS(x, y) \
(x >= 0 && x < SEEX * my_MAPSIZE && y >= 0 && y < SEEY * my_MAPSIZE)
field_t fieldlist[num_fields];
void game::init_fields()
{
field_t tmp_fields[num_fields] =
{
{
"fd_null",
{"", "", ""}, '%', 0,
{c_white, c_white, c_white}, {true, true, true}, {false, false, false}, 0,
{0,0,0}
},
{
"fd_blood",
{_("blood splatter"), _("blood stain"), _("puddle of blood")}, '%', 0,
{c_red, c_red, c_red}, {true, true, true}, {false, false, false}, 28800,
{0,0,0}
},
{
"fd_bile",
{_("bile splatter"), _("bile stain"), _("puddle of bile")}, '%', 0,
{c_pink, c_pink, c_pink}, {true, true, true}, {false, false, false}, 14400,
{0,0,0}
},
{
"fd_gibs_flesh",
{_("scraps of flesh"), _("bloody meat chunks"), _("heap of gore")}, '~', 0,
{c_brown, c_ltred, c_red}, {true, true, true}, {false, false, false}, 28800,
{0,0,0}
},
{
"fd_gibs_veggy",
{_("shredded leaves and twigs"), _("shattered branches and leaves"), _("broken vegetation tangle")}, '~', 0,
{c_ltgreen, c_ltgreen, c_green}, {true, true, true}, {false, false, false}, 28800,
{0,0,0}
},
{
"fd_web",
{_("cobwebs"),_("webs"), _("thick webs")}, '}', 2,
{c_white, c_white, c_white}, {true, true, false},{false, false, false}, 0,
{0,0,0}
},
{
"fd_slime",
{_("slime trail"), _("slime stain"), _("puddle of slime")}, '%', 0,
{c_ltgreen, c_ltgreen, c_green},{true, true, true},{false, false, false}, 14400,
{0,0,0}
},
{
"fd_acid",
{_("acid splatter"), _("acid streak"), _("pool of acid")}, '5', 2,
{c_ltgreen, c_green, c_green}, {true, true, true}, {true, true, true}, 10,
{0,0,0}
},
{
"fd_sap",
{_("sap splatter"), _("glob of sap"), _("pool of sap")}, '5', 2,
{c_yellow, c_brown, c_brown}, {true, true, true}, {true, true, true}, 20,
{0,0,0}
},
{
"fd_sludge",
{_("thin sludge trail"), _("sludge trail"), _("thick sludge trail")}, '5', 2,
{c_ltgray, c_dkgray, c_black}, {true, true, true}, {false, false, false}, 3600,
{0,0,0}
},
{
"fd_fire",
{_("small fire"), _("fire"), _("raging fire")}, '4', 4,
{c_yellow, c_ltred, c_red}, {true, true, true}, {true, true, true}, 800,
{0,0,0}
},
{
"fd_rubble",
{_("legacy rubble"), _("legacy rubble"), _("legacy rubble")}, '#', 0,
{c_dkgray, c_dkgray, c_dkgray}, {true, true, true},{false, false, false}, 1,
{0,0,0}
},
{
"fd_smoke",
{_("thin smoke"), _("smoke"), _("thick smoke")}, '8', 8,
{c_white, c_ltgray, c_dkgray}, {true, false, false},{false, true, true}, 300,
{0,0,0}
},
{
"fd_toxic_gas",
{_("hazy cloud"),_("toxic gas"),_("thick toxic gas")}, '8', 8,
{c_white, c_ltgreen, c_green}, {true, false, false},{false, true, true}, 900,
{0,0,0}
},
{
"fd_tear_gas",
{_("hazy cloud"),_("tear gas"),_("thick tear gas")}, '8', 8,
{c_white, c_yellow, c_brown}, {true, false, false},{true, true, true}, 600,
{0,0,0}
},
{
"fd_nuke_gas",
{_("hazy cloud"),_("radioactive gas"), _("thick radioactive gas")}, '8', 8,
{c_white, c_ltgreen, c_green}, {true, true, false}, {true, true, true}, 1000,
{0,0,0}
},
{
"fd_gas_vent",
{_("gas vent"), _("gas vent"), _("gas vent")}, '%', 0,
{c_white, c_white, c_white}, {true, true, true}, {false, false, false}, 0,
{0,0,0}
},
{ // Fire Vents
"fd_fire_vent",
{"", "", ""}, '&', -1,
{c_white, c_white, c_white}, {true, true, true}, {false, false, false}, 0,
{0,0,0}
},
{
"fd_flame_burst",
{_("fire"), _("fire"), _("fire")}, '5', 4,
{c_red, c_red, c_red}, {true, true, true}, {true, true, true}, 0,
{0,0,0}
},
{
"fd_electricity",
{_("sparks"), _("electric crackle"), _("electric cloud")}, '9', 4,
{c_white, c_cyan, c_blue}, {true, true, true}, {true, true, true}, 2,
{0,0,0}
},
{
"fd_fatigue",
{_("odd ripple"), _("swirling air"), _("tear in reality")}, '*', 8,
{c_ltgray, c_dkgray, c_magenta},{true, true, false},{false, false, false}, 0,
{0,0,0}
},
{ //Push Items
"fd_push_items",
{"", "", ""}, '&', -1,
{c_white, c_white, c_white}, {true, true, true}, {false, false, false}, 0,
{0,0,0}
},
{ // shock vents
"fd_shock_vent",
{"", "", ""}, '&', -1,
{c_white, c_white, c_white}, {true, true, true}, {false, false, false}, 0,
{0,0,0}
},
{ // acid vents
"fd_acid_vent",
{"", "", ""}, '&', -1,
{c_white, c_white, c_white}, {true, true, true}, {false, false, false}, 0,
{0,0,0}
},
{ // plasma glow (for plasma weapons)
"fd_plasma",
{_("faint plasma"), _("glowing plasma"), _("glaring plasma")}, '9', 4,
{c_magenta, c_pink, c_white}, {true, true, true}, {false, false, false}, 2,
{0,0,0}
},
{ // laser beam (for laser weapons)
"fd_laser",
{_("faint glimmer"), _("beam of light"), _("intense beam of light")}, '#', 4,
{c_blue, c_ltblue, c_white}, {true, true, true}, {false, false, false}, 1,
{0,0,0}
},
{
"fd_spotlight",
{ _("spotlight"), _("spotlight"), _("spotlight") }, '&', 1,
{c_white, c_white, c_white}, { true, true, true }, { false, false, false }, 1,
{0,0,0}
},
{
"fd_dazzling",
{ _("dazzling"), _("dazzling"), _("dazzling") }, '#', 4,
{c_ltred_yellow, c_ltred_yellow, c_ltred_yellow}, { true, true, true }, { false, false, false }, 1,
{ 0, 0, 0 }
},
{
"fd_blood_veggy",
{_("plant sap splatter"), _("plant sap stain"), _("puddle of resin")}, '%', 0,
{c_ltgreen, c_ltgreen, c_ltgreen}, {true, true, true}, {false, false, false}, 28800,
{0,0,0}
},
{
"fd_blood_insect",
{_("bug blood splatter"), _("bug blood stain"), _("puddle of bug blood")}, '%', 0,
{c_green, c_green, c_green}, {true, true, true}, {false, false, false}, 28800,
{0,0,0}
},
{
"fd_blood_invertebrate",
{_("hemolymph splatter"), _("hemolymph stain"), _("puddle of hemolymph")}, '%', 0,
{c_ltgray, c_ltgray, c_ltgray}, {true, true, true}, {false, false, false}, 28800,
{0,0,0}
},
{
"fd_gibs_insect",
{_("shards of chitin"), _("shattered bug leg"), _("torn insect organs")}, '~', 0,
{c_ltgreen, c_green, c_yellow}, {true, true, true}, {false, false, false}, 28800,
{0,0,0}
},
{
"fd_gibs_invertebrate",
{_("gooey scraps"), _("icky mess"), _("heap of squishy gore")}, '~', 0,
{c_ltgray, c_ltgray, c_dkgray}, {true, true, true}, {false, false, false}, 28800,
{0,0,0}
},
{
"fd_cigsmoke",
{_("swirl of tobacco smoke"), _("tobacco smoke"), _("thick tobacco smoke")}, '%', 8,
{c_white, c_ltgray, c_dkgray}, {true, true, true},{false, false, false}, 350,
{0,0,0}
},
{
"fd_weedsmoke",
{_("swirl of pot smoke"), _("pot smoke"), _("thick pot smoke")}, '%', 8,
{c_white, c_ltgray, c_dkgray}, {true, true, true},{false, false, false}, 325,
{0,0,0}
},
{
"fd_cracksmoke",
{_("swirl of crack smoke"), _("crack smoke"), _("thick crack smoke")}, '%', 8,
{c_white, c_ltgray, c_dkgray}, {true, true, true},{false, false, false}, 225,
{0,0,0}
},
{
"fd_methsmoke",
{_("swirl of meth smoke"), _("meth smoke"), _("thick meth smoke")}, '%', 8,
{c_white, c_ltgray, c_dkgray}, {true, true, true},{false, false, false}, 275,
{0,0,0}
},
{
"fd_bees",
{_("some bees"), _("swarm of bees"), _("angry swarm of bees")}, '8', 8,
{c_white, c_ltgray, c_dkgray}, {true, true, true},{true, true, true}, 1000,
{0,0,0}
},
{
"fd_incendiary",
{_("smoke"),_("airborne incendiary"), _("airborne incendiary")}, '8', 8,
{c_white, c_ltred, c_ltred_red}, {true, true, false}, {true, true, true}, 500,
{0,0,0}
},
{
"fd_relax_gas",
{_("hazy cloud"),_("sedative gas"),_("relaxation gas")}, '.', 8,
{ c_white, c_pink, c_cyan }, { true, true, true }, { false, true, true }, 500,
{0,0,0}
},
{
"fd_fungal_haze",
{_("hazy cloud"),_("fungal haze"),_("thick fungal haze")}, '.', 8,
{ c_white, c_cyan, c_cyan }, { true, true, false }, { true, true, true }, 40,
{0,0,0}
},
{
"fd_hot_air1",
{"", "", ""}, '&', -1,
{c_white, c_yellow, c_red}, {true, true, true}, {false, false, false}, 500,
{0,0,0}
},
{
"fd_hot_air2",
{"", "", ""}, '&', -1,
{c_white, c_yellow, c_red}, {true, true, true}, {false, false, false}, 500,
{0,0,0}
},
{
"fd_hot_air3",
{"", "", ""}, '&', -1,
{c_white, c_yellow, c_red}, {true, true, true}, {false, false, false}, 500,
{0,0,0}
},
{
"fd_hot_air4",
{"", "", ""}, '&', -1,
{c_white, c_yellow, c_red}, {true, true, true}, {false, false, false}, 500,
{0,0,0}
}
};
for(int i = 0; i < num_fields; i++) {
fieldlist[i] = tmp_fields[i];
}
}
field_id field_from_ident(const std::string &field_ident)
{
for( size_t i = 0; i < num_fields; i++) {
if( fieldlist[i].id == field_ident ) {
return static_cast<field_id>( i );
}
}
debugmsg( "unknown field ident %s", field_ident.c_str() );
return fd_null;
}
/*
Function: spread_gas
Helper function that encapsulates the logic involved in gas spread.
*/
void map::spread_gas( field_entry *cur, int x, int y, field_id curtype,
int percent_spread, int outdoor_age_speedup )
{
// Reset nearby scents to zero
for (int i = -1; i <= 1; i++) {
for (int j = -1; j <= 1; j++) {
g->scent( x + i, y + j ) = 0;
}
}
// Dissapate faster outdoors.
if (is_outside(x, y)) { cur->setFieldAge( cur->getFieldAge() + outdoor_age_speedup ); }
// Bail out if we don't meet the spread chance.
if( rng(1, 100) > percent_spread ) { return; }
std::vector <point> spread;
// Pick all eligible points to spread to.
for( int a = -1; a <= 1; a++ ) {
for( int b = -1; b <= 1; b++ ) {
// Current field not a candidate.
if( !(a || b) ) { continue; }
const field_entry* tmpfld = get_field( point( x + a, y + b ), curtype );
// Candidates are existing weaker fields or navigable/flagged tiles with no field.
if( (tmpfld && tmpfld->getFieldDensity() < cur->getFieldDensity() &&
(move_cost( x + a, y + b ) > 0 || has_flag("PERMEABLE", x + a, y + b))) ||
(!tmpfld && (move_cost( x + a, y + b ) > 0 || has_flag("PERMEABLE", x + a, y + b))) ) {
spread.push_back( point( x + a, y + b ) );
}
}
}
// Then, spread to a nearby point.
int current_density = cur->getFieldDensity();
int current_age = cur->getFieldAge();
if (current_density > 1 && current_age > 0 && !spread.empty()) {
point p = spread[ rng( 0, spread.size() - 1 ) ];
field_entry *candidate_field = get_field(p.x, p.y).findField( curtype );
int candidate_density = candidate_field ? candidate_field->getFieldDensity() : 0;
// Nearby gas grows thicker, and ages are shared.
int age_fraction = 0.5 + current_age / current_density;
if ( candidate_field ) {
candidate_field->setFieldDensity(candidate_density + 1);
cur->setFieldDensity(current_density - 1);
candidate_field->setFieldAge(candidate_field->getFieldAge() + age_fraction);
cur->setFieldAge(current_age - age_fraction);
// Or, just create a new field.
} else if ( add_field( p.x, p.y, curtype, 1 ) ) {
get_field(p.x, p.y).findField( curtype )->setFieldAge(age_fraction);
cur->setFieldDensity( current_density - 1 );
cur->setFieldAge(current_age - age_fraction);
}
}
}
/*
Function: create_hot_air
Helper function that encapsulates the logic involved in creating hot air.
*/
void map::create_hot_air( int x, int y, int density )
{
int counter = 0;
while (counter < 5) {
int dx = rng(-1, 1);
int dy = rng(-1, 1);
if (density == 1) add_field(x + dx, y + dy, fd_hot_air1, 1);
else if (density == 2) add_field(x + dx, y + dy, fd_hot_air2, 1);
else if (density == 3) add_field(x + dx, y + dy, fd_hot_air3, 1);
else if (density == 4) add_field(x + dx, y + dy, fd_hot_air4, 1);
counter++;
}
}
bool map::process_fields()
{
bool found_field = false;
for (int x = 0; x < my_MAPSIZE; x++) {
for (int y = 0; y < my_MAPSIZE; y++) {
submap * const current_submap = get_submap_at_grid(x, y);
if (current_submap->field_count > 0)
found_field |= process_fields_in_submap(current_submap, x, y);
}
}
if (found_field) {
// For now, just always dirty the transparency cache
// when a field might possibly be changed.
// TODO: check if there are any fields(mostly fire)
// that frequently change, if so set the dirty
// flag, otherwise only set the dirty flag if
// something actually changed
set_transparency_cache_dirty();
}
return found_field;
}
/*
Function: process_fields_in_submap
Iterates over every field on every tile of the given submap given as parameter.
This is the general update function for field effects. This should only be called once per game turn.
If you need to insert a new field behavior per unit time add a case statement in the switch below.
*/
bool map::process_fields_in_submap( submap *const current_submap,
const int submap_x, const int submap_y )
{
// Realistically this is always true, this function only gets called if fields exist.
bool found_field = false;
//Holds m.field_at(x,y).findField(fd_some_field) type returns.
// Just to avoid typing that long string for a temp value.
field_entry *tmpfld = NULL;
field_id curtype; //Holds cur->getFieldType() as thats what the old system used before rewrite.
bool skipIterIncr = false; // keep track on when not to increment it[erator]
//Loop through all tiles in this submap indicated by current_submap
for (int locx = 0; locx < SEEX; locx++) {
for (int locy = 0; locy < SEEY; locy++) {
// This is a translation from local coordinates to submap coords.
// All submaps are in one long 1d array.
int x = locx + submap_x * SEEX;
int y = locy + submap_y * SEEY;
// get a copy of the field variable from the submap;
// contains all the pointers to the real field effects.
field &curfield = current_submap->fld[locx][locy];
for( auto it = curfield.begin(); it != curfield.end();) {
//Iterating through all field effects in the submap's field.
field_entry * cur = &it->second;
curtype = cur->getFieldType();
// Setting our return value. fd_null really doesn't exist anymore,
// its there for legacy support.
if (!found_field && curtype != fd_null) {
found_field = true;
}
// Again, legacy support in the event someone Mods setFieldDensity to allow more values.
if (cur->getFieldDensity() > 3 || cur->getFieldDensity() < 1) {
debugmsg("Whoooooa density of %d", cur->getFieldDensity());
}
// Don't process "newborn" fields. This gives the player time to run if they need to.
if (cur->getFieldAge() == 0) {
curtype = fd_null;
}
int part;
vehicle *veh;
switch (curtype) {
case fd_null:
case num_fields:
break; // Do nothing, obviously. OBVIOUSLY.
case fd_blood:
case fd_blood_veggy:
case fd_blood_insect:
case fd_blood_invertebrate:
case fd_bile:
case fd_gibs_flesh:
case fd_gibs_veggy:
case fd_gibs_insect:
case fd_gibs_invertebrate:
if (has_flag("SWIMMABLE", x, y)) { // Dissipate faster in water
cur->setFieldAge(cur->getFieldAge() + 250);
}
break;
case fd_acid:
{
std::vector<item> contents;
if (has_flag("SWIMMABLE", x, y)) { // Dissipate faster in water
cur->setFieldAge(cur->getFieldAge() + 20);
}
auto items = i_at(x, y);
for( auto melting = items.begin(); melting != items.end(); ) {
// see DEVELOPER_FAQ.txt for how acid resistance is calculated
int chance = melting->acid_resist();
if (chance == 0) {
melting->damage++;
} else if (chance > 0 && chance < 9) {
if (one_in(chance)) {
melting->damage++;
}
}
if (melting->damage >= 5) {
//Destroy the object, age the field.
cur->setFieldAge(cur->getFieldAge() + melting->volume());
contents.insert( contents.begin(),
melting->contents.begin(), melting->contents.end() );
melting = items.erase( melting );
} else {
melting++;
}
}
for( auto &c : contents ) {
add_item_or_charges( x, y, c );
}
}
break;
// Use the normal aging logic below this switch
case fd_web:
break;
case fd_sap:
break;
case fd_sludge:
break;
case fd_slime:
break;
case fd_plasma:
break;
case fd_laser:
break;
// TODO-MATERIALS: use fire resistance
case fd_fire: {
auto items_here = i_at(x, y);
// explosions will destroy items on this square, iterating
// backwards makes sure that every item is visited.
for( int i = (int) items_here.size() - 1; i >= 0; --i ) {
if( i >= (int) items_here.size() ) {
// the last item exploded and destroyed some items,
// now there is a gap (e.g. exploded item has index 10,
// items 9,8,7 have been destroyed, i is now 9 and thereby
// invalid, continue until the index is valid again.
continue;
}
if( items_here[i].type->explode_in_fire() ) {
// make a copy and let the copy explode
item tmp = items_here[i];
i_rem( x, y, i );
tmp.detonate(point(x, y));
}
}
std::vector<item> new_content;
// Consume items as fuel to help us grow/last longer.
bool destroyed = false; //Is the item destroyed?
// Volume, Smoke generation probability, consumed items count
int vol = 0, smoke = 0, consumed = 0;
// The highest # of items this fire can remove in one turn
int max_consume = cur->getFieldDensity() * 2;
for( auto fuel = items_here.begin();
fuel != items_here.end() && consumed < max_consume; ) {
// Stop when we hit the end of the item buffer OR we consumed
// more than max_consume items
destroyed = false;
// Used to feed the fire based on volume of item burnt.
vol = fuel->volume();
it_ammo *ammo_type = NULL; //Special case if its ammo.
if( fuel->is_ammo() ) {
ammo_type = dynamic_cast<it_ammo *>(fuel->type);
}
// Types of ammo with special effects.
bool cookoff = false;
bool special = false;
//Flame type ammo removed so gasoline isn't explosive, it just burns.
if( ammo_type != NULL &&
(ammo_type->id != "gasoline" || ammo_type->id != "diesel" ||
ammo_type->id != "lamp_oil") ) {
cookoff = ammo_type->ammo_effects.count("INCENDIARY") ||
ammo_type->ammo_effects.count("COOKOFF");
special = ammo_type->ammo_effects.count("FRAG") ||
ammo_type->ammo_effects.count("NAPALM") ||
ammo_type->ammo_effects.count("NAPALM_BIG") ||
ammo_type->ammo_effects.count("EXPLOSIVE") ||
ammo_type->ammo_effects.count("EXPLOSIVE_BIG") ||
ammo_type->ammo_effects.count("EXPLOSIVE_HUGE") ||
ammo_type->ammo_effects.count("TEARGAS") ||
ammo_type->ammo_effects.count("SMOKE") ||
ammo_type->ammo_effects.count("SMOKE_BIG") ||
ammo_type->ammo_effects.count("FLASHBANG");
}
// How much more burnt the item will be,
// should be a multiple of 'base_burn_amt'.
int burn_amt = 0;
// 'burn_amt' / 'base_burn_amt' == 1 to 'consumed',
// Right now all materials are 1, except paper, which is 3
// This means paper is consumed 3x as fast
int base_burn_amt = 1;
// How much time to add to the fire's life
int time_added = 0;
if( special || cookoff ) {
const long rounds_exploded = rng( 1, fuel->charges );
// cook off ammo instead of just burning it.
for(int j = 0; j < (rounds_exploded / 10) + 1; j++) {
if( cookoff ) {
// Ammo that cooks off, but doesn't have a
// large intrinsic effect blows up with half
// the ammos damage in force, for each bullet,
// just creating shrapnel.
g->explosion( x, y, ammo_type->damage / 2,
true, false, false );
} else if( special ) {
// If it has a special effect just trigger it.
ammo_effects( x, y, ammo_type->ammo_effects );
}
}
burn_amt = rounds_exploded;
} else if( fuel->made_of("paper") ) {
//paper items feed the fire moderately.
base_burn_amt = 3;
burn_amt = base_burn_amt * (max_consume - consumed);
if (ammo_type != NULL) {
if( fuel->charges - burn_amt < 0 ) {
burn_amt = fuel->charges;
}
}
if (cur->getFieldDensity() == 1) {
time_added = vol * 10;
time_added += (vol * 10) * (burn_amt / base_burn_amt);
}
if (vol >= 4) {
smoke++; //Large paper items give chance to smoke.
}
} else if( fuel->made_of("wood") || fuel->made_of("veggy") ) {
//Wood or vegy items burn slowly.
if (vol <= cur->getFieldDensity() * 10 ||
cur->getFieldDensity() == 3) {
// A single wood item will just maintain at the current level.
time_added = 1;
// ammo has more surface area, and burns quicker
if (one_in( (ammo_type != NULL) ? 25 : 50 )) {
burn_amt = cur->getFieldDensity();
}
} else if( fuel->burnt < cur->getFieldDensity() ) {
burn_amt = 1;
}
smoke++;
} else if( (fuel->made_of("cotton") || fuel->made_of("wool")) &&
!fuel->made_of("nomex") ) {
//Cotton and wool burn slowly but don't feed the fire much.
if (vol <= cur->getFieldDensity() * 5 || cur->getFieldDensity() == 3) {
time_added = 1;
burn_amt = cur->getFieldDensity();
} else if( fuel->burnt < cur->getFieldDensity() ) {
burn_amt = 1;
}
smoke++;
} else if( fuel->made_of("flesh") || fuel->made_of("hflesh") ||
fuel->made_of("iflesh") ) {
//Same as cotton/wool really but more smokey.
if (vol <= cur->getFieldDensity() * 5 ||
(cur->getFieldDensity() == 3 && one_in(vol / 20))) {
time_added = 1;
burn_amt = cur->getFieldDensity();
smoke += 3;
} else if (fuel->burnt < cur->getFieldDensity()) {
burn_amt = 1;
smoke++;
}
} else if( fuel->made_of(LIQUID) ) {
// Lots of smoke if alcohol, and LOTS of fire fueling power
if (fuel->type->id == "gasoline" || fuel->type->id == "diesel") {
time_added = 300;
smoke += 6;
} else if (fuel->type->id == "tequila" || fuel->type->id == "whiskey" ||
fuel->type->id == "vodka" || fuel->type->id == "rum" ||
fuel->type->id == "single_malt_whiskey" || fuel->type->id == "gin" ||
fuel->type->id == "moonshine" || fuel->type->id == "brandy") {
time_added = 250;
smoke += 5;
} else if( fuel->type->id == "lamp_oil" ) {
time_added = 300;
smoke += 3;
} else {
// kills a fire otherwise.
time_added = -rng(80 * vol, 300 * vol);
smoke++;
}
burn_amt = cur->getFieldDensity();
} else if( fuel->made_of("powder") ) {
// Any powder will fuel the fire as much as its volume
// but be immediately destroyed.
time_added = vol;
destroyed = true;
smoke += 2;
} else if( fuel->made_of("plastic") && !fuel->made_of("nomex") ) {
//Smokey material, doesn't fuel well.
smoke += 3;
if( fuel->burnt <= cur->getFieldDensity() * 2 ||
(cur->getFieldDensity() == 3 && one_in(vol)) ) {
burn_amt = cur->getFieldDensity();
if( one_in( (ammo_type != NULL) ? vol : fuel->burnt ) ) {
time_added = 1;
}
}
}
if (!destroyed) {
if (ammo_type != NULL) {
burn_amt = std::min( burn_amt, (int)fuel->charges );
fuel->charges -= burn_amt;
consumed += burn_amt / base_burn_amt;
destroyed = fuel->charges <= 0;
} else {
destroyed = fuel->burn( burn_amt );
}
}
//lower age is a longer lasting fire
cur->setFieldAge(cur->getFieldAge() - time_added);
if( destroyed ) {
//If we decided the item was destroyed by fire, remove it.
new_content.insert( new_content.end(),
fuel->contents.begin(), fuel->contents.end() );
fuel = items_here.erase( fuel );
} else {
++fuel;
}
}
spawn_items( x, y, new_content );
veh = veh_at(x, y, part); //Get the part of the vehicle in the fire.
if (veh) {
veh->damage(part, cur->getFieldDensity() * 10, 2, false);
//Damage the vehicle in the fire.
}
// If the flames are in a brazier, they're fully contained,
// so skip consuming terrain
if((tr_brazier != tr_at(x, y)) &&
(has_flag("FIRE_CONTAINER", x, y) != true )) {
// Consume the terrain we're on
if (has_flag("FLAMMABLE", x, y) && one_in(32 - cur->getFieldDensity() * 10)) {
//The fire feeds on the ground itself until max density.
cur->setFieldAge(cur->getFieldAge() - cur->getFieldDensity() *
cur->getFieldDensity() * 40);
smoke += 15;
if (cur->getFieldDensity() == 3) {
destroy(x, y, true);
}
} else if (has_flag("FLAMMABLE_ASH", x, y) &&
one_in(32 - cur->getFieldDensity() * 10)) {
//The fire feeds on the ground itself until max density.
cur->setFieldAge(cur->getFieldAge() - cur->getFieldDensity() *
cur->getFieldDensity() * 40);
smoke += 15;
if (cur->getFieldDensity() == 3 || cur->getFieldAge() < -600) {
ter_set(x, y, t_dirt);
furn_set(x, y, f_ash);
}
} else if (has_flag("FLAMMABLE_HARD", x, y) &&
one_in(62 - cur->getFieldDensity() * 10)) {
//The fire feeds on the ground itself until max density.
cur->setFieldAge(cur->getFieldAge() - cur->getFieldDensity() *
cur->getFieldDensity() * 30);
smoke += 10;
if (cur->getFieldDensity() == 3 || cur->getFieldAge() < -600) {
destroy(x, y, true);
}
} else if (terlist[ter(x, y)].has_flag("SWIMMABLE")) {
cur->setFieldAge(cur->getFieldAge() + 800);
// Flames die quickly on water
}
}
// If the flames are in a pit, it can't spread to non-pit
bool in_pit = (ter(x, y) == t_pit);
// If the flames are REALLY big, they contribute to adjacent flames
if (cur->getFieldAge() < 0 && tr_brazier != tr_at(x, y) &&
(has_flag("FIRE_CONTAINER", x, y) != true ) ) {
if(cur->getFieldDensity() == 3) {
// Randomly offset our x/y shifts by 0-2, to randomly pick
// a square to spread to
int starti = rng(0, 2);
int startj = rng(0, 2);
tmpfld = NULL;
// Basically: Scan around for a spot,
// if there is more fire there, make it bigger and
// both flames renew in power
// This is how level 3 fires spend their excess age:
// making other fires bigger. Flashpoint.
for (int i = 0; i < 3 && cur->getFieldAge() < 0; i++) {
for (int j = 0; j < 3 && cur->getFieldAge() < 0; j++) {
int fx = x + ((i + starti) % 3) - 1;
int fy = y + ((j + startj) % 3) - 1;
tmpfld = get_field(fx, fy).findField(fd_fire);
if (tmpfld && tmpfld != cur && cur->getFieldAge() < 0 &&
tmpfld->getFieldDensity() < 3 &&
(in_pit == (ter(fx, fy) == t_pit))) {
tmpfld->setFieldDensity(tmpfld->getFieldDensity() + 1);
cur->setFieldAge(cur->getFieldAge() + 150);
}
}
}
} else {
// See if we can grow into a stage 2/3 fire, for this
// burning neighbours are necessary in addition to
// field age < 0, or alternatively, a LOT of fuel.
// The maximum fire density is 1 for a lone fire, 2 for at least 1 neighbour,
// 3 for at least 2 neighbours.
int maximum_density = 1;
// The following logic looks a bit complex due to optimization concerns, so here are the semantics:
// 1. Calculate maximum field density based on fuel, -500 is 2(raging), -1000 is 3(inferno)
// 2. Calculate maximum field density based on neighbours, 1 neighbours is 2(raging), 2 or more neighbours is 3(inferno)
// 3. Pick the higher maximum between 1. and 2.
// We don't just calculate both maximums and pick the higher because the adjacent field lookup is quite expensive and should be avoided if possible.
if(cur->getFieldAge() < -1500) {
maximum_density = 3;
} else {
int adjacent_fires = 0;
for (int i = 0; i < 3; i++) {
for (int j = 0; j < 3; j++) {
if( i == 1 && j == 1 ) {
continue;
}
const point pnt( x + (i % 3) - 1, y + (j % 3) - 1 );
if( get_field( pnt, fd_fire ) != nullptr ) {
adjacent_fires++;
}
}
}
maximum_density = 1 + (adjacent_fires >= 1) + (adjacent_fires >= 2);
if(maximum_density < 2 && cur->getFieldAge() < -500) {
maximum_density = 2;
}
}
// If we consumed a lot, the flames grow higher
while (cur->getFieldDensity() < maximum_density && cur->getFieldAge() < 0) {
//Fires under 0 age grow in size. Level 3 fires under 0 spread later on.
cur->setFieldAge(cur->getFieldAge() + 300);
cur->setFieldDensity(cur->getFieldDensity() + 1);
}
}
}
// Consume adjacent fuel / terrain / webs to spread.
// Randomly offset our x/y shifts by 0-2, to randomly pick a square to spread to
//Fires can only spread under 30 age. This is arbitrary but seems to work well.
//The reason is to differentiate a fire that spawned vs one created really.
//Fires spawned by fire in a new square START at 30 age, so if its a square with no fuel on it
//the fire won't keep crawling endlessly across the map.
int starti = rng(0, 2);
int startj = rng(0, 2);
for (int i = 0; i < 3; i++) {
for (int j = 0; j < 3; j++) {
int fx = x + ((i + starti) % 3) - 1, fy = y + ((j + startj) % 3) - 1;
if (INBOUNDS(fx, fy)) {
field &nearby_field = get_field(fx, fy);
field_entry *nearwebfld = nearby_field.findField(fd_web);
int spread_chance = 25 * (cur->getFieldDensity() - 1);
if (nearwebfld) {
spread_chance = 50 + spread_chance / 2;
}
if ((i != 0 || j != 0) && rng(1, 100) < spread_chance &&
cur->getFieldAge() < 200 && tr_brazier != tr_at(x, y) &&
(has_flag("FIRE_CONTAINER", x, y) != true ) &&
(in_pit == (ter(fx, fy) == t_pit)) &&
((cur->getFieldDensity() >= 2 && (has_flag("FLAMMABLE", fx, fy) && one_in(20))) ||
(cur->getFieldDensity() >= 2 && (has_flag("FLAMMABLE_ASH", fx, fy) && one_in(10))) ||
(cur->getFieldDensity() == 3 && (has_flag("FLAMMABLE_HARD", fx, fy) && one_in(10))) ||
flammable_items_at(fx, fy) || nearwebfld )) {
add_field(fx, fy, fd_fire, 1); //Nearby open flammable ground? Set it on fire.
tmpfld = nearby_field.findField(fd_fire);
if(tmpfld) {
tmpfld->setFieldAge(100);
cur->setFieldAge(cur->getFieldAge() + 50);
}
if(nearwebfld) {
if (fx == x && fy == y){
it = nearby_field.removeField(fd_web);
skipIterIncr = true;
} else {
nearby_field.removeField(fd_web);
}
}
} else {
bool nosmoke = true;
for (int ii = -1; ii <= 1; ii++) {
for (int jj = -1; jj <= 1; jj++) {
const point pnt( x + ii, y + jj );
const field_entry *fire = get_field( pnt, fd_fire );
const field_entry *smoke = get_field( pnt, fd_smoke );
if( fire != nullptr && ( fire->getFieldDensity() == 3 ||
( fire->getFieldDensity() == 2 && one_in(4) ) ) ) {
smoke++; //The higher this gets, the more likely for smoke.
} else if( smoke != nullptr ) {
nosmoke = false; //slightly, slightly, less likely to make smoke if there is already smoke
}
}
}
// If we're not spreading, maybe we'll stick out some smoke, huh?
if(!(is_outside(fx, fy))) {
//Lets make more smoke indoors since it doesn't dissipate
smoke += 10; //10 is just a magic number. To much smoke indoors? Lower it. To little, raise it.
}
if (move_cost(fx, fy) > 0 &&
(rng(0, 100) <= smoke || (nosmoke && one_in(40))) &&
rng(3, 35) < cur->getFieldDensity() * 5 && cur->getFieldAge() < 1000 &&
(has_flag("SUPPRESS_SMOKE", x, y) != true )) {
smoke--;
add_field(fx, fy, fd_smoke, rng(1, cur->getFieldDensity())); //Add smoke!
}
}
}
}
}
create_hot_air( x, y, cur->getFieldDensity());
}
break;
case fd_smoke:
spread_gas( cur, x, y, curtype, 80, 50 );
break;
case fd_tear_gas:
spread_gas( cur, x, y, curtype, 33, 30 );
break;
case fd_relax_gas:
spread_gas( cur, x, y, curtype, 25, 50 );
break;
case fd_fungal_haze:
spread_gas( cur, x, y, curtype, 33, 5);
int mondex;
mondex = g->mon_at(x, y);
if (move_cost(x, y) > 0) {
if (mondex != -1) { // Haze'd!
if (!g->zombie(mondex).type->in_species("FUNGUS") &&
!g->zombie(mondex).type->has_flag("NO_BREATHE")) {
if (g->u_see(x, y)) {
add_msg(m_info, _("The %s inhales thousands of live spores!"),
g->zombie(mondex).name().c_str());
}
monster &critter = g->zombie( mondex );
if( !critter.make_fungus() ) {
critter.die(nullptr);
}
}
} if (one_in(5 - cur->getFieldDensity())) {
g->spread_fungus(x, y); //Haze'd terrain
}
}
break;
case fd_toxic_gas:
spread_gas( cur, x, y, curtype, 50, 30 );
break;
case fd_cigsmoke:
spread_gas( cur, x, y, curtype, 250, 65 );
break;
case fd_weedsmoke: {
spread_gas( cur, x, y, curtype, 200, 60 );
if(one_in(20)) {