/**
* Calculates the Field Of View for the provided map from the given x, y
* coordinates. Returns a lightmap for a result where the values represent a
* percentage of fully lit.
*
* A value equal to or below 0 means that cell is not in the
* field of view, whereas a value equal to or above 1 means that cell is
* in the field of view.
*
* @param startx the horizontal component of the starting location
* @param starty the vertical component of the starting location
* @param radius the maximum distance to draw the FOV
*/
void map::build_seen_cache(const tripoint &origin)
{
memset(seen_cache, false, sizeof(seen_cache));
seen_cache[origin.x][origin.y] = true;
castLight<0, 1, 1, 0>( seen_cache, transparency_cache, origin.x, origin.y, 0 );
castLight<1, 0, 0, 1>( seen_cache, transparency_cache, origin.x, origin.y, 0 );
castLight<0, -1, 1, 0>( seen_cache, transparency_cache, origin.x, origin.y, 0 );
castLight<-1, 0, 0, 1>( seen_cache, transparency_cache, origin.x, origin.y, 0 );
castLight<0, 1, -1, 0>( seen_cache, transparency_cache, origin.x, origin.y, 0 );
castLight<1, 0, 0, -1>( seen_cache, transparency_cache, origin.x, origin.y, 0 );
castLight<0, -1, -1, 0>( seen_cache, transparency_cache, origin.x, origin.y, 0 );
castLight<-1, 0, 0, -1>( seen_cache, transparency_cache, origin.x, origin.y, 0 );
int part;
if ( vehicle *veh = veh_at( origin.x, origin.y, part ) ) {
// We're inside a vehicle. Do mirror calcs.
std::vector<int> mirrors = veh->all_parts_with_feature(VPFLAG_EXTENDS_VISION, true);
// Do all the sight checks first to prevent fake multiple reflection
// from happening due to mirrors becoming visible due to processing order.
// Cameras are also handled here, so that we only need to get through all veh parts once
int cam_control = -1;
for (std::vector<int>::iterator m_it = mirrors.begin(); m_it != mirrors.end(); /* noop */) {
const auto mirror_pos = veh->global_pos() + veh->parts[*m_it].precalc[0];
// We can utilize the current state of the seen cache to determine
// if the player can see the mirror from their position.
if( !veh->part_info( *m_it ).has_flag( "CAMERA" ) && !g->u.sees( mirror_pos )) {
m_it = mirrors.erase(m_it);
} else if( !veh->part_info( *m_it ).has_flag( "CAMERA_CONTROL" ) ) {
++m_it;
} else {
if( origin.x == mirror_pos.x && origin.y == mirror_pos.y && veh->camera_on ) {
cam_control = *m_it;
}
m_it = mirrors.erase( m_it );
}
}
for( size_t i = 0; i < mirrors.size(); i++ ) {
const int &mirror = mirrors[i];
bool is_camera = veh->part_info( mirror ).has_flag( "CAMERA" );
if( is_camera && cam_control < 0 ) {
continue; // Player not at camera control, so cameras don't work
}
const auto mirror_pos = veh->global_pos() + veh->parts[mirror].precalc[0];
// Determine how far the light has already traveled so mirrors
// don't cheat the light distance falloff.
int offsetDistance;
if( !is_camera ) {
offsetDistance = rl_dist(origin.x, origin.y, mirror_pos.x, mirror_pos.y);
} else {
offsetDistance = 60 - veh->part_info( mirror ).bonus *
veh->parts[mirror].hp / veh->part_info( mirror ).durability;
seen_cache[mirror_pos.x][mirror_pos.y] = true;
}
// @todo: Factor in the mirror facing and only cast in the
// directions the player's line of sight reflects to.
//
// The naive solution of making the mirrors act like a second player
// at an offset appears to give reasonable results though.
castLight<0, 1, 1, 0>( seen_cache, transparency_cache,
mirror_pos.x, mirror_pos.y, offsetDistance );
castLight<1, 0, 0, 1>( seen_cache, transparency_cache,
mirror_pos.x, mirror_pos.y, offsetDistance );
castLight<0, -1, 1, 0>( seen_cache, transparency_cache,
mirror_pos.x, mirror_pos.y, offsetDistance );
castLight<-1, 0, 0, 1>( seen_cache, transparency_cache,
mirror_pos.x, mirror_pos.y, offsetDistance );
castLight<0, 1, -1, 0>( seen_cache, transparency_cache,
mirror_pos.x, mirror_pos.y, offsetDistance );
castLight<1, 0, 0, -1>( seen_cache, transparency_cache,
mirror_pos.x, mirror_pos.y, offsetDistance );
castLight<0, -1, -1, 0>( seen_cache, transparency_cache,
mirror_pos.x, mirror_pos.y, offsetDistance );
castLight<-1, 0, 0, -1>( seen_cache, transparency_cache,
mirror_pos.x, mirror_pos.y, offsetDistance );
}
}
}
/**
* Calculates the Field Of View for the provided map from the given x, y
* coordinates. Returns a lightmap for a result where the values represent a
* percentage of fully lit.
*
* A value equal to or below 0 means that cell is not in the
* field of view, whereas a value equal to or above 1 means that cell is
* in the field of view.
*
* @param startx the horizontal component of the starting location
* @param starty the vertical component of the starting location
* @param radius the maximum distance to draw the FOV
*/
void map::build_seen_cache()
{
memset(seen_cache, false, sizeof(seen_cache));
seen_cache[g->u.posx][g->u.posy] = true;
const int offsetX = g->u.posx;
const int offsetY = g->u.posy;
castLight( 1, 1.0f, 0.0f, 0, 1, 1, 0, offsetX, offsetY, 0 );
castLight( 1, 1.0f, 0.0f, 1, 0, 0, 1, offsetX, offsetY, 0 );
castLight( 1, 1.0f, 0.0f, 0, -1, 1, 0, offsetX, offsetY, 0 );
castLight( 1, 1.0f, 0.0f, -1, 0, 0, 1, offsetX, offsetY, 0 );
castLight( 1, 1.0f, 0.0f, 0, 1, -1, 0, offsetX, offsetY, 0 );
castLight( 1, 1.0f, 0.0f, 1, 0, 0, -1, offsetX, offsetY, 0 );
castLight( 1, 1.0f, 0.0f, 0, -1, -1, 0, offsetX, offsetY, 0 );
castLight( 1, 1.0f, 0.0f, -1, 0, 0, -1, offsetX, offsetY, 0 );
if (vehicle *veh = veh_at(offsetX, offsetY)) {
// We're inside a vehicle. Do mirror calcs.
std::vector<int> mirrors = veh->all_parts_with_feature(VPFLAG_MIRROR, true);
// Do all the sight checks first to prevent fake multiple reflection
// from happening due to mirrors becoming visible due to processing order.
for (std::vector<int>::iterator m_it = mirrors.begin(); m_it != mirrors.end(); /* noop */) {
const int mirrorX = veh->global_x() + veh->parts[*m_it].precalc_dx[0];
const int mirrorY = veh->global_y() + veh->parts[*m_it].precalc_dy[0];
// We can utilize the current state of the seen cache to determine
// if the player can see the mirror from their position.
if (!g->u.sees(mirrorX, mirrorY)) {
m_it = mirrors.erase(m_it);
} else {
++m_it;
}
}
for (std::vector<int>::iterator m_it = mirrors.begin(); m_it != mirrors.end(); ++m_it) {
const int mirrorX = veh->global_x() + veh->parts[*m_it].precalc_dx[0];
const int mirrorY = veh->global_y() + veh->parts[*m_it].precalc_dy[0];
// Determine how far the light has already traveled so mirrors
// don't cheat the light distance falloff.
int offsetDistance = rl_dist(offsetX, offsetY, mirrorX, mirrorY);
// @todo: Factor in the mirror facing and only cast in the
// directions the player's line of sight reflects to.
//
// The naive solution of making the mirrors act like a second player
// at an offset appears to give reasonable results though.
castLight( 1, 1.0f, 0.0f, 0, 1, 1, 0, mirrorX, mirrorY, offsetDistance );
castLight( 1, 1.0f, 0.0f, 1, 0, 0, 1, mirrorX, mirrorY, offsetDistance );
castLight( 1, 1.0f, 0.0f, 0, -1, 1, 0, mirrorX, mirrorY, offsetDistance );
castLight( 1, 1.0f, 0.0f, -1, 0, 0, 1, mirrorX, mirrorY, offsetDistance );
castLight( 1, 1.0f, 0.0f, 0, 1, -1, 0, mirrorX, mirrorY, offsetDistance );
castLight( 1, 1.0f, 0.0f, 1, 0, 0, -1, mirrorX, mirrorY, offsetDistance );
castLight( 1, 1.0f, 0.0f, 0, -1, -1, 0, mirrorX, mirrorY, offsetDistance );
castLight( 1, 1.0f, 0.0f, -1, 0, 0, -1, mirrorX, mirrorY, offsetDistance );
}
}
}
bool map::process_fields_in_submap(game *g, int gridn)
{
bool found_field = false;
field *cur;
field_id curtype;
for (int locx = 0; locx < SEEX; locx++) {
for (int locy = 0; locy < SEEY; locy++) {
cur = &(grid[gridn].fld[locx][locy]);
int x = locx + SEEX * (gridn % my_MAPSIZE),
y = locy + SEEY * int(gridn / my_MAPSIZE);
curtype = cur->type;
if (!found_field && curtype != fd_null)
found_field = true;
if (cur->density > 3 || cur->density < 1)
debugmsg("Whoooooa density of %d", cur->density);
if (cur->age == 0) // Don't process "newborn" fields
curtype = fd_null;
int part;
vehicle *veh;
switch (curtype) {
case fd_null:
break; // Do nothing, obviously. OBVIOUSLY.
case fd_blood:
case fd_bile:
if (has_flag(swimmable, x, y)) // Dissipate faster in water
cur->age += 250;
break;
case fd_acid:
if (has_flag(swimmable, x, y)) // Dissipate faster in water
cur->age += 20;
for (int i = 0; i < i_at(x, y).size(); i++) {
item *melting = &(i_at(x, y)[i]);
if (melting->made_of(LIQUID) || melting->made_of(VEGGY) ||
melting->made_of(FLESH) || melting->made_of(POWDER) ||
melting->made_of(COTTON) || melting->made_of(WOOL) ||
melting->made_of(PAPER) || melting->made_of(PLASTIC) ||
(melting->made_of(GLASS) && !one_in(3)) || one_in(4)) {
// Acid destructable objects here
melting->damage++;
if (melting->damage >= 5 ||
(melting->made_of(PAPER) && melting->damage >= 3)) {
cur->age += melting->volume();
for (int m = 0; m < i_at(x, y)[i].contents.size(); m++)
i_at(x, y).push_back( i_at(x, y)[i].contents[m] );
i_at(x, y).erase(i_at(x, y).begin() + i);
i--;
}
}
}
break;
case fd_sap:
break; // It doesn't do anything.
case fd_fire: {
// Consume items as fuel to help us grow/last longer.
bool destroyed = false;
int vol = 0, smoke = 0, consumed = 0;
for (int i = 0; i < i_at(x, y).size() && consumed < cur->density * 2; i++) {
destroyed = false;
vol = i_at(x, y)[i].volume();
item *it = &(i_at(x, y)[i]);
if (it->is_ammo() && it->ammo_type() != AT_BATT &&
it->ammo_type() != AT_NAIL && it->ammo_type() != AT_BB &&
it->ammo_type() != AT_BOLT && it->ammo_type() != AT_ARROW) {
cur->age /= 2;
cur->age -= 600;
destroyed = true;
smoke += 6;
consumed++;
} else if (it->made_of(PAPER)) {
destroyed = it->burn(cur->density * 3);
consumed++;
if (cur->density == 1)
cur->age -= vol * 10;
if (vol >= 4)
smoke++;
} else if ((it->made_of(WOOD) || it->made_of(VEGGY))) {
if (vol <= cur->density * 10 || cur->density == 3) {
cur->age -= 4;
destroyed = it->burn(cur->density);
smoke++;
consumed++;
} else if (it->burnt < cur->density) {
destroyed = it->burn(1);
smoke++;
}
} else if ((it->made_of(COTTON) || it->made_of(WOOL))) {
if (vol <= cur->density * 5 || cur->density == 3) {
cur->age--;
destroyed = it->burn(cur->density);
smoke++;
consumed++;
} else if (it->burnt < cur->density) {
destroyed = it->burn(1);
smoke++;
}
} else if (it->made_of(FLESH)) {
if (vol <= cur->density * 5 || (cur->density == 3 && one_in(vol / 20))) {
cur->age--;
destroyed = it->burn(cur->density);
smoke += 3;
consumed++;
} else if (it->burnt < cur->density * 5 || cur->density >= 2) {
destroyed = it->burn(1);
smoke++;
}
} else if (it->made_of(LIQUID)) {
switch (it->type->id) { // TODO: Make this be not a hack.
case itm_whiskey:
case itm_vodka:
case itm_rum:
case itm_tequila:
cur->age -= 300;
smoke += 6;
break;
default:
cur->age += rng(80 * vol, 300 * vol);
smoke++;
}
destroyed = true;
consumed++;
} else if (it->made_of(POWDER)) {
cur->age -= vol;
destroyed = true;
smoke += 2;
} else if (it->made_of(PLASTIC)) {
smoke += 3;
if (it->burnt <= cur->density * 2 || (cur->density == 3 && one_in(vol))) {
destroyed = it->burn(cur->density);
if (one_in(vol + it->burnt))
cur->age--;
}
}
if (destroyed) {
for (int m = 0; m < i_at(x, y)[i].contents.size(); m++)
i_at(x, y).push_back( i_at(x, y)[i].contents[m] );
i_at(x, y).erase(i_at(x, y).begin() + i);
i--;
}
}
veh = &(veh_at(x, y, part));
if (veh->type != veh_null && (veh->parts[part].flags & VHP_FUEL_TANK) && veh->fuel_type == AT_GAS)
{
if (cur->density > 1 && one_in (8) && veh->fuel > 0)
veh->explode (g, x, y);
}
// Consume the terrain we're on
if (has_flag(explodes, x, y)) {
ter(x, y) = ter_id(int(ter(x, y)) + 1);
cur->age = 0;
cur->density = 3;
g->explosion(x, y, 40, 0, true);
} else if (has_flag(inflammable, x, y) && one_in(32 - cur->density * 10)) {
cur->age -= cur->density * cur->density * 40;
smoke += 15;
if (cur->density == 3)
ter(x, y) = t_ash;
} else if (has_flag(flammable, x, y) && one_in(32 - cur->density * 10)) {
cur->age -= cur->density * cur->density * 40;
smoke += 15;
if (cur->density == 3)
ter(x, y) = t_rubble;
} else if (has_flag(meltable, x, y) && one_in(32 - cur->density * 10)) {
cur->age -= cur->density * cur->density * 40;
if (cur->density == 3)
ter(x, y) = t_b_metal;
} else if (terlist[ter(x, y)].flags & mfb(swimmable))
cur->age += 800; // Flames die quickly on water
// If we consumed a lot, the flames grow higher
while (cur->density < 3 && cur->age < 0) {
cur->age += 300;
cur->density++;
}
// 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->density == 3 && cur->age < 0) {
// 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);
for (int i = 0; i < 3 && cur->age < 0; i++) {
for (int j = 0; j < 3 && cur->age < 0; j++) {
int fx = x + ((i + starti) % 3) - 1, fy = y + ((j + startj) % 3) - 1;
if (field_at(fx, fy).type == fd_fire && field_at(fx, fy).density < 3 &&
(!in_pit || ter(fx, fy) == t_pit)) {
field_at(fx, fy).density++;
field_at(fx, fy).age = 0;
cur->age = 0;
}
}
}
}
// Consume adjacent fuel / terrain to spread.
// 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);
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)) {
int spread_chance = 20 * (cur->density - 1) + 10 * smoke;
if (has_flag(explodes, fx, fy) && one_in(8 - cur->density)) {
ter(fx, fy) = ter_id(int(ter(fx, fy)) + 1);
g->explosion(fx, fy, 40, 0, true);
} else if ((i != 0 || j != 0) && rng(1, 100) < spread_chance &&
(!in_pit || ter(fx, fy) == t_pit) &&
((cur->density == 3 &&
(has_flag(flammable, fx, fy) || one_in(20))) ||
flammable_items_at(fx, fy) ||
field_at(fx, fy).type == fd_web)) {
if (field_at(fx, fy).type == fd_smoke ||
field_at(fx, fy).type == fd_web)
field_at(fx, fy) = field(fd_fire, 1, 0);
else
add_field(g, fx, fy, fd_fire, 1);
} else {
bool nosmoke = true;
for (int ii = -1; ii <= 1; ii++) {
for (int jj = -1; jj <= 1; jj++) {
if (field_at(x+ii, y+jj).type == fd_fire &&
field_at(x+ii, y+jj).density == 3)
smoke++;
else if (field_at(x+ii, y+jj).type == fd_smoke)
nosmoke = false;
}
}
// If we're not spreading, maybe we'll stick out some smoke, huh?
if (move_cost(fx, fy) > 0 &&
(!one_in(smoke) || (nosmoke && one_in(40))) &&
rng(3, 35) < cur->density * 10 && cur->age < 1000) {
smoke--;
add_field(g, fx, fy, fd_smoke, rng(1, cur->density));
}
}
}
}
}
} break;
case fd_smoke:
for (int i = -1; i <= 1; i++) {
for (int j = -1; j <= 1; j++)
g->scent(x+i, y+j) = 0;
}
if (is_outside(x, y))
cur->age += 50;
if (one_in(2)) {
std::vector <point> spread;
for (int a = -1; a <= 1; a++) {
for (int b = -1; b <= 1; b++) {
if ((field_at(x+a, y+b).type == fd_smoke &&
field_at(x+a, y+b).density < 3 ) ||
(field_at(x+a, y+b).is_null() && move_cost(x+a, y+b) > 0))
spread.push_back(point(x+a, y+b));
}
}
if (cur->density > 0 && cur->age > 0 && spread.size() > 0) {
point p = spread[rng(0, spread.size() - 1)];
if (field_at(p.x, p.y).type == fd_smoke &&
field_at(p.x, p.y).density < 3) {
field_at(p.x, p.y).density++;
cur->density--;
} else if (cur->density > 0 && move_cost(p.x, p.y) > 0 &&
add_field(g, p.x, p.y, fd_smoke, 1)){
cur->density--;
field_at(p.x, p.y).age = cur->age;
}
}
}
break;
case fd_tear_gas:
// 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;
}
if (is_outside(x, y))
cur->age += 30;
// One in three chance that it spreads (less than smoke!)
if (one_in(3)) {
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++) {
if (((field_at(x+a, y+b).type == fd_smoke ||
field_at(x+a, y+b).type == fd_tear_gas) &&
field_at(x+a, y+b).density < 3 ) ||
(field_at(x+a, y+b).is_null() && move_cost(x+a, y+b) > 0))
spread.push_back(point(x+a, y+b));
}
}
// Then, spread to a nearby point
if (cur->density > 0 && cur->age > 0 && spread.size() > 0) {
point p = spread[rng(0, spread.size() - 1)];
// Nearby teargas grows thicker
if (field_at(p.x, p.y).type == fd_tear_gas &&
field_at(p.x, p.y).density < 3) {
field_at(p.x, p.y).density++;
cur->density--;
// Nearby smoke is converted into teargas
} else if (field_at(p.x, p.y).type == fd_smoke) {
field_at(p.x, p.y).type = fd_tear_gas;
// Or, just create a new field.
} else if (cur->density > 0 && move_cost(p.x, p.y) > 0 &&
add_field(g, p.x, p.y, fd_tear_gas, 1)) {
cur->density--;
field_at(p.x, p.y).age = cur->age;
}
}
}
break;
case fd_toxic_gas:
// 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;
}
if (is_outside(x, y))
cur->age += 40;
if (one_in(2)) {
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++) {
if (((field_at(x+a, y+b).type == fd_smoke ||
field_at(x+a, y+b).type == fd_tear_gas ||
field_at(x+a, y+b).type == fd_toxic_gas ||
field_at(x+a, y+b).type == fd_nuke_gas ) &&
field_at(x+a, y+b).density < 3 ) ||
(field_at(x+a, y+b).is_null() && move_cost(x+a, y+b) > 0))
spread.push_back(point(x+a, y+b));
}
}
// Then, spread to a nearby point
if (cur->density > 0 && cur->age > 0 && spread.size() > 0) {
point p = spread[rng(0, spread.size() - 1)];
// Nearby toxic gas grows thicker
if (field_at(p.x, p.y).type == fd_toxic_gas &&
field_at(p.x, p.y).density < 3) {
field_at(p.x, p.y).density++;
cur->density--;
// Nearby smoke & teargas is converted into toxic gas
} else if (field_at(p.x, p.y).type == fd_smoke ||
field_at(p.x, p.y).type == fd_tear_gas) {
field_at(p.x, p.y).type = fd_toxic_gas;
// Or, just create a new field.
} else if (cur->density > 0 && move_cost(p.x, p.y) > 0 &&
add_field(g, p.x, p.y, fd_toxic_gas, 1)) {
cur->density--;
field_at(p.x, p.y).age = cur->age;
}
}
}
break;
case fd_nuke_gas:
// 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;
}
if (is_outside(x, y))
cur->age += 40;
// Increase long-term radiation in the land underneath
radiation(x, y) += rng(0, cur->density);
if (one_in(2)) {
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++) {
if (((field_at(x+a, y+b).type == fd_smoke ||
field_at(x+a, y+b).type == fd_tear_gas ||
field_at(x+a, y+b).type == fd_toxic_gas ||
field_at(x+a, y+b).type == fd_nuke_gas ) &&
field_at(x+a, y+b).density < 3 ) ||
(field_at(x+a, y+b).is_null() && move_cost(x+a, y+b) > 0))
spread.push_back(point(x+a, y+b));
}
}
// Then, spread to a nearby point
if (cur->density > 0 && cur->age > 0 && spread.size() > 0) {
point p = spread[rng(0, spread.size() - 1)];
// Nearby nukegas grows thicker
if (field_at(p.x, p.y).type == fd_nuke_gas &&
field_at(p.x, p.y).density < 3) {
field_at(p.x, p.y).density++;
cur->density--;
// Nearby smoke, tear, and toxic gas is converted into nukegas
} else if (field_at(p.x, p.y).type == fd_smoke ||
field_at(p.x, p.y).type == fd_toxic_gas ||
field_at(p.x, p.y).type == fd_tear_gas) {
field_at(p.x, p.y).type = fd_nuke_gas;
// Or, just create a new field.
} else if (cur->density > 0 && move_cost(p.x, p.y) > 0 &&
add_field(g, p.x, p.y, fd_nuke_gas, 1)) {
cur->density--;
field_at(p.x, p.y).age = cur->age;
}
}
}
break;
case fd_gas_vent:
for (int i = x - 1; i <= x + 1; i++) {
for (int j = y - 1; j <= y + 1; j++) {
if (field_at(i, j).type == fd_toxic_gas && field_at(i, j).density < 3)
field_at(i, j).density++;
else
add_field(g, i, j, fd_toxic_gas, 3);
}
}
break;
case fd_fire_vent:
if (cur->density > 1) {
if (one_in(3))
cur->density--;
} else {
cur->type = fd_flame_burst;
cur->density = 3;
}
break;
case fd_flame_burst:
if (cur->density > 1)
cur->density--;
else {
cur->type = fd_fire_vent;
cur->density = 3;
}
break;
case fd_electricity:
if (!one_in(5)) { // 4 in 5 chance to spread
std::vector<point> valid;
if (move_cost(x, y) == 0 && cur->density > 1) { // We're grounded
int tries = 0;
while (tries < 10 && cur->age < 50) {
int cx = x + rng(-1, 1), cy = y + rng(-1, 1);
if (move_cost(cx, cy) != 0 && field_at(cx, cy).is_null()) {
add_field(g, cx, cy, fd_electricity, 1);
cur->density--;
tries = 0;
} else
tries++;
}
} else { // We're not grounded; attempt to ground
for (int a = -1; a <= 1; a++) {
for (int b = -1; b <= 1; b++) {
if (move_cost(x + a, y + b) == 0 && // Grounded tiles first
field_at(x + a, y + b).is_null())
valid.push_back(point(x + a, y + b));
}
}
if (valid.size() == 0) { // Spread to adjacent space, then
int px = x + rng(-1, 1), py = y + rng(-1, 1);
if (move_cost(px, py) > 0 && field_at(px, py).type == fd_electricity &&
field_at(px, py).density < 3)
field_at(px, py).density++;
else if (move_cost(px, py) > 0)
add_field(g, px, py, fd_electricity, 1);
cur->density--;
}
while (valid.size() > 0 && cur->density > 0) {
int index = rng(0, valid.size() - 1);
add_field(g, valid[index].x, valid[index].y, fd_electricity, 1);
cur->density--;
valid.erase(valid.begin() + index);
}
}
}
break;
case fd_fatigue:
if (cur->density < 3 && int(g->turn) % 3600 == 0 && one_in(10))
cur->density++;
else if (cur->density == 3 && one_in(600)) { // Spawn nether creature!
mon_id type = mon_id(rng(mon_flying_polyp, mon_blank));
monster creature(g->mtypes[type]);
creature.spawn(x + rng(-3, 3), y + rng(-3, 3));
g->z.push_back(creature);
}
break;
}
cur->age++;
if (fieldlist[cur->type].halflife > 0) {
if (cur->age > 0 &&
dice(3, cur->age) > dice(3, fieldlist[cur->type].halflife)) {
cur->age = 0;
cur->density--;
}
if (cur->density <= 0) { // Totally dissapated.
grid[gridn].field_count--;
grid[gridn].fld[locx][locy] = field();
}
}
}
}
return found_field;
}
/**
* Calculates the Field Of View for the provided map from the given x, y
* coordinates. Returns a lightmap for a result where the values represent a
* percentage of fully lit.
*
* A value equal to or below 0 means that cell is not in the
* field of view, whereas a value equal to or above 1 means that cell is
* in the field of view.
*
* @param startx the horizontal component of the starting location
* @param starty the vertical component of the starting location
* @param radius the maximum distance to draw the FOV
*/
void map::build_seen_cache( const tripoint &origin, const int target_z )
{
auto &map_cache = get_cache( target_z );
float (&transparency_cache)[MAPSIZE*SEEX][MAPSIZE*SEEY] = map_cache.transparency_cache;
float (&seen_cache)[MAPSIZE*SEEX][MAPSIZE*SEEY] = map_cache.seen_cache;
std::uninitialized_fill_n(
&seen_cache[0][0], MAPSIZE*SEEX * MAPSIZE*SEEY, LIGHT_TRANSPARENCY_SOLID);
if( !fov_3d ) {
seen_cache[origin.x][origin.y] = LIGHT_TRANSPARENCY_CLEAR;
castLight<0, 1, 1, 0, sight_calc, sight_check>(
seen_cache, transparency_cache, origin.x, origin.y, 0 );
castLight<1, 0, 0, 1, sight_calc, sight_check>(
seen_cache, transparency_cache, origin.x, origin.y, 0 );
castLight<0, -1, 1, 0, sight_calc, sight_check>(
seen_cache, transparency_cache, origin.x, origin.y, 0 );
castLight<-1, 0, 0, 1, sight_calc, sight_check>(
seen_cache, transparency_cache, origin.x, origin.y, 0 );
castLight<0, 1, -1, 0, sight_calc, sight_check>(
seen_cache, transparency_cache, origin.x, origin.y, 0 );
castLight<1, 0, 0, -1, sight_calc, sight_check>(
seen_cache, transparency_cache, origin.x, origin.y, 0 );
castLight<0, -1, -1, 0, sight_calc, sight_check>(
seen_cache, transparency_cache, origin.x, origin.y, 0 );
castLight<-1, 0, 0, -1, sight_calc, sight_check>(
seen_cache, transparency_cache, origin.x, origin.y, 0 );
} else {
if( origin.z == target_z ) {
seen_cache[origin.x][origin.y] = LIGHT_TRANSPARENCY_CLEAR;
}
// Cache the caches (pointers to them)
std::array<const float (*)[MAPSIZE*SEEX][MAPSIZE*SEEY], OVERMAP_LAYERS> transparency_caches;
std::array<float (*)[MAPSIZE*SEEX][MAPSIZE*SEEY], OVERMAP_LAYERS> seen_caches;
std::array<const bool (*)[MAPSIZE*SEEX][MAPSIZE*SEEY], OVERMAP_LAYERS> floor_caches;
for( int z = -OVERMAP_DEPTH; z <= OVERMAP_HEIGHT; z++ ) {
auto &cur_cache = get_cache( z );
transparency_caches[z + OVERMAP_DEPTH] = &cur_cache.transparency_cache;
seen_caches[z + OVERMAP_DEPTH] = &cur_cache.seen_cache;
floor_caches[z + OVERMAP_DEPTH] = &cur_cache.floor_cache;
}
// Down
cast_zlight<0, 1, 0, 1, 0, 0, -1, sight_calc, sight_check>(
seen_caches, transparency_caches, floor_caches, origin, 0 );
cast_zlight<1, 0, 0, 0, 1, 0, -1, sight_calc, sight_check>(
seen_caches, transparency_caches, floor_caches, origin, 0 );
cast_zlight<0, -1, 0, 1, 0, 0, -1, sight_calc, sight_check>(
seen_caches, transparency_caches, floor_caches, origin, 0 );
cast_zlight<-1, 0, 0, 0, 1, 0, -1, sight_calc, sight_check>(
seen_caches, transparency_caches, floor_caches, origin, 0 );
cast_zlight<0, 1, 0, -1, 0, 0, -1, sight_calc, sight_check>(
seen_caches, transparency_caches, floor_caches, origin, 0 );
cast_zlight<1, 0, 0, 0, -1, 0, -1, sight_calc, sight_check>(
seen_caches, transparency_caches, floor_caches, origin, 0 );
cast_zlight<0, -1, 0, -1, 0, 0, -1, sight_calc, sight_check>(
seen_caches, transparency_caches, floor_caches, origin, 0 );
cast_zlight<-1, 0, 0, 0, -1, 0, -1, sight_calc, sight_check>(
seen_caches, transparency_caches, floor_caches, origin, 0 );
cast_zlight<0, 1, 0, 1, 0, 0, 1, sight_calc, sight_check>(
seen_caches, transparency_caches, floor_caches, origin, 0 );
cast_zlight<1, 0, 0, 0, 1, 0, 1, sight_calc, sight_check>(
seen_caches, transparency_caches, floor_caches, origin, 0 );
// Up
cast_zlight<0, -1, 0, 1, 0, 0, 1, sight_calc, sight_check>(
seen_caches, transparency_caches, floor_caches, origin, 0 );
cast_zlight<-1, 0, 0, 0, 1, 0, 1, sight_calc, sight_check>(
seen_caches, transparency_caches, floor_caches, origin, 0 );
cast_zlight<0, 1, 0, -1, 0, 0, 1, sight_calc, sight_check>(
seen_caches, transparency_caches, floor_caches, origin, 0 );
cast_zlight<1, 0, 0, 0, -1, 0, 1, sight_calc, sight_check>(
seen_caches, transparency_caches, floor_caches, origin, 0 );
cast_zlight<0, -1, 0, -1, 0, 0, 1, sight_calc, sight_check>(
seen_caches, transparency_caches, floor_caches, origin, 0 );
cast_zlight<-1, 0, 0, 0, -1, 0, 1, sight_calc, sight_check>(
seen_caches, transparency_caches, floor_caches, origin, 0 );
}
int part;
vehicle *veh = veh_at( origin, part );
if( veh == nullptr ) {
return;
}
// We're inside a vehicle. Do mirror calcs.
std::vector<int> mirrors = veh->all_parts_with_feature(VPFLAG_EXTENDS_VISION, true);
// Do all the sight checks first to prevent fake multiple reflection
// from happening due to mirrors becoming visible due to processing order.
// Cameras are also handled here, so that we only need to get through all veh parts once
int cam_control = -1;
for (std::vector<int>::iterator m_it = mirrors.begin(); m_it != mirrors.end(); /* noop */) {
const auto mirror_pos = veh->global_pos() + veh->parts[*m_it].precalc[0];
// We can utilize the current state of the seen cache to determine
// if the player can see the mirror from their position.
if( !veh->part_info( *m_it ).has_flag( "CAMERA" ) &&
seen_cache[mirror_pos.x][mirror_pos.y] < LIGHT_TRANSPARENCY_SOLID + 0.1 ) {
m_it = mirrors.erase(m_it);
} else if( !veh->part_info( *m_it ).has_flag( "CAMERA_CONTROL" ) ) {
++m_it;
} else {
if( origin.x == mirror_pos.x && origin.y == mirror_pos.y && veh->camera_on ) {
cam_control = *m_it;
}
m_it = mirrors.erase( m_it );
}
}
for( size_t i = 0; i < mirrors.size(); i++ ) {
const int &mirror = mirrors[i];
bool is_camera = veh->part_info( mirror ).has_flag( "CAMERA" );
if( is_camera && cam_control < 0 ) {
continue; // Player not at camera control, so cameras don't work
}
const auto mirror_pos = veh->global_pos() + veh->parts[mirror].precalc[0];
// Determine how far the light has already traveled so mirrors
// don't cheat the light distance falloff.
int offsetDistance;
if( !is_camera ) {
offsetDistance = rl_dist(origin.x, origin.y, mirror_pos.x, mirror_pos.y);
} else {
offsetDistance = 60 - veh->part_info( mirror ).bonus *
veh->parts[mirror].hp / veh->part_info( mirror ).durability;
seen_cache[mirror_pos.x][mirror_pos.y] = LIGHT_TRANSPARENCY_OPEN_AIR;
}
// @todo: Factor in the mirror facing and only cast in the
// directions the player's line of sight reflects to.
//
// The naive solution of making the mirrors act like a second player
// at an offset appears to give reasonable results though.
castLight<0, 1, 1, 0, sight_calc, sight_check>(
seen_cache, transparency_cache, mirror_pos.x, mirror_pos.y, offsetDistance );
castLight<1, 0, 0, 1, sight_calc, sight_check>(
seen_cache, transparency_cache, mirror_pos.x, mirror_pos.y, offsetDistance );
castLight<0, -1, 1, 0, sight_calc, sight_check>(
seen_cache, transparency_cache, mirror_pos.x, mirror_pos.y, offsetDistance );
castLight<-1, 0, 0, 1, sight_calc, sight_check>(
seen_cache, transparency_cache, mirror_pos.x, mirror_pos.y, offsetDistance );
castLight<0, 1, -1, 0, sight_calc, sight_check>(
seen_cache, transparency_cache, mirror_pos.x, mirror_pos.y, offsetDistance );
castLight<1, 0, 0, -1, sight_calc, sight_check>(
seen_cache, transparency_cache, mirror_pos.x, mirror_pos.y, offsetDistance );
castLight<0, -1, -1, 0, sight_calc, sight_check>(
seen_cache, transparency_cache, mirror_pos.x, mirror_pos.y, offsetDistance );
castLight<-1, 0, 0, -1, sight_calc, sight_check>(
seen_cache, transparency_cache, mirror_pos.x, mirror_pos.y, offsetDistance );
}
}