void map::apply_light_arc(int x, int y, int angle, float luminance, int wideangle )
{
if (luminance <= LIGHT_SOURCE_LOCAL) {
return;
}
static bool lit[LIGHTMAP_CACHE_X][LIGHTMAP_CACHE_Y];
memset(lit, 0, sizeof(lit));
#define lum_mult 3.0
luminance = luminance * lum_mult;
int range = LIGHT_RANGE(luminance);
apply_light_source(x, y, LIGHT_SOURCE_LOCAL, trigdist);
// Normalise (should work with negative values too)
const double PI = 3.14159265358979f;
const double HALFPI = 1.570796326794895f;
const double wangle = wideangle / 2.0;
int nangle = angle % 360;
int endx, endy;
double rad = PI * (double)nangle / 180;
calc_ray_end(nangle, range, x, y, &endx, &endy);
apply_light_ray(lit, x, y, endx, endy , luminance, trigdist);
int testx, testy;
calc_ray_end(wangle + nangle, range, x, y, &testx, &testy);
double wdist = sqrt(double((endx - testx) * (endx - testx) + (endy - testy) * (endy - testy)));
if(wdist > 0.5) {
double wstep = ( wangle / ( wdist *
1.42 ) ); // attempt to determine beam density required to cover all squares
for (double ao = wstep; ao <= wangle; ao += wstep) {
if ( trigdist ) {
double fdist = (ao * HALFPI) / wangle;
double orad = ( PI * ao / 180.0 );
endx = int( x + ( (double)range - fdist * 2.0) * cos(rad + orad) );
endy = int( y + ( (double)range - fdist * 2.0) * sin(rad + orad) );
apply_light_ray(lit, x, y, endx, endy , luminance, true);
endx = int( x + ( (double)range - fdist * 2.0) * cos(rad - orad) );
endy = int( y + ( (double)range - fdist * 2.0) * sin(rad - orad) );
apply_light_ray(lit, x, y, endx, endy , luminance, true);
} else {
calc_ray_end(nangle + ao, range, x, y, &endx, &endy);
apply_light_ray(lit, x, y, endx, endy , luminance, false);
calc_ray_end(nangle - ao, range, x, y, &endx, &endy);
apply_light_ray(lit, x, y, endx, endy , luminance, false);
}
}
}
}
void map::apply_light_arc(int x, int y, int angle, float luminance, int wideangle )
{
if (luminance <= LIGHT_SOURCE_LOCAL) {
return;
}
bool lit[LIGHTMAP_CACHE_X][LIGHTMAP_CACHE_Y] {};
constexpr float lum_mult = 3.0f;
luminance = luminance * lum_mult;
int range = LIGHT_RANGE(luminance);
apply_light_source(x, y, LIGHT_SOURCE_LOCAL, trigdist);
// Normalise (should work with negative values too)
const double wangle = wideangle / 2.0;
int nangle = angle % 360;
int endx, endy;
double rad = PI * (double)nangle / 180;
calc_ray_end(nangle, range, x, y, &endx, &endy);
apply_light_ray(lit, x, y, endx, endy , luminance, trigdist);
int testx, testy;
calc_ray_end(wangle + nangle, range, x, y, &testx, &testy);
const float wdist = hypot(endx - testx, endy - testy);
if (wdist <= 0.5) {
return;
}
// attempt to determine beam density required to cover all squares
const double wstep = ( wangle / ( wdist * SQRT_2 ) );
for (double ao = wstep; ao <= wangle; ao += wstep) {
if ( trigdist ) {
double fdist = (ao * HALFPI) / wangle;
double orad = ( PI * ao / 180.0 );
endx = int( x + ( (double)range - fdist * 2.0) * cos(rad + orad) );
endy = int( y + ( (double)range - fdist * 2.0) * sin(rad + orad) );
apply_light_ray(lit, x, y, endx, endy , luminance, true);
endx = int( x + ( (double)range - fdist * 2.0) * cos(rad - orad) );
endy = int( y + ( (double)range - fdist * 2.0) * sin(rad - orad) );
apply_light_ray(lit, x, y, endx, endy , luminance, true);
} else {
calc_ray_end(nangle + ao, range, x, y, &endx, &endy);
apply_light_ray(lit, x, y, endx, endy , luminance, false);
calc_ray_end(nangle - ao, range, x, y, &endx, &endy);
apply_light_ray(lit, x, y, endx, endy , luminance, false);
}
}
}
void map::apply_light_source(int x, int y, float luminance, bool trig_brightcalc )
{
bool lit[LIGHTMAP_CACHE_X][LIGHTMAP_CACHE_Y];
memset(lit, 0, sizeof(lit));
if (INBOUNDS(x, y)) {
lit[x][y] = true;
lm[x][y] += std::max(luminance, static_cast<float>(LL_LOW));
sm[x][y] += luminance;
}
if ( luminance <= 1 ) {
return;
} else if ( luminance <=2 ) {
luminance = 1.49f;
}
/* If we're a 5 luminance fire , we skip casting rays into ey && sx if we have
neighboring fires to the north and west that were applied via light_source_buffer
If there's a 1 luminance candle east in buffer, we still cast rays into ex since it's smaller
If there's a 100 luminance magnesium flare south added via apply_light_source instead od
add_light_source, it's unbuffered so we'll still cast rays into sy.
ey
nnnNnnn
w e
w 5 +e
sx W 5*1+E ex
w ++++e
w+++++e
sssSsss
sy
*/
const int peer_inbounds = LIGHTMAP_CACHE_X-1;
bool north=(y != 0 && light_source_buffer[x][y-1] < luminance );
bool south=(y != peer_inbounds && light_source_buffer[x][y+1] < luminance );
bool east=(x != peer_inbounds && light_source_buffer[x+1][y] < luminance );
bool west=(x != 0 && light_source_buffer[x-1][y] < luminance );
if (luminance > LIGHT_SOURCE_LOCAL) {
int range = LIGHT_RANGE(luminance);
int sx = x - range; int ex = x + range;
int sy = y - range; int ey = y + range;
for(int off = sx; off <= ex; ++off) {
if ( south ) apply_light_ray(lit, x, y, off, sy, luminance, trig_brightcalc);
if ( north ) apply_light_ray(lit, x, y, off, ey, luminance, trig_brightcalc);
}
// Skip corners with + 1 and < as they were done
for(int off = sy + 1; off < ey; ++off) {
if ( west ) apply_light_ray(lit, x, y, sx, off, luminance, trig_brightcalc);
if ( east ) apply_light_ray(lit, x, y, ex, off, luminance, trig_brightcalc);
}
}
}
void map::apply_light_arc( const tripoint &p, int angle, float luminance, int wideangle )
{
if (luminance <= LIGHT_SOURCE_LOCAL) {
return;
}
bool lit[LIGHTMAP_CACHE_X][LIGHTMAP_CACHE_Y] {};
apply_light_source( p, LIGHT_SOURCE_LOCAL );
// Normalise (should work with negative values too)
const double wangle = wideangle / 2.0;
int nangle = angle % 360;
tripoint end;
double rad = PI * (double)nangle / 180;
int range = LIGHT_RANGE(luminance);
calc_ray_end( nangle, range, p, end );
apply_light_ray(lit, p, end , luminance);
tripoint test;
calc_ray_end(wangle + nangle, range, p, test );
const float wdist = hypot( end.x - test.x, end.y - test.y );
if (wdist <= 0.5) {
return;
}
// attempt to determine beam density required to cover all squares
const double wstep = ( wangle / ( wdist * SQRT_2 ) );
for( double ao = wstep; ao <= wangle; ao += wstep ) {
if( trigdist ) {
double fdist = (ao * HALFPI) / wangle;
double orad = ( PI * ao / 180.0 );
end.x = int( p.x + ( (double)range - fdist * 2.0) * cos(rad + orad) );
end.y = int( p.y + ( (double)range - fdist * 2.0) * sin(rad + orad) );
apply_light_ray( lit, p, end, luminance );
end.x = int( p.x + ( (double)range - fdist * 2.0) * cos(rad - orad) );
end.y = int( p.y + ( (double)range - fdist * 2.0) * sin(rad - orad) );
apply_light_ray( lit, p, end, luminance );
} else {
calc_ray_end( nangle + ao, range, p, end );
apply_light_ray( lit, p, end, luminance );
calc_ray_end( nangle - ao, range, p, end );
apply_light_ray( lit, p, end, luminance );
}
}
}