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#include "engine.h"
VARP(maxdynlights, 0, min(3, MAXDYNLIGHTS), MAXDYNLIGHTS);
VARP(dynlightdist, 0, 1024, 10000);
struct dynlight
{
vec o, hud;
float radius, initradius, curradius, dist;
vec color, initcolor, curcolor;
int fade, peak, expire, flags;
physent *owner;
void calcradius()
{
if(fade + peak > 0)
{
int remaining = expire - lastmillis;
if(flags&DL_EXPAND)
curradius = initradius + (radius - initradius) * (1.0f - remaining/float(fade + peak));
else if(!(flags&DL_FLASH) && remaining > fade)
curradius = initradius + (radius - initradius) * (1.0f - float(remaining - fade)/peak);
else if(flags&DL_SHRINK)
curradius = (radius*remaining)/fade;
else curradius = radius;
}
else curradius = radius;
}
void calccolor()
{
if(flags&DL_FLASH || peak <= 0) curcolor = color;
else
{
int peaking = expire - lastmillis - fade;
if(peaking <= 0) curcolor = color;
else curcolor.lerp(initcolor, color, 1.0f - float(peaking)/peak);
}
float intensity = 1.0f;
if(fade > 0)
{
int fading = expire - lastmillis;
if(fading < fade) intensity = float(fading)/fade;
}
curcolor.mul(intensity);
// KLUGE: this prevents nvidia drivers from trying to recompile dynlight fragment programs
loopk(3) if(fmod(curcolor[k], 1.0f/256) < 0.001f) curcolor[k] += 0.001f;
}
};
vector<dynlight> dynlights;
vector<dynlight *> closedynlights;
void adddynlight(const vec &o, float radius, const vec &color, int fade, int peak, int flags, float initradius, const vec &initcolor, physent *owner)
{
if(!maxdynlights) return;
if(o.dist(camera1->o) > dynlightdist || radius <= 0) return;
int insert = 0, expire = fade + peak + lastmillis;
loopvrev(dynlights) if(expire>=dynlights[i].expire) { insert = i+1; break; }
dynlight d;
d.o = d.hud = o;
d.radius = radius;
d.initradius = initradius;
d.color = color;
d.initcolor = initcolor;
d.fade = fade;
d.peak = peak;
d.expire = expire;
d.flags = flags;
d.owner = owner;
dynlights.insert(insert, d);
}
void cleardynlights()
{
int faded = -1;
loopv(dynlights) if(lastmillis<dynlights[i].expire) { faded = i; break; }
if(faded<0) dynlights.setsize(0);
else if(faded>0) dynlights.remove(0, faded);
}
void removetrackeddynlights(physent *owner)
{
loopvrev(dynlights) if(owner ? dynlights[i].owner == owner : dynlights[i].owner != NULL) dynlights.remove(i);
}
void updatedynlights()
{
cleardynlights();
game::adddynlights();
loopv(dynlights)
{
dynlight &d = dynlights[i];
if(d.owner) game::dynlighttrack(d.owner, d.o, d.hud);
d.calcradius();
d.calccolor();
}
}
int finddynlights()
{
closedynlights.setsize(0);
if(!maxdynlights) return 0;
physent e;
e.type = ENT_CAMERA;
loopvj(dynlights)
{
dynlight &d = dynlights[j];
if(d.curradius <= 0) continue;
d.dist = camera1->o.dist(d.o) - d.curradius;
if(d.dist > dynlightdist || isfoggedsphere(d.curradius, d.o) || pvsoccludedsphere(d.o, d.curradius))
continue;
if(reflecting || refracting > 0)
{
if(d.o.z + d.curradius < reflectz) continue;
}
else if(refracting < 0 && d.o.z - d.curradius > reflectz) continue;
e.o = d.o;
e.radius = e.xradius = e.yradius = e.eyeheight = e.aboveeye = d.curradius;
if(!collide(&e, vec(0, 0, 0), 0, false)) continue;
int insert = 0;
loopvrev(closedynlights) if(d.dist >= closedynlights[i]->dist) { insert = i+1; break; }
closedynlights.insert(insert, &d);
if(closedynlights.length() >= DYNLIGHTMASK) break;
}
return closedynlights.length();
}
bool getdynlight(int n, vec &o, float &radius, vec &color)
{
if(!closedynlights.inrange(n)) return false;
dynlight &d = *closedynlights[n];
o = d.o;
radius = d.curradius;
color = d.curcolor;
return true;
}
void dynlightreaching(const vec &target, vec &color, vec &dir, bool hud)
{
vec dyncolor(0, 0, 0);//, dyndir(0, 0, 0);
loopv(dynlights)
{
dynlight &d = dynlights[i];
if(d.curradius<=0) continue;
vec ray(hud ? d.hud : d.o);
ray.sub(target);
float mag = ray.squaredlen();
if(mag >= d.curradius*d.curradius) continue;
vec color = d.curcolor;
color.mul(1 - sqrtf(mag)/d.curradius);
dyncolor.add(color);
//dyndir.add(ray.mul(intensity/mag));
}
#if 0
if(!dyndir.iszero())
{
dyndir.normalize();
float x = dyncolor.magnitude(), y = color.magnitude();
if(x+y>0)
{
dir.mul(x);
dyndir.mul(y);
dir.add(dyndir).div(x+y);
if(dir.iszero()) dir = vec(0, 0, 1);
else dir.normalize();
}
}
#endif
color.add(dyncolor);
}
void calcdynlightmask(vtxarray *va)
{
uint mask = 0;
int offset = 0;
loopv(closedynlights)
{
dynlight &d = *closedynlights[i];
if(d.o.dist_to_bb(va->geommin, va->geommax) >= d.curradius) continue;
mask |= (i+1)<<offset;
offset += DYNLIGHTBITS;
if(offset >= maxdynlights*DYNLIGHTBITS) break;
}
va->dynlightmask = mask;
}
int setdynlights(vtxarray *va)
{
if(closedynlights.empty() || !va->dynlightmask) return 0;
extern bool minimizedynlighttcusage();
static vec4 posv[MAXDYNLIGHTS];
static vec colorv[MAXDYNLIGHTS];
int index = 0;
for(uint mask = va->dynlightmask; mask; mask >>= DYNLIGHTBITS, index++)
{
dynlight &d = *closedynlights[(mask&DYNLIGHTMASK)-1];
float scale = 1.0f/d.curradius;
vec origin = vec(d.o).mul(-scale);
if(index>0 && minimizedynlighttcusage())
{
scale /= posv[0].w;
origin.sub(vec(posv[0]).mul(scale));
}
posv[index] = vec4(origin, scale);
colorv[index] = d.curcolor;
}
GLOBALPARAMV(dynlightpos, posv, index);
GLOBALPARAMV(dynlightcolor, colorv, index);
return index;
}
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