diff options
Diffstat (limited to 'src/engine/dynlight.cpp')
| -rw-r--r-- | src/engine/dynlight.cpp | 227 |
1 files changed, 227 insertions, 0 deletions
diff --git a/src/engine/dynlight.cpp b/src/engine/dynlight.cpp new file mode 100644 index 0000000..835c631 --- /dev/null +++ b/src/engine/dynlight.cpp @@ -0,0 +1,227 @@ +#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; +} + |