Function calclight

source/src/worldlight.cpp:179–217

VARF(ambient, 0, 0, 0xFFFFFF, if(!noteditmode("ambient")) { hdr.ambient = ambient; calclight(); unsavededits++;});

void calclight()
{
    if(editmode)
    {
        servsqr *servworld = createservworld(world, cubicsize);
        calcmapdims(clmapdims, servworld, ssize);
        delete[] servworld;
    }
    uchar r = (hdr.ambient>>16) & 0xFF, g = (hdr.ambient>>8) & 0xFF, b = hdr.ambient & 0xFF;
    if(!r && !g)
    {
        if(!b) b = 10;
        r = g = b;
    }
    else if(!maxtmus) r = g = b = max(max(r, g), b); // the old (white) light code, here for the few people with old video cards that don't support overbright
    sqr *s = S(0,0);
    loopirev(cubicsize)
    {
        s->r = r;
        s->g = g;
        s->b = b;
        s++;
    }

    seedMT(ents.length() + hdr.maprevision);   // static seed -> nothing random here

    loopv(ents)
    {
        entity &e = ents[i];
        if(e.type==LIGHT) calclightsource(e);
    }

    popMT();   // undo the static seedMT() from above

    block bb = { clmapdims.x1 - 1, clmapdims.y1 - 1, clmapdims.xspan + 2, clmapdims.yspan + 2 };
    postlightarea(bb);
    setvar("fullbright", 0);
    lastcalclight = totalmillis;
}

struct dlight
{