Function voptimize

source/src/worldio.cpp:31–39

inline bool nhf(sqr *s) { return s->type!=FHF && s->type!=CHF; }

void voptimize()        // reset vdeltas on non-hf cubes
{
    loop(y, ssize) loop(x, ssize)
    {
        sqr *s = S(x, y);
        if(x && y) { if(nhf(s) && nhf(S(x-1, y)) && nhf(S(x-1, y-1)) && nhf(S(x, y-1))) s->vdelta = 0; }
        else s->vdelta = 0;
    }
}

// these two are used by getmap/sendmap.. transfers compressed maps directly