int i,j;
    while(h>1){
        m = int(h/2);
        i = m;

        //square values
        while(i < tmap_size-1){
            j = m;
            while(j < tmap_size-1){
                tmap[i][j] = get_sqr_avg(i,j,m);
                j+=(m*2);
            }
            i+=(m*2);
        }

        //diamond values
        bool odd = false;
        i = 0;
        while(i <= tmap_size-1){
            if(!odd) j = m;
            else j = 0;
            while(j <= tmap_size-1){
                tmap[i][j] = get_dia_avg(i,j,m);
                j+=(m*2);
            }
            i += m;
            if(odd) odd = false;
            else odd = true;
        }
        random_offset *= offset_dr;
        if(random_offset<1) random_offset = 1;

        if(h == 2){
            h = 0;
        }
        else h /= 2;

    }