[Freeciv-Dev] (PR#6669) Poles on a N-S wrapping topology

["Marcelo Burda" <mburda@xxxxxxxxx>]

<URL: http://rt.freeciv.org/Ticket/Display.html?id=6669 >

this is my proposal for make_poles, i am tested it in new topologies but 
i not undestand exactly the makepoles==1 rules. probably i no want it. 
i am debuged the map_clima funcion get my Full quincuncial patch (6721) 
for test it.

it handle all topologies

static void make_polar(void)
{
    int map_x,map_y,T,polar;
    struct tile *ptile;
    
    whole_map_iterate(map_x, map_y) {
        T=map_clima(map_x, map_y); /* temperature parameter */
        ptile = map_get_tile(map_x,map_y);
        if(T <= 10 ) /* get the 10% coolest part of the map */
        {
            if(!is_ocean(ptile->terrain)) 
            {
                if(T < (5+myrand(5))) /* 5% arctic + 5% arctic and tundra */
                    ptile->terrain = T_ARCTIC;
                else
                    ptile->terrain = T_TUNDRA;
            }
            else if(T < (5+myrand(5))) /* 5% arctic + 5% arctic and ocean */
                    ptile->terrain = T_ARCTIC;
                 
        } else if (T <= 30)
            if(ptile->terrain == T_JUNGLE) 
                 ptile->terrain = T_FOREST;
        if(map.separatepoles==0) return;
        /* handing spetial rules for borders */
        /* we realy need it? [mburda]*/
        if(XWRAP_TYPE(WT_SIMPLEST) && YWRAP_TYPE(WT_NONE))
        {
            polar = (get_maptype(MAP_TYPE_ISO) ? 3 : 1);
            /* etc */
        }
    } whole_map_iterate_end;
}

Marcelo