function(sourceA, sourceB){
if(sourceB == undefined){ return true }
return(
distance_between(sourceA.pos, spawn.pos) <
distance_between(sourceB.pos, spawn.pos)
);
}
function(item_a, item_b){
if(item_b == undefined || item_b == null){
return false;
}
return(
distance_between(target.pos, item_a.pos) <
distance_between(target.pos, item_b.pos)
);
}
function(source){
var dist = distance_between(source.pos, spawn.pos);
var output = {
source_id: source.id,
distance: dist,
harvester_count: distance_to_harvester_quota(dist)
};
return output;
}