Am Saturday 10 October 2009 09:54:26 schrieb Goswin von Brederlow: > Matthias Pfafferodt <matthias.pfaffer...@mapfa.de> writes: > > Am Thursday 08 October 2009 01:43:23 schrieb Goswin von Brederlow: > >> On a related matter, how does migration work with the patch? > >> > >> The patch says the city radius is considered. Does the other city need > >> to lie within the city raidus? Do the city radius of both cities need > >> to overlap? Can there be a gap of <x> tiles between the city radii of > >> both cities? > >> > >> I think the migration distance config option should select this, e.g. > >> > >> -99: city must lie within city radius > >> -x: city radii must overlap > >> 0: city radii must touch > >> x: there may be x tiles between city radii > >> > >> I think a default of -1 would make sense. > > > > At the moment migration is defined by a migration distance (1 to 7). The > > patch #1232 adds the possibility to set the migration distance to 0. In > > this case, the migration distance depends on the city radius (migration > > distance = city radius + 1; your case 0). > > I will definetly want to have more choices there.
The migration distance setting could also be defined as the value added to the current city radius. This would require a change of the current definition (name). Example: city_radius_sq = 5 => city_radius = 2 mgr_dist = 2 max distance for migration (tiles) = 2 + 2 =4 city_radius_sq = 10 => city_radius = 3(.1) = 3 mgr_dist = 2 max distance for migration (tiles) = 3 + 2 =5 > > > As for the migration one has to check all tiles within migration radius > > of the receiving city for giver cities the radius should be as small as > > possible. > > If checking the tiles is too expensive then cache the result: > > When creating a city check if it is within the migration radius of > another city and link it into a migration list for that city. When > the city radius of a city changes (and therefor migration radius) then > scan the area once to rebuild the list. This list has to be updated every time a city is created or destroyed. Furthermore it would spread the code needed for migration over a lot of files. At the moment it is mainly in one file. > > But is it too much work? If I understood migration right then it is > done only once every 5 turns. That's right. Migration is checked every fifth turn after a city was founded (default settings). Does the variable city radii work for you? Matthias > > MfG > Goswin > > _______________________________________________ > Freeciv-dev mailing list > Freeciv-dev@gna.org > https://mail.gna.org/listinfo/freeciv-dev -- Matthias Pfafferodt - http://www.mapfa.de Matthias.Pfafferodt <at> mapfa.de _______________________________________________ Freeciv-dev mailing list Freeciv-dev@gna.org https://mail.gna.org/listinfo/freeciv-dev
