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navigate: Require all ships to start in the same sector

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The capability to navigate ships spread over several sectors is
obscure and rarely useful.  Accidental use is probably more frequent
than intentional use.  Issues:

* Interactive prompts show only the flagship's position, and give no
  clue that some ships are actually elsewhere.

* Path finding is supported only when all navigating ships are in
  the same sector.

* Interdiction becomes rather complex.  For each movement, every
  sector entered is interdicted independently.  This means the same
  fort, ship, land unit or plane can interdict multiple times.
  Interdiction order depends on the order the code examines
  ships. which the player can control.  This is all pretty much
  undocumented.

* Complicates the code and its maintenance.  Multiplies the number of
  test cases needed to cover navigate.

I feel we're better off without this feature.

Signed-off-by: Markus Armbruster <armbru@pond.sub.org>
This commit is contained in:
Markus Armbruster 2014-12-28 22:27:37 +01:00
parent 69c99a0f29
commit a024dbb8a3
9 changed files with 44 additions and 60 deletions
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4
include/ship.h
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@ -171,12 +171,12 @@ extern double shp_torp_hitchance(struct shpstr *, int);
/* src/lib/subs/shpsub.c */
extern void shp_sel(struct nstr_item *, struct emp_qelem *);
extern struct ulist *shp_insque(struct shpstr *, struct emp_qelem *);
extern void shp_nav(struct emp_qelem *, double *, double *, int *, natid);
extern void shp_nav(struct emp_qelem *, double *, double *, natid);
extern int shp_sweep(struct emp_qelem *, int, int, natid);
extern enum shp_stuck shp_check_nav(struct shpstr *, struct sctstr *);
extern int sect_has_dock(struct sctstr *);
extern int shp_hardtarget(struct shpstr *);
extern int shp_nav_one_sector(struct emp_qelem *, int, natid, int);
extern int shp_nav_one_sector(struct emp_qelem *, int, natid);
extern int shp_missile_defense(coord, coord, natid, int);
extern void shp_missdef(struct shpstr *, natid);
extern double shp_mobcost(struct shpstr *);