Author: sveinung
Date: Fri Jun 26 21:03:22 2015
New Revision: 29188
URL: http://svn.gna.org/viewcvs/freeciv?rev=29188&view=rev
Log:
Update action probability vs individual unit calculation
so it reflects rule changes.
Rule changes:
* It's not certain that the victim unit is alone at its tile.
* It's not certain that the actor is foreign.
* The victim unit of sabotage won't defend it self in a diplomatic battle.
See bug #23649
Modified:
trunk/common/actions.c
Modified: trunk/common/actions.c
URL:
http://svn.gna.org/viewcvs/freeciv/trunk/common/actions.c?rev=29188&r1=29187&r2=29188&view=diff
==============================================================================
--- trunk/common/actions.c (original)
+++ trunk/common/actions.c Fri Jun 26 21:03:22 2015
@@ -999,11 +999,12 @@
/**************************************************************************
The action probability that pattacker will win a diplomatic battle.
- It is assumed that pattacker and pdefender have different owners.
-
- See diplomat_infiltrate_tile() in server/diplomats.c
-**************************************************************************/
-static action_probability ap_diplomat_battle(const struct unit *pattacker,
+ It is assumed that pattacker and pdefender have different owners and that
+ the defender can defend in a diplomatic battle.
+
+ See diplomat_success_vs_defender() in server/diplomats.c
+**************************************************************************/
+static action_probability ap_dipl_battle_win(const struct unit *pattacker,
const struct unit *pdefender)
{
struct city *pcity;
@@ -1013,15 +1014,12 @@
/* Superspy always win */
if (unit_has_type_flag(pdefender, UTYF_SUPERSPY)) {
- /* In UTYF_SUPERSPY vs UTYF_SUPERSPY the attacker always dies. */
+ /* A defending UTYF_SUPERSPY will defeat every possible attacker. */
return ACTPROB_IMPOSSIBLE;
}
if (unit_has_type_flag(pattacker, UTYF_SUPERSPY)) {
- return 200;
- }
-
- /* This target is defenseless */
- if (!unit_has_type_flag(pdefender, UTYF_DIPLOMAT)) {
+ /* An attacking UTYF_SUPERSPY will defeat every possible defender
+ * except another UTYF_SUPERSPY. */
return 200;
}
@@ -1068,6 +1066,39 @@
/* Convert to action probability */
return chance * 2;
+}
+
+/**************************************************************************
+ The action probability that pattacker will win a diplomatic battle.
+
+ See diplomat_infiltrate_tile() in server/diplomats.c
+**************************************************************************/
+static action_probability ap_diplomat_battle(const struct unit *pattacker,
+ const struct unit *pvictim)
+{
+ unit_list_iterate(unit_tile(pvictim)->units, punit) {
+ if (unit_owner(punit) == unit_owner(pattacker)) {
+ /* Won't defend against its owner. */
+ continue;
+ }
+
+ if (punit == pvictim) {
+ /* A victim unit is defenseless. */
+ continue;
+ }
+
+ if (!(unit_has_type_flag(punit, UTYF_DIPLOMAT)
+ || unit_has_type_flag(punit, UTYF_SUPERSPY))) {
+ /* The unit can't defend. */
+ continue;
+ }
+
+ /* There will be a diplomatic battle in stead of an action. */
+ return ap_dipl_battle_win(pattacker, punit);
+ } unit_list_iterate_end;
+
+ /* No diplomatic battle will occur. */
+ return 200;
}
/**************************************************************************
@@ -1145,13 +1176,12 @@
/* TODO */
break;
case ACTION_SPY_SABOTAGE_UNIT:
- /* Hard coded limit: The victim unit is alone at the tile */
+ /* All uncertainty comes from potential diplomatic battles. */
chance = ap_diplomat_battle(actor_unit, target_unit);
break;
case ACTION_SPY_BRIBE_UNIT:
- /* Hard coded limit: The target unit is alone at its tile.
- * It won't fight a diplomatic battle. */
- chance = 200;
+ /* All uncertainty comes from potential diplomatic battles. */
+ chance = ap_diplomat_battle(actor_unit, target_unit);;
break;
case ACTION_SPY_SABOTAGE_CITY:
/* TODO */
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