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| author | michi_cc <michi_cc@openttd.org> | 2011-11-06 15:33:23 +0000 |
|---|---|---|
| committer | michi_cc <michi_cc@openttd.org> | 2011-11-06 15:33:23 +0000 |
| commit | 1b66101bd30cb2c13d6c3fd735142b8e68230d24 (patch) | |
| tree | c9fca420ba44a847b16bcf24a198a87457e57686 /src/vehicle_cmd.cpp | |
| parent | 1f823f89a15661cdeedaaee9e036b137afc674df (diff) | |
| download | openttd-1b66101bd30cb2c13d6c3fd735142b8e68230d24.tar.xz | |
(svn r23124) -Change: [NewGRF] Interpret the result of the refit cost callback as a signed value.
Diffstat (limited to 'src/vehicle_cmd.cpp')
| -rw-r--r-- | src/vehicle_cmd.cpp | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/src/vehicle_cmd.cpp b/src/vehicle_cmd.cpp index 727a63325..7c6e33ae0 100644 --- a/src/vehicle_cmd.cpp +++ b/src/vehicle_cmd.cpp @@ -208,7 +208,7 @@ CommandCost CmdSellVehicle(TileIndex tile, DoCommandFlag flags, uint32 p1, uint3 } /** Helper to run the refit cost callback. */ -static uint GetRefitCostFactor(const Vehicle *v, EngineID engine_type, CargoID new_cid, byte new_subtype, bool *auto_refit_allowed) +static int GetRefitCostFactor(const Vehicle *v, EngineID engine_type, CargoID new_cid, byte new_subtype, bool *auto_refit_allowed) { /* Prepare callback param with info about the new cargo type. */ const Engine *e = Engine::Get(engine_type); @@ -218,7 +218,9 @@ static uint GetRefitCostFactor(const Vehicle *v, EngineID engine_type, CargoID n uint16 cb_res = GetVehicleCallback(CBID_VEHICLE_REFIT_COST, param1, 0, engine_type, v); if (cb_res != CALLBACK_FAILED) { *auto_refit_allowed = HasBit(cb_res, 14); - return GB(cb_res, 0, 14); + int factor = GB(cb_res, 0, 14); + if (factor >= 0x2000) factor -= 0x4000; // Treat as signed integer. + return factor; } *auto_refit_allowed = e->info.refit_cost == 0; @@ -239,7 +241,7 @@ static CommandCost GetRefitCost(const Vehicle *v, EngineID engine_type, CargoID ExpensesType expense_type; const Engine *e = Engine::Get(engine_type); Price base_price; - uint cost_factor = GetRefitCostFactor(v, engine_type, new_cid, new_subtype, auto_refit_allowed); + int cost_factor = GetRefitCostFactor(v, engine_type, new_cid, new_subtype, auto_refit_allowed); switch (e->type) { case VEH_SHIP: base_price = PR_BUILD_VEHICLE_SHIP; @@ -264,7 +266,11 @@ static CommandCost GetRefitCost(const Vehicle *v, EngineID engine_type, CargoID default: NOT_REACHED(); } - return CommandCost(expense_type, GetPrice(base_price, cost_factor, e->GetGRF(), -10)); + if (cost_factor < 0) { + return CommandCost(expense_type, -GetPrice(base_price, -cost_factor, e->GetGRF(), -10)); + } else { + return CommandCost(expense_type, GetPrice(base_price, cost_factor, e->GetGRF(), -10)); + } } /** |