mirror of https://github.com/OpenTTD/OpenTTD.git
(svn r23086) -Feature: [NewGRF] Callback to change refit cost depending on old and new cargo type.
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@ -272,6 +272,9 @@ enum CallbackID {
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/** Called to determine if one can alter the ground below an object tile */
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CBID_OBJECT_AUTOSLOPE = 0x15D, // 15 bit callback
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/** Called to determine the cost factor for refitting a vehicle. */
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CBID_VEHICLE_REFIT_COST = 0x15E, // 15 bit callback
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};
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/**
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@ -31,6 +31,7 @@
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#include "company_base.h"
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#include "order_backup.h"
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#include "ship.h"
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#include "newgrf.h"
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#include "table/strings.h"
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@ -206,17 +207,36 @@ CommandCost CmdSellVehicle(TileIndex tile, DoCommandFlag flags, uint32 p1, uint3
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return ret;
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}
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/** Helper to run the refit cost callback. */
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static uint GetRefitCostFactor(const Vehicle *v, EngineID engine_type, CargoID new_cid, byte new_subtype)
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{
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/* Prepare callback param with info about the new cargo type. */
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const Engine *e = Engine::Get(engine_type);
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const CargoSpec *cs = CargoSpec::Get(new_cid);
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uint32 param1 = (cs->classes << 16) | (new_subtype << 8) | e->GetGRF()->cargo_map[new_cid];
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uint16 cb_res = GetVehicleCallback(CBID_VEHICLE_REFIT_COST, param1, 0, engine_type, v);
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if (cb_res != CALLBACK_FAILED) {
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return GB(cb_res, 0, 14);
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}
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return e->info.refit_cost;
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}
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/**
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* Learn the price of refitting a certain engine
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* @param v The vehicle we are refitting, can be NULL.
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* @param engine_type Which engine to refit
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* @param new_cid Cargo type we are refitting to.
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* @param new_subtype New cargo subtype.
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* @return Price for refitting
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*/
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static CommandCost GetRefitCost(EngineID engine_type)
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static CommandCost GetRefitCost(const Vehicle *v, EngineID engine_type, CargoID new_cid, byte new_subtype)
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{
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ExpensesType expense_type;
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const Engine *e = Engine::Get(engine_type);
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Price base_price;
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uint cost_factor = e->info.refit_cost;
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uint cost_factor = GetRefitCostFactor(v, engine_type, new_cid, new_subtype);
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switch (e->type) {
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case VEH_SHIP:
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base_price = PR_BUILD_VEHICLE_SHIP;
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@ -301,7 +321,7 @@ static CommandCost RefitVehicle(Vehicle *v, bool only_this, uint8 num_vehicles,
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v->cargo_subtype = temp_subtype;
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if (new_cid != v->cargo_type) {
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cost.AddCost(GetRefitCost(v->engine_type));
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cost.AddCost(GetRefitCost(v, v->engine_type, new_cid, new_subtype));
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}
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if (flags & DC_EXEC) {
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@ -793,7 +813,7 @@ CommandCost CmdCloneVehicle(TileIndex tile, DoCommandFlag flags, uint32 p1, uint
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CargoID initial_cargo = (e->CanCarryCargo() ? e->GetDefaultCargoType() : (CargoID)CT_INVALID);
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if (v->cargo_type != initial_cargo && initial_cargo != CT_INVALID) {
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total_cost.AddCost(GetRefitCost(v->engine_type));
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total_cost.AddCost(GetRefitCost(NULL, v->engine_type, v->cargo_type, v->cargo_subtype));
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}
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}
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