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(svn r4702) - NewGRF: add support for 'special' vehicle callbacks that use a different vehicle for parent scope than the first vehicle in the consist.

This commit is contained in:
peter1138 2006-05-02 21:42:11 +00:00
parent aee14a4a1e
commit a38c8605b0
2 changed files with 47 additions and 0 deletions
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46
newgrf_engine.c
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@ -800,6 +800,52 @@ uint16 GetVehicleCallback(uint16 callback, uint32 param1, uint32 param2, EngineI
return group->g.callback.result;
}
/**
* Evaluate a newgrf callback for vehicles with a different vehicle for parent scope.
* @param callback The callback to evalute
* @param param1 First parameter of the callback
* @param param2 Second parameter of the callback
* @param engine Engine type of the vehicle to evaluate the callback for
* @param v The vehicle to evaluate the callback for, or NULL if it doesnt exist yet
* @param parent The vehicle to use for parent scope
* @return The value the callback returned, or CALLBACK_FAILED if it failed
*/
uint16 GetVehicleCallbackParent(uint16 callback, uint32 param1, uint32 param2, EngineID engine, const Vehicle *v, const Vehicle *parent)
{
const SpriteGroup *group;
ResolverObject object;
CargoID cargo;
NewVehicleResolver(&object, v);
object.callback = callback;
object.callback_param1 = param1;
object.callback_param2 = param2;
object.u.vehicle.parent = parent;
cargo = (v == NULL) ? GC_PURCHASE : _global_cargo_id[_opt.landscape][v->cargo_type];
group = engine_custom_sprites[engine][cargo];
if (v != NULL && v->type == VEH_Train) {
const SpriteGroup *overset = GetWagonOverrideSpriteSet(engine, v->u.rail.first_engine);
if (overset != NULL) group = overset;
}
group = Resolve(group, &object);
if ((group == NULL || group->type != SGT_CALLBACK) && cargo != GC_DEFAULT) {
// This group is empty but perhaps there'll be a default one.
group = Resolve(engine_custom_sprites[engine][GC_DEFAULT], &object);
}
if (group == NULL || group->type != SGT_CALLBACK)
return CALLBACK_FAILED;
return group->g.callback.result;
}
static void DoTriggerVehicle(Vehicle *v, VehicleTrigger trigger, byte base_random_bits, bool first)
{

1
newgrf_engine.h
View File

@ -26,6 +26,7 @@ void SetEngineGRF(EngineID engine, uint32 grfid);
uint32 GetEngineGRFID(EngineID engine);
uint16 GetVehicleCallback(uint16 callback, uint32 param1, uint32 param2, EngineID engine, const Vehicle *v);
uint16 GetVehicleCallbackParent(uint16 callback, uint32 param1, uint32 param2, EngineID engine, const Vehicle *v, const Vehicle *parent);
bool UsesWagonOverride(const Vehicle *v);
#define GetCustomVehicleSprite(v, direction) GetCustomEngineSprite(v->engine_type, v, direction)
#define GetCustomVehicleIcon(et, direction) GetCustomEngineSprite(et, NULL, direction)