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(svn r22997) -Feature: [NewGRF] Allow access to other vehicles in the vehicle chain in VarAction 2.

This commit is contained in:
michi_cc 2011-10-04 21:35:29 +00:00
parent 655cee276c
commit 3cb1dcf31c
2 changed files with 62 additions and 29 deletions
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75
src/newgrf_engine.cpp
View File

@ -483,36 +483,8 @@ static uint32 PositionHelper(const Vehicle *v, bool consecutive)
return chain_before | chain_after << 8 | (chain_before + chain_after + consecutive) << 16;
}
static uint32 VehicleGetVariable(const ResolverObject *object, byte variable, byte parameter, bool *available)
static uint32 VehicleGetVariable(Vehicle *v, const ResolverObject *object, byte variable, byte parameter, bool *available)
{
Vehicle *v = const_cast<Vehicle*>(GRV(object));
if (v == NULL) {
/* Vehicle does not exist, so we're in a purchase list */
switch (variable) {
case 0x43: return GetCompanyInfo(_current_company, LiveryHelper(object->u.vehicle.self_type, NULL)); // Owner information
case 0x46: return 0; // Motion counter
case 0x47: { // Vehicle cargo info
const Engine *e = Engine::Get(object->u.vehicle.self_type);
CargoID cargo_type = e->GetDefaultCargoType();
if (cargo_type != CT_INVALID) {
const CargoSpec *cs = CargoSpec::Get(cargo_type);
return (cs->classes << 16) | (cs->weight << 8) | GetEngineGRF(e->index)->cargo_map[cargo_type];
} else {
return 0x000000FF;
}
}
case 0x48: return Engine::Get(object->u.vehicle.self_type)->flags; // Vehicle Type Info
case 0x49: return _cur_year; // 'Long' format build year
case 0xC4: return Clamp(_cur_year, ORIGINAL_BASE_YEAR, ORIGINAL_MAX_YEAR) - ORIGINAL_BASE_YEAR; // Build year
case 0xDA: return INVALID_VEHICLE; // Next vehicle
case 0xF2: return 0; // Cargo subtype
}
*available = false;
return UINT_MAX;
}
/* Calculated vehicle parameters */
switch (variable) {
case 0x25: // Get engine GRF ID
@ -668,6 +640,18 @@ static uint32 VehicleGetVariable(const ResolverObject *object, byte variable, by
return count;
}
case 0x61: // Get variable of n-th vehicle in chain [signed number relative to vehicle]
if (!v->IsGroundVehicle() || parameter == 0x61) return 0;
/* Only allow callbacks that don't change properties to avoid circular dependencies. */
if (object->callback == CBID_NO_CALLBACK || object->callback == CBID_TRAIN_ALLOW_WAGON_ATTACH || object->callback == CBID_VEHICLE_START_STOP_CHECK || object->callback == CBID_VEHICLE_32DAY_CALLBACK) {
Vehicle *u = v->Move((int32)GetRegister(0x10F));
if (u == NULL) return 0;
return VehicleGetVariable(u, object, parameter, GetRegister(0x10E), available);
}
return 0;
case 0xFE:
case 0xFF: {
uint16 modflags = 0;
@ -846,6 +830,39 @@ static uint32 VehicleGetVariable(const ResolverObject *object, byte variable, by
return UINT_MAX;
}
static uint32 VehicleGetVariable(const ResolverObject *object, byte variable, byte parameter, bool *available)
{
Vehicle *v = const_cast<Vehicle*>(GRV(object));
if (v == NULL) {
/* Vehicle does not exist, so we're in a purchase list */
switch (variable) {
case 0x43: return GetCompanyInfo(_current_company, LiveryHelper(object->u.vehicle.self_type, NULL)); // Owner information
case 0x46: return 0; // Motion counter
case 0x47: { // Vehicle cargo info
const Engine *e = Engine::Get(object->u.vehicle.self_type);
CargoID cargo_type = e->GetDefaultCargoType();
if (cargo_type != CT_INVALID) {
const CargoSpec *cs = CargoSpec::Get(cargo_type);
return (cs->classes << 16) | (cs->weight << 8) | GetEngineGRF(e->index)->cargo_map[cargo_type];
} else {
return 0x000000FF;
}
}
case 0x48: return Engine::Get(object->u.vehicle.self_type)->flags; // Vehicle Type Info
case 0x49: return _cur_year; // 'Long' format build year
case 0xC4: return Clamp(_cur_year, ORIGINAL_BASE_YEAR, ORIGINAL_MAX_YEAR) - ORIGINAL_BASE_YEAR; // Build year
case 0xDA: return INVALID_VEHICLE; // Next vehicle
case 0xF2: return 0; // Cargo subtype
}
*available = false;
return UINT_MAX;
}
return VehicleGetVariable(v, object, variable, parameter, available);
}
static const SpriteGroup *VehicleResolveReal(const ResolverObject *object, const RealSpriteGroup *group)
{

16
src/vehicle_base.h
View File

@ -498,6 +498,22 @@ public:
return v;
}
/**
* Get the vehicle at offset #n of this vehicle chain.
* @param n Offset from the current vehicle.
* @return The new vehicle or NULL if the offset is out-of-bounds.
*/
inline Vehicle *Move(int n)
{
Vehicle *v = this;
if (n < 0) {
for (int i = 0; i != n && v != NULL; i--) v = v->Previous();
} else {
for (int i = 0; i != n && v != NULL; i++) v = v->Next();
}
return v;
}
/**
* Get the first order of the vehicles order list.
* @return first order of order list.