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(svn r19338) -Codechange: Move the acceleration cache to GroundVehicle.

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This commit is contained in:
terkhen 2010-03-06 12:42:53 +00:00
parent f428102092
commit e4a5a556b4
6 changed files with 55 additions and 54 deletions
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24
src/ground_vehicle.hpp
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@ -14,11 +14,35 @@
#include "vehicle_base.h"
/** What is the status of our acceleration? */
enum AccelStatus {
AS_ACCEL, ///< We want to go faster, if possible of course.
AS_BRAKE ///< We want to stop.
};
/**
* Cached acceleration values.
* All of these values except cached_slope_resistance are set only for the first part of a vehicle.
*/
struct AccelerationCache {
/* Cached values, recalculated when the cargo on a vehicle changes (in addition to the conditions below) */
uint32 cached_weight; ///< Total weight of the consist.
uint32 cached_slope_resistance; ///< Resistance caused by weight when this vehicle part is at a slope.
uint32 cached_max_te; ///< Maximum tractive effort of consist.
/* Cached values, recalculated on load and each time a vehicle is added to/removed from the consist. */
uint32 cached_power; ///< Total power of the consist.
uint32 cached_air_drag; ///< Air drag coefficient of the vehicle.
uint16 cached_axle_resistance; ///< Resistance caused by the axles of the vehicle.
uint16 cached_max_track_speed; ///< Maximum consist speed limited by track type.
};
/**
* Base class for all vehicles that move through ground.
*/
template <class T, VehicleType Type>
struct GroundVehicle : public SpecializedVehicle<T, Type> {
AccelerationCache acc_cache;
/**
* The constructor at SpecializedVehicle must be called.

8
src/newgrf_engine.cpp
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@ -778,10 +778,10 @@ static uint32 VehicleGetVariable(const ResolverObject *object, byte variable, by
case 0x62: return t->track;
case 0x66: return t->railtype;
case 0x73: return t->tcache.cached_veh_length;
case 0x74: return t->tcache.cached_power;
case 0x75: return GB(t->tcache.cached_power, 8, 24);
case 0x76: return GB(t->tcache.cached_power, 16, 16);
case 0x77: return GB(t->tcache.cached_power, 24, 8);
case 0x74: return t->acc_cache.cached_power;
case 0x75: return GB(t->acc_cache.cached_power, 8, 24);
case 0x76: return GB(t->acc_cache.cached_power, 16, 16);
case 0x77: return GB(t->acc_cache.cached_power, 24, 8);
case 0x7C: return t->First()->index;
case 0x7D: return GB(t->First()->index, 8, 8);
case 0x7F: return 0; // Used for vehicle reversing hack in TTDP

29
src/train.h
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@ -56,25 +56,8 @@ bool TryPathReserve(Train *v, bool mark_as_stuck = false, bool first_tile_okay =
int GetTrainStopLocation(StationID station_id, TileIndex tile, const Train *v, int *station_ahead, int *station_length);
/**
* Cached acceleration values.
* All of these values except cached_slope_resistance are set only for the first part of a vehicle.
*/
struct AccelerationCache {
/* cached values, recalculated when the cargo on a train changes (in addition to the conditions above) */
uint32 cached_weight; ///< total weight of the consist.
uint32 cached_slope_resistance; ///< Resistance caused by weight when this vehicle part is at a slope
uint32 cached_max_te; ///< max tractive effort of consist
/* cached values, recalculated on load and each time a vehicle is added to/removed from the consist. */
uint32 cached_power; ///< total power of the consist.
uint32 cached_air_drag; ///< Air drag coefficient of the vehicle
uint16 cached_axle_resistance; ///< Resistance caused by the axles of the vehicle
uint16 cached_max_track_speed; ///< Max consist speed limited by track type
};
/** Variables that are cached to improve performance and such */
struct TrainCache : public AccelerationCache {
struct TrainCache {
/* Cached wagon override spritegroup */
const struct SpriteGroup *cached_override;
@ -102,12 +85,6 @@ struct TrainCache : public AccelerationCache {
EngineID first_engine; ///< cached EngineID of the front vehicle. INVALID_ENGINE for the front vehicle itself.
};
/** What is the status of our acceleration? */
enum AccelStatus {
AS_ACCEL, ///< We want to go faster, if possible ofcourse
AS_BRAKE ///< We want to stop
};
/**
* 'Train' is either a loco or a wagon.
*/
@ -486,9 +463,9 @@ protected: // These functions should not be called outside acceleration code.
for (const Train *u = this; u != NULL; u = u->Next()) {
if (HasBit(u->flags, VRF_GOINGUP)) {
incl += u->tcache.cached_slope_resistance;
incl += u->acc_cache.cached_slope_resistance;
} else if (HasBit(u->flags, VRF_GOINGDOWN)) {
incl -= u->tcache.cached_slope_resistance;
incl -= u->acc_cache.cached_slope_resistance;
}
}

38
src/train_cmd.cpp
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@ -115,22 +115,22 @@ void Train::PowerChanged()
if (track_speed > 0) max_track_speed = min(max_track_speed, track_speed);
}
this->tcache.cached_axle_resistance = 60 * number_of_parts;
this->tcache.cached_air_drag = 20 + 3 * number_of_parts;
this->acc_cache.cached_axle_resistance = 60 * number_of_parts;
this->acc_cache.cached_air_drag = 20 + 3 * number_of_parts;
max_te *= 10000; // Tractive effort in (tonnes * 1000 * 10 =) N
max_te /= 256; // Tractive effort is a [0-255] coefficient
if (this->tcache.cached_power != total_power || this->tcache.cached_max_te != max_te) {
if (this->acc_cache.cached_power != total_power || this->acc_cache.cached_max_te != max_te) {
/* Stop the vehicle if it has no power */
if (total_power == 0) this->vehstatus |= VS_STOPPED;
this->tcache.cached_power = total_power;
this->tcache.cached_max_te = max_te;
this->acc_cache.cached_power = total_power;
this->acc_cache.cached_max_te = max_te;
SetWindowDirty(WC_VEHICLE_DETAILS, this->index);
SetWindowWidgetDirty(WC_VEHICLE_VIEW, this->index, VVW_WIDGET_START_STOP_VEH);
}
this->tcache.cached_max_track_speed = max_track_speed;
this->acc_cache.cached_max_track_speed = max_track_speed;
}
@ -146,11 +146,11 @@ void Train::CargoChanged()
for (Train *u = this; u != NULL; u = u->Next()) {
uint32 current_weight = u->GetWeight();
weight += current_weight;
u->tcache.cached_slope_resistance = current_weight * u->GetSlopeSteepness();
u->acc_cache.cached_slope_resistance = current_weight * u->GetSlopeSteepness();
}
/* store consist weight in cache */
this->tcache.cached_weight = weight;
this->acc_cache.cached_weight = weight;
/* Now update train power (tractive effort is dependent on weight) */
this->PowerChanged();
@ -498,7 +498,7 @@ int Train::GetCurrentMaxSpeed() const
}
}
return min(max_speed, this->tcache.cached_max_track_speed);
return min(max_speed, this->acc_cache.cached_max_track_speed);
}
/**
@ -511,10 +511,10 @@ int Train::GetAcceleration() const
int32 speed = this->GetCurrentSpeed();
/* Weight is stored in tonnes */
int32 mass = this->tcache.cached_weight;
int32 mass = this->acc_cache.cached_weight;
/* Power is stored in HP, we need it in watts. */
int32 power = this->tcache.cached_power * 746;
int32 power = this->acc_cache.cached_power * 746;
int32 resistance = 0;
@ -523,11 +523,11 @@ int Train::GetAcceleration() const
const int area = 120;
if (!maglev) {
resistance = (13 * mass) / 10;
resistance += this->tcache.cached_axle_resistance;
resistance += this->acc_cache.cached_axle_resistance;
resistance += (this->GetRollingFriction() * mass * speed) / 1000;
resistance += (area * this->tcache.cached_air_drag * speed * speed) / 10000;
resistance += (area * this->acc_cache.cached_air_drag * speed * speed) / 10000;
} else {
resistance += (area * this->tcache.cached_air_drag * speed * speed) / 20000;
resistance += (area * this->acc_cache.cached_air_drag * speed * speed) / 20000;
}
resistance += this->GetSlopeResistance();
@ -536,7 +536,7 @@ int Train::GetAcceleration() const
/* This value allows to know if the vehicle is accelerating or braking. */
AccelStatus mode = this->GetAccelerationStatus();
const int max_te = this->tcache.cached_max_te; // [N]
const int max_te = this->acc_cache.cached_max_te; // [N]
int force;
if (speed > 0) {
if (!maglev) {
@ -564,10 +564,10 @@ void Train::UpdateAcceleration()
{
assert(this->IsFrontEngine());
this->max_speed = this->tcache.cached_max_track_speed;
this->max_speed = this->acc_cache.cached_max_track_speed;
uint power = this->tcache.cached_power;
uint weight = this->tcache.cached_weight;
uint power = this->acc_cache.cached_power;
uint weight = this->acc_cache.cached_weight;
assert(weight != 0);
this->acceleration = Clamp(power / weight * 4, 1, 255);
}
@ -2265,7 +2265,7 @@ static bool CheckTrainStayInDepot(Train *v)
}
/* if the train got no power, then keep it in the depot */
if (v->tcache.cached_power == 0) {
if (v->acc_cache.cached_power == 0) {
v->vehstatus |= VS_STOPPED;
SetWindowDirty(WC_VEHICLE_DEPOT, v->tile);
return true;

2
src/vehicle_cmd.cpp
View File

@ -78,7 +78,7 @@ CommandCost CmdStartStopVehicle(TileIndex tile, DoCommandFlag flags, uint32 p1,
switch (v->type) {
case VEH_TRAIN:
if ((v->vehstatus & VS_STOPPED) && Train::From(v)->tcache.cached_power == 0) return_cmd_error(STR_ERROR_TRAIN_START_NO_CATENARY);
if ((v->vehstatus & VS_STOPPED) && Train::From(v)->acc_cache.cached_power == 0) return_cmd_error(STR_ERROR_TRAIN_START_NO_CATENARY);
break;
case VEH_SHIP:

8
src/vehicle_gui.cpp
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@ -1525,9 +1525,9 @@ struct VehicleDetailsWindow : Window {
switch (v->type) {
case VEH_TRAIN:
SetDParam(2, v->GetDisplayMaxSpeed());
SetDParam(1, Train::From(v)->tcache.cached_power);
SetDParam(0, Train::From(v)->tcache.cached_weight);
SetDParam(3, Train::From(v)->tcache.cached_max_te / 1000);
SetDParam(1, Train::From(v)->acc_cache.cached_power);
SetDParam(0, Train::From(v)->acc_cache.cached_weight);
SetDParam(3, Train::From(v)->acc_cache.cached_max_te / 1000);
DrawString(r.left + WD_FRAMERECT_LEFT, r.right - WD_FRAMERECT_RIGHT, y, (_settings_game.vehicle.train_acceleration_model != AM_ORIGINAL && GetRailTypeInfo(Train::From(v)->railtype)->acceleration_type != 2) ?
STR_VEHICLE_INFO_WEIGHT_POWER_MAX_SPEED_MAX_TE : STR_VEHICLE_INFO_WEIGHT_POWER_MAX_SPEED);
break;
@ -1963,7 +1963,7 @@ public:
} else if (v->vehstatus & VS_STOPPED) {
if (v->type == VEH_TRAIN) {
if (v->cur_speed == 0) {
if (Train::From(v)->tcache.cached_power == 0) {
if (Train::From(v)->acc_cache.cached_power == 0) {
str = STR_VEHICLE_STATUS_TRAIN_NO_POWER;
} else {
str = STR_VEHICLE_STATUS_STOPPED;