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Fix #416: Division by zero for trains of 0 mass

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In maximum achievable speed estimator
This commit is contained in:
Jonathan G Rennison
2022-09-04 18:20:09 +01:00
parent 0400f06d9e
commit e3896b69d3
4 changed files with 8 additions and 4 deletions
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2
src/tbtr_template_vehicle.h
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@@ -225,6 +225,6 @@ short DeleteTemplateReplacementsByGroupID(GroupID);
void ReindexTemplateReplacements();
int GetTemplateVehicleEstimatedMaxAchievableSpeed(const TemplateVehicle *tv, const int mass, const int speed_cap);
int GetTemplateVehicleEstimatedMaxAchievableSpeed(const TemplateVehicle *tv, int mass, const int speed_cap);
#endif /* TEMPLATE_VEH_H */

4
src/tbtr_template_vehicle_func.cpp
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@@ -502,11 +502,13 @@ void UpdateAllTemplateVehicleImages()
_template_vehicle_images_valid = true;
}
int GetTemplateVehicleEstimatedMaxAchievableSpeed(const TemplateVehicle *tv, const int mass, const int speed_cap)
int GetTemplateVehicleEstimatedMaxAchievableSpeed(const TemplateVehicle *tv, int mass, const int speed_cap)
{
int max_speed = 0;
int acceleration;
if (mass < 1) mass = 1;
do
{
max_speed++;

2
src/train.h
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@@ -520,6 +520,6 @@ inline int GetTileMarginInFrontOfTrain(const Train *v)
int GetTrainStopLocation(StationID station_id, TileIndex tile, Train *v, bool update_train_state, int *station_ahead, int *station_length);
int GetTrainRealisticAccelerationAtSpeed(const int speed, const int mass, const uint32 cached_power, const uint32 max_te, const uint32 air_drag, const RailType railtype);
int GetTrainEstimatedMaxAchievableSpeed(const Train *train, const int mass, const int speed_cap);
int GetTrainEstimatedMaxAchievableSpeed(const Train *train, int mass, const int speed_cap);
#endif /* TRAIN_H */

4
src/train_cmd.cpp
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@@ -7320,11 +7320,13 @@ int GetTrainRealisticAccelerationAtSpeed(const int speed, const int mass, const
return acceleration;
}
int GetTrainEstimatedMaxAchievableSpeed(const Train *train, const int mass, const int speed_cap)
int GetTrainEstimatedMaxAchievableSpeed(const Train *train, int mass, const int speed_cap)
{
int max_speed = 0;
int acceleration;
if (mass < 1) mass = 1;
do
{
max_speed++;