(svn r19345) -Feature: Realistic acceleration for road vehicles.

src/settings.cpp

@@ -64,6 +64,7 @@
 #include "company_base.h"
 #include "engine_base.h"
 #include "smallmap_gui.h"
+#include "roadveh.h"
 
 #include "void_map.h"
 #include "station_base.h"
@@ -774,6 +775,25 @@ static bool TrainSlopeSteepnessChanged(int32 p1)
 	return true;
 }
 
+/**
+ * This function updates realistic acceleration caches when the setting "Road vehicle acceleration model" is set.
+ * @param p1 Callback parameter
+ * @return Always true
+ */
+static bool RoadVehAccelerationModelChanged(int32 p1)
+{
+	if (_settings_game.vehicle.roadveh_acceleration_model != AM_ORIGINAL) {
+		RoadVehicle *rv;
+		FOR_ALL_ROADVEHICLES(rv) {
+			if (rv->IsRoadVehFront()) {
+				rv->CargoChanged();
+			}
+		}
+	}
+
+	return true;
+}
+
 static bool DragSignalsDensityChanged(int32)
 {
 	InvalidateWindowData(WC_BUILD_SIGNAL, 0);