Function ShipController

src/ship_cmd.cpp:669–837

}

static void ShipController(Ship *v)
{
	v->tick_counter++;
	v->current_order_time++;

	if (v->HandleBreakdown()) return;

	if (v->vehstatus.Test(VehState::Stopped)) return;

	if (ProcessOrders(v) && CheckReverseShip(v)) return ReverseShip(v);

	v->HandleLoading();

	if (v->current_order.IsType(OT_LOADING)) return;

	if (CheckShipStayInDepot(v)) return;

	v->ShowVisualEffect();

	/* Rotating on spot */
	if (v->direction != v->rotation) {
		if ((v->tick_counter & 7) == 0) {
			DirDiff diff = DirDifference(v->direction, v->rotation);
			v->rotation = ChangeDir(v->rotation, diff > DIRDIFF_REVERSE ? DIRDIFF_45LEFT : DIRDIFF_45RIGHT);
			/* Invalidate the sprite cache direction to force recalculation of viewport */
			v->sprite_cache.last_direction = INVALID_DIR;
			v->UpdateViewport(true, true);
		}
		return;
	}

	if (ShipMoveUpDownOnLock(v)) return;

	const uint number_of_steps = ShipAccelerate(v);
	for (uint i = 0; i < number_of_steps; ++i) {
		if (ShipMoveUpDownOnLock(v)) return;

		GetNewVehiclePosResult gp = GetNewVehiclePos(v);
		if (v->state != TRACK_BIT_WORMHOLE) {
			/* Not on a bridge */
			if (gp.old_tile == gp.new_tile) {
				/* Staying in tile */
				if (v->IsInDepot()) {
					gp.x = v->x_pos;
					gp.y = v->y_pos;
				} else {
					/* Not inside depot */
					auto vets = VehicleEnterTile(v, gp.new_tile, gp.x, gp.y);
					if (vets.Test(VehicleEnterTileState::CannotEnter)) return ReverseShip(v);

					/* A leave station order only needs one tick to get processed, so we can
					 * always skip ahead. */
					if (v->current_order.IsType(OT_LEAVESTATION)) {
						v->current_order.Free();
						SetWindowWidgetDirty(WC_VEHICLE_VIEW, v->index, WID_VV_START_STOP);
						/* Test if continuing forward would lead to a dead-end, moving into the dock. */
						const DiagDirection exitdir = VehicleExitDir(v->direction, v->state);
						const TileIndex tile = TileAddByDiagDir(v->tile, exitdir);