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@ -655,6 +655,7 @@ void StartupOneEngine(Engine *e, Date aging_date)
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e->age = 0;
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e->flags = 0;
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e->company_avail = 0;
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e->company_hidden = 0;
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/* Don't randomise the start-date in the first two years after gamestart to ensure availability
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* of engines in early starting games.
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@ -853,6 +854,41 @@ void EnginesDailyLoop()
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}
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}
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/**
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* Clear the 'hidden' flag for all engines of a new company.
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* @param cid Company being created.
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*/
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void ClearEnginesHiddenFlagOfCompany(CompanyID cid)
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{
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Engine *e;
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FOR_ALL_ENGINES(e) {
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SB(e->company_hidden, cid, 1, 0);
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}
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}
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/**
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* Set the visibility of an engine.
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* @param tile Unused.
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* @param flags Operation to perform.
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* @param p1 Unused.
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* @param p2 Bit 31: 0=visible, 1=hidden, other bits for the #EngineID.
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* @param text Unused.
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* @return The cost of this operation or an error.
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*/
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CommandCost CmdSetVehicleVisibility(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
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{
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Engine *e = Engine::GetIfValid(GB(p2, 0, 31));
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if (e == NULL || _current_company >= MAX_COMPANIES) return CMD_ERROR;
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if ((e->flags & ENGINE_AVAILABLE) == 0 || !HasBit(e->company_avail, _current_company)) return CMD_ERROR;
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if ((flags & DC_EXEC) != 0) {
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SB(e->company_hidden, _current_company, 1, GB(p2, 31, 1));
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AddRemoveEngineFromAutoreplaceAndBuildWindows(e->type);
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}
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return CommandCost();
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}
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/**
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* Accept an engine prototype. XXX - it is possible that the top-company
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* changes while you are waiting to accept the offer? Then it becomes invalid
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