52 lines
2.6 KiB
JavaScript
52 lines
2.6 KiB
JavaScript
// This constant used to adjust gain value depending on distance
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const DISTANCE_FACTOR = 1 / 110;
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// Additional gain (applying to each market) for trading performed between markets of different players, in percents
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const INTERNATIONAL_TRADING_ADDITION = 25;
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// If trader undefined, the trader owner is supposed to be the same as the first market
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function CalculateTraderGain(firstMarket, secondMarket, template, trader)
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{
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var gain = {};
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var cmpFirstMarketPosition = Engine.QueryInterface(firstMarket, IID_Position);
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var cmpSecondMarketPosition = Engine.QueryInterface(secondMarket, IID_Position);
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if (!cmpFirstMarketPosition || !cmpFirstMarketPosition.IsInWorld() || !cmpSecondMarketPosition || !cmpSecondMarketPosition.IsInWorld())
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return null;
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var firstMarketPosition = cmpFirstMarketPosition.GetPosition2D();
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var secondMarketPosition = cmpSecondMarketPosition.GetPosition2D();
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// Calculate ordinary Euclidean distance between markets.
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// We don't use pathfinder, because ordinary distance looks more fair.
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var distance = Math.sqrt(Math.pow(firstMarketPosition.x - secondMarketPosition.x, 2) + Math.pow(firstMarketPosition.y - secondMarketPosition.y, 2));
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// We calculate gain as square of distance to encourage trading between remote markets
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gain.traderGain = Math.pow(distance * DISTANCE_FACTOR, 2);
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if (template && template.GainMultiplier)
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gain.traderGain *= template.GainMultiplier;
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gain.traderGain = Math.round(gain.traderGain);
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// If trader undefined, the trader owner is supposed to be the same as the first market
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if (trader)
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var cmpOwnership = Engine.QueryInterface(trader, IID_Ownership);
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else
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var cmpOwnership = Engine.QueryInterface(firstMarket, IID_Ownership);
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gain.traderOwner = cmpOwnership.GetOwner();
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// If markets belong to different players, add gain from international trading
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var ownerFirstMarket = Engine.QueryInterface(firstMarket, IID_Ownership).GetOwner();
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var ownerSecondMarket = Engine.QueryInterface(secondMarket, IID_Ownership).GetOwner();
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if (ownerFirstMarket != ownerSecondMarket)
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{
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var internationalGain1 = ApplyTechModificationsToEntity("Trade/International", INTERNATIONAL_TRADING_ADDITION, firstMarket);
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gain.market1Gain = Math.round(gain.traderGain * internationalGain1 / 100);
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gain.market1Owner = ownerFirstMarket;
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var internationalGain2 = ApplyTechModificationsToEntity("Trade/International", INTERNATIONAL_TRADING_ADDITION, secondMarket);
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gain.market2Gain = Math.round(gain.traderGain * internationalGain2 / 100);
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gain.market2Owner = ownerSecondMarket;
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}
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return gain;
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}
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Engine.RegisterGlobal("CalculateTraderGain", CalculateTraderGain);
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