mirror of https://github.com/OpenTTD/OpenTTD.git
44 lines
1.1 KiB
C++
44 lines
1.1 KiB
C++
/** @file demands.h Declaration of demand calculating link graph handler. */
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#ifndef DEMANDS_H
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#define DEMANDS_H
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#include "linkgraphjob_base.h"
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/**
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* Calculate the demands. This class has a state, but is recreated for each
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* call to of DemandHandler::Run.
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*/
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class DemandCalculator {
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public:
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DemandCalculator(LinkGraphJob &job);
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private:
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int32_t base_distance; ///< Base distance for scaling purposes.
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int32_t mod_dist; ///< Distance modifier, determines how much demands decrease with distance.
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int32_t accuracy; ///< Accuracy of the calculation.
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template<class Tscaler>
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void CalcDemand(LinkGraphJob &job, Tscaler scaler);
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};
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/**
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* Stateless, thread safe demand handler. Doesn't do anything but call DemandCalculator.
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*/
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class DemandHandler : public ComponentHandler {
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public:
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/**
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* Call the demand calculator on the given component.
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* @param job Component to calculate the demands for.
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*/
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void Run(LinkGraphJob &job) const override { DemandCalculator c(job); }
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/**
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* Virtual destructor has to be defined because of virtual Run().
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*/
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virtual ~DemandHandler() = default;
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};
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#endif /* DEMANDS_H */
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