cpp/openttd-patchpack/source Changeset - r21082:ebd4e4cd877f

Changeset - r21082:ebd4e4cd877f

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fonsinchen - 10 years ago 2013-12-20 14:57:44
fonsinchen@openttd.org

(svn r26166) -Fix: Scale flows only after mapping to avoid rounding errors.

5 files changed with 42 insertions and 8 deletions:

src/linkgraph/flowmapper.cpp

src/linkgraph/flowmapper.h

src/linkgraph/linkgraphschedule.cpp

src/station_base.h

src/station_cmd.cpp

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src/linkgraph/flowmapper.cpp

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@@ @@ -18,9 +18,6 @@ @@
  */
 void FlowMapper::Run(LinkGraphJob &job) const
+{
 	/* Time the graph has been running without being compressed. */
 	uint runtime = job.JoinDate() - job.Settings().recalc_time - job.LastCompression();
 	for (NodeID node_id = 0; node_id < job.Size(); ++node_id) {
 		Node prev_node = job[node_id];
 		StationID prev = prev_node.Station();
@@ @@ -29,8 +26,6 @@ void FlowMapper::Run(LinkGraphJob &job) @@
 			Path *path = *i;
 			uint flow = path->GetFlow();
 			if (flow == 0) break;
 			/* compress to monthly value */
 			flow = max(1U, flow * 30 / runtime);
 			Node node = job[path->GetNode()];
 			StationID via = node.Station();
 			StationID origin = job[path->GetOrigin()].Station();
@@ @@ -51,7 +46,15 @@ void FlowMapper::Run(LinkGraphJob &job) @@
 	for (NodeID node_id = 0; node_id < job.Size(); ++node_id) {
 		/* Remove local consumption shares marked as invalid. */
 		Node node = job[node_id];
 		node.Flows().FinalizeLocalConsumption(node.Station());
 		FlowStatMap &flows = node.Flows();
 		flows.FinalizeLocalConsumption(node.Station());
 		if (this->scale) {
 			/* Scale by time the graph has been running without being compressed. */
 			uint runtime = job.JoinDate() - job.Settings().recalc_time - job.LastCompression();
 			for (FlowStatMap::iterator i = flows.begin(); i != flows.end(); ++i) {
 				i->second.ScaleToMonthly(runtime);
+			}
+		}
 		/* Clear paths. */
 		PathList &paths = node.Paths();
 		for (PathList::iterator i = paths.begin(); i != paths.end(); ++i) {

src/linkgraph/flowmapper.h

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@@ @@ -23,12 +23,25 @@ @@
  */
 class FlowMapper : public ComponentHandler {
 public:
 	/**
 	 * Create a flow mapper.
 	 * @param scale Whether the flow mapper should scale all flows to monthly
 	 *              values. Only do that on the very last flow mapping.
 	 */
 	FlowMapper(bool scale) : scale(scale) {}
 	virtual void Run(LinkGraphJob &job) const;
 	/**
 	 * Virtual destructor has to be defined because of virtual Run().
 	 */
 	virtual ~FlowMapper() {}
 private:
 	/**
 	 * Whether the flow mapper should scale all flows to monthly values.
 	 */
 	const bool scale;
 };
 #endif /* FLOWMAPPER_H_ */

src/linkgraph/linkgraphschedule.cpp

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@@ @@ -146,9 +146,9 @@ LinkGraphSchedule::LinkGraphSchedule() @@
 	this->handlers[0] = new InitHandler;
 	this->handlers[1] = new DemandHandler;
 	this->handlers[2] = new MCFHandler<MCF1stPass>;
 	this->handlers[3] = new FlowMapper;
+	this->handlers[3] = new FlowMapper(false);
 	this->handlers[4] = new MCFHandler<MCF2ndPass>;
 	this->handlers[5] = new FlowMapper;
+	this->handlers[5] = new FlowMapper(true);
+}
 /**

src/station_base.h

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@@ @@ -79,6 +79,8 @@ public: @@
 	void ReleaseShare(StationID st);
 	void ScaleToMonthly(uint runtime);
 	/**
 	 * Get the actual shares as a const pointer so that they can be iterated
 	 * over.

src/station_cmd.cpp

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@@ @@ -4290,6 +4290,22 @@ void FlowStat::ReleaseShare(StationID st @@
+}
 /**
  * Scale all shares from link graph's runtime to monthly values.
  * @param runtime Time the link graph has been running without compression.
  */
 void FlowStat::ScaleToMonthly(uint runtime)
+{
 	SharesMap new_shares;
 	uint share = 0;
 	for (SharesMap::iterator i = this->shares.begin(); i != this->shares.end(); ++i) {
 		share = max(share + 1, i->first * 30 / runtime);
 		new_shares[share] = i->second;
 		if (this->unrestricted == i->first) this->unrestricted = share;
+	}
 	this->shares.swap(new_shares);
+}
 /**
  * Add some flow from "origin", going via "via".
  * @param origin Origin of the flow.
  * @param via Next hop.

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