git.gag.com Git - debian/openrocket/blob - src/net/sf/openrocket/simulation/listeners/StopSimulationListener.java

   1 package net.sf.openrocket.simulation.listeners;
   2
   3 import java.util.Collection;
   4 import java.util.Collections;
   5
   6 import net.sf.openrocket.simulation.FlightEvent;
   7 import net.sf.openrocket.simulation.SimulationStatus;
   8
   9
  10 public class StopSimulationListener extends AbstractSimulationListener {
  11
  12         private final int REPORT = 500;
  13
  14         private final double stopTime;
  15         private final int stopStep;
  16
  17         private int step = 0;
  18
  19         private long startTime = -1;
  20         private long time = -1;
  21
  22         public StopSimulationListener(double t, int n) {
  23                 stopTime = t;
  24                 stopStep = n;
  25         }
  26
  27
  28         @Override
  29         public Collection<FlightEvent> handleEvent(FlightEvent event,
  30                         SimulationStatus status) {
  31
  32                 if (event.getType() == FlightEvent.Type.LAUNCH) {
  33                         System.out.println("Simulation starting.");
  34                         time = System.nanoTime();
  35                         startTime = System.nanoTime();
  36                 }
  37
  38                 return null;
  39         }
  40
  41         @Override
  42         public Collection<FlightEvent> stepTaken(SimulationStatus status) {
  43                 step ++;
  44                 if ((step%REPORT) == 0) {
  45                         long t = System.nanoTime();
  46
  47                         System.out.printf("Step %4d, time=%.3f, took %d us/step (avg. %d us/step)\n",
  48                                         step,status.time,(t-time)/1000/REPORT,(t-startTime)/1000/step);
  49                         time = t;
  50                 }
  51                 if (status.time >= stopTime || step >= stopStep) {
  52                         System.out.printf("Stopping simulation, step=%d time=%.3f\n",step,status.time);
  53                         return Collections.singleton(new FlightEvent(FlightEvent.Type.SIMULATION_END,
  54                                         status.time, null));
  55                 }
  56                 return null;
  57         }
  58
  59 }