git.gag.com Git - debian/openrocket/blob - src/net/sf/openrocket/optimization/rocketoptimization/parameters/LandingDistanceParameter.java

   1 package net.sf.openrocket.optimization.rocketoptimization.parameters;
   2
   3 import net.sf.openrocket.document.Simulation;
   4 import net.sf.openrocket.l10n.Translator;
   5 import net.sf.openrocket.logging.LogHelper;
   6 import net.sf.openrocket.optimization.general.OptimizationException;
   7 import net.sf.openrocket.optimization.rocketoptimization.OptimizableParameter;
   8 import net.sf.openrocket.simulation.FlightDataType;
   9 import net.sf.openrocket.simulation.exception.MotorIgnitionException;
  10 import net.sf.openrocket.simulation.exception.SimulationException;
  11 import net.sf.openrocket.simulation.exception.SimulationLaunchException;
  12 import net.sf.openrocket.startup.Application;
  13 import net.sf.openrocket.unit.UnitGroup;
  14
  15 /**
  16  * An optimization parameter that computes the distance where a rocket lands.
  17  *
  18  * @author Sampo Niskanen <sampo.niskanen@iki.fi>
  19  */
  20 public class LandingDistanceParameter implements OptimizableParameter {
  21
  22         private static final LogHelper log = Application.getLogger();
  23         private static final Translator trans = Application.getTranslator();
  24
  25         @Override
  26         public String getName() {
  27                 return trans.get("name");
  28         }
  29
  30         @Override
  31         public double computeValue(Simulation simulation) throws OptimizationException {
  32                 try {
  33                         log.debug("Running simulation to evaluate rocket landing distance");
  34                         simulation.simulate();
  35                         double value = simulation.getSimulatedData().getBranch(0).getLast(FlightDataType.TYPE_POSITION_XY);
  36                         log.debug("Landing distance was " + value);
  37                         return value;
  38                 } catch (MotorIgnitionException e) {
  39                         // A problem with motor ignition will cause optimization to fail
  40                         throw new OptimizationException(e);
  41                 } catch (SimulationLaunchException e) {
  42                         // Other launch exceptions result in zero altitude
  43                         return Double.NaN;
  44                 } catch (SimulationException e) {
  45                         // Other exceptions fail
  46                         throw new OptimizationException(e);
  47                 }
  48         }
  49
  50         @Override
  51         public UnitGroup getUnitGroup() {
  52                 return UnitGroup.UNITS_DISTANCE;
  53         }
  54
  55 }