X-Git-Url: https://git.gag.com/?a=blobdiff_plain;f=src%2Fnet%2Fsf%2Fopenrocket%2Fsimulation%2FRK4SimulationStepper.java;h=8d5e27dbf94264479d1d27bea78074e420a57e0a;hb=8320c04afa30e2aa0150adc870d02abeedb01066;hp=99fd475e9197ccd1c04704b2269b446a2645bbbb;hpb=6460090e9ec07b12234369583032d02d7c5ed3b1;p=debian%2Fopenrocket

diff --git a/src/net/sf/openrocket/simulation/RK4SimulationStepper.java b/src/net/sf/openrocket/simulation/RK4SimulationStepper.java
index 99fd475e..8d5e27db 100644
--- a/src/net/sf/openrocket/simulation/RK4SimulationStepper.java
+++ b/src/net/sf/openrocket/simulation/RK4SimulationStepper.java
@@ -21,6 +21,9 @@ public class RK4SimulationStepper extends AbstractSimulationStepper {
 	
 	private static final LogHelper log = Application.getLogger();
 	
+	/** Random value with which to XOR the random seed value */
+	private static final int SEED_RANDOMIZATION = 0x23E3A01F;
+	
 
 	/**
 	 * A recommended reasonably accurate time step.
@@ -50,8 +53,7 @@ public class RK4SimulationStepper extends AbstractSimulationStepper {
 	private static final double MIN_TIME_STEP = 0.001;
 	
 
-	// TODO: HIGH: Randomness source from simulation
-	private final Random random = new Random();
+	private Random random;
 	
 	
 
@@ -59,8 +61,6 @@ public class RK4SimulationStepper extends AbstractSimulationStepper {
 	@Override
 	public RK4SimulationStatus initialize(SimulationStatus original) {
 		
-		log.info("Performing RK4SimulationStepper initialization");
-		
 		RK4SimulationStatus status = new RK4SimulationStatus();
 		
 		status.copyFrom(original);
@@ -72,6 +72,8 @@ public class RK4SimulationStepper extends AbstractSimulationStepper {
 				Math.cos(sim.getLaunchRodAngle())
 				));
 		
+		this.random = new Random(original.getSimulationConditions().getRandomSeed() ^ SEED_RANDOMIZATION);
+		
 		return status;
 	}