Bugfix for mobility model speed distribution.

Assert the (minimum) speed value is always equal or larger than zero.
Correct boundary setting for gaussian distribution.

src/de/tud/kom/p2psim/impl/topology/movement/distributions/GaussianSpeedDistribution.java

@@ -47,8 +47,9 @@ public class GaussianSpeedDistribution implements ISpeedDistributionProvider {
 	@Override
 	public double calculateSpeed() {		
 		double speed = random.nextGaussian() * std + mean;		
-		Math.min(speed, max);
-		Math.max(speed,  min);		
+		speed = Math.min(speed, max);
+		speed = Math.max(speed,  min);		
+				
 		return speed;		
 	}
 
@@ -61,6 +62,7 @@ public class GaussianSpeedDistribution implements ISpeedDistributionProvider {
 	}
 
 	public void setMin(double min) {
+		assert min >= 0;
 		this.min = min;
 	}
 

src/de/tud/kom/p2psim/impl/topology/movement/distributions/StaticSpeedDistribution.java

@@ -46,6 +46,7 @@ public class StaticSpeedDistribution implements ISpeedDistributionProvider {
 	}
 	
 	public void setValue(double value) {
+		assert value >= 0;
 		this.value = value;
 	}
 	

src/de/tud/kom/p2psim/impl/topology/movement/distributions/UniformSpeedDistribution.java

@@ -28,7 +28,7 @@ public class UniformSpeedDistribution implements ISpeedDistributionProvider {
 
 	private Random random = Randoms.getRandom(UniformSpeedDistribution.class);
 	
-	private double min;
+	private double min = 0;
 	private double max;
 	
 	private boolean includeUpperBound = false;
@@ -45,10 +45,11 @@ public class UniformSpeedDistribution implements ISpeedDistributionProvider {
 
 	@Override
 	public double calculateSpeed() {
-		return min + random.nextDouble() * (max - min + (includeUpperBound ? Double.MIN_VALUE : 0));
+		return Math.max(min, min + random.nextDouble() * (max - min + (includeUpperBound ? Double.MIN_VALUE : 0)));
 	}	
 
 	public void setMin(double min) {
+		assert min >= 0;
 		this.min = min;
 	}