Merge pull request #6 from winipcfg/master

Add new constructor for DefaultPRNG

PoissonGenerator.h

@@ -23,6 +23,7 @@
 // Implementation based on http://devmag.org.za/2009/05/03/poisson-disk-sampling/
 
 /* Versions history:
+ 		1.1.3a		Jun  9, 2016		Update constructor for DefaultPRNG
  *		1.1.3		Mar 10, 2016		Header-only library, no global mutable state
  *		1.1.2		Apr  9, 2015		Output a text file with XY coordinates
  *		1.1.1		May 23, 2014		Initialize PRNG seed, fixed uninitialized fields
@@ -46,14 +47,19 @@ class DefaultPRNG
 {
 public:
 	DefaultPRNG()
-	: m_RD()
-	, m_Gen( m_RD() )
+	: m_Gen( std::random_device()() )
 	, m_Dis( 0.0f, 1.0f )
 	{
 		// prepare PRNG
 		m_Gen.seed( time( nullptr ) );
 	}
 
+	explicit DefaultPRNG( uint32_t seed )
+	: m_Gen( seed )
+	, m_Dis( 0.0f, 1.0f )
+	{
+	}
+
 	float RandomFloat()
 	{
 		return static_cast<float>( m_Dis( m_Gen ) );
@@ -66,7 +72,6 @@ class DefaultPRNG
 	}
 
 private:
-	std::random_device m_RD;
 	std::mt19937 m_Gen;
 	std::uniform_real_distribution<float> m_Dis;
 };