worked on nav-mesh

added dijkstra support for nav mesh
some minor changes to distributions
minor fixes

math/Distributions.h

@@ -11,5 +11,6 @@
 #include "distribution/NormalN.h"
 #include "distribution/Rectangular.h"
 #include "distribution/NormalCDF.h"
+#include "distribution/Const.h"
 
 #endif // DISTRIBUTIONS_H

math/distribution/Const.h

@@ -1,4 +1,28 @@
-#ifndef CONST_H
-#define CONST_H
+#ifndef DISTRIBUTION_CONST_H
+#define DISTRIBUTION_CONST_H
 
-#endif // CONST_H
+
+namespace Distribution {
+
+	/** uniform distribution */
+	template <typename T> class Const {
+
+		const T val;
+
+	public:
+
+		/** ctor */
+		Const(const T val) : val(val) {
+
+		}
+
+		/** get a constant value */
+		T draw() {
+			return val;
+		}
+
+	};
+
+}
+
+#endif // DISTRIBUTION_CONST_H

math/distribution/Normal.h

@@ -25,9 +25,11 @@ namespace Distribution {
 		/** ctor */
 		Normal(const T mu, const T sigma) :
 			mu(mu), sigma(sigma), _a(1.0 / (sigma * std::sqrt(2.0 * M_PI))), gen(RANDOM_SEED), dist(mu,sigma) {
+		}
 
-#warning "analyze issue when coping an existing distribution and using draw() afterwards. this seems to yield issues"
-
+		/** ctor with seed */
+		Normal(const T mu, const T sigma, const uint32_t seed) :
+			mu(mu), sigma(sigma), _a(1.0 / (sigma * std::sqrt(2.0 * M_PI))), gen(seed), dist(mu,sigma) {
 		}
 
 		/** do not allow copy. this will not work as expected for std::normal_distribution when using draw() ?! */

math/distribution/Uniform.h

@@ -27,6 +27,12 @@ namespace Distribution {
 		Uniform(const T min, const T max) : gen(RANDOM_SEED), dist(min, max) {
 
 		}
+
+		/** ctor with seed */
+		Uniform(const T min, const T max, const uint32_t seed) : gen(seed), dist(min, max) {
+
+		}
+
 		/** get a uniformaly distributed random number */
 		T draw() {
 			return dist(gen);