worked on nav-mesh

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

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() ?! */