worked on 3d models within map

adjusted grid factory
adjusted nav mesh factory
minoor changes/fixes
new helper classes
refactoring

math/distribution/Normal.h

@@ -17,7 +17,7 @@ namespace Distribution {
 		const T sigma;
 		const T _a;
 
-        Random::RandomGenerator gen;
+		Random::RandomGenerator gen;
 		std::normal_distribution<T> dist;
 
 	public:
@@ -32,6 +32,11 @@ namespace Distribution {
 			mu(mu), sigma(sigma), _a(1.0 / (sigma * std::sqrt(2.0 * M_PI))), gen(seed), dist(mu,sigma) {
 		}
 
+		/** mu = 0, sigma = 1 */
+		static Normal unit() {
+			return Normal(0,1);
+		}
+
 		/** do not allow copy. this will not work as expected for std::normal_distribution when using draw() ?! */
 		//Normal(const Normal& o) = delete;
 
@@ -51,15 +56,15 @@ namespace Distribution {
 			gen.seed(seed);
 		}
 
-        /** get the mean value */
-        const T getMu() {
-            return this->mu;
-        }
+		/** get the mean value */
+		const T getMu() {
+			return this->mu;
+		}
 
-        /** get the standard deviation */
-        const T getSigma() {
-            return this->sigma;
-        }
+		/** get the standard deviation */
+		const T getSigma() {
+			return this->sigma;
+		}
 
 		/** get the probability for the given value */
 		static T getProbability(const T mu, const T sigma, const T val) {