worked on 3d models within map

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

grid/walk/v3/Walker.h

@@ -237,7 +237,7 @@ namespace GW3 {
 
 			Assert::isNot0(walkDist_m, "walking distance must be > 0");
 
-			const GridPoint gpStart = Helper::p3ToGp(params.start);
+			const GridPoint gpStart = grid.toGridPoint(params.start);
 			const Node* startNode = grid.getNodePtrFor(gpStart);
 			if (!startNode) {throw Exception("start node not found!");}