navmesh creation default fixes

fx navmesh scale detection
fill in mission file based .nav file name
account for walkableclimb having more filter weight than walkableslope when it comes to slanted quads generating navmesh data

Engine/source/navigation/navMesh.cpp

@@ -195,9 +195,9 @@ NavMesh::NavMesh()
 
    mCellSize = mCellHeight = 0.2f;
    mWalkableHeight = 2.0f;
-   mWalkableClimb = 0.3f;
+   mWalkableClimb = 0.5f;
    mWalkableRadius = 0.5f;
-   mWalkableSlope = 40.0f;
+   mWalkableSlope = 45.0f;
    mBorderSize = 1;
    mDetailSampleDist = 6.0f;
    mDetailSampleMaxError = 1.0f;

Templates/BaseGame/game/tools/navEditor/CreateNewNavMeshDlg.gui

@@ -352,6 +352,7 @@ function CreateNewNavMeshDlg::create(%this)
 
    %mesh = 0;
 
+   %navFileLoc = filePath($Client::MissionFile) @ "/" @ fileBase($Client::MissionFile) @".nav";
    if(MeshMissionBounds.isStateOn())
    {
       if(!isObject(getScene(0)))
@@ -362,14 +363,15 @@ function CreateNewNavMeshDlg::create(%this)
       // Get maximum extents of all objects.
       %box = MissionBoundsExtents(getScene(0));
       %pos = GetBoxCenter(%box);
-      %scale = (GetWord(%box, 3) - GetWord(%box, 0)) / 2 + 5
-         SPC (GetWord(%box, 4) - GetWord(%box, 1)) / 2 + 5
-         SPC (GetWord(%box, 5) - GetWord(%box, 2)) / 2 + 5;
-
+      %scale = (GetWord(%box, 3) - GetWord(%box, 0)) + 1
+         SPC (GetWord(%box, 4) - GetWord(%box, 1))  + 1
+         SPC (GetWord(%box, 5) - GetWord(%box, 2)) + 1;
+         
       %mesh = new NavMesh(%name)
       {
          position = %pos;
          scale = %scale;
+         fileName = %navFileLoc;
       };
    }
    else
@@ -378,6 +380,7 @@ function CreateNewNavMeshDlg::create(%this)
       {
          position = %this-->MeshPosition.getText();
          scale = %this-->MeshScale.getText();
+         fileName = %navFileLoc;
       };
    }
    getScene(0).add(%mesh);