add GetMesh() in IInputGeomProvider

src/DotRecast.Recast.Toolset/Geom/DemoInputGeomProvider.cs

@@ -61,6 +61,11 @@ namespace DotRecast.Recast.Toolset.Geom
             _mesh = new RcTriMesh(vertices, faces);
         }
 
+        public RcTriMesh GetMesh()
+        {
+            return _mesh;
+        }
+
         public RcVec3f GetMeshBoundsMin()
         {
             return bmin;

src/DotRecast.Recast/Geom/IInputGeomProvider.cs

@@ -26,6 +26,7 @@ namespace DotRecast.Recast.Geom
 {
     public interface IInputGeomProvider
     {
+        RcTriMesh GetMesh();
         RcVec3f GetMeshBoundsMin();
 
         RcVec3f GetMeshBoundsMax();

src/DotRecast.Recast/Geom/SimpleInputGeomProvider.cs

@@ -81,6 +81,11 @@ namespace DotRecast.Recast.Geom
             _mesh = new RcTriMesh(vertices, faces);
         }
 
+        public RcTriMesh GetMesh()
+        {
+            return _mesh;
+        }
+
         public RcVec3f GetMeshBoundsMin()
         {
             return bmin;