diff --git a/src/DotRecast.Detour.TileCache/TileCache.cs b/src/DotRecast.Detour.TileCache/TileCache.cs
index 5efc943..3a18853 100644
--- a/src/DotRecast.Detour.TileCache/TileCache.cs
+++ b/src/DotRecast.Detour.TileCache/TileCache.cs
@@ -358,7 +358,7 @@ namespace DotRecast.Detour.TileCache
         }
 
         // Cylinder obstacle
-        public long addObstacle(float[] pos, float radius, float height)
+        public long addObstacle(Vector3f pos, float radius, float height)
         {
             TileCacheObstacle ob = allocObstacle();
             ob.type = TileCacheObstacle.TileCacheObstacleType.CYLINDER;
@@ -457,7 +457,7 @@ namespace DotRecast.Detour.TileCache
                         CompressedTile tile = m_tiles[decodeTileIdTile(i)];
                         Vector3f tbmin = new Vector3f();
                         Vector3f tbmax = new Vector3f();
-                        calcTightTileBounds(tile.header, tbmin, tbmax);
+                        calcTightTileBounds(tile.header, ref tbmin, ref tbmax);
                         if (overlapBounds(bmin, bmax, tbmin, tbmax))
                         {
                             results.Add(i);
@@ -501,7 +501,7 @@ namespace DotRecast.Detour.TileCache
                         // Find touched tiles.
                         Vector3f bmin = new Vector3f();
                         Vector3f bmax = new Vector3f();
-                        getObstacleBounds(ob, bmin, bmax);
+                        getObstacleBounds(ob, ref bmin, ref bmax);
                         ob.touched = queryTiles(bmin, bmax);
                         // Add tiles to update list.
                         ob.pending.Clear();
@@ -682,7 +682,7 @@ namespace DotRecast.Detour.TileCache
             return layer;
         }
 
-        void calcTightTileBounds(TileCacheLayerHeader header, Vector3f bmin, Vector3f bmax)
+        void calcTightTileBounds(TileCacheLayerHeader header, ref Vector3f bmin, ref Vector3f bmax)
         {
             float cs = m_params.cs;
             bmin[0] = header.bmin[0] + header.minx * cs;
@@ -693,7 +693,7 @@ namespace DotRecast.Detour.TileCache
             bmax[2] = header.bmin[2] + (header.maxy + 1) * cs;
         }
 
-        void getObstacleBounds(TileCacheObstacle ob, Vector3f bmin, Vector3f bmax)
+        void getObstacleBounds(TileCacheObstacle ob, ref Vector3f bmin, ref Vector3f bmax)
         {
             if (ob.type == TileCacheObstacle.TileCacheObstacleType.CYLINDER)
             {
diff --git a/test/DotRecast.Detour.TileCache.Test/TempObstaclesTest.cs b/test/DotRecast.Detour.TileCache.Test/TempObstaclesTest.cs
index e544fc1..29fda75 100644
--- a/test/DotRecast.Detour.TileCache.Test/TempObstaclesTest.cs
+++ b/test/DotRecast.Detour.TileCache.Test/TempObstaclesTest.cs
@@ -46,7 +46,7 @@ public class TempObstaclesTest : AbstractTileCacheTest
         MeshTile tile = tiles[0];
         Assert.That(tile.data.header.vertCount, Is.EqualTo(16));
         Assert.That(tile.data.header.polyCount, Is.EqualTo(6));
-        long o = tc.addObstacle(new float[] { -1.815208f, 9.998184f, -20.307983f }, 1f, 2f);
+        long o = tc.addObstacle(Vector3f.Of(-1.815208f, 9.998184f, -20.307983f), 1f, 2f);
         bool upToDate = tc.update();
         Assert.That(upToDate, Is.True);
         tiles = tc.getNavMesh().getTilesAt(1, 4);