diff --git a/engine/physics/src/minimum_difference.rs b/engine/physics/src/minimum_difference.rs
index d602801b..418a8933 100644
--- a/engine/physics/src/minimum_difference.rs
+++ b/engine/physics/src/minimum_difference.rs
@@ -470,7 +470,7 @@ pub fn contains_point(mesh:&MinkowskiMesh,point:Planar64Vec3)->bool{
 			// local dist = a:Dot(norm)
 			// local hits = -dist < radiusP + radiusQ
 			// return hits
-			mesh.vert(simplex[1]).dot(direction).is_negative()
+			mesh.vert(simplex[1]).dot(direction).is_positive()
 		},
 		// on_escape
 		|_simplex|{