diff --git a/src/model_physics.rs b/src/model_physics.rs
index 38764da..6027ac9 100644
--- a/src/model_physics.rs
+++ b/src/model_physics.rs
@@ -271,6 +271,19 @@ pub struct TransformedMesh<'a>{
 	normal_determinant:Planar64,
 }
 impl TransformedMesh<'_>{
+	pub fn new<'a>(
+		mesh:&'a PhysicsMesh,
+		transform:&'a crate::integer::Planar64Affine3,
+		normal_transform:&'a crate::integer::Planar64Mat3,
+		normal_determinant:Planar64
+		)->TransformedMesh<'a>{
+		TransformedMesh{
+			mesh,
+			transform,
+			normal_transform,
+			normal_determinant,
+		}
+	}
 	pub fn brute_in(&self,body:&crate::physics::Body,time_limit:crate::integer::Time)->Option<(FaceId,crate::integer::Time)>{
 		//check each face
 		let mut best_time=time_limit;
diff --git a/src/physics.rs b/src/physics.rs
index 8c17777..1969b50 100644
--- a/src/physics.rs
+++ b/src/physics.rs
@@ -180,12 +180,12 @@ impl PhysicsModels{
 	//TODO: "statically" verify the maps don't refer to any nonexistant data, if they do delete the references.
 	//then I can make these getter functions unchecked.
 	fn mesh(&self,model_id:usize)->TransformedMesh{
-		TransformedMesh{
-			mesh:&self.meshes[self.models[model_id].mesh_id],
-			transform:&self.models[model_id].transform,
-			normal_transform:&self.models[model_id].normal_transform,
-			normal_determinant:self.models[model_id].normal_determinant,
-		}
+		TransformedMesh::new(
+			&self.meshes[self.models[model_id].mesh_id],
+			&self.models[model_id].transform,
+			&self.models[model_id].normal_transform,
+			self.models[model_id].normal_determinant,
+		)
 	}
 	fn model(&self,model_id:usize)->&PhysicsModel{
 		&self.models[model_id]