diff --git a/src/model_physics.rs b/src/model_physics.rs
index a291e21..553e5b6 100644
--- a/src/model_physics.rs
+++ b/src/model_physics.rs
@@ -131,6 +131,7 @@ impl EdgePool{
 }
 impl From<&crate::model::IndexedModel> for PhysicsMesh{
 	fn from(indexed_model:&crate::model::IndexedModel)->Self{
+		assert!(indexed_model.unique_pos.len()!=0,"Mesh cannot have 0 vertices");
 		let verts=indexed_model.unique_pos.iter().map(|v|Vert(v.clone())).collect();
 		let mut vert_ref_guys=vec![VertRefGuy::default();indexed_model.unique_pos.len()];
 		let mut edge_pool=EdgePool::default();
@@ -247,8 +248,8 @@ impl TransformedMesh<'_>{
 		}
 	}
 	fn farthest_vert(&self,dir:Planar64Vec3)->VertId{
-		let best_dot=Planar64::MIN;
-		let best_vert;
+		let mut best_dot=Planar64::MIN;
+		let mut best_vert=VertId(0);
 		for (i,vert) in self.mesh.verts.iter().enumerate(){
 			let p=self.transform.transform_point3(vert.0);
 			let d=dir.dot(p);