diff --git a/src/face_crawler.rs b/src/face_crawler.rs
index 9faf38a..4fc22d9 100644
--- a/src/face_crawler.rs
+++ b/src/face_crawler.rs
@@ -15,7 +15,7 @@ type MinkowskiTransition=Transition<MinkowskiFace,MinkowskiDirectedEdge,Minkowsk
 	fn next_transition(fev:&MinkowskiFEV,body_time:GigaTime,mesh:&MinkowskiMesh,body:&Body,mut best_time:GigaTime)->MinkowskiTransition{
 		//conflicting derivative means it crosses in the wrong direction.
 		//if the transition time is equal to an already tested transition, do not replace the current best.
-		let mut best_transtition=MinkowskiTransition::Miss;
+		let mut best_transition=MinkowskiTransition::Miss;
 		match fev{
 			&MinkowskiFEV::Face(face_id)=>{
 				//test own face collision time, ignoring roots with zero or conflicting derivative
@@ -27,7 +27,7 @@ type MinkowskiTransition=Transition<MinkowskiFace,MinkowskiDirectedEdge,Minkowsk
 				for dt in Fixed::<4,128>::zeroes2((n.dot(body.position)-d)*2,n.dot(body.velocity)*2,n.dot(body.acceleration)){
 					if body_time.le_ratio(dt)&&dt.lt_ratio(best_time)&&n.dot(body.extrapolated_velocity_ratio_dt(dt)).is_negative(){
 						best_time=dt;
-						best_transtition=MinkowskiTransition::Hit(face_id,dt);
+						best_transition=MinkowskiTransition::Hit(face_id,dt);
 						break;
 					}
 				}
@@ -41,7 +41,7 @@ type MinkowskiTransition=Transition<MinkowskiFace,MinkowskiDirectedEdge,Minkowsk
 					for dt in Fixed::<4,128>::zeroes2(n.dot(body.position*2-(mesh.vert(verts[0])+mesh.vert(verts[1]))).fix_4(),n.dot(body.velocity).fix_4()*2,n.dot(body.acceleration).fix_4()){
 						if body_time.le_ratio(dt)&&dt.lt_ratio(best_time)&&n.dot(body.extrapolated_velocity_ratio_dt(dt)).is_negative(){
 							best_time=dt;
-							best_transtition=MinkowskiTransition::Next(MinkowskiFEV::Edge(directed_edge_id.as_undirected()),dt);
+							best_transition=MinkowskiTransition::Next(MinkowskiFEV::Edge(directed_edge_id.as_undirected()),dt);
 							break;
 						}
 					}
@@ -61,7 +61,7 @@ type MinkowskiTransition=Transition<MinkowskiFace,MinkowskiDirectedEdge,Minkowsk
 					for dt in Fixed::<4,128>::zeroes2(n.dot(delta_pos).fix_4(),n.dot(body.velocity).fix_4()*2,n.dot(body.acceleration).fix_4()){
 						if body_time.le_ratio(dt)&&dt.lt_ratio(best_time)&&n.dot(body.extrapolated_velocity_ratio_dt(dt)).is_negative(){
 							best_time=dt;
-							best_transtition=MinkowskiTransition::Next(MinkowskiFEV::Face(edge_face_id),dt);
+							best_transition=MinkowskiTransition::Next(MinkowskiFEV::Face(edge_face_id),dt);
 							break;
 						}
 					}
@@ -74,7 +74,7 @@ type MinkowskiTransition=Transition<MinkowskiFace,MinkowskiDirectedEdge,Minkowsk
 						if body_time.le_ratio(dt)&&dt.lt_ratio(best_time)&&n.dot(body.extrapolated_velocity_ratio_dt(dt)).is_negative(){
 							let dt=Ratio::new(dt.num.fix_4(),dt.den.fix_4());
 							best_time=dt;
-							best_transtition=MinkowskiTransition::Next(MinkowskiFEV::Vert(vert_id),dt);
+							best_transition=MinkowskiTransition::Next(MinkowskiFEV::Vert(vert_id),dt);
 							break;
 						}
 					}
@@ -90,7 +90,7 @@ type MinkowskiTransition=Transition<MinkowskiFace,MinkowskiDirectedEdge,Minkowsk
 						if body_time.le_ratio(dt)&&dt.lt_ratio(best_time)&&n.dot(body.extrapolated_velocity_ratio_dt(dt)).is_negative(){
 							let dt=Ratio::new(dt.num.fix_4(),dt.den.fix_4());
 							best_time=dt;
-							best_transtition=MinkowskiTransition::Next(MinkowskiFEV::Edge(directed_edge_id.as_undirected()),dt);
+							best_transition=MinkowskiTransition::Next(MinkowskiFEV::Edge(directed_edge_id.as_undirected()),dt);
 							break;
 						}
 					}
@@ -98,7 +98,7 @@ type MinkowskiTransition=Transition<MinkowskiFace,MinkowskiDirectedEdge,Minkowsk
 				//if none:
 			},
 		}
-		best_transtition
+		best_transition
 	}
 pub enum CrawlResult<F,E:DirectedEdge,V>{
 	Miss(FEV<F,E,V>),