diff --git a/src/face_crawler.rs b/src/face_crawler.rs
index 5cdc1e1..9faf38a 100644
--- a/src/face_crawler.rs
+++ b/src/face_crawler.rs
@@ -1,18 +1,18 @@
 use crate::physics::Body;
-use crate::model_physics::{FEV,MeshQuery,DirectedEdge,MinkowskiMesh,MinkowskiFace,MinkowskiDirectedEdge,MinkowskiVert};
+use crate::model_physics::{GigaTime,FEV,MeshQuery,DirectedEdge,MinkowskiMesh,MinkowskiFace,MinkowskiDirectedEdge,MinkowskiVert};
 use strafesnet_common::integer::{Time,Fixed,Ratio};
 
 #[derive(Debug)]
 enum Transition<F,E:DirectedEdge,V>{
 	Miss,
-	Next(FEV<F,E,V>,Ratio<Fixed<4,128>,Fixed<4,128>>),
-	Hit(F,Ratio<Fixed<4,128>,Fixed<4,128>>),
+	Next(FEV<F,E,V>,GigaTime),
+	Hit(F,GigaTime),
 }
 
 type MinkowskiFEV=FEV<MinkowskiFace,MinkowskiDirectedEdge,MinkowskiVert>;
 type MinkowskiTransition=Transition<MinkowskiFace,MinkowskiDirectedEdge,MinkowskiVert>;
 
-	fn next_transition(fev:&MinkowskiFEV,body_time:Ratio<Fixed<4,128>,Fixed<4,128>>,mesh:&MinkowskiMesh,body:&Body,mut best_time:Ratio<Fixed<4,128>,Fixed<4,128>>)->MinkowskiTransition{
+	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;
@@ -102,7 +102,7 @@ type MinkowskiTransition=Transition<MinkowskiFace,MinkowskiDirectedEdge,Minkowsk
 	}
 pub enum CrawlResult<F,E:DirectedEdge,V>{
 	Miss(FEV<F,E,V>),
-	Hit(F,Ratio<Fixed<4,128>,Fixed<4,128>>),
+	Hit(F,GigaTime),
 }
 type MinkowskiCrawlResult=CrawlResult<MinkowskiFace,MinkowskiDirectedEdge,MinkowskiVert>;
 pub fn crawl_fev(mut fev:MinkowskiFEV,mesh:&MinkowskiMesh,relative_body:&Body,start_time:Time,time_limit:Time)->MinkowskiCrawlResult{