diff --git a/src/bin/flat.rs b/src/bin/flat.rs
index ab345b6..597b29f 100644
--- a/src/bin/flat.rs
+++ b/src/bin/flat.rs
@@ -130,10 +130,6 @@ mod riemann {
 		}
 	}
 
-	fn trace(space: &impl Metric, base: Vec2, dir: Vec2, distance: f32, dt: f32) -> Vec<Vec2> {
-		trace_iter(space, base, dir, dt).take((distance / dt) as usize).collect()
-	}
-
 	pub fn trace_iter<M: Metric>(space: &M, base: Vec2, dir: Vec2, dt: f32) -> TraceIter<M> {
 		TraceIter {
 			space,
@@ -143,30 +139,6 @@ mod riemann {
 		}
 	}
 
-	#[cfg(test)]
-	mod test {
-		use glm::*;
-		use crate::riemann::{trace, trace_iter};
-		use crate::Coil;
-
-		#[test]
-		fn t_iter() {
-			let space = Coil {
-				coil_scale: 2.0,
-				coil_r: 300.0,
-				coil_w: 50.0,
-				coil_m: 10.0,
-			};
-			let base = vec2(-500.0, 0.0);
-			let dir = vec2(1.0, 0.3);
-			let dt = 1.0;
-			let steps = 1000;
-			let a = trace(&space, base, dir, dt * (steps as f32), dt);
-			let b: Vec<Vec2> = trace_iter(&space, base, dir, dt).take(steps).collect();
-			assert_eq!(a, b);
-		}
-	}
-
 	fn krist(space: &impl Metric, pos: Vec2) -> Tens2 {
 		// Γ^i_k_l = .5 * g^i^m * (g_m_k,l + g_m_l,k - g_k_l,m)
 		let g = inverse(&space.metric(pos)); // с верхними индексами