diff --git a/src/bin/flat/main.rs b/src/bin/flat/main.rs
index 51e5983..86908bb 100644
--- a/src/bin/flat/main.rs
+++ b/src/bin/flat/main.rs
@@ -119,19 +119,16 @@ fn draw_ray_2(gc: &mut Vec<Draw>, space: &Space, base: Vec2, dir: Vec2) {
 			break;
 		}
 		let sub = space.which_subspace(ray.pos);
-		if sub == Boundary {
-			continue;
-		}
+		let ret = match sub {
+			Inner => space.trace_inner(ray),
+			Outer => space.trace_outer(ray),
+			Boundary => continue,
+		};
 		gc.stroke();
 		gc.new_dash_pattern();
 		// gc.dash_length(6.0);
 		gc.new_path();
 		gc.move_to(ray.pos.x, ray.pos.y);
-		let ret = match sub {
-			Inner => space.trace_inner(ray),
-			Outer => space.trace_outer(ray),
-			Boundary => panic!(),
-		};
 		for hit in ret.objects {
 			let obj = space.objs[hit.id as usize];
 			hits.move_to(obj.loc.pos.x, obj.loc.pos.y);