From 604e32080a4798bcff1062e73e143896b8a4e6e6 Mon Sep 17 00:00:00 2001
From: Hayden Flinner <haydenflinner@gmail.com>
Date: Sat, 30 Aug 2025 17:03:41 -0400
Subject: [PATCH 1/2] fix snapshots in 2d examples

---
 src_testbed/testbed.rs | 26 +++++++++++---------------
 src_testbed/ui.rs      |  3 ++-
 2 files changed, 13 insertions(+), 16 deletions(-)

diff --git a/src_testbed/testbed.rs b/src_testbed/testbed.rs
index ed0610180..9f1b3a75c 100644
--- a/src_testbed/testbed.rs
+++ b/src_testbed/testbed.rs
@@ -1248,21 +1248,17 @@ fn update_testbed(
             state
                 .action_flags
                 .set(TestbedActionFlags::TAKE_SNAPSHOT, false);
-            // FIXME
-            println!(
-                "!!!!!!!!! Snapshots are not working any more. Requires broad-phase serialization."
-            );
-            // state.snapshot = PhysicsSnapshot::new(
-            //     harness.state.timestep_id,
-            //     &*harness.physics.broad_phase,
-            //     &harness.physics.narrow_phase,
-            //     &harness.physics.islands,
-            //     &harness.physics.bodies,
-            //     &harness.physics.colliders,
-            //     &harness.physics.impulse_joints,
-            //     &harness.physics.multibody_joints,
-            // )
-            // .ok();
+            state.snapshot = PhysicsSnapshot::new(
+                harness.state.timestep_id,
+                &harness.physics.broad_phase,
+                &harness.physics.narrow_phase,
+                &harness.physics.islands,
+                &harness.physics.bodies,
+                &harness.physics.colliders,
+                &harness.physics.impulse_joints,
+                &harness.physics.multibody_joints,
+            )
+            .ok();
 
             if let Some(snap) = &state.snapshot {
                 snap.print_snapshot_len();
diff --git a/src_testbed/ui.rs b/src_testbed/ui.rs
index c89a0b264..0a66b6ae8 100644
--- a/src_testbed/ui.rs
+++ b/src_testbed/ui.rs
@@ -383,6 +383,7 @@ fn serialization_string(timestep_id: usize, physics: &PhysicsState) -> String {
     let bf = bincode::serialize(&physics.broad_phase).unwrap();
     // println!("bf: {}", Instant::now() - t);
     // let t = Instant::now();
+    let bf = bincode::serialize(&physics.broad_phase).unwrap();
     let nf = bincode::serialize(&physics.narrow_phase).unwrap();
     // println!("nf: {}", Instant::now() - t);
     // let t = Instant::now();
@@ -411,7 +412,7 @@ Hashes at frame: {}
         serialization_time.as_secs_f64() * 1000.0,
         timestep_id,
         bf.len() as f32 / 1000.0,
-        format!("{:?}", hash_bf).split_at(10).0,
+        format!("{hash_bf:?}").split_at(10).0,
         nf.len() as f32 / 1000.0,
         format!("{hash_nf:?}").split_at(10).0,
         bs.len() as f32 / 1000.0,

From a306004de2445e0f955b8568c62724ef2313f712 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?S=C3=A9bastien=20Crozet?= <sebcrozet@dimforge.com>
Date: Fri, 21 Nov 2025 16:37:55 +0100
Subject: [PATCH 2/2] fix duplicate line

---
 src_testbed/ui.rs | 1 -
 1 file changed, 1 deletion(-)

diff --git a/src_testbed/ui.rs b/src_testbed/ui.rs
index 0a66b6ae8..844ae39c0 100644
--- a/src_testbed/ui.rs
+++ b/src_testbed/ui.rs
@@ -383,7 +383,6 @@ fn serialization_string(timestep_id: usize, physics: &PhysicsState) -> String {
     let bf = bincode::serialize(&physics.broad_phase).unwrap();
     // println!("bf: {}", Instant::now() - t);
     // let t = Instant::now();
-    let bf = bincode::serialize(&physics.broad_phase).unwrap();
     let nf = bincode::serialize(&physics.narrow_phase).unwrap();
     // println!("nf: {}", Instant::now() - t);
     // let t = Instant::now();