fix snapshots in 2d examples

Author: haydenflinner

src_testbed/testbed.rs

@@ -1297,21 +1297,17 @@ 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();

src_testbed/ui.rs

@@ -414,6 +414,7 @@ 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();
@@ -426,7 +427,7 @@ fn serialization_string(timestep_id: usize, physics: &PhysicsState) -> String {
     let js = bincode::serialize(&physics.impulse_joints).unwrap();
     // println!("js: {}", Instant::now() - t);
     let serialization_time = Instant::now() - t;
-    // let hash_bf = md5::compute(&bf);
+    let hash_bf = md5::compute(&bf);
     let hash_nf = md5::compute(&nf);
     let hash_bodies = md5::compute(&bs);
     let hash_colliders = md5::compute(&cs);
@@ -441,8 +442,8 @@ Hashes at frame: {}
 |_ Joints [{:.1}KB]: {}"#,
         serialization_time.as_secs_f64() * 1000.0,
         timestep_id,
-        "<fixme>", // bf.len() as f32 / 1000.0,
-        "<fixme>", // format!("{:?}", hash_bf).split_at(10).0,
+        bf.len() as f32 / 1000.0,
+        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,