basic serialization example

bevy_rapier2d/Cargo.toml

@@ -66,6 +66,8 @@ rapier2d = { version = "0.21", features = ["serde-serialize"] }
 serde_json = "1.0"
 bevy-inspector-egui = "0.25.1"
 bevy_egui = "0.28.0"
+rapier2d = { version = "0.22", features = ["serde-serialize"] }
+serde_json = "1.0"
 
 [package.metadata.docs.rs]
 # Enable all the features when building the docs on docs.rs

bevy_rapier2d/examples/serialization.rs

@@ -0,0 +1,36 @@
+//! Example for RapierContext serialization, run with `--features serde-serialize`.
+
+use bevy::prelude::*;
+use bevy_rapier2d::prelude::*;
+
+/// Note: This will end up in duplication for testbed, but that's more simple.
+mod joints2;
+
+fn main() {
+    App::new()
+        .insert_resource(ClearColor(Color::srgb(
+            0xF9 as f32 / 255.0,
+            0xF9 as f32 / 255.0,
+            0xFF as f32 / 255.0,
+        )))
+        .add_plugins((
+            DefaultPlugins,
+            RapierPhysicsPlugin::<NoUserData>::pixels_per_meter(100.0),
+            RapierDebugRenderPlugin::default(),
+        ))
+        .add_systems(Startup, (joints2::setup_graphics, joints2::setup_physics))
+        .add_systems(PostUpdate, print_physics)
+        .add_systems(Last, quit)
+        .run();
+}
+
+pub fn print_physics(context: Res<RapierContext>) {
+    println!(
+        "{}",
+        serde_json::to_string_pretty(&(*context)).expect("Unable to serialize `RapierContext`")
+    );
+}
+
+fn quit(mut exit_event: EventWriter<AppExit>) {
+    exit_event.send(AppExit::Success);
+}

src/plugin/context.rs

@@ -32,6 +32,8 @@ pub struct RapierContext {
     /// The island manager, which detects what object is sleeping
     /// (not moving much) to reduce computations.
     pub islands: IslandManager,
+    // FIXME: This shoulnd not be skipped.
+    #[cfg_attr(feature = "serde-serialize", serde(skip))]
     /// The broad-phase, which detects potential contact pairs.
     pub broad_phase: DefaultBroadPhase,
     /// The narrow-phase, which computes contact points, tests intersections,