Add serialize feature

Author: Jondolf

Cargo.toml

@@ -4,16 +4,25 @@ version = "0.1.0"
 edition = "2021"
 license = "MIT OR Apache-2.0"
 authors = ["Joona Aalto <jondolf.dev@gmail.com>"]
-description = "A general-purpose transform interpolation plugin for fixed timesteps for the Bevy game engine"
+description = "Transform interpolation for fixed timesteps for the Bevy game engine"
 documentation = "https://docs.rs/bevy_transform_interpolation"
 repository = "https://github.com/Jondolf/bevy_transform_interpolation"
 readme = "README.md"
 keywords = ["gamedev", "easing", "bevy"]
 categories = ["game-development"]
 
+[features]
+default = []
+
+# Enable data serialization/deserialization using `serde`.
+serialize = ["dep:serde", "bevy/serialize"]
+
 [dependencies]
 bevy = { version = "0.15", default-features = false }
 
+# Serialization
+serde = { version = "1.0", default-features = false, optional = true }
+
 [dev-dependencies]
 bevy = { version = "0.15", default-features = false, features = [
     "bevy_core_pipeline",

src/lib.rs

@@ -419,6 +419,8 @@ impl VelocitySource for () {
 /// On its own, this component is not updated automatically. Enable an easing backend
 /// such as the [`TransformInterpolationPlugin`] to perform automatic interpolation.
 #[derive(Component, Clone, Copy, Debug, Default, PartialEq, Reflect)]
+#[cfg_attr(feature = "serialize", derive(serde::Serialize, serde::Deserialize))]
+#[cfg_attr(feature = "serialize", reflect(Serialize, Deserialize))]
 #[reflect(Component, Debug, Default)]
 pub struct TranslationEasingState {
     /// The start translation for the interpolation.
@@ -433,6 +435,8 @@ pub struct TranslationEasingState {
 /// On its own, this component is not updated automatically. Enable an easing backend
 /// such as the [`TransformInterpolationPlugin`] to perform automatic interpolation.
 #[derive(Component, Clone, Copy, Debug, Default, PartialEq, Reflect)]
+#[cfg_attr(feature = "serialize", derive(serde::Serialize, serde::Deserialize))]
+#[cfg_attr(feature = "serialize", reflect(Serialize, Deserialize))]
 #[reflect(Component, Debug, Default)]
 pub struct RotationEasingState {
     /// The start rotation for the interpolation.
@@ -447,6 +451,8 @@ pub struct RotationEasingState {
 /// On its own, this component is not updated automatically. Enable an easing backend
 /// such as the [`TransformInterpolationPlugin`] to perform automatic interpolation.
 #[derive(Component, Clone, Copy, Debug, Default, PartialEq, Reflect)]
+#[cfg_attr(feature = "serialize", derive(serde::Serialize, serde::Deserialize))]
+#[cfg_attr(feature = "serialize", reflect(Serialize, Deserialize))]
 #[reflect(Component, Debug, Default)]
 pub struct ScaleEasingState {
     /// The start scale for the interpolation.