diff --git a/README.md b/README.md
index 34eab4d..d8452c6 100644
--- a/README.md
+++ b/README.md
@@ -13,7 +13,7 @@ Virtual Trackball Orbiting via the Exponential Map
 [Documentation]: https://docs.rs/trackball/badge.svg
 [Downloads]: https://img.shields.io/crates/d/trackball.svg
 [Version]: https://img.shields.io/crates/v/trackball.svg
-[Rust]: https://img.shields.io/badge/rust-stable-brightgreen.svg
+[Rust]: https://img.shields.io/badge/rust-v1.70-brightgreen.svg
 [License]: https://img.shields.io/badge/License-MIT%20OR%20Apache--2.0-blue.svg
 
 This is an alternative trackball technique using exponential map and parallel transport to
diff --git a/RELEASES.md b/RELEASES.md
index 0de1f77..3aa3d11 100644
--- a/RELEASES.md
+++ b/RELEASES.md
@@ -1,3 +1,9 @@
+# Version 0.11.2 (2023-08-16)
+
+  * Make some types `Copy`.
+  * Fix `rkyv` by implementing `Archive` for `Self`.
+  * Enable `rkyv` for `docsrs` again.
+
 # Version 0.11.1 (2023-08-09)
 
   * Fix scale boundary in `Scope::scale()` mode.
diff --git a/src/bound.rs b/src/bound.rs
index f4758f7..33f3d45 100644
--- a/src/bound.rs
+++ b/src/bound.rs
@@ -5,12 +5,8 @@ use nalgebra::{Isometry3, Point3, RealField, UnitQuaternion, Vector3};
 /// Orthogonal boundary conditions implementing [`Clamp`].
 ///
 /// Implements [`Default`] and can be created with `Bound::default()`.
-#[derive(Debug, Clone)]
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
 #[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
-#[cfg_attr(
-	feature = "rkyv",
-	derive(rkyv::Archive, rkyv::Serialize, rkyv::Deserialize)
-)]
 pub struct Bound<N: Copy + RealField> {
 	/// Isometry in world space of bound inversely transforming target and eye positions.
 	pub transform: Isometry3<N>,
@@ -124,3 +120,31 @@ impl<N: Copy + RealField> Clamp<N> for Bound<N> {
 		None
 	}
 }
+
+#[cfg(feature = "rkyv")]
+impl<N: Copy + RealField> rkyv::Archive for Bound<N> {
+	type Archived = Self;
+	type Resolver = ();
+
+	#[inline]
+	#[allow(unsafe_code)]
+	unsafe fn resolve(&self, _: usize, _: Self::Resolver, out: *mut Self::Archived) {
+		out.write(rkyv::to_archived!(*self as Self));
+	}
+}
+
+#[cfg(feature = "rkyv")]
+impl<Ser: rkyv::Fallible + ?Sized, N: Copy + RealField> rkyv::Serialize<Ser> for Bound<N> {
+	#[inline]
+	fn serialize(&self, _: &mut Ser) -> Result<Self::Resolver, Ser::Error> {
+		Ok(())
+	}
+}
+
+#[cfg(feature = "rkyv")]
+impl<De: rkyv::Fallible + ?Sized, N: Copy + RealField> rkyv::Deserialize<Self, De> for Bound<N> {
+	#[inline]
+	fn deserialize(&self, _: &mut De) -> Result<Self, De::Error> {
+		Ok(rkyv::from_archived!(*self))
+	}
+}
diff --git a/src/clamp.rs b/src/clamp.rs
index 2219e6a..66c492c 100644
--- a/src/clamp.rs
+++ b/src/clamp.rs
@@ -66,7 +66,7 @@ pub trait Clamp<N: Copy + RealField>: Send + Sync + Debug + 'static {
 				let pitch_axis = frame.pitch_axis();
 				// Old target position in eye space.
 				let old_target = frame.target() - eye;
-				let mut min_delta = delta.clone();
+				let mut min_delta = *delta;
 				let mut loops = 0;
 				loop {
 					let frame = min_delta.transform(frame);
@@ -133,7 +133,7 @@ pub trait Clamp<N: Copy + RealField>: Send + Sync + Debug + 'static {
 				let old_rot_inverse = frame.view().rotation.inverse();
 				// Old eye position in camera space.
 				let old_eye = old_rot_inverse * (frame.eye() - target);
-				let mut min_delta = delta.clone();
+				let mut min_delta = *delta;
 				let mut loops = 0;
 				loop {
 					let mut bound = false;
@@ -181,7 +181,7 @@ pub trait Clamp<N: Copy + RealField>: Send + Sync + Debug + 'static {
 				let old_target = frame.target();
 				let old_rot_inverse = frame.view().rotation.inverse();
 				let old_eye = frame.eye();
-				let mut min_delta = delta.clone();
+				let mut min_delta = *delta;
 				let mut loops = 0;
 				loop {
 					let frame = min_delta.transform(old_frame);
@@ -212,7 +212,7 @@ pub trait Clamp<N: Copy + RealField>: Send + Sync + Debug + 'static {
 			}
 			&Delta::Scale { mut rat, pos } => {
 				let old_zat = frame.distance();
-				let mut min_delta = delta.clone();
+				let mut min_delta = *delta;
 				let mut loops = 0;
 				loop {
 					let frame = min_delta.transform(frame);
diff --git a/src/delta.rs b/src/delta.rs
index 47a229a..2aa389e 100644
--- a/src/delta.rs
+++ b/src/delta.rs
@@ -3,12 +3,8 @@ use nalgebra::{Point3, RealField, Unit, UnitQuaternion, Vector3};
 use simba::scalar::SubsetOf;
 
 /// Delta transform from initial to final [`Frame`].
-#[derive(Debug, Clone, PartialEq, Eq)]
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
 #[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
-#[cfg_attr(
-	feature = "rkyv",
-	derive(rkyv::Archive, rkyv::Serialize, rkyv::Deserialize)
-)]
 pub enum Delta<N: Copy + RealField> {
 	/// Yields frame as identity transform (default).
 	Frame,
@@ -54,7 +50,7 @@ impl<N: Copy + RealField> Delta<N> {
 	/// Transforms from initial to final frame.
 	#[must_use]
 	pub fn transform(&self, frame: &Frame<N>) -> Frame<N> {
-		let mut frame = frame.clone();
+		let mut frame = *frame;
 		match self {
 			Self::Frame => {}
 			Self::First {
@@ -104,7 +100,7 @@ impl<N: Copy + RealField> Delta<N> {
 	///   * `t`: The interpolation parameter between 0 and 1.
 	#[must_use]
 	pub fn lerp_slerp(&self, t: N) -> Self {
-		match self.clone() {
+		match *self {
 			Self::Frame => Self::Frame,
 			Self::First {
 				pitch,
@@ -161,3 +157,31 @@ impl<N: Copy + RealField> Default for Delta<N> {
 		Self::Frame
 	}
 }
+
+#[cfg(feature = "rkyv")]
+impl<N: Copy + RealField> rkyv::Archive for Delta<N> {
+	type Archived = Self;
+	type Resolver = ();
+
+	#[inline]
+	#[allow(unsafe_code)]
+	unsafe fn resolve(&self, _: usize, _: Self::Resolver, out: *mut Self::Archived) {
+		out.write(rkyv::to_archived!(*self as Self));
+	}
+}
+
+#[cfg(feature = "rkyv")]
+impl<Ser: rkyv::Fallible + ?Sized, N: Copy + RealField> rkyv::Serialize<Ser> for Delta<N> {
+	#[inline]
+	fn serialize(&self, _: &mut Ser) -> Result<Self::Resolver, Ser::Error> {
+		Ok(())
+	}
+}
+
+#[cfg(feature = "rkyv")]
+impl<De: rkyv::Fallible + ?Sized, N: Copy + RealField> rkyv::Deserialize<Self, De> for Delta<N> {
+	#[inline]
+	fn deserialize(&self, _: &mut De) -> Result<Self, De::Error> {
+		Ok(rkyv::from_archived!(*self))
+	}
+}
diff --git a/src/fixed.rs b/src/fixed.rs
index 341071e..62d0002 100644
--- a/src/fixed.rs
+++ b/src/fixed.rs
@@ -6,12 +6,8 @@ use simba::scalar::SubsetOf;
 ///   * Implements [`Default`] and can be created with `Fixed::default()` returning
 ///     `Fixed::Ver(N::frac_pi_4())`.
 ///   * Implements `From<N>` and can be created with `N::into()` returning `Fixed::Ver()`.
-#[derive(Debug, Copy, Clone, PartialEq, Eq)]
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
 #[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
-#[cfg_attr(
-	feature = "rkyv",
-	derive(rkyv::Archive, rkyv::Serialize, rkyv::Deserialize)
-)]
 pub enum Fixed<N: Copy + RealField> {
 	/// Fixed horizontal field of view aka Vert- scaling.
 	Hor(N),
@@ -108,3 +104,31 @@ impl<N: Copy + RealField> Fixed<N> {
 		}
 	}
 }
+
+#[cfg(feature = "rkyv")]
+impl<N: Copy + RealField> rkyv::Archive for Fixed<N> {
+	type Archived = Self;
+	type Resolver = ();
+
+	#[inline]
+	#[allow(unsafe_code)]
+	unsafe fn resolve(&self, _: usize, _: Self::Resolver, out: *mut Self::Archived) {
+		out.write(rkyv::to_archived!(*self as Self));
+	}
+}
+
+#[cfg(feature = "rkyv")]
+impl<Ser: rkyv::Fallible + ?Sized, N: Copy + RealField> rkyv::Serialize<Ser> for Fixed<N> {
+	#[inline]
+	fn serialize(&self, _: &mut Ser) -> Result<Self::Resolver, Ser::Error> {
+		Ok(())
+	}
+}
+
+#[cfg(feature = "rkyv")]
+impl<De: rkyv::Fallible + ?Sized, N: Copy + RealField> rkyv::Deserialize<Self, De> for Fixed<N> {
+	#[inline]
+	fn deserialize(&self, _: &mut De) -> Result<Self, De::Error> {
+		Ok(rkyv::from_archived!(*self))
+	}
+}
diff --git a/src/frame.rs b/src/frame.rs
index 47c09fb..5a835eb 100644
--- a/src/frame.rs
+++ b/src/frame.rs
@@ -3,12 +3,8 @@ use nalgebra::{Isometry3, Point3, RealField, Unit, UnitQuaternion, Vector3};
 use simba::scalar::SubsetOf;
 
 /// Frame wrt camera eye and target.
-#[derive(Debug, Clone, PartialEq, Eq, Default)]
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Default)]
 #[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
-#[cfg_attr(
-	feature = "rkyv",
-	derive(rkyv::Archive, rkyv::Serialize, rkyv::Deserialize)
-)]
 pub struct Frame<N: Copy + RealField> {
 	/// Target position in world space.
 	pos: Point3<N>,
@@ -248,3 +244,31 @@ where
 			&& self.zat.ulps_eq(&other.zat, epsilon, max_ulps)
 	}
 }
+
+#[cfg(feature = "rkyv")]
+impl<N: Copy + RealField> rkyv::Archive for Frame<N> {
+	type Archived = Self;
+	type Resolver = ();
+
+	#[inline]
+	#[allow(unsafe_code)]
+	unsafe fn resolve(&self, _: usize, _: Self::Resolver, out: *mut Self::Archived) {
+		out.write(rkyv::to_archived!(*self as Self));
+	}
+}
+
+#[cfg(feature = "rkyv")]
+impl<Ser: rkyv::Fallible + ?Sized, N: Copy + RealField> rkyv::Serialize<Ser> for Frame<N> {
+	#[inline]
+	fn serialize(&self, _: &mut Ser) -> Result<Self::Resolver, Ser::Error> {
+		Ok(())
+	}
+}
+
+#[cfg(feature = "rkyv")]
+impl<De: rkyv::Fallible + ?Sized, N: Copy + RealField> rkyv::Deserialize<Self, De> for Frame<N> {
+	#[inline]
+	fn deserialize(&self, _: &mut De) -> Result<Self, De::Error> {
+		Ok(rkyv::from_archived!(*self))
+	}
+}
diff --git a/src/image.rs b/src/image.rs
index a0e8a0a..b629aba 100644
--- a/src/image.rs
+++ b/src/image.rs
@@ -3,12 +3,8 @@ use nalgebra::{convert, zero, Isometry3, Matrix4, Point2, Point3, RealField, Vec
 use simba::scalar::SubsetOf;
 
 /// Image as projection of [`Scope`] wrt [`Frame`].
-#[derive(Debug, Clone)]
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
 #[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
-#[cfg_attr(
-	feature = "rkyv",
-	derive(rkyv::Archive, rkyv::Serialize, rkyv::Deserialize)
-)]
 pub struct Image<N: Copy + RealField> {
 	/// Current position in screen space of hovering input or pointing device.
 	pos: Point2<N>,
@@ -44,8 +40,8 @@ impl<N: Copy + RealField> Image<N> {
 			pos: Point2::origin(),
 			max,
 			upp: zero(),
-			frame: frame.clone(),
-			scope: scope.clone(),
+			frame: *frame,
+			scope: *scope,
 			view_iso: Isometry3::identity(),
 			view_mat: zero(),
 			proj_mat: zero(),
@@ -236,3 +232,31 @@ impl<N: Copy + RealField> Image<N> {
 		}
 	}
 }
+
+#[cfg(feature = "rkyv")]
+impl<N: Copy + RealField> rkyv::Archive for Image<N> {
+	type Archived = Self;
+	type Resolver = ();
+
+	#[inline]
+	#[allow(unsafe_code)]
+	unsafe fn resolve(&self, _: usize, _: Self::Resolver, out: *mut Self::Archived) {
+		out.write(rkyv::to_archived!(*self as Self));
+	}
+}
+
+#[cfg(feature = "rkyv")]
+impl<Ser: rkyv::Fallible + ?Sized, N: Copy + RealField> rkyv::Serialize<Ser> for Image<N> {
+	#[inline]
+	fn serialize(&self, _: &mut Ser) -> Result<Self::Resolver, Ser::Error> {
+		Ok(())
+	}
+}
+
+#[cfg(feature = "rkyv")]
+impl<De: rkyv::Fallible + ?Sized, N: Copy + RealField> rkyv::Deserialize<Self, De> for Image<N> {
+	#[inline]
+	fn deserialize(&self, _: &mut De) -> Result<Self, De::Error> {
+		Ok(rkyv::from_archived!(*self))
+	}
+}
diff --git a/src/lib.rs b/src/lib.rs
index e922243..f324cf3 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -69,6 +69,8 @@
 //! }
 //! ```
 
+#![cfg_attr(any(feature = "rkyv", feature = "cc"), deny(unsafe_code))]
+#![cfg_attr(not(any(feature = "rkyv", feature = "cc")), forbid(unsafe_code))]
 #![cfg_attr(docsrs, feature(doc_auto_cfg))]
 #![forbid(missing_docs)]
 #![deny(rustdoc::broken_intra_doc_links)]
diff --git a/src/orbit.rs b/src/orbit.rs
index 556d6a2..9f5d24f 100644
--- a/src/orbit.rs
+++ b/src/orbit.rs
@@ -125,6 +125,7 @@ impl Orbit<f32> {
 			.vec
 			.map(|(ray, len)| ray.into_inner().push(len))
 			.unwrap_or_default();
+		#[allow(unsafe_code)]
 		unsafe {
 			trackball_orbit_f(
 				rot.as_vector_mut().as_mut_ptr(),
@@ -182,6 +183,7 @@ impl Orbit<f64> {
 			.vec
 			.map(|(ray, len)| ray.into_inner().push(len))
 			.unwrap_or_default();
+		#[allow(unsafe_code)]
 		unsafe {
 			trackball_orbit_d(
 				rot.as_vector_mut().as_mut_ptr(),
diff --git a/src/plane.rs b/src/plane.rs
index 00eabd2..325d068 100644
--- a/src/plane.rs
+++ b/src/plane.rs
@@ -7,10 +7,6 @@ use simba::scalar::SubsetOf;
 /// Realizes plane equation `a*x+b*y+c*z+d=0` with unit normal `[x, y, z]` and signed bias `d`.
 #[derive(Debug, Clone, Copy, PartialEq, Eq)]
 #[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
-#[cfg_attr(
-	feature = "rkyv",
-	derive(rkyv::Archive, rkyv::Serialize, rkyv::Deserialize)
-)]
 #[repr(C)]
 pub struct Plane<N: Copy + RealField> {
 	/// Plane unit normal.
@@ -212,3 +208,31 @@ where
 			&& self.bias.ulps_eq(&other.bias, epsilon, max_ulps)
 	}
 }
+
+#[cfg(feature = "rkyv")]
+impl<N: Copy + RealField> rkyv::Archive for Plane<N> {
+	type Archived = Self;
+	type Resolver = ();
+
+	#[inline]
+	#[allow(unsafe_code)]
+	unsafe fn resolve(&self, _: usize, _: Self::Resolver, out: *mut Self::Archived) {
+		out.write(rkyv::to_archived!(*self as Self));
+	}
+}
+
+#[cfg(feature = "rkyv")]
+impl<Ser: rkyv::Fallible + ?Sized, N: Copy + RealField> rkyv::Serialize<Ser> for Plane<N> {
+	#[inline]
+	fn serialize(&self, _: &mut Ser) -> Result<Self::Resolver, Ser::Error> {
+		Ok(())
+	}
+}
+
+#[cfg(feature = "rkyv")]
+impl<De: rkyv::Fallible + ?Sized, N: Copy + RealField> rkyv::Deserialize<Self, De> for Plane<N> {
+	#[inline]
+	fn deserialize(&self, _: &mut De) -> Result<Self, De::Error> {
+		Ok(rkyv::from_archived!(*self))
+	}
+}
diff --git a/src/scope.rs b/src/scope.rs
index c6dae82..d9d3f5f 100644
--- a/src/scope.rs
+++ b/src/scope.rs
@@ -5,12 +5,8 @@ use simba::scalar::SubsetOf;
 /// Scope defining enclosing viewing frustum.
 ///
 /// Implements [`Default`] and can be created with `Scope::default()`.
-#[derive(Debug, Clone, PartialEq, Eq)]
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
 #[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
-#[cfg_attr(
-	feature = "rkyv",
-	derive(rkyv::Archive, rkyv::Serialize, rkyv::Deserialize)
-)]
 pub struct Scope<N: Copy + RealField> {
 	/// Fixed quantity wrt field of view.
 	///
@@ -149,3 +145,31 @@ impl<N: Copy + RealField> Scope<N> {
 		}
 	}
 }
+
+#[cfg(feature = "rkyv")]
+impl<N: Copy + RealField> rkyv::Archive for Scope<N> {
+	type Archived = Self;
+	type Resolver = ();
+
+	#[inline]
+	#[allow(unsafe_code)]
+	unsafe fn resolve(&self, _: usize, _: Self::Resolver, out: *mut Self::Archived) {
+		out.write(rkyv::to_archived!(*self as Self));
+	}
+}
+
+#[cfg(feature = "rkyv")]
+impl<Ser: rkyv::Fallible + ?Sized, N: Copy + RealField> rkyv::Serialize<Ser> for Scope<N> {
+	#[inline]
+	fn serialize(&self, _: &mut Ser) -> Result<Self::Resolver, Ser::Error> {
+		Ok(())
+	}
+}
+
+#[cfg(feature = "rkyv")]
+impl<De: rkyv::Fallible + ?Sized, N: Copy + RealField> rkyv::Deserialize<Self, De> for Scope<N> {
+	#[inline]
+	fn deserialize(&self, _: &mut De) -> Result<Self, De::Error> {
+		Ok(rkyv::from_archived!(*self))
+	}
+}