Add impl-glam feature

Cargo.toml

@@ -22,12 +22,14 @@ maintenance = { status = "actively-developed" }
 [features]
 default = ["std"]
 impl-cgmath = ["cgmath"]
+impl-glam = ["glam"]
 impl-nalgebra = ["nalgebra", "num-traits", "simba"]
 serialization = ["serde", "serde_derive"]
 std = []
 
 [dependencies]
 cgmath = { version = "0.17", optional = true }
+glam = { version = "0.9", optional = true }
 nalgebra = { version = ">=0.21, <0.23", optional = true }
 num-traits = { version = "0.2", optional = true }
 serde =  { version = "1", optional = true }

README.md

@@ -90,6 +90,9 @@ So here’s a list of currently supported features and how to enable them:
   - **[cgmath](https://crates.io/crates/cgmath) implementors.**
     - Adds some useful implementations of `Interpolate` for some cgmath types.
     - Enable with the `"impl-cgmath"` feature.
+  - **[glam](https://crates.io/crates/glam) implementors.**
+    - Adds some useful implementations of `Interpolate` for some glam types.
+    - Enable with the `"impl-glam"` feature.
   - **[nalgebra](https://crates.io/crates/nalgebra) implementors.**
     - Adds some useful implementations of `Interpolate` for some nalgebra types.
     - Enable with the `"impl-nalgebra"` feature.

src/glam.rs

@@ -0,0 +1,88 @@
+use glam::{Quat, Vec2, Vec3, Vec3A, Vec4};
+
+use crate::interpolate::{
+  cubic_bezier_def, cubic_hermite_def, quadratic_bezier_def, Interpolate, Linear,
+};
+
+macro_rules! impl_interpolate_vec {
+  ($($t:tt)*) => {
+    impl Linear<f32> for $($t)* {
+      #[inline(always)]
+      fn outer_mul(self, t: f32) -> Self {
+        self * t
+      }
+
+      #[inline(always)]
+      fn outer_div(self, t: f32) -> Self {
+        self / t
+      }
+    }
+
+    impl Interpolate<f32> for $($t)* {
+      #[inline(always)]
+      fn lerp(a: Self, b: Self, t: f32) -> Self {
+        a.lerp(b, t)
+      }
+
+      #[inline(always)]
+      fn cubic_hermite(
+        x: (Self, f32),
+        a: (Self, f32),
+        b: (Self, f32),
+        y: (Self, f32),
+        t: f32,
+      ) -> Self {
+        cubic_hermite_def(x, a, b, y, t)
+      }
+
+      #[inline(always)]
+      fn quadratic_bezier(a: Self, u: Self, b: Self, t: f32) -> Self {
+        quadratic_bezier_def(a, u, b, t)
+      }
+
+      #[inline(always)]
+      fn cubic_bezier(a: Self, u: Self, v: Self, b: Self, t: f32) -> Self {
+        cubic_bezier_def(a, u, v, b, t)
+      }
+    }
+  }
+}
+
+impl_interpolate_vec!(Vec2);
+impl_interpolate_vec!(Vec3);
+impl_interpolate_vec!(Vec3A);
+impl_interpolate_vec!(Vec4);
+
+impl Linear<f32> for Quat {
+  #[inline(always)]
+  fn outer_mul(self, t: f32) -> Self {
+    self * t
+  }
+
+  #[inline(always)]
+  fn outer_div(self, t: f32) -> Self {
+    self / t
+  }
+}
+
+impl Interpolate<f32> for Quat {
+  #[inline(always)]
+  fn lerp(a: Self, b: Self, t: f32) -> Self {
+    a.lerp(b, t).normalize()
+  }
+
+  #[inline(always)]
+  fn cubic_hermite(x: (Self, f32), a: (Self, f32), b: (Self, f32), y: (Self, f32), t: f32) -> Self {
+    cubic_hermite_def(x, a, b, y, t)
+  }
+
+  #[inline(always)]
+  fn quadratic_bezier(a: Self, u: Self, b: Self, t: f32) -> Self {
+    quadratic_bezier_def(a, u, b, t)
+  }
+
+  #[inline(always)]
+  fn cubic_bezier(a: Self, u: Self, v: Self, b: Self, t: f32) -> Self {
+    cubic_bezier_def(a, u, v, b, t)
+  }
+}

src/lib.rs

@@ -91,6 +91,9 @@
 //!   - **[cgmath](https://crates.io/crates/cgmath) implementors.**
 //!     - Adds some useful implementations of `Interpolate` for some cgmath types.
 //!     - Enable with the `"impl-cgmath"` feature.
+//!   - **[glam](https://crates.io/crates/glam) implementors.**
+//!     - Adds some useful implementations of `Interpolate` for some glam types.
+//!     - Enable with the `"impl-glam"` feature.
 //!   - **[nalgebra](https://crates.io/crates/nalgebra) implementors.**
 //!     - Adds some useful implementations of `Interpolate` for some nalgebra types.
 //!     - Enable with the `"impl-nalgebra"` feature.
@@ -111,6 +114,8 @@ extern crate alloc;
 
 #[cfg(feature = "impl-cgmath")]
 mod cgmath;
+#[cfg(feature = "impl-glam")]
+mod glam;
 pub mod interpolate;
 pub mod interpolation;
 pub mod iter;