1 files changed, 2 insertions, 0 deletions
diff --git a/src/lib.rs b/src/lib.rs
index 9346b9e..32e1541 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -166,6 +166,7 @@ pub mod math {
     #[cfg(feature = "dim2")]
     pub type JacobianViewMut<'a, N> = na::MatrixViewMut3xX<'a, N>;
 
+    /// The type of impulse applied for friction constraints.
     #[cfg(feature = "dim2")]
     pub type TangentImpulse<N> = na::Vector1<N>;
 
@@ -198,6 +199,7 @@ pub mod math {
     #[cfg(feature = "dim3")]
     pub type JacobianViewMut<'a, N> = na::MatrixViewMut6xX<'a, N>;
 
+    /// The type of impulse applied for friction constraints.
     #[cfg(feature = "dim3")]
     pub type TangentImpulse<N> = na::Vector2<N>;