Fix the implementation of `ToHomogeneous` for `Iso*`.

src/structs/iso.rs

@@ -61,9 +61,9 @@ impl<N: Clone + Float> Iso3<N> {
     ///   aligned with.
     ///   * up - Vector pointing up. The only requirement of this parameter is to not be colinear
     ///   with `at`. Non-colinearity is not checked.
-    pub fn look_at(&mut self, eye: &Vec3<N>, at: &Vec3<N>, up: &Vec3<N>) {
+    pub fn look_at(&mut self, eye: &Pnt3<N>, at: &Pnt3<N>, up: &Vec3<N>) {
         self.rotation.look_at(&(*at - *eye), up);
-        self.translation = eye.clone();
+        self.translation = eye.as_vec().clone();
     }
 
     /// Reorient and translate this transformation such that its local `z` axis points to a given
@@ -75,9 +75,9 @@ impl<N: Clone + Float> Iso3<N> {
     ///   aligned with
     ///   * up - Vector pointing `up`. The only requirement of this parameter is to not be colinear
     ///   with `at`. Non-colinearity is not checked.
-    pub fn look_at_z(&mut self, eye: &Vec3<N>, at: &Vec3<N>, up: &Vec3<N>) {
+    pub fn look_at_z(&mut self, eye: &Pnt3<N>, at: &Pnt3<N>, up: &Vec3<N>) {
         self.rotation.look_at_z(&(*at - *eye), up);
-        self.translation = eye.clone();
+        self.translation = eye.as_vec().clone();
     }
 }
 

src/structs/iso_macros.rs

@@ -358,7 +358,7 @@ macro_rules! to_homogeneous_impl(
                 // copy the translation
                 let dim = Dim::dim(None::<$th<N>>);
 
-                res.set_col(dim - 1, ToHomogeneous::to_homogeneous(&m.translation));
+                res.set_col(dim - 1, ToHomogeneous::to_homogeneous(m.translation.as_pnt()).to_vec());
 
                 res
             }