Fix some clippy warnings

examples/mvp.rs

@@ -3,6 +3,7 @@
 extern crate nalgebra as na;
 
 use na::{Isometry3, Perspective3, Point3, Vector3};
+use std::f32::consts;
 
 fn main() {
     // Our object is translated along the x axis.
@@ -15,7 +16,7 @@ fn main() {
     let view = Isometry3::look_at_rh(&eye, &target, &Vector3::y());
 
     // A perspective projection.
-    let projection = Perspective3::new(16.0 / 9.0, 3.14 / 2.0, 1.0, 1000.0);
+    let projection = Perspective3::new(16.0 / 9.0, consts::PI / 2.0, 1.0, 1000.0);
 
     // The combination of the model with the view is still an isometry.
     let model_view = view * model;

examples/raw_pointer.rs

@@ -19,6 +19,7 @@ fn main() {
 
     /* Then pass the raw pointers to some graphics API. */
 
+    #[allow(clippy::float_cmp)]
     unsafe {
         assert_eq!(*v_pointer, 1.0);
         assert_eq!(*v_pointer.offset(1), 0.0);

examples/screen_to_view_coords.rs

@@ -3,9 +3,10 @@
 extern crate nalgebra as na;
 
 use na::{Perspective3, Point2, Point3, Unit};
+use std::f32::consts;
 
 fn main() {
-    let projection = Perspective3::new(800.0 / 600.0, 3.14 / 2.0, 1.0, 1000.0);
+    let projection = Perspective3::new(800.0 / 600.0, consts::PI / 2.0, 1.0, 1000.0);
     let screen_point = Point2::new(10.0f32, 20.0);
 
     // Compute two points in clip-space.

examples/transform_conversion.rs

@@ -1,6 +1,7 @@
 extern crate nalgebra as na;
 
 use na::{Isometry2, Similarity2, Vector2};
+use std::f32::consts;
 
 fn main() {
     // Isometry -> Similarity conversion always succeeds.
@@ -8,8 +9,8 @@ fn main() {
     let _: Similarity2<f32> = na::convert(iso);
 
     // Similarity -> Isometry conversion fails if the scaling factor is not 1.0.
-    let sim_without_scaling = Similarity2::new(Vector2::new(1.0f32, 2.0), 3.14, 1.0);
+    let sim_without_scaling = Similarity2::new(Vector2::new(1.0f32, 2.0), consts::PI, 1.0);
-    let sim_with_scaling = Similarity2::new(Vector2::new(1.0f32, 2.0), 3.14, 2.0);
+    let sim_with_scaling = Similarity2::new(Vector2::new(1.0f32, 2.0), consts::PI, 2.0);
 
     let iso_success: Option<Isometry2<f32>> = na::try_convert(sim_without_scaling);
     let iso_fail: Option<Isometry2<f32>> = na::try_convert(sim_with_scaling);

examples/transform_matrix4.rs

@@ -3,6 +3,7 @@ extern crate approx;
 extern crate nalgebra as na;
 
 use na::{Matrix4, Point3, Vector3};
+use std::f32::consts;
 
 fn main() {
     // Create a uniform scaling matrix with scaling factor 2.
@@ -28,7 +29,7 @@ fn main() {
     );
 
     // Create rotation.
-    let rot = Matrix4::from_scaled_axis(&Vector3::x() * 3.14);
+    let rot = Matrix4::from_scaled_axis(Vector3::x() * consts::PI);
     let rot_then_m = m * rot; // Right-multiplication is equivalent to prepending `rot` to `m`.
     let m_then_rot = rot * m; // Left-multiplication is equivalent to appending `rot` to `m`.
 

examples/transformation_pointer.rs

@@ -12,6 +12,7 @@ fn main() {
 
     /* Then pass the raw pointer to some graphics API. */
 
+    #[allow(clippy::float_cmp)]
     unsafe {
         assert_eq!(*iso_pointer, 1.0);
         assert_eq!(*iso_pointer.offset(5), 1.0);

examples/unit_wrapper.rs

@@ -1,3 +1,4 @@
+#![allow(clippy::float_cmp)]
 extern crate nalgebra as na;
 
 use na::{Unit, Vector3};

src/base/edition.rs

@@ -95,9 +95,7 @@ impl<T: Scalar + Zero, R: Dim, C: Dim, S: Storage<T, R, C>> Matrix<T, R, C, S> {
         for (destination, source) in icols.enumerate() {
             // NOTE: this is basically a copy_frow but wrapping the values insnide of MaybeUninit.
             res.column_mut(destination)
-                .zip_apply(&self.column(*source), |out, e| {
+                .zip_apply(&self.column(*source), |out, e| *out = MaybeUninit::new(e));
-                    *out = MaybeUninit::new(e.clone())
-                });
         }
 
         // Safety: res is now fully initialized.
@@ -1094,7 +1092,7 @@ unsafe fn compress_rows<T: Scalar>(
 
     if new_nrows == 0 || ncols == 0 {
         // The output matrix is empty, drop everything.
-        ptr::drop_in_place(data.as_mut());
+        ptr::drop_in_place(data);
         return;
     }
 

src/base/indexing.rs

@@ -1,4 +1,5 @@
 //! Indexing
+#![allow(clippy::reversed_empty_ranges)]
 
 use crate::base::storage::{RawStorage, RawStorageMut};
 use crate::base::{
@@ -43,7 +44,7 @@ impl<D: Dim> DimRange<D> for usize {
 
 #[test]
 fn dimrange_usize() {
-    assert_eq!(DimRange::contained_by(&0, Const::<0>), false);
+    assert!(!DimRange::contained_by(&0, Const::<0>));
     assert!(DimRange::contained_by(&0, Const::<1>));
 }
 
@@ -68,8 +69,8 @@ impl<D: Dim> DimRange<D> for ops::Range<usize> {
 
 #[test]
 fn dimrange_range_usize() {
-    assert_eq!(DimRange::contained_by(&(0..0), Const::<0>), false);
+    assert!(!DimRange::contained_by(&(0..0), Const::<0>));
-    assert_eq!(DimRange::contained_by(&(0..1), Const::<0>), false);
+    assert!(!DimRange::contained_by(&(0..1), Const::<0>));
     assert!(DimRange::contained_by(&(0..1), Const::<1>));
     assert!(DimRange::contained_by(
         &((usize::MAX - 1)..usize::MAX),
@@ -110,8 +111,8 @@ impl<D: Dim> DimRange<D> for ops::RangeFrom<usize> {
 
 #[test]
 fn dimrange_rangefrom_usize() {
-    assert_eq!(DimRange::contained_by(&(0..), Const::<0>), false);
+    assert!(!DimRange::contained_by(&(0..), Const::<0>));
-    assert_eq!(DimRange::contained_by(&(0..), Const::<0>), false);
+    assert!(!DimRange::contained_by(&(0..), Const::<0>));
     assert!(DimRange::contained_by(&(0..), Const::<1>));
     assert!(DimRange::contained_by(
         &((usize::MAX - 1)..),
@@ -204,16 +205,16 @@ impl<D: Dim> DimRange<D> for ops::RangeInclusive<usize> {
 
 #[test]
 fn dimrange_rangeinclusive_usize() {
-    assert_eq!(DimRange::contained_by(&(0..=0), Const::<0>), false);
+    assert!(!DimRange::contained_by(&(0..=0), Const::<0>));
     assert!(DimRange::contained_by(&(0..=0), Const::<1>));
-    assert_eq!(
+    assert!(!DimRange::contained_by(
-        DimRange::contained_by(&(usize::MAX..=usize::MAX), Dynamic::new(usize::MAX)),
+        &(usize::MAX..=usize::MAX),
-        false
+        Dynamic::new(usize::MAX)
-    );
+    ));
-    assert_eq!(
+    assert!(!DimRange::contained_by(
-        DimRange::contained_by(&((usize::MAX - 1)..=usize::MAX), Dynamic::new(usize::MAX)),
+        &((usize::MAX - 1)..=usize::MAX),
-        false
+        Dynamic::new(usize::MAX)
-    );
+    ));
     assert!(DimRange::contained_by(
         &((usize::MAX - 1)..=(usize::MAX - 1)),
         Dynamic::new(usize::MAX)
@@ -255,7 +256,7 @@ impl<D: Dim> DimRange<D> for ops::RangeTo<usize> {
 #[test]
 fn dimrange_rangeto_usize() {
     assert!(DimRange::contained_by(&(..0), Const::<0>));
-    assert_eq!(DimRange::contained_by(&(..1), Const::<0>), false);
+    assert!(!DimRange::contained_by(&(..1), Const::<0>));
     assert!(DimRange::contained_by(&(..0), Const::<1>));
     assert!(DimRange::contained_by(
         &(..(usize::MAX - 1)),
@@ -292,13 +293,13 @@ impl<D: Dim> DimRange<D> for ops::RangeToInclusive<usize> {
 
 #[test]
 fn dimrange_rangetoinclusive_usize() {
-    assert_eq!(DimRange::contained_by(&(..=0), Const::<0>), false);
+    assert!(!DimRange::contained_by(&(..=0), Const::<0>));
-    assert_eq!(DimRange::contained_by(&(..=1), Const::<0>), false);
+    assert!(!DimRange::contained_by(&(..=1), Const::<0>));
     assert!(DimRange::contained_by(&(..=0), Const::<1>));
-    assert_eq!(
+    assert!(!DimRange::contained_by(
-        DimRange::contained_by(&(..=(usize::MAX)), Dynamic::new(usize::MAX)),
+        &(..=(usize::MAX)),
-        false
+        Dynamic::new(usize::MAX)
-    );
+    ));
     assert!(DimRange::contained_by(
         &(..=(usize::MAX - 1)),
         Dynamic::new(usize::MAX)

src/base/matrix.rs

@@ -1777,7 +1777,7 @@ where
         assert!(self.shape() == other.shape());
         self.iter()
             .zip(other.iter())
-            .all(|(a, b)| a.ulps_eq(b, epsilon.clone(), max_ulps.clone()))
+            .all(|(a, b)| a.ulps_eq(b, epsilon.clone(), max_ulps))
     }
 }
 

src/base/min_max.rs

@@ -60,7 +60,7 @@ impl<T: Scalar, R: Dim, C: Dim, S: RawStorage<T, R, C>> Matrix<T, R, C, S> {
         T: SimdPartialOrd + Zero,
     {
         self.fold_with(
-            |e| e.map(|e| e.clone()).unwrap_or_else(T::zero),
+            |e| e.cloned().unwrap_or_else(T::zero),
             |a, b| a.simd_max(b.clone()),
         )
     }
@@ -123,7 +123,7 @@ impl<T: Scalar, R: Dim, C: Dim, S: RawStorage<T, R, C>> Matrix<T, R, C, S> {
         T: SimdPartialOrd + Zero,
     {
         self.fold_with(
-            |e| e.map(|e| e.clone()).unwrap_or_else(T::zero),
+            |e| e.cloned().unwrap_or_else(T::zero),
             |a, b| a.simd_min(b.clone()),
         )
     }

src/base/norm.rs

@@ -434,12 +434,7 @@ impl<T: Scalar, R: Dim, C: Dim, S: StorageMut<T, R, C>> Matrix<T, R, C, S> {
     {
         let n = self.norm();
         let le = n.clone().simd_le(min_norm);
-        self.apply(|e| {
+        self.apply(|e| *e = e.clone().simd_unscale(n.clone()).select(le, e.clone()));
-            *e = e
-                .clone()
-                .simd_unscale(n.clone())
-                .select(le.clone(), e.clone())
-        });
         SimdOption::new(n, le)
     }
 

src/base/uninit.rs

@@ -66,11 +66,11 @@ unsafe impl<T> InitStatus<T> for Uninit {
 
     #[inline(always)]
     unsafe fn assume_init_ref(t: &MaybeUninit<T>) -> &T {
-        std::mem::transmute(t.as_ptr()) // TODO: use t.assume_init_ref()
+        &*t.as_ptr() // TODO: use t.assume_init_ref()
     }
 
     #[inline(always)]
     unsafe fn assume_init_mut(t: &mut MaybeUninit<T>) -> &mut T {
-        std::mem::transmute(t.as_mut_ptr()) // TODO: use t.assume_init_mut()
+        &mut *t.as_mut_ptr() // TODO: use t.assume_init_mut()
     }
 }

src/geometry/dual_quaternion.rs

@@ -353,7 +353,7 @@ impl<T: RealField + UlpsEq<Epsilon = T>> UlpsEq for DualQuaternion<T> {
     fn ulps_eq(&self, other: &Self, epsilon: Self::Epsilon, max_ulps: u32) -> bool {
         self.clone().to_vector().ulps_eq(&other.clone().to_vector(), epsilon.clone(), max_ulps.clone()) ||
         // Account for the double-covering of S², i.e. q = -q.
-        self.clone().to_vector().iter().zip(other.clone().to_vector().iter()).all(|(a, b)| a.ulps_eq(&-b.clone(), epsilon.clone(), max_ulps.clone()))
+        self.clone().to_vector().iter().zip(other.clone().to_vector().iter()).all(|(a, b)| a.ulps_eq(&-b.clone(), epsilon.clone(), max_ulps))
     }
 }
 

src/geometry/orthographic.rs

@@ -175,7 +175,7 @@ impl<T: RealField> Orthographic3<T> {
         );
 
         let half: T = crate::convert(0.5);
-        let width = zfar.clone() * (vfov.clone() * half.clone()).tan();
+        let width = zfar.clone() * (vfov * half.clone()).tan();
         let height = width.clone() / aspect;
 
         Self::new(

src/geometry/quaternion.rs

@@ -1039,9 +1039,9 @@ impl<T: RealField + UlpsEq<Epsilon = T>> UlpsEq for Quaternion<T> {
 
     #[inline]
     fn ulps_eq(&self, other: &Self, epsilon: Self::Epsilon, max_ulps: u32) -> bool {
-        self.as_vector().ulps_eq(other.as_vector(), epsilon.clone(), max_ulps.clone()) ||
+        self.as_vector().ulps_eq(other.as_vector(), epsilon.clone(), max_ulps) ||
         // Account for the double-covering of S², i.e. q = -q.
-        self.as_vector().iter().zip(other.as_vector().iter()).all(|(a, b)| a.ulps_eq(&-b.clone(), epsilon.clone(), max_ulps.clone()))
+        self.as_vector().iter().zip(other.as_vector().iter()).all(|(a, b)| a.ulps_eq(&-b.clone(), epsilon.clone(), max_ulps))
     }
 }
 
@@ -1492,18 +1492,18 @@ where
         let wk = w.clone() * k.clone() * crate::convert(2.0f64);
         let wj = w.clone() * j.clone() * crate::convert(2.0f64);
         let ik = i.clone() * k.clone() * crate::convert(2.0f64);
-        let jk = j.clone() * k.clone() * crate::convert(2.0f64);
+        let jk = j * k * crate::convert(2.0f64);
-        let wi = w.clone() * i.clone() * crate::convert(2.0f64);
+        let wi = w * i * crate::convert(2.0f64);
 
         Rotation::from_matrix_unchecked(Matrix3::new(
             ww.clone() + ii.clone() - jj.clone() - kk.clone(),
             ij.clone() - wk.clone(),
             wj.clone() + ik.clone(),
-            wk.clone() + ij.clone(),
+            wk + ij,
             ww.clone() - ii.clone() + jj.clone() - kk.clone(),
             jk.clone() - wi.clone(),
-            ik.clone() - wj.clone(),
+            ik - wj,
-            wi.clone() + jk.clone(),
+            wi + jk,
             ww - ii - jj + kk,
         ))
     }

src/linalg/determinant.rs

@@ -49,7 +49,7 @@ impl<T: ComplexField, D: DimMin<D, Output = D>, S: Storage<T, D, D>> SquareMatri
                     let m33 = self.get_unchecked((2, 2)).clone();
 
                     let minor_m12_m23 = m22.clone() * m33.clone() - m32.clone() * m23.clone();
-                    let minor_m11_m23 = m21.clone() * m33.clone() - m31.clone() * m23.clone();
+                    let minor_m11_m23 = m21.clone() * m33 - m31.clone() * m23;
                     let minor_m11_m22 = m21 * m32 - m31 * m22;
 
                     m11 * minor_m12_m23 - m12 * minor_m11_m23 + m13 * minor_m11_m22

src/linalg/exp.rs

@@ -510,6 +510,7 @@ where
 #[cfg(test)]
 mod tests {
     #[test]
+    #[allow(clippy::float_cmp)]
     fn one_norm() {
         use crate::Matrix3;
         let m = Matrix3::new(-3.0, 5.0, 7.0, 2.0, 6.0, 4.0, 0.0, 2.0, 8.0);

src/linalg/givens.rs

@@ -47,7 +47,7 @@ impl<T: ComplexField> GivensRotation<T> {
         if denom > eps {
             let norm = sign0.scale(denom.clone());
             let c = mod0 / denom;
-            let s = s.clone() / norm.clone();
+            let s = s / norm.clone();
             Some((Self { c, s }, norm))
         } else {
             None