Fix all warnings

ray-tracing-core/src/material.rs

@@ -1,5 +1,5 @@
 use crate::prelude::*;
-use std::fmt::Debug;
+use std::{fmt::Debug, ops::Deref};
 
 /// Trait to model bxdf.
 ///
@@ -55,6 +55,20 @@ impl<R: Rng, M: Material<R>> Material<R> for &M {
     }
 }
 
+impl<R: Rng> Material<R> for std::sync::Arc<dyn Material<R>> {
+    fn eval(&self, w_in: Dir3, w_out: Dir3, rng: &mut R) -> Color {
+        self.deref().eval(w_in, w_out, rng)
+    }
+
+    fn sample(&self, w_in: Dir3, rng: &mut R) -> SampleResult {
+        self.deref().sample(w_in, rng)
+    }
+
+    fn pdf(&self, w_in: Dir3, w_out: Dir3) -> Float {
+        self.deref().pdf(w_in, w_out)
+    }
+}
+
 #[derive(Debug)]
 pub struct SampleResult {
     w_out: Dir3,

ray-tracing-core/src/math/pos3.rs

@@ -1,6 +1,6 @@
 use crate::prelude::*;
 use core::panic;
-use std::ops::{Add, Index, Mul, Sub};
+use std::ops::{Add, Index, Sub};
 
 #[derive(Debug, Clone, Copy)]
 pub struct Pos3 {