all: s/f32/Float/g now using customer Float alias.

rtchallenge/src/rays.rs

@@ -1,4 +1,4 @@
-use crate::{matrices::Matrix4x4, tuples::Tuple};
+use crate::{matrices::Matrix4x4, tuples::Tuple, Float};
 
 /// Rays have an origin and a direction. This datatype is the 'ray' in 'raytracer'.
 pub struct Ray {
@@ -38,7 +38,7 @@ impl Ray {
     /// assert_eq!(r.position(-1.), Tuple::point(1., 3., 4.));
     /// assert_eq!(r.position(2.5), Tuple::point(4.5, 3., 4.));
     /// ```
-    pub fn position(&self, t: f32) -> Tuple {
+    pub fn position(&self, t: Float) -> Tuple {
         self.origin + self.direction * t
     }