Move load_obj() into submudule

src/mesh.rs

@@ -1,19 +1,15 @@
-use nalgebra::{convert, Point3, RealField, Vector2, Vector3};
-use obj::{IndexTuple, Obj, SimplePolygon};
+use nalgebra::{Point3, RealField, Vector2, Vector3};
 
 use super::materials::Material;
 use super::raycasting::{Intersect, IntersectionInfo, Ray};
 
-use alga::general::SupersetOf;
-use std::io::Result;
-use std::path::Path;
 use std::sync::Arc;
 
 #[derive(Debug)]
 pub struct Triangle<T: RealField> {
     pub vertices: [Point3<T>; 3],
     pub normals: [Vector3<T>; 3],
-    pub material: Arc<dyn Material<T> >,
+    pub material: Arc<dyn Material<T>>,
 }
 
 impl<T: RealField> Intersect<T> for Triangle<T> {
@@ -81,14 +77,27 @@ impl<T: RealField> Intersect<T> for Triangle<T> {
     }
 }
 
-fn get_vertex_and_normal<T: RealField>(
+mod wavefront_obj {
+    use crate::materials::Material;
+
+    use super::Triangle;
+
+    use alga::general::SupersetOf;
+    use nalgebra::{convert, Point3, RealField, Vector3};
+    use obj::{IndexTuple, Obj, SimplePolygon};
+
+    use std::io::Result;
+    use std::path::Path;
+    use std::sync::Arc;
+
+    fn get_vertex_and_normal<T: RealField>(
         index_tuple: &IndexTuple,
         vertex_positions: &Vec<[f32; 3]>,
         normal_positions: &Vec<[f32; 3]>,
-) -> (Point3<T>, Vector3<T>)
-where
+    ) -> (Point3<T>, Vector3<T>)
+    where
         T: SupersetOf<f32>,
-{
+    {
         let &IndexTuple(vertex_index, _, maybe_normal_index) = index_tuple;
         let vertex: Point3<T> = convert(Point3::from_slice(&vertex_positions[vertex_index]));
         let normal = match maybe_normal_index {
@@ -96,17 +105,17 @@ where
             None => Vector3::zeros(),
         };
         (vertex, normal)
-}
+    }
 
-fn get_triangles<T: RealField>(
+    fn get_triangles<T: RealField>(
         polygon: &SimplePolygon,
         vertex_positions: &Vec<[f32; 3]>,
         normal_positions: &Vec<[f32; 3]>,
         material: Arc<dyn Material<T>>,
-) -> Vec<Triangle<T>>
-where
+    ) -> Vec<Triangle<T>>
+    where
         T: SupersetOf<f32>,
-{
+    {
         if let Some(v0_index) = polygon.iter().next() {
             let (v0_vertex, v0_normal) =
                 get_vertex_and_normal(v0_index, &vertex_positions, &normal_positions);
@@ -131,15 +140,15 @@ where
         } else {
             vec![]
         }
-}
+    }
 
-pub fn load_obj<T: RealField>(
+    pub fn load_obj<T: RealField>(
         filename: &Path,
         material: Arc<dyn Material<T>>,
-) -> Result<Vec<Triangle<T>>>
-where
+    ) -> Result<Vec<Triangle<T>>>
+    where
         T: SupersetOf<f32>,
-{
+    {
         let obj = Obj::<SimplePolygon>::load(filename)?;
 
         Ok(obj
@@ -149,8 +158,11 @@ where
             .flat_map(|group| group.polys.iter())
             .flat_map(|poly| get_triangles(poly, &obj.position, &obj.normal, material.clone()))
             .collect())
+    }
 }
 
+pub use wavefront_obj::load_obj;
+
 fn indices_with_index_of_largest_element_last<T: RealField>(v: &Vector3<T>) -> [usize; 3] {
     if v.x > v.y {
         if v.z > v.x {