2 files changed, 41 insertions(+), 0 deletions(-)

A src/hittable_list.rs
M src/main.rs

@@ 0,0 1,38 @@
+use crate::hittable::*;
+use crate::ray::*;
+use crate::vec3::*;
+use std::sync::Arc;
+
+#[derive(Clone)]
+pub struct HittableList {
+    objects: Vec<Arc<dyn Hittable>>,
+}
+
+impl HittableList {
+    fn empty() -> Self {
+        HittableList{ objects: vec![] }
+    }
+
+    fn clear(&mut self) {
+        self.objects.clear();
+    }
+
+    fn add(&mut self, object: &Arc<dyn Hittable>) {
+        self.objects.push(object.clone());
+    }
+}
+
+impl Hittable for HittableList {
+    fn hit(&self, r: &Ray, t_min: f64, t_max: f64) -> Option<HitRecord> {
+        let mut temp_rec = None;
+        let mut closest_so_far = t_max;
+
+        for object in &self.objects {
+            if let Some(hr) = object.hit(r, t_min, closest_so_far) {
+                closest_so_far = hr.t;
+                temp_rec = Some(hr);
+            }
+        }
+        temp_rec
+    }
+}

@@ 7,6 7,9 @@ use ray::*;
 mod hittable;
 use hittable::*;
 
+mod hittable_list;
+use hittable_list::*;
+
 mod sphere;
 use sphere::*;