latest

src/hittable.rs

@@ -1,21 +1,19 @@
-use std::rc::Rc;
-
 use crate::material::Material;
 use crate::ray::*;
 use crate::vec3::*;
 
 #[derive(Clone)]
-pub struct HitRecord {
+pub struct HitRecord<'a> {
     pub p: Point3,
     pub normal: Vec3,
-    pub mat_ptr: Rc<Material>,
+    pub mat_ptr: &'a dyn Material,
     pub t: f64,
     pub front_face: bool,
 }
 
-impl HitRecord {
-    pub fn new_empty() -> Self {
-        HitRecord { p: Point3::new(0.0, 0.0, 0.0), normal: Vec3::new(0.0, 0.0, 0.0), t: 0.0, front_face: false, mat_ptr: Rc::new(Material {  }) }
+impl HitRecord<'_> {
+    pub fn new_empty<T: Material>(material: &T) -> Self {
+        HitRecord { p: Point3::new(0.0, 0.0, 0.0), normal: Vec3::new(0.0, 0.0, 0.0), t: 0.0, front_face: false, mat_ptr: material  }
     }
 
     pub fn set_face_normal(&mut self, r: &Ray, outward_normal: &Vec3) {

src/hittable_list.rs

@@ -20,7 +20,7 @@ impl HittableList {
 
 impl Hittable for HittableList {
     fn hit(&mut self, r: &crate::ray::Ray, t_min: f64, t_max: f64, rec: &mut HitRecord) -> bool {
-        let mut temp_rec = HitRecord::new_empty();
+        let mut temp_rec = HitRecord::new_empty(rec.mat_ptr.clone());
         let mut hit_anything = false;
         let mut closest_so_far = t_max;
 

src/main.rs

@@ -10,6 +10,8 @@ pub mod material;
 
 use std::{io::{BufWriter, Write, stdout}, fs::File, time::Instant};
 
+use material::Metal;
+
 use crate::{
     color::*,
     sphere::*,
@@ -22,7 +24,7 @@ use crate::{
 };
 
 fn ray_color(r: &Ray, world: &mut dyn Hittable, depth: i32) -> Color {
-    let mut rec = HitRecord::new_empty();
+    let mut rec = HitRecord::new_empty(&Metal{ albedo: Color::new_empty() });
 
     // Limit the bounces
     if depth <= 0 {
@@ -33,7 +35,7 @@ fn ray_color(r: &Ray, world: &mut dyn Hittable, depth: i32) -> Color {
         let mut scattered = Ray::new_empty();
         let mut attenuation = Color::new_empty();
 
-        if rec.mat_ptr
+        //if rec.mat_ptr
     }
 
     let unit_direction: Vec3 = r.direction().unit_vector();
@@ -52,8 +54,8 @@ fn main() {
 
     // World
     let mut world = HittableList::new_empty();
-    world.add(Box::new(Sphere::new(Point3::new(0.0, 0.0, -1.0), 0.5)));
-    world.add(Box::new(Sphere::new(Point3::new(0.0, -100.5, -1.0), 100.0)));
+    //world.add(Box::new(Sphere::new(Point3::new(0.0, 0.0, -1.0), 0.5)));
+    //world.add(Box::new(Sphere::new(Point3::new(0.0, -100.5, -1.0), 100.0)));
 
     // Camera
     let cam = Camera::new();

src/material.rs

@@ -2,11 +2,7 @@ use crate::hittable::HitRecord;
 use crate::ray::Ray;
 use crate::vec3::{Color, random_unit_vector, reflect};
 
-pub struct Material  {
-
-}
-
-pub trait Scatter:  {
+pub trait Material:  {
     fn scatter(&self, r_in: &Ray, rec: HitRecord, attenuation: &mut Color, scattered: &mut Ray) -> bool;
 }
 
@@ -20,7 +16,7 @@ impl Lambertian {
     }
 }
 
-impl Scatter for Lambertian {
+impl Material for Lambertian {
     fn scatter(&self, r_in: &Ray, rec: HitRecord, attenuation: &mut Color, scattered: &mut Ray) -> bool {
         let scatter_direction = rec.normal + random_unit_vector();
 
@@ -44,7 +40,7 @@ impl Metal {
     }
 }
 
-impl Scatter for Metal {
+impl Material for Metal {
     fn scatter(&self, r_in: &Ray, rec: HitRecord, attenuation: &mut Color, scattered: &mut Ray) -> bool {
         let reflected = reflect(&r_in.direction(), &rec.normal);
         scattered = &mut Ray::new(rec.p, rec.normal);

src/sphere.rs

@@ -1,22 +1,20 @@
-use std::rc::Rc;
-
-use crate::{hittable::*, material};
+use crate::hittable::*;
 use crate::material::Material;
 use crate::vec3::*;
 
-pub struct Sphere {
+pub struct Sphere<'a> {
     center: Point3,
     radius: f64,
-    mat_ptr: Rc<Material>,
+    mat_ptr: &'a dyn Material,
 }
 
-impl Sphere {
-    pub fn new(center: Point3, radius: f64, mat_ptr: Rc<Material>) -> Self {
+impl Sphere<'_> {
+    pub fn new<T: Material>(center: Point3, radius: f64, mat_ptr: &T) -> Self {
         Sphere {center, radius, mat_ptr}
     }
 }
 
-impl Hittable for Sphere {
+impl Hittable for Sphere<'_> {
     fn hit(&mut self, r: &crate::ray::Ray, t_min: f64, t_max: f64, rec: &mut HitRecord) -> bool {
         let oc = r.origin() - self.center;
         let a = r.direction().length_squared();