Begin implementing triangle hittable
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89bcc587d2
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2 changed files with 68 additions and 8 deletions
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@ -14,6 +14,13 @@ pub struct Sphere {
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pub mat_ptr: Arc<dyn Material>,
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}
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pub struct Triangle {
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a: Point3,
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b: Point3,
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c: Point3,
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pub mat_ptr: Arc<dyn Material>,
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}
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pub trait Hittable: Sync + Send {
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fn hit(&self, r: &Ray, t_min: f64, t_max: f64, rec: &mut HitRecord) -> bool;
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}
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@ -92,3 +99,55 @@ impl Hittable for Sphere {
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return true;
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}
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}
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impl Triangle {
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pub fn new(a: Point3, b: Point3, c: Point3, m: Arc<dyn Material>) -> Self {
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Triangle {
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a,
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b,
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c,
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mat_ptr: m,
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}
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}
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}
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impl Hittable for Triangle {
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fn hit(&self, r: &Ray, t_min: f64, t_max: f64, rec: &mut HitRecord) -> bool {
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let a_to_b = self.b - self.a;
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let a_to_c = self.c - self.a;
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let u_vec = Vec3::cross(r.direction(), a_to_c);
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let det = Vec3::dot(a_to_b, u_vec);
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if det < 0.0 { // only positive bound
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return false;
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}
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let inv_det = 1.0 / det;
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let a_to_origin = r.origin() - self.a;
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let u = Vec3::dot(a_to_origin, u_vec) * inv_det;
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if u < 0.0 || u > 1.0 { //check if outside of triangle
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return false;
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}
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let v_vec = Vec3::cross(a_to_origin, a_to_b);
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let v = Vec3::dot(r.direction(), v_vec) * inv_det;
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if v < 0.0 || u+v > 1.0 { // intersection outside of triangle
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return false;
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}
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let dist = Vec3::dot(a_to_c, v_vec) * inv_det;
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if dist > 0.0 {
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}
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return true;
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}
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}
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17
src/main.rs
17
src/main.rs
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@ -50,23 +50,24 @@ fn ray_color(r: &Ray, world: &HittableList, depth: u32) -> Color {
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fn random_world() -> HittableList {
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let mut world = HittableList::new();
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let material_ground = Arc::new(Lambertian::new(&Color::new(0.05, 0.05, 0.05)));
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let material_ground = Arc::new(Lambertian::new(&Color::new(0.05, 0.05,0.05)));
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world.add(Box::<Sphere>::new(Sphere::new(
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Point3::new(0.0, -50000.0, 0.0),
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50000.0,
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material_ground.clone(),
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)));
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(-6..5).into_iter().for_each(|a| {
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(-6..5).into_iter().for_each(|b| {
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let choose_mat = utility::random_f64();
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let rad = utility::random_rng(0.1, 0.5);
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let center = Point3::new(
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1.5 * a as f64 + 1.3 * utility::random_f64(),
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0.2,
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rad,
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1.5 * b as f64 + 1.3 * utility::random_f64(),
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);
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if (center - Point3::new(4.0, 0.2, 0.0)).length() > 0.9 {
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if (center - Point3::new(4.0, rad, 0.0)).length() > 0.9 {
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if choose_mat < 0.8 {
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// diffuse
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let sphere_material = Arc::new(Lambertian::new(
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@ -74,7 +75,7 @@ fn random_world() -> HittableList {
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));
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world.add(Box::<Sphere>::new(Sphere::new(
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center,
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0.2,
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rad,
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sphere_material.clone(),
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)));
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} else if choose_mat < 0.95 {
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@ -146,12 +147,12 @@ fn main() {
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// Image
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let aspect_ratio = 16.0 / 9.0;
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let image_width = 1920;
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let image_width = 600;
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let image_height = (image_width as f64 / aspect_ratio) as u32;
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let samples_per_pixel = 200_u32;
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let samples_per_pixel = 50_u32;
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let max_depth = 50;
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let vfov = 25.0;
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let vfov = 40.0;
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let lookfrom = Point3::new(10.0, 4.0, 13.0);
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let lookat = Point3::new(0.0, 0.0, 0.0);
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let vup = Vec3::new(0.0, 1.0, 0.0);
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