31 lines
841 B
Rust
31 lines
841 B
Rust
use crate::material::Material;
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use crate::ray::*;
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use crate::vec3::*;
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#[derive(Clone)]
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pub struct HitRecord<'a> {
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pub p: Point3,
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pub normal: Vec3,
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pub mat_ptr: &'a dyn Material,
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pub t: f64,
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pub front_face: bool,
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}
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impl HitRecord<'_> {
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pub fn new_empty<T: Material>(material: &'static T) -> Self {
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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 }
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}
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pub fn set_face_normal(&mut self, r: &Ray, outward_normal: Vec3) {
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self.front_face = r.direction().dot(&outward_normal) < 0.0;
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self.normal = if self.front_face {
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outward_normal
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} else {
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outward_normal * -1.0
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}
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}
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}
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pub trait Hittable {
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fn hit(&mut self, r: &Ray, t_min: f64, t_max: f64) -> Option<HitRecord>;
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} |