72 lines
1.8 KiB
Rust
72 lines
1.8 KiB
Rust
use crate::math_utils::{reflect};
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use crate::types_defined::{Color, HitRecord, Ray, Vec3};
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#[derive(Debug)]
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pub enum MaterialKind {
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Lambertian(Lambertian),
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Metal(Metal),
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}
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pub trait Material {
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fn scatter(&self, r_in: &Ray, hit_record: &mut HitRecord, attenuation: &mut Color, ray: &mut Ray) -> bool;
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}
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#[derive(Debug)]
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pub struct Lambertian {
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pub albedo: Color,
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}
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impl Clone for Lambertian {
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fn clone(&self) -> Self {
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Lambertian {
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albedo: self.albedo,
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}
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}
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}
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impl Material for Lambertian {
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fn scatter(&self, r_in: &Ray, hit_record: &mut HitRecord, attenuation: &mut Color, scattered: &mut Ray) -> bool {
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let scatter_direction = r_in.direction + Vec3::random_unit_on_hemisphere(hit_record.normal);
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// hit_record.normal + Vec3::random_unit();
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// let scatter_direction = reflect(r_in.direction, hit_record.normal);
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// if near_zero(scatter_direction) {
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// scattered.direction = r_in.direction;
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// }
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*scattered = Ray::new(hit_record.p, scatter_direction);
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*attenuation = self.albedo.clone();
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true
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}
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}
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#[derive(Debug)]
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pub struct Metal {
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pub albedo: Color,
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}
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impl Clone for Metal {
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fn clone(&self) -> Self {
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Metal {
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albedo: self.albedo,
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}
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}
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}
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impl Material for Metal {
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fn scatter(&self, r_in: &Ray, hit_record: &mut HitRecord, attenuation: &mut Color, scattered: &mut Ray) -> bool {
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/*
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vec3 reflected = reflect(r_in.direction(), rec.normal);
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scattered = ray(rec.p, reflected);
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attenuation = albedo;
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return true;
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*/
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let reflected = reflect(r_in.direction, hit_record.normal);
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*scattered = Ray::new(hit_record.p, reflected);
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*attenuation = self.albedo.clone();
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true
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}
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} |