1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
|
use std::sync::Arc;
use crate::{
hittable::{HitRecord, Hittable, AABB},
material::Material,
ray::Ray,
vec3::{Point3, Vec3},
};
pub struct XZRect {
pub material: Arc<dyn Material>,
pub x0: f64,
pub x1: f64,
pub z0: f64,
pub z1: f64,
pub k: f64,
}
impl XZRect {
fn has_infinite_bounds(&self) -> bool {
self.x0.is_infinite()
|| self.x1.is_infinite()
|| self.z0.is_infinite()
|| self.z1.is_infinite()
}
}
impl Hittable for XZRect {
fn hit(&self, ray: &Ray, t_min: f64, t_max: f64) -> Option<HitRecord> {
let t = (self.k - ray.origin.y) / ray.direction.y;
if t < t_min || t > t_max {
return None;
}
let x = ray.origin.x + t * ray.direction.x;
let z = ray.origin.z + t * ray.direction.z;
if x < self.x0 || x > self.x1 || z < self.z0 || z > self.z1 {
return None;
}
let mut hit_record = HitRecord::new();
hit_record.u = (x - self.x0) / (self.x1 - self.x0);
hit_record.v = (z - self.z0) / (self.z1 - self.z0);
hit_record.t = t;
let outward_normal = Vec3 {
x: 0.0,
y: 1.0,
z: 0.0,
};
hit_record.set_face_normal(ray, &outward_normal);
hit_record.material = Some(self.material.clone());
hit_record.p = ray.at(t);
Some(hit_record)
}
fn bounding_box(&self, _: f64, _: f64) -> Option<AABB> {
match self.has_infinite_bounds() {
true => None,
false => Some(AABB {
minimum: Point3 {
x: self.x0,
y: self.k - 0.0001,
z: self.z0,
},
maximum: Point3 {
x: self.x1,
y: self.k + 0.0001,
z: self.z1,
},
}),
}
}
}
|