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
|
use crate::Float;
use crate::core::{Ray, Vector3f, Bound3f};
use crate::world::{Hittable, DynHittable, Intersection};
pub struct Instance {
inner: DynHittable,
translate: Vector3f,
}
pub trait Instancable: Into<DynHittable> {
fn translate(self, x: Float, y: Float, z: Float) -> Instance {
self.translate_vec(Vector3f::new_xyz(x, y, z))
}
fn translate_vec(self, offset: Vector3f) -> Instance {
Instance::new_translate(self.into(), offset)
}
}
impl Instance {
pub fn new_translate(inner: DynHittable, offset: Vector3f) -> Self {
Self {
inner,
translate: offset,
}
}
}
impl Hittable for Instance {
fn intersect(&self, ray: &Ray) -> Option<Intersection> {
let ray = Ray::new(ray.origin - self.translate, ray.direction);
self.inner.intersect(&ray).map(|mut int| {
int.p += &self.translate;
int
})
}
fn bounding_box(&self) -> Bound3f {
self.inner.bounding_box().offset(self.translate)
}
}
impl Into<DynHittable> for Instance {
fn into(self) -> DynHittable {
DynHittable::new(Box::new(self))
}
}
#[cfg(test)]
mod tests {
use super::*;
use crate::world::shapes::Sphere;
#[test]
fn sphere_translation() {
//let sph = Sphere::new(2.0).translate(2.0, 3.0, 4.0);
let sph = Sphere::new(2.0).translate(2.0, 3.0, 4.0);
let ray = Ray {
origin: Vector3f::new_xyz(1.0, 0.0, 0.0),
direction: Vector3f::new_xyz(0.0, 1.0, 1.5).norm(),
};
let dist = sph.intersect(&ray).unwrap();
println!("hey {}", dist.t);
assert!((dist.t - 3.28).abs() < 0.01);
}
}
|
