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
|
use crate::image::Image;
use crate::ray::Ray;
use crate::vec3::Vec3;
#[derive(Clone)]
pub struct Camera {
pub viewport_height: f64,
pub viewport_width: f64,
pub focal_length: f64,
pub origin: Vec3,
pub horizontal: Vec3,
pub vertical: Vec3,
pub upper_left_corner: Vec3,
}
impl Camera {
pub fn new(image: &Image, viewport_height: f64, focal_length: f64) -> Camera {
let viewport_width = image.aspect_ratio * viewport_height;
let origin = Vec3::new(0.0, 0.0, 0.0);
let horizontal = Vec3::new(viewport_width, 0.0, 0.0);
let vertical = Vec3::new(0.0, viewport_height, 0.0);
Camera {
viewport_height,
viewport_width,
focal_length,
origin,
horizontal,
vertical,
upper_left_corner: origin + vertical / 2.0
- horizontal / 2.0
- Vec3::new(0.0, 0.0, focal_length),
}
}
pub fn get_ray(&self, u: f64, v: f64) -> Ray {
Ray::new(
self.origin,
self.upper_left_corner + u * self.horizontal - v * self.vertical - self.origin,
)
}
}
|
