sidewinder/
ray.rs

1use crate::vec3::{Point, Vec3};
2
3/// **P**(*t*) = **A** + *t***b** where **P** is a position along a 3D line, **A** is the ray
4/// origin, and **b** is the ray direction. Change *t*, the distance from the origin, to affect the
5/// color seen along the ray.
6#[non_exhaustive]
7#[derive(Debug, Default, Clone, Copy, PartialEq, PartialOrd)]
8pub struct Ray {
9    pub origin: Point,
10    pub direction: Vec3,
11}
12
13impl Ray {
14    #[inline]
15    #[must_use]
16    pub const fn new(origin: Point, direction: Vec3) -> Self {
17        Self { origin, direction }
18    }
19
20    /// Get a location along a ray path using the distance `t` from the ray origin.
21    #[inline]
22    #[must_use]
23    pub fn at(self, t: f64) -> Point {
24        self.direction.mul_add(t, self.origin) // self.origin + t * self.direction
25    }
26}
sidewinder/ray.rs

sidewinder/
ray.rs
