27 lines
700 B
Rust
27 lines
700 B
Rust
use nalgebra::Vector3;
|
|
|
|
/// A normalized parametric Ray of the form (origin + direction * time)
|
|
///
|
|
/// That means at any time t: f64, the point represented by origin + direction *
|
|
/// time occurs on the ray.
|
|
#[derive(Debug)]
|
|
pub struct Ray {
|
|
pub origin: Vector3<f64>,
|
|
pub direction: Vector3<f64>,
|
|
}
|
|
|
|
impl Ray {
|
|
/// Construct a ray from endpoints
|
|
pub fn from_endpoints(start: Vector3<f64>, end: Vector3<f64>) -> Self {
|
|
let delta = (end - start).normalize();
|
|
Ray {
|
|
origin: start,
|
|
direction: delta,
|
|
}
|
|
}
|
|
|
|
/// Evaluate the ray at a certain point in time, yielding a point
|
|
pub fn eval(&self, time: f64) -> Vector3<f64> {
|
|
self.origin + self.direction * time
|
|
}
|
|
}
|