You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
34 lines
1.0 KiB
34 lines
1.0 KiB
use crate::structs::Vec3;
|
|
use crate::object::Obj;
|
|
|
|
#[derive(Debug, Copy, Clone, PartialEq)]
|
|
pub struct Torus {
|
|
center: Vec3,
|
|
radius: f64,
|
|
thickness: f64
|
|
}
|
|
|
|
impl Torus {
|
|
pub const fn new(center: Vec3, radius: f64, thickness: f64) -> Torus {
|
|
Torus { center, radius, thickness }
|
|
}
|
|
pub const fn new_xyz(x: f64, y: f64, z: f64, radius: f64, thickness: f64) -> Torus {
|
|
Torus::new(Vec3::new(x, y, z), radius, thickness)
|
|
}
|
|
}
|
|
|
|
impl Obj for Torus {
|
|
fn distance_to(&self, point: Vec3) -> f64 {
|
|
let (dx, dy) = (point.x()-self.center.x(), point.y()-self.center.y());
|
|
let dh = f64::abs(f64::sqrt(dx*dx + dy*dy) - self.radius);
|
|
let dz = point.z() - self.center.z();
|
|
f64::sqrt(dh*dh + dz*dz) - self.thickness
|
|
}
|
|
|
|
fn normal_at(&self, point: Vec3) -> Vec3 {
|
|
let centered = point - self.center;
|
|
let centered_no_z= Vec3::new(centered.x(), centered.y(), 0.);
|
|
let closest = centered_no_z.unit() * self.radius;
|
|
(centered - closest).unit()
|
|
}
|
|
} |