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use crate::{
access,
geom::Ray,
math::{Dir3, Pos3, Vec3},
};
#[derive(Debug)]
pub struct Orient {
pos: Pos3,
forward: Dir3,
right: Dir3,
up: Dir3,
}
impl Orient {
access!(pos, Pos3);
access!(forward, Dir3);
access!(right, Dir3);
access!(up, Dir3);
#[inline]
#[must_use]
pub fn new(ray: Ray) -> Self {
let (pos, forward) = ray.destruct();
let right = Dir3::new_normalize(forward.cross(&Vec3::z_axis()));
let up = Dir3::new_normalize(right.cross(&forward));
Self {
pos,
forward,
up,
right,
}
}
#[inline]
#[must_use]
pub fn new_up(ray: Ray, up: &Dir3) -> Self {
let (pos, forward) = ray.destruct();
let right = Dir3::new_normalize(forward.cross(up));
let up = Dir3::new_normalize(right.cross(&forward));
Self {
pos,
forward,
up,
right,
}
}
#[inline]
#[must_use]
pub fn new_tar(pos: Pos3, tar: &Pos3) -> Self {
Self::new(Ray::new(pos, Dir3::new_normalize(tar - pos)))
}
#[inline]
#[must_use]
pub fn back(&self) -> Dir3 {
-self.forward
}
#[inline]
#[must_use]
pub fn left(&self) -> Dir3 {
-self.right
}
#[inline]
#[must_use]
pub fn down(&self) -> Dir3 {
-self.up
}
#[inline]
#[must_use]
pub const fn forward_ray(&self) -> Ray {
Ray::new(self.pos, self.forward)
}
#[inline]
#[must_use]
pub fn backward_ray(&self) -> Ray {
Ray::new(self.pos, -self.forward)
}
#[inline]
#[must_use]
pub const fn up_ray(&self) -> Ray {
Ray::new(self.pos, self.up)
}
#[inline]
#[must_use]
pub fn down_ray(&self) -> Ray {
Ray::new(self.pos, -self.up)
}
#[inline]
#[must_use]
pub const fn right_ray(&self) -> Ray {
Ray::new(self.pos, self.right)
}
#[inline]
#[must_use]
pub fn left_ray(&self) -> Ray {
Ray::new(self.pos, -self.right)
}
}