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use crate::{Point, Rectangle, Vector};
use std::f32::consts::PI;
use std::ops::RangeInclusive;
/// Degrees
#[derive(Debug, Copy, Clone, PartialEq, PartialOrd)]
pub struct Degrees(pub f32);
/// Radians
#[derive(Debug, Copy, Clone, PartialEq, PartialOrd)]
pub struct Radians(pub f32);
impl Radians {
/// The range of radians of a circle.
pub const RANGE: RangeInclusive<Radians> = Radians(0.0)..=Radians(2.0 * PI);
}
impl From<Degrees> for Radians {
fn from(degrees: Degrees) -> Self {
Self(degrees.0 * PI / 180.0)
}
}
impl From<f32> for Radians {
fn from(radians: f32) -> Self {
Self(radians)
}
}
impl From<u8> for Radians {
fn from(radians: u8) -> Self {
Self(f32::from(radians))
}
}
impl From<Radians> for f64 {
fn from(radians: Radians) -> Self {
Self::from(radians.0)
}
}
impl num_traits::FromPrimitive for Radians {
fn from_i64(n: i64) -> Option<Self> {
Some(Self(n as f32))
}
fn from_u64(n: u64) -> Option<Self> {
Some(Self(n as f32))
}
fn from_f64(n: f64) -> Option<Self> {
Some(Self(n as f32))
}
}
impl Radians {
/// Calculates the line in which the [`Angle`] intercepts the `bounds`.
pub fn to_distance(&self, bounds: &Rectangle) -> (Point, Point) {
let v1 = Vector::new(f32::cos(self.0), f32::sin(self.0));
let distance_to_rect = f32::min(
f32::abs((bounds.y - bounds.center().y) / v1.y),
f32::abs(((bounds.x + bounds.width) - bounds.center().x) / v1.x),
);
let start = bounds.center() + v1 * distance_to_rect;
let end = bounds.center() - v1 * distance_to_rect;
(start, end)
}
}
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