73 lines
1.7 KiB
Rust
73 lines
1.7 KiB
Rust
use crate::{Point, Rectangle, Vector};
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use std::f32::consts::{FRAC_PI_2, PI};
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use std::ops::RangeInclusive;
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/// Degrees
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#[derive(Debug, Copy, Clone, PartialEq, PartialOrd)]
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pub struct Degrees(pub f32);
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/// Radians
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#[derive(Debug, Copy, Clone, PartialEq, PartialOrd)]
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pub struct Radians(pub f32);
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impl Radians {
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/// The range of radians of a circle.
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pub const RANGE: RangeInclusive<Radians> = Radians(0.0)..=Radians(2.0 * PI);
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}
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impl From<Degrees> for Radians {
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fn from(degrees: Degrees) -> Self {
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Self(degrees.0 * PI / 180.0)
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}
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}
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impl From<f32> for Radians {
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fn from(radians: f32) -> Self {
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Self(radians)
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}
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}
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impl From<u8> for Radians {
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fn from(radians: u8) -> Self {
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Self(f32::from(radians))
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}
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}
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impl From<Radians> for f64 {
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fn from(radians: Radians) -> Self {
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Self::from(radians.0)
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}
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}
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impl num_traits::FromPrimitive for Radians {
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fn from_i64(n: i64) -> Option<Self> {
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Some(Self(n as f32))
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}
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fn from_u64(n: u64) -> Option<Self> {
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Some(Self(n as f32))
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}
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fn from_f64(n: f64) -> Option<Self> {
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Some(Self(n as f32))
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}
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}
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impl Radians {
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/// Calculates the line in which the angle intercepts the `bounds`.
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pub fn to_distance(&self, bounds: &Rectangle) -> (Point, Point) {
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let angle = self.0 - FRAC_PI_2;
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let r = Vector::new(f32::cos(angle), f32::sin(angle));
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let distance_to_rect = f32::max(
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f32::abs(r.x * bounds.width / 2.0),
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f32::abs(r.y * bounds.height / 2.0),
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);
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let start = bounds.center() - r * distance_to_rect;
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let end = bounds.center() + r * distance_to_rect;
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(start, end)
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}
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}
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