use crate::noise_fns::NoiseFn;
#[derive(Clone, Copy, Debug)]
pub struct Cylinders {
pub frequency: f64,
}
impl Cylinders {
pub const DEFAULT_FREQUENCY: f64 = 1.0;
pub fn new() -> Self {
Self {
frequency: Self::DEFAULT_FREQUENCY,
}
}
pub fn set_frequency(self, frequency: f64) -> Self {
Self { frequency }
}
}
impl Default for Cylinders {
fn default() -> Self {
Self::new()
}
}
impl NoiseFn<[f64; 2]> for Cylinders {
fn get(&self, point: [f64; 2]) -> f64 {
calculate_cylinders(&point, self.frequency)
}
}
impl NoiseFn<[f64; 3]> for Cylinders {
fn get(&self, point: [f64; 3]) -> f64 {
calculate_cylinders(&point, self.frequency)
}
}
impl NoiseFn<[f64; 4]> for Cylinders {
fn get(&self, point: [f64; 4]) -> f64 {
calculate_cylinders(&point, self.frequency)
}
}
fn calculate_cylinders(point: &[f64], frequency: f64) -> f64 {
let x = point[0] * frequency;
let y = point[1] * frequency;
let dist_from_center = (x.powi(2) + y.powi(2)).sqrt();
let dist_from_smaller_sphere = dist_from_center - dist_from_center.floor();
let dist_from_larger_sphere = 1.0 - dist_from_smaller_sphere;
let nearest_dist = dist_from_smaller_sphere.min(dist_from_larger_sphere);
1.0 - (nearest_dist * 4.0)
}