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use std::f64::consts::PI;
use crate::*;
pub fn rectangle<P>(center: &P, width: Positive, height: Positive) -> PointCloud2D<P>
where
P: IsBuildable2D,
{
let mut pc = PointCloud2D::with_capacity(4);
let w = width.get();
let h = height.get();
pc.push(P::new(center.x() - w / 2.0, center.y() - h / 2.0));
pc.push(P::new(center.x() + w / 2.0, center.y() - h / 2.0));
pc.push(P::new(center.x() + w / 2.0, center.y() + h / 2.0));
pc.push(P::new(center.x() - w / 2.0, center.y() + h / 2.0));
pc
}
pub fn involut_circle<P>(
center: &P,
n_points: usize,
diameter: Positive,
start: Rad,
end: Rad,
) -> PointCloud2D<P>
where
P: IsBuildable2D,
{
let mut pc = PointCloud2D::with_capacity(n_points);
let d = diameter.get();
let p_dist = (end.val - start.val).abs() / (n_points - 1) as f64;
for i in 0..n_points {
let current = (i as f64) * p_dist;
pc.push(P::new(
center.x() + d / 2.0 * (current.cos() + current * current.sin()),
center.y() + d / 2.0 * (current.sin() - current * current.cos()),
));
}
pc
}
pub fn arc<P>(
center: &P,
n_points: usize,
diameter: Positive,
start: Rad,
end: Rad,
) -> PointCloud2D<P>
where
P: IsBuildable2D,
{
let mut pc = PointCloud2D::with_capacity(n_points);
let d = diameter.get();
let p_dist = (end.val - start.val).abs() / (n_points - 1) as f64;
for i in 0..n_points {
let radians = start.val + (i as f64) * p_dist;
pc.push(P::new(
center.x() + d / 2.0 * radians.cos(),
center.y() + d / 2.0 * radians.sin(),
));
}
pc
}
pub fn ellipse<P>(center: &P, n_points: usize, ap: Positive, bp: Positive) -> PointCloud2D<P>
where
P: IsBuildable2D,
{
let mut pc = PointCloud2D::with_capacity(n_points);
let p_dist = PI / (n_points - 1) as f64;
let a = ap.get();
let b = bp.get();
let angle: f64 = 0.0;
for i in 0..n_points {
let radians = (i as f64) * p_dist;
pc.push(P::new(
center.x() + a * radians.cos() * angle.cos() - b * radians.sin() * angle.sin(),
center.y() + a * radians.cos() * angle.sin() + b * radians.sin() * angle.cos(),
));
}
pc
}