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use crate::{
default_start_angle,
options::{Options, StrokeOptions},
tess, FreePolyBuilder, PolyBuilder, DEFAULT_RADIUS,
};
use gee::{Angle, Circle, Point, Rect};
#[derive(Clone, Debug)]
pub struct RegularPolyBuilder {
circle: Circle,
sides: u32,
start_angle: Angle,
options: Options,
}
impl Default for RegularPolyBuilder {
fn default() -> Self {
Self {
circle: Circle::from_radius(DEFAULT_RADIUS),
sides: 3,
start_angle: default_start_angle(),
options: Default::default(),
}
}
}
impl RegularPolyBuilder {
pub fn new(sides: u32) -> Self {
Self::default().with_sides(sides)
}
pub fn triangle() -> Self {
Self::new(3)
}
pub fn square() -> Self {
Self::new(4)
}
pub fn pentagon() -> Self {
Self::new(5)
}
pub fn hexagon() -> Self {
Self::new(6)
}
pub fn octagon() -> Self {
Self::new(8)
}
pub fn decagon() -> Self {
Self::new(10)
}
pub fn with_sides(mut self, sides: u32) -> Self {
assert!(
sides >= 3,
"regular polygons must have at least 3 sides, but this one has {}",
sides
);
self.sides = sides;
self
}
pub fn with_circle(mut self, circle: Circle) -> Self {
self.circle = circle;
self
}
pub fn with_center_and_radius(self, center: Point, radius: f32) -> Self {
self.with_circle(Circle::new(center, radius))
}
pub fn with_rotation(mut self, start_angle: impl Into<Angle>) -> Self {
self.start_angle = start_angle.into();
self
}
stroke!(public);
fill!();
build!();
}
impl PolyBuilder for RegularPolyBuilder {
fn options(&self) -> &Options {
&self.options
}
fn bounding_rect(&self) -> Rect {
self.circle.bounding_rect()
}
fn build<B: tess::path::traits::PathBuilder>(self, builder: &mut B) {
PolyBuilder::build(
FreePolyBuilder::from_parts(
self.circle.circle_points(self.sides, self.start_angle),
true,
Some(self.bounding_rect()),
self.options,
),
builder,
);
}
}