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Update Polygon tool to draw stars/ngons so they're tilted upright (#1640)

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* Update angel of new polygon and star tool

* Math tidying up

---------

Co-authored-by: Keavon Chambers <keavon@keavon.com>
This commit is contained in:
Haikal 2024-03-03 06:53:51 +07:00 • committed by GitHub
parent a1f2a2b256
commit 9090a0e6e9
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GPG key ID: B5690EEEBB952194
1 changed files with 4 additions and 2 deletions
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6
libraries/bezier-rs/src/subpath/core.rs
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@ -240,8 +240,9 @@ impl<ManipulatorGroupId: crate::Identifier> Subpath<ManipulatorGroupId> {
/// Constructs a regular polygon (ngon). Based on `sides` and `radius`, which is the distance from the center to any vertex.
pub fn new_regular_polygon(center: DVec2, sides: u64, radius: f64) -> Self {
let angle_increment = std::f64::consts::TAU / (sides as f64);
let anchor_positions = (0..sides).map(|i| {
let angle = (i as f64) * std::f64::consts::TAU / (sides as f64);
let angle = (i as f64) * angle_increment - std::f64::consts::FRAC_PI_2;
let center = center + DVec2::ONE * radius;
DVec2::new(center.x + radius * f64::cos(angle), center.y + radius * f64::sin(angle)) * 0.5
});
@ -250,8 +251,9 @@ impl<ManipulatorGroupId: crate::Identifier> Subpath<ManipulatorGroupId> {
/// Constructs a star polygon (n-star). See [new_regular_polygon], but with interspersed vertices at an `inner_radius`.
pub fn new_star_polygon(center: DVec2, sides: u64, radius: f64, inner_radius: f64) -> Self {
let angle_increment = 0.5 * std::f64::consts::TAU / (sides as f64);
let anchor_positions = (0..sides * 2).map(|i| {
let angle = (i as f64) * 0.5 * std::f64::consts::TAU / (sides as f64);
let angle = (i as f64) * angle_increment - std::f64::consts::FRAC_PI_2;
let center = center + DVec2::ONE * radius;
let r = if i % 2 == 0 { radius } else { inner_radius };
DVec2::new(center.x + r * f64::cos(angle), center.y + r * f64::sin(angle)) * 0.5