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//! Geometrical primitives.
#[macro_use]
mod macros;
mod align;
mod angle;
mod dir;
mod em;
mod fraction;
mod gen;
mod length;
mod paint;
mod path;
mod point;
mod ratio;
mod rect;
mod relative;
mod scalar;
mod sides;
mod spec;
mod transform;
pub use align::*;
pub use angle::*;
pub use dir::*;
pub use em::*;
pub use fraction::*;
pub use gen::*;
pub use length::*;
pub use paint::*;
pub use path::*;
pub use point::*;
pub use ratio::*;
pub use rect::*;
pub use relative::*;
pub use scalar::*;
pub use sides::*;
pub use spec::*;
pub use transform::*;
use std::cmp::Ordering;
use std::f64::consts::PI;
use std::fmt::{self, Debug, Formatter};
use std::hash::{Hash, Hasher};
use std::iter::Sum;
use std::ops::*;
/// Generic access to a structure's components.
pub trait Get<Index> {
/// The structure's component type.
type Component;
/// Return the component for the specified index.
fn get(self, index: Index) -> Self::Component;
/// Borrow the component for the specified index mutably.
fn get_mut(&mut self, index: Index) -> &mut Self::Component;
/// Convenience method for setting a component.
fn set(&mut self, index: Index, component: Self::Component) {
*self.get_mut(index) = component;
}
}
/// A geometric shape with optional fill and stroke.
#[derive(Debug, Clone, Eq, PartialEq)]
pub struct Shape {
/// The shape's geometry.
pub geometry: Geometry,
/// The shape's background fill.
pub fill: Option<Paint>,
/// The shape's border stroke.
pub stroke: Option<Stroke>,
}
/// A shape's geometry.
#[derive(Debug, Clone, Eq, PartialEq)]
pub enum Geometry {
/// A line to a point (relative to its position).
Line(Point),
/// A rectangle with its origin in the topleft corner.
Rect(Size),
/// A ellipse with its origin in the topleft corner.
Ellipse(Size),
/// A bezier path.
Path(Path),
}
impl Geometry {
/// Fill the geometry without a stroke.
pub fn filled(self, fill: Paint) -> Shape {
Shape {
geometry: self,
fill: Some(fill),
stroke: None,
}
}
/// Stroke the geometry without a fill.
pub fn stroked(self, stroke: Stroke) -> Shape {
Shape {
geometry: self,
fill: None,
stroke: Some(stroke),
}
}
}
/// A numeric type.
pub trait Numeric:
Sized
+ Debug
+ Copy
+ PartialEq
+ Neg<Output = Self>
+ Add<Output = Self>
+ Sub<Output = Self>
+ Mul<f64, Output = Self>
+ Div<f64, Output = Self>
{
/// The identity element for addition.
fn zero() -> Self;
/// Whether `self` is zero.
fn is_zero(self) -> bool {
self == Self::zero()
}
/// Whether `self` consists only of finite parts.
fn is_finite(self) -> bool;
}
/// Round a float to two decimal places.
fn round_2(value: f64) -> f64 {
(value * 100.0).round() / 100.0
}
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