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wip: impl_draw, optional drawing

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facile pop culture reference 2026-07-06 05:35:48 +03:00
parent 0b9e9c0696
commit bf16288884
12 changed files with 213 additions and 229 deletions
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67
src/space/xywh.rs
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@ -2,6 +2,28 @@ use super::*;
use Origin::*;
use Split::*;
/// Where is [0, 0] located?
///
/// ```
/// use tengri::draw::Origin;
/// let _ = Origin::NW.align(());
/// ```
#[cfg_attr(test, derive(Arbitrary))]
#[derive(Debug, Copy, Clone, Default)] pub enum Origin {
#[default] C, X, Y, NW, N, NE, E, SE, S, SW, W
}
/// Something that has `[0, 0]` at a particular point.
pub trait HasOrigin {
fn origin (&self) -> Origin;
}
impl<T: AsRef<Origin>> HasOrigin for T {
fn origin (&self) -> Origin {
*self.as_ref()
}
}
pub trait Xy<N: Coord> {
fn x (&self) -> N;
fn y (&self) -> N;
@ -17,59 +39,16 @@ pub trait Xywh<N: Coord>: Xy<N> + Wh<N> {
}
}
pub trait Lrtb<N: Coord> {
// FIXME: factor origin
fn lrtb (&self) -> [N;4] {
[self.x(), self.y(), self.x()+self.w(), self.y()+self.h()]
}
}
pub trait Wide<N: Coord> {
pub trait Wide<N: Coord>: Xy<N> {
fn w (&self) -> N { N::zero() }
fn w_min (&self) -> N { self.w() }
fn w_max (&self) -> N { self.w() }
fn iter_x (&self) -> impl Iterator<Item = N> where Self: HasOrigin {
self.x_west()..self.x_east()
}
fn x_west (&self) -> N where Self: HasOrigin {
let w = self.w();
let a = self.origin();
let d = match a { NW|W|SW => 0.into(), N|X|C|Y|S => w/2.into(), NE|E|SE => w };
self.x().minus(d)
}
fn x_east (&self) -> N where Self: HasOrigin {
let w = self.w();
let a = self.origin();
let d = match a { NW|W|SW => w, N|X|C|Y|S => w/2.into(), NE|E|SE => 0.into() };
self.x().plus(d)
}
fn x_center (&self) -> N where Self: HasOrigin {
todo!()
}
}
pub trait Tall<N: Coord> {
fn h (&self) -> N { N::zero() }
fn h_min (&self) -> N { self.h() }
fn h_max (&self) -> N { self.h() }
fn iter_y (&self) -> impl Iterator<Item = N> where Self: HasOrigin {
self.y_north()..self.y_south()
}
fn y_north (&self) -> N where Self: HasOrigin {
let a = self.origin();
let h = self.h();
let d = match a { NW|N|NE => 0.into(), W|X|C|Y|E => h/2.into(), SW|S|SE => h };
self.y().minus(d)
}
fn y_south (&self) -> N where Self: HasOrigin {
let a = self.origin();
let h = self.h();
let d = match a { NW|N|NE => h, W|X|C|Y|E => h/2.into(), SW|S|SE => 0.into() };
self.y().plus(d)
}
fn y_center (&self) -> N where Self: HasOrigin {
todo!()
}
}
/// Point with size.