Animationen für die Pixeldecke
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use rand::Rng;
use crate::point2d::p2d;
use crate::point2d::Point2d;
use crate::vec2d::v2d;
use crate::vec2d::Vec2d;
pub struct Rect2d {
origin: Point2d,
size: Vec2d,
}
impl Rect2d {
pub fn new(x0: i32, x1: i32, y0: i32, y1: i32) -> Rect2d {
assert!(x0 <= x1 && y0 <= y1);
let origin = p2d(x0, y0);
let size = v2d(x1 - x0, y1 - y0);
Rect2d { origin, size }
}
pub fn left(&self) -> i32 {
self.origin.x
}
pub fn right(&self) -> i32 {
self.origin.x + self.size.x
}
pub fn bottom(&self) -> i32 {
self.origin.y
}
pub fn top(&self) -> i32 {
self.origin.y + self.size.y
}
pub fn width(&self) -> i32 {
self.size.x
}
pub fn height(&self) -> i32 {
self.size.y
}
pub fn contains(&self, p: Point2d) -> bool {
self.left() <= p.x && p.x < self.right() && self.bottom() <= p.y && p.y < self.top()
}
pub fn random_point<R>(&self, rng: &mut R) -> Point2d
where
R: Rng,
{
let x = rng.gen_range(self.left(), self.right());
let y = rng.gen_range(self.bottom(), self.top());
p2d(x, y)
}
}
pub fn r2d(x0: i32, x1: i32, y0: i32, y1: i32) -> Rect2d {
Rect2d::new(x0, x1, y0, y1)
}