made line_drawing generic over array sizes. Added some helper methods.

This commit is contained in:
Gabe Venberg 2023-10-24 12:14:56 -05:00
parent e9770286ec
commit 3963c0fc90

View file

@ -1,13 +1,43 @@
use core::{iter::Iterator, mem::swap};
use core::mem::swap;
struct Point {
pub struct Point {
x: isize,
y: isize,
}
impl Point {
/// converts a point (representing a point on a 4 quadrant grid) into a upoint (representing a
/// point on a 1 quadrant grid with the origin in the bottom-left corner). Returns none if
/// the resulting point would have either number negative.
pub fn to_upoint(&self, zero_coord: &UPoint) -> Option<UPoint> {
Some(UPoint {
x: zero_coord.x.checked_add_signed(self.x)?,
y: zero_coord.y.checked_add_signed(self.y)?,
})
}
}
pub struct UPoint {
x: usize,
y: usize,
}
fn draw_line(mut p0: Point, mut p1: Point, matrix: &mut [[u8; 5]; 5]) {
impl UPoint {
/// converts a upoint (representing a point on a 1 quadrant grid with the origin in the
/// bottom-left corner) into a point( representing a point on a 4 quadrant grid
pub fn to_point(&self, zero_coord: &UPoint) -> Point {
Point {
x: zero_coord.x as isize - self.x as isize,
y: zero_coord.y as isize - self.y as isize,
}
}
}
pub fn draw_line<const X: usize, const Y: usize>(
mut p0: Point,
mut p1: Point,
matrix: &mut [[u8; X]; Y],
) {
let steep = (p0.x - p1.x).abs() < (p0.y - p1.x).abs();
if steep {