src/devices/screen/vector_points.rs


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use crate::*;

pub struct VectorPoints {
    points: [ScreenPosition; 3],
    pointer: usize,
}

impl VectorPoints {
    pub fn new() -> Self {
        Self { points: [ScreenPosition::ZERO; 3], pointer: 0 }
    }

    pub fn push(&mut self, point: ScreenPosition) {
        self.points[self.pointer] = point;
        self.pointer = (self.pointer + 1) % 3;
    }

    pub fn get_pair(&self) -> [ScreenPosition; 2] {
        [
            self.points[(self.pointer + 1) % 3],
            self.points[(self.pointer + 2) % 3],
        ]
    }

    pub fn get_triple(&self) -> [ScreenPosition; 3] {
        self.points
    }
}