use crate::transformer::Transformers;
use crate::point::Point;
use crate::worldstate::WorldState;

use serde::{Serialize,Deserialize};

/// Flip Horizontal

#[derive(Serialize,Deserialize,Debug,Clone,Copy)]
pub struct FlipHorizontal {
    x: f32,
}

impl Transformers for FlipHorizontal {
    fn apply(&self, point_list: &[Point], _ws: &WorldState) -> Vec<Point> {
    point_list.iter()
        .map(| pt | {
            let dx = pt.x - self.x;
            Point { x: dx - 2. * dx,
                ..*pt
            }
        }).collect()
    }
}