src/entities/bug.rs


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use geometry::*;
use hitbox::*;

#[derive(Debug, Clone)]
pub struct Bug {
    pub pos: Vec2d,
    pub rotation: f64,
    pub velocity: Vec2d,
    pub alive: bool
}

const SPEED: f64 = 175.;

impl Bug {
    pub fn new(x: f64, y: f64) -> Bug {
        let pos = Vec2d::new(x, y);
        let pos_unit = pos.unit();
        Bug {
            pos,
            rotation: (-pos).angle(),
            velocity: -pos_unit * SPEED,
            alive: true
        }
    }

    pub fn advance(&mut self, seconds: f64) {
        self.pos = self.pos + self.velocity * seconds;
    }
}

impl CircleHitbox for Bug {
    fn pos(&self) -> Vec2d {
        self.pos
    }
    fn radius(&self) -> f64 {
        75.
    }
}