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use crate::deref_as;
use bevy::math::Vec2;
use bevy::prelude::{Component, Query, Res, Time, Transform};
use std::ops::Mul;
pub const DIR_LEFT: Vec2 = Vec2::new(-1.0, 0.0);
pub const DIR_RIGHT: Vec2 = Vec2::new(1.0, 0.0);
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#[derive(Clone, Copy, Debug, Component)]
pub struct Velocity(Vec2);
deref_as!(mut Velocity => Vec2);
impl From<Vec2> for Velocity {
fn from(value: Vec2) -> Self {
Velocity(value)
}
}
impl Default for Velocity {
fn default() -> Self {
Self(Vec2::new(100.0, 100.0))
}
}
impl<T> Mul<T> for Velocity
where
Vec2: Mul<T, Output = Vec2>,
{
type Output = Velocity;
fn mul(self, rhs: T) -> Self::Output {
Velocity::from(self.0.mul(rhs))
}
}
impl Velocity {
pub const ZERO: Velocity = Velocity(Vec2::ZERO);
}
pub fn apply_velocity(delta: Res<Time>, mut entity_query: Query<(&Velocity, &mut Transform)>) {
let dt = delta.delta_seconds();
for (velocity, mut transform) in &mut entity_query {
transform.translation += velocity.extend(0.0) * dt;
}
}