41 lines
1.2 KiB
Rust
41 lines
1.2 KiB
Rust
use bevy::prelude::*;
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#[derive(Component, Deref, DerefMut, Debug, Default)]
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pub struct Velocity(pub Vec2);
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#[derive(Component, Deref, DerefMut, Debug, Default)]
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pub struct Heading(pub Vec2);
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#[derive(Component, Deref, DerefMut, Debug, Default)]
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pub struct Speed(pub f32);
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#[derive(Component, Deref, DerefMut, Debug, Default)]
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pub struct Height(pub f32);
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#[derive(Component, Debug, Default)]
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pub struct YSortable;
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pub fn resolve_velocity(mut query: Query<(&Velocity, &mut Transform)>, time: Res<Time>) {
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for (velocity, mut transform) in query.iter_mut() {
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transform.translation += (velocity.0 * time.delta_seconds()).extend(0.);
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}
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}
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pub fn update_velocity_by_heading(mut query: Query<(&mut Velocity, &Speed, &Heading)>) {
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if let Ok((mut velocity, speed, heading)) = query.get_single_mut() {
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**velocity = heading.normalize_or_zero() * (**speed);
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}
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}
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pub fn ysort(mut q: Query<(&mut Transform, Option<&Height>), With<YSortable>>) {
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q.iter_mut()
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.for_each(|(mut tf, z)| tf.translation.z = -tf.translation.y - z.map(|z| z.0).unwrap_or(0.))
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}
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#[derive(Bundle, Debug, Default)]
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pub struct Mover {
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pub velocity: Velocity,
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pub heading: Heading,
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pub speed: Speed,
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}
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