Crizomb
2c120106c2
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Build Bevy Game (Linux) / build (push) Successful in 18m45s
38 lines
1.1 KiB
Rust
38 lines
1.1 KiB
Rust
use bevy::{prelude::*, render::renderer};
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#[derive(Component)]
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#[require(Transform)]
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pub struct PhysicsBody {
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pub mass: f32,
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pub force: Vec2,
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pub velocity: Vec2,
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pub drag: f32, // velocity multiplied each physics update by (1-drag)
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}
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impl Default for PhysicsBody {
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fn default() -> Self {
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Self {
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mass: 1.0,
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force: Vec2::ZERO,
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velocity: Vec2::ZERO,
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drag: 0.0,
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}
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}
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}
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pub fn integrate(mut query: Query<(&mut Transform, &mut PhysicsBody)>, time: Res<Time<Fixed>>) {
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for (mut transform, mut physicsbody) in &mut query {
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let force = physicsbody.force;
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let mass = physicsbody.mass;
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let drag = physicsbody.drag;
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let delta_secs = time.delta_secs();
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physicsbody.velocity += force * delta_secs / mass;
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// Drag because stability is good you know
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physicsbody.velocity *= 1.0 - drag;
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transform.translation.x += physicsbody.velocity.x * delta_secs;
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transform.translation.y += physicsbody.velocity.y * delta_secs;
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physicsbody.force = Vec2::ZERO;
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}
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}
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