60 lines
1.6 KiB
Rust
60 lines
1.6 KiB
Rust
use bevy::prelude::*;
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use crate::{
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obstacle::Obstacle,
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player::{Player, move_player},
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};
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// Hitbox
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#[derive(Component)]
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pub struct Collider {
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pub size: Vec2,
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}
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#[derive(Resource, Default)]
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pub struct HasCollided(pub bool);
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// Check collision with Player
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fn check_collision(
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mut player: Single<(&Transform, &Collider, &mut Sprite), With<Player>>,
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obstacle: Query<(&Transform, &Collider), With<Obstacle>>,
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mut has_collided: ResMut<HasCollided>,
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) {
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if has_collided.0 {
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return;
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}
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let (player_transform, player_collider, mut player_sprite) = player.into_inner();
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// Check whether or not each obstacles overlap the player
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for (collider_transform, collider_collider) in obstacle {
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if overlap(
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player_transform.translation.truncate(),
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player_collider.size / 2.0,
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collider_transform.translation.truncate(),
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collider_collider.size / 2.0,
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) {
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// println!("Collision!!!!!!!");
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player_sprite.color = Color::srgb(1.0, 0.0, 0.0);
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has_collided.0 = true;
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break;
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}
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}
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}
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// Test if there is an overlap between 2 boxes
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fn overlap(a_center: Vec2, a_half: Vec2, b_center: Vec2, b_half: Vec2) -> bool {
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let overlap_x = (a_center.x - b_center.x).abs() < (a_half.x + b_half.x);
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let overlap_y = (a_center.y - b_center.y).abs() < (a_half.y + b_half.y);
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overlap_x && overlap_y
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}
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pub struct CollisionPlugin;
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impl Plugin for CollisionPlugin {
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fn build(&self, app: &mut App) {
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app.init_resource::<HasCollided>()
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.add_systems(Update, check_collision.after(move_player));
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}
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}
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