diff options
Diffstat (limited to 'ecs/examples/multiple_queries.rs')
| -rw-r--r-- | ecs/examples/multiple_queries.rs | 85 |
1 files changed, 0 insertions, 85 deletions
diff --git a/ecs/examples/multiple_queries.rs b/ecs/examples/multiple_queries.rs deleted file mode 100644 index e0c957f..0000000 --- a/ecs/examples/multiple_queries.rs +++ /dev/null @@ -1,85 +0,0 @@ -use std::fmt::Display; - -use ecs::phase::START as START_PHASE; -use ecs::{Component, Query, World}; - -#[derive(Component)] -struct Health -{ - health: u32, -} - -#[derive(Component)] -enum AttackStrength -{ - Strong, - Weak, -} - -#[derive(Component)] -struct EnemyName -{ - name: String, -} - -impl Display for EnemyName -{ - fn fmt(&self, formatter: &mut std::fmt::Formatter<'_>) -> std::fmt::Result - { - self.name.fmt(formatter) - } -} - -fn do_attacks( - attacker_query: Query<(&AttackStrength,)>, - enemy_query: Query<(&mut Health, &EnemyName)>, -) -{ - for (attack_strength,) in &attacker_query { - for (mut health, enemy_name) in &enemy_query { - let damage = match *attack_strength { - AttackStrength::Strong => 20, - AttackStrength::Weak => 10, - }; - - if health.health <= damage { - println!("Enemy '{}' died", *enemy_name); - - health.health = 0; - - continue; - } - - health.health -= damage; - - println!("Enemy '{}' took {damage} damage", *enemy_name); - } - } -} - -fn main() -{ - let mut world = World::new(); - - world.register_system(*START_PHASE, do_attacks); - - world.create_entity(( - Health { health: 100 }, - EnemyName { name: "Big spider".to_string() }, - )); - - world.create_entity(( - Health { health: 30 }, - EnemyName { name: "Small goblin".to_string() }, - )); - - world.create_entity(( - Health { health: 30 }, - EnemyName { name: "Headcrab".to_string() }, - )); - - world.create_entity((AttackStrength::Strong,)); - world.create_entity((AttackStrength::Weak,)); - - world.step(); -} |
