rm type-id-test-rs
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type-id-test-rs/.gitignore
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type-id-test-rs/.gitignore
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/target
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type-id-test-rs/Cargo.lock
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type-id-test-rs/Cargo.lock
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# This file is automatically @generated by Cargo.
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# It is not intended for manual editing.
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version = 3
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[[package]]
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name = "component-macro"
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version = "0.1.0"
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dependencies = [
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"quote",
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"syn",
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]
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[[package]]
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name = "proc-macro2"
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version = "1.0.79"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "e835ff2298f5721608eb1a980ecaee1aef2c132bf95ecc026a11b7bf3c01c02e"
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dependencies = [
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"unicode-ident",
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]
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[[package]]
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name = "quote"
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version = "1.0.35"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "291ec9ab5efd934aaf503a6466c5d5251535d108ee747472c3977cc5acc868ef"
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dependencies = [
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"proc-macro2",
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]
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[[package]]
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name = "syn"
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version = "2.0.58"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "44cfb93f38070beee36b3fef7d4f5a16f27751d94b187b666a5cc5e9b0d30687"
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dependencies = [
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"proc-macro2",
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"quote",
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"unicode-ident",
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]
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[[package]]
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name = "type-id-test-rs"
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version = "0.1.0"
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dependencies = [
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"component-macro",
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]
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[[package]]
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name = "unicode-ident"
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version = "1.0.12"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "3354b9ac3fae1ff6755cb6db53683adb661634f67557942dea4facebec0fee4b"
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[package]
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name = "type-id-test-rs"
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version = "0.1.0"
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edition = "2021"
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# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
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[dependencies]
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component-macro = { version = "0.1.0", path = "./component-macro" }
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use std::any::{Any, TypeId};
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pub trait Component {
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fn inner_type_id(&self) -> TypeId;
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fn as_any(&mut self) -> &mut dyn Any;
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}
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#![allow(dead_code)]
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use std::any::{Any, TypeId};
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use component::Component;
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use component_macro::Component;
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mod component;
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struct Context<'a> {
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entities: &'a mut Vec<(u64, Vec<Box<dyn Component>>)>,
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}
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impl<'a> Context<'a> {
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pub fn entities_with_component<T: 'static>(&self) -> Vec<u64> {
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let entity_type_id = TypeId::of::<T>();
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self.entities
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.iter()
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.filter_map(|(id, components)| {
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let contains_component = components.iter().any(|entity| {
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let is_id = (*entity).inner_type_id() == entity_type_id;
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is_id
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});
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if contains_component {
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Some(*id)
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} else {
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None
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}
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})
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.collect()
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}
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pub fn entity_component<T: 'static>(&mut self, entity_id: u64) -> &mut T {
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let entity_type_id = TypeId::of::<T>();
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let (_id, components) = self
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.entities
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.iter_mut()
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.find(|(id, _)| *id == entity_id)
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.unwrap();
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let component = components
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.iter_mut()
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.find_map(|entity| {
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let is_id = (*entity).inner_type_id() == entity_type_id;
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if is_id {
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Some(entity.as_any().downcast_mut::<T>().unwrap())
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} else {
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None
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}
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})
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.unwrap();
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component
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}
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}
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trait System {
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fn on_update(&self, context: &mut Context);
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}
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#[derive(Component)]
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struct Position {
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pub x: i32,
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pub y: i32,
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}
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#[derive(Component)]
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struct NotPosition {
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pub a: i32,
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pub b: i32,
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}
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struct Gravity;
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struct NotGravity;
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impl System for Gravity {
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fn on_update(&self, context: &mut Context) {
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let entities_with_position = context.entities_with_component::<Position>();
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for entity_id in entities_with_position {
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let position = context.entity_component::<Position>(entity_id);
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position.y -= 1;
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}
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}
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}
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impl System for NotGravity {
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fn on_update(&self, context: &mut Context) {
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let entities_with_position = context.entities_with_component::<NotPosition>();
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for entity_id in entities_with_position {
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let position = context.entity_component::<NotPosition>(entity_id);
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position.a -= 1;
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}
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}
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}
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fn main() {
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let mut entities: Vec<(u64, Vec<Box<dyn Component>>)> = Vec::new();
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let mut systems: Vec<Box<dyn System>> = Vec::new();
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systems.push(Box::new(Gravity));
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systems.push(Box::new(NotGravity));
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entities.push((
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0,
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vec![
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Box::new(Position { x: 0, y: 0 }),
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Box::new(NotPosition { a: 0, b: 0 }),
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],
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));
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entities.push((
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1,
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vec![
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Box::new(Position { x: 0, y: 0 }),
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Box::new(NotPosition { a: 0, b: 0 }),
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],
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));
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let mut context = Context {
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entities: &mut entities,
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};
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for system in systems {
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system.on_update(&mut context)
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}
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}
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