ECS test

.gitignore

@@ -8,3 +8,8 @@ Cargo.lock
 
 # These are backup files generated by rustfmt
 **/*.rs.bk
+
+
+# Added by cargo
+
+/target

Cargo.toml

@@ -0,0 +1,9 @@
+[package]
+name = "slipwave"
+version = "0.1.0"
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+hypoloop = "0.1.7"

src/lib.rs

@@ -0,0 +1,22 @@
+pub mod state {
+    pub struct Health(pub i32);
+    pub struct Name(pub &'static str);
+
+    pub struct World {
+        pub health_components: Vec<Option<Health>>,
+        pub name_components: Vec<Option<Name>>,
+    }
+    impl World {
+        pub fn new() -> Self {
+            Self {
+                health_components: Vec::new(),
+                name_components: Vec::new(),
+            }
+        }
+
+        pub fn new_entity(&mut self, health: Option<Health>, name: Option<Name>) {
+            self.health_components.push(health);
+            self.name_components.push(name);
+        }
+    }
+}

src/main.rs

@@ -0,0 +1,60 @@
+use hypoloop::core::{State, Loop};
+use slipwave::state::{World, Health, Name};
+
+fn main() {
+    // create a new sim loop
+    let mut sim = Loop::new();
+    sim.set_update_interval(20);
+
+    // create the game world
+    let mut world = World::new();
+
+    // add entities to the game world
+    // Icarus's health is *not* looking good.
+    world.new_entity(Some(Health(-10)), Some(Name("Icarus"))); 
+
+    // Prometheus is very healthy.
+    world.new_entity(Some(Health(100)), Some(Name("Prometheus"))); 
+
+    // Note that Zeus does not have a `Health` component.
+    world.new_entity(None, Some(Name("Zeus"))); 
+
+    // create a closure containing your update logic
+    let mut tick = move |state: &mut State| {    
+        let zip = world
+            .health_components
+            .iter()
+            .zip(world.name_components.iter());
+
+        let with_health_and_name =
+            zip.filter_map(|(health, name): (&Option<Health>, &Option<Name>)| {
+                Some((health.as_ref()?, name.as_ref()?))
+            });
+
+        // health system
+        for (health, name) in with_health_and_name {
+            if health.0 < 0 {
+                println!("{} has perished!", name.0);
+            } else {
+                println!("{} is still alive!", name.0);
+            }
+        }
+
+
+        // print information about the current tick's timings
+        state.debug_time();
+    };
+    
+    // create a closure containing your display logic
+    let mut display = move |state: &mut State| {
+        //
+    };
+
+    // run the simulation with your user-defined update and display logic
+    // initialize the sim (cleans internal clocks, etc.)
+    sim.init();
+    loop {
+        // "step" the sim forward
+        sim.step(&mut tick, &mut display);
+    }
+}