prototypes/life: the buttons all do things!

prototypes/src/bin/life.rs

@@ -161,11 +161,25 @@ fn setup(mut commands: Commands) {
     fn play_sim(_trigger: On<Pointer<Press>>, mut next: ResMut<NextState<SimulationState>>) {
         next.set(SimulationState::Run);
     }
-    fn zoom_out(trigger: On<Pointer<Press>>) {
-        todo!()
+    fn zoom_out(trigger: On<Pointer<Press>>, mut projection: Query<&mut Projection>) {
+        projection.iter_mut().for_each(|mut p| {
+            match *p {
+                Projection::Orthographic(ref mut o) => {
+                    o.scale /= 0.5;
+                }
+                _ => todo!()
+            }
+        });
     }
-    fn zoom_in(trigger: On<Pointer<Press>>) {
-        todo!()
+    fn zoom_in(trigger: On<Pointer<Press>>, mut projection: Query<&mut Projection>) {
+        projection.iter_mut().for_each(|mut p| {
+            match *p {
+                Projection::Orthographic(ref mut o) => {
+                    o.scale *= 0.5;
+                }
+                _ => todo!()
+            }
+        });
     }
 
     // Spawn Coordiantes
@@ -458,3 +472,7 @@ fn cooldown_secs(input: f32) -> impl FnMut(Local<Timer>, Res<Time>) -> bool + Cl
 
     }
 }
+
+// If in Run state, keep Run button light, or blinking or outlined or something.
+// If in Pause state, keep Pauses button light, or blinking or outlined or something.
+// TODO: How to get infinite tiling background...