work in progress platform

src/main.rs

@@ -3,6 +3,7 @@ mod camera;
 mod cash;
 mod gates;
 mod heads_ui;
+mod platforms;
 mod player;
 mod tb_entities;
 
@@ -66,6 +67,7 @@ fn main() {
     app.add_plugins(player::plugin);
     app.add_plugins(heads_ui::plugin);
     app.add_plugins(gates::plugin);
+    app.add_plugins(platforms::plugin);
 
     app.insert_resource(AmbientLight {
         color: Color::WHITE,

src/platforms.rs

@@ -0,0 +1,51 @@
+use crate::tb_entities::Platform;
+use bevy::{math::ops::sin, prelude::*};
+use bevy_trenchbroom::class::Target;
+
+#[derive(Component, Reflect, Default, Debug)]
+#[reflect(Component)]
+struct ActivePlatform {
+    pub start: Vec3,
+    pub target: Vec3,
+}
+
+pub fn plugin(app: &mut App) {
+    app.register_type::<ActivePlatform>();
+    app.add_systems(Update, (init, move_active));
+}
+
+fn init(
+    mut commands: Commands,
+    uninit_platforms: Query<
+        (Entity, &Target, &Transform),
+        (Without<ActivePlatform>, With<Platform>),
+    >,
+    // targets: Query<(&PlatformTarget, &Transform)>,
+) {
+    for (e, _target, transform) in uninit_platforms.iter() {
+        // let Some(target) = targets
+        //     .iter()
+        //     .find(|(t, _)| t.targetname == target.target.clone().unwrap_or_default())
+        //     .map(|(_, t)| *t)
+        // else {
+        //     continue;
+        // };
+
+        let platform = ActivePlatform {
+            start: transform.translation,
+            target: transform.translation + Vec3::new(0., 20., 0.),
+        };
+
+        info!("platform: {:?}", platform);
+
+        commands.entity(e).insert(platform);
+    }
+}
+
+fn move_active(time: Res<Time>, mut platforms: Query<(&mut Transform, &mut ActivePlatform)>) {
+    for (mut transform, active) in platforms.iter_mut() {
+        let t = (sin(time.elapsed_secs() * 0.5) + 1.) / 2.;
+
+        transform.translation = active.start.lerp(active.target, t);
+    }
+}

src/tb_entities.rs

@@ -60,7 +60,7 @@ pub struct Platform;
 #[reflect(Component)]
 #[require(Transform)]
 pub struct PlatformTarget {
-    targetname: String,
+    pub targetname: String,
 }
 
 #[derive(PointClass, Component, Reflect, Default)]