all systems updated to take parameters rather than world

src/systems/snow.rs

@@ -1,11 +1,40 @@
-use crate::world::World;
+use crate::components::camera::CameraComponent;
+use crate::components::FollowComponent;
+use crate::render::snow::SnowLayer;
+use crate::utility::transform::Transform;
+use crate::world::Storage;
 
-pub fn snow_system(world: &mut World)
+pub fn snow_system(
+    cameras: &Storage<CameraComponent>,
+    transforms: &Storage<Transform>,
+    player_tags: &Storage<()>,
+    follows: &Storage<FollowComponent>,
+    snow_layer: &mut Option<SnowLayer>,
+)
 {
-    let camera_pos = world.active_camera_position();
-    let player_pos = world.player_position();
-    let is_following = world.camera_is_following();
-    if let Some(ref mut snow_layer) = world.snow_layer
+    let camera_pos = cameras
+        .components
+        .iter()
+        .find(|(_, cam)| cam.is_active)
+        .and_then(|(e, _)| transforms.get(*e))
+        .map(|t| t.position)
+        .unwrap_or(glam::Vec3::ZERO);
+
+    let player_pos = player_tags
+        .all()
+        .first()
+        .and_then(|e| transforms.get(*e))
+        .map(|t| t.position)
+        .unwrap_or(glam::Vec3::ZERO);
+
+    let is_following = cameras
+        .components
+        .iter()
+        .find(|(_, cam)| cam.is_active)
+        .map(|(e, _)| follows.get(*e).is_some())
+        .unwrap_or(false);
+
+    if let Some(ref mut snow_layer) = snow_layer
     {
         if is_following
         {