7 files changed, 13 insertions, 16 deletions
diff --git a/src/content/entities/entity_grenade.rs b/src/content/entities/entity_grenade.rs
index ab7aaa4..c13c239 100644
--- a/src/content/entities/entity_grenade.rs
+++ b/src/content/entities/entity_grenade.rs
@@ -20,7 +20,7 @@ impl EntityBehaviour for GrenadeEntityBehaviour {
         update_ctx: &mut EntityUpdateCtx,
         ctx: &mut SimCtx,
         delta_time: f32,
-    ) -> () {
+    ) {
         self.fuse -= delta_time;
         if self.fuse <= 0.0 {
             apply_explosion(
diff --git a/src/content/materials/liquid.rs b/src/content/materials/liquid.rs
index 6c3bdcd..23ba0fe 100644
--- a/src/content/materials/liquid.rs
+++ b/src/content/materials/liquid.rs
@@ -57,7 +57,7 @@ pub fn sim_update(ctx: &mut UpdateCtx) -> PostUpdateAction {
         }
     }
 
-    return PostUpdateAction::Settle;
+    PostUpdateAction::Settle
 
     // we didn't find a hole, so just move "randomly" on the same surface
     // TODO when to settle?
diff --git a/src/renderer/mod.rs b/src/renderer/mod.rs
index c2e541b..29bd779 100644
--- a/src/renderer/mod.rs
+++ b/src/renderer/mod.rs
@@ -13,7 +13,6 @@ use crate::{
     renderer::ui::draw_egui,
     sim::{
         cell_manager::manager::CellManager,
-        entity::Entity,
         rb_manager::debug_render::DebugVertex,
         sim_manager::{SimCtx, SimManager},
     },
@@ -747,7 +746,7 @@ impl RendererState {
             for (id, slot) in &self.renderer_rb_entities {
                 if let Some(entity) = sim.entities.get(id)
                     && let Some(cells) = &entity.data.cells
-                    && let Some((pos, (cos, sin))) = entity.data.transform(&mut SimCtx {
+                    && let Some((pos, (cos, sin))) = entity.data.transform(&SimCtx {
                         cell_manager: &mut sim.cell_manager,
                         particle_manager: &mut sim.particle_manager,
                         rb_manager: &mut sim.rb_manager,
diff --git a/src/sim/cell/cell.rs b/src/sim/cell/cell.rs
index 6c6e704..be2cfad 100644
--- a/src/sim/cell/cell.rs
+++ b/src/sim/cell/cell.rs
@@ -22,11 +22,11 @@ impl Cell {
     }
     #[inline]
     pub fn match_parity(&mut self, seqno: u64) {
-        let parity = seqno % 2 != 0;
+        let parity = !seqno.is_multiple_of(2);
         if parity {
             self.flags |= Self::FLAG_PARITY;
         } else {
-            self.flags = self.flags & !Self::FLAG_PARITY
+            self.flags &= !Self::FLAG_PARITY
         }
     }
 
@@ -39,7 +39,7 @@ impl Cell {
         if rb {
             self.flags |= Self::FLAG_ENTITY
         } else {
-            self.flags = self.flags & !Self::FLAG_ENTITY
+            self.flags &= !Self::FLAG_ENTITY
         }
     }
 
diff --git a/src/sim/entity/mod.rs b/src/sim/entity/mod.rs
index 4a79bf4..d8a03e0 100644
--- a/src/sim/entity/mod.rs
+++ b/src/sim/entity/mod.rs
@@ -48,14 +48,14 @@ pub trait EntityBehaviour {
         _update_ctx: &mut EntityUpdateCtx,
         _ctx: &mut SimCtx,
         _delta_time: f32,
-    ) -> () {
+    ) {
     }
     fn physics_update(
         &mut self,
         _update_ctx: &mut EntityUpdateCtx,
         _ctx: &mut SimCtx,
         _delta_time: f32,
-    ) -> () {
+    ) {
     }
 }
 
@@ -131,7 +131,7 @@ impl<'a> EntityUpdateCtx<'a> {
 impl EntityData {
     pub fn transform(&self, ctx: &SimCtx) -> Option<(Vec2, (f32, f32))> {
         self.rb_h
-            .map(|rb_h| {
+            .and_then(|rb_h| {
                 ctx.rb_manager
                     .physics_manager
                     .rigid_body_set
@@ -143,7 +143,6 @@ impl EntityData {
                         )
                     })
             })
-            .flatten()
     }
 }
 
diff --git a/src/sim/lib/force.rs b/src/sim/lib/force.rs
index 39b7904..db8e076 100644
--- a/src/sim/lib/force.rs
+++ b/src/sim/lib/force.rs
@@ -20,7 +20,7 @@ pub fn apply_explosion(
         }
         let dir = (pos - centre) / d;
         let falloff = 1.0 - (d / radius as f32);
-        return (force_offset + dir) * force_multiplier * random_range(0.5..1.5) * falloff;
+        (force_offset + dir) * force_multiplier * random_range(0.5..1.5) * falloff
     };
 
     // cell grid
diff --git a/src/sim/sim_manager/mod.rs b/src/sim/sim_manager/mod.rs
index 8f47761..805d152 100644
--- a/src/sim/sim_manager/mod.rs
+++ b/src/sim/sim_manager/mod.rs
@@ -164,13 +164,12 @@ impl SimManager {
                 rb_manager: &mut self.rb_manager,
                 particle_manager: &mut self.particle_manager,
             };
-            if let Some(entity) = entity {
-                if let Some(result) = entity.physics_update(&mut ctx, delta_time) {
+            if let Some(entity) = entity
+                && let Some(result) = entity.physics_update(&mut ctx, delta_time) {
                     for d in result.deferred_destructions {
                         self.destroy_entity(d);
                     }
                 }
-            }
         }
 
         // before we move the rigidbodies, upsert the current terrain state
@@ -197,7 +196,7 @@ impl SimManager {
             .tick(&mut self.cell_manager, delta_time);
     }
 
-    pub fn update(&mut self, config: &Config, delta_time: f32) -> () {
+    pub fn update(&mut self, config: &Config, delta_time: f32) {
         let entity_ids: Vec<u32> = self.entities.keys().cloned().collect();
         for id in entity_ids {
             if let Some(entity) = self.entities.get_mut(&id) {