diff --git a/glc/src/matrix.rs b/glc/src/matrix.rs
index 8c64763..e7b7fe2 100644
--- a/glc/src/matrix.rs
+++ b/glc/src/matrix.rs
@@ -284,7 +284,8 @@ where
     }
 
     #[inline]
-    pub fn translate(v: Vector2<T>) -> Self {
+    pub fn translate<V: Into<Vector2<T>>>(v: V) -> Self {
+        let v = V::into(v);
         let one = T::one();
         let zro = T::zero();
 
@@ -378,7 +379,8 @@ where
     T: Float,
 {
     #[inline]
-    pub fn translate(v: Vector3<T>) -> Self {
+    pub fn translate<V: Into<Vector3<T>>>(v: V) -> Self {
+        let v = V::into(v);
         let one = T::one();
         let zero = T::zero();
 
@@ -391,7 +393,8 @@ where
     }
 
     #[inline]
-    pub fn scale(v: Vector3<T>) -> Self {
+    pub fn scale<V: Into<Vector3<T>>>(v: V) -> Self {
+        let v = V::into(v);
         let one = T::one();
         let zero = T::zero();
 
@@ -405,8 +408,8 @@ where
 
     #[inline]
     #[allow(clippy::many_single_char_names)]
-    pub fn rotate(axis: Vector3<T>, angle: Angle<T>) -> Self {
-        let axis = axis.normalize();
+    pub fn rotate<V: Into<Vector3<T>>>(axis: V, angle: Angle<T>) -> Self {
+        let axis = V::into(axis).normalize();
         let x = axis.x;
         let y = axis.y;
         let z = axis.z;
diff --git a/glc/src/vector.rs b/glc/src/vector.rs
index 9ab2b58..5733bb4 100644
--- a/glc/src/vector.rs
+++ b/glc/src/vector.rs
@@ -2,7 +2,7 @@
 
 use std::convert::{AsMut, AsRef};
 use std::fmt::{Debug, Formatter, Result as FmtResult};
-use std::ops::{Add, Deref, DerefMut, Mul, Sub};
+use std::ops::{Add, Deref, DerefMut, Mul, Neg, Sub};
 
 #[cfg(feature = "serde")]
 use serde::{
@@ -296,6 +296,21 @@ where
     }
 }
 
+impl<T> Neg for Vector2<T>
+where
+    T: Numeric,
+{
+    type Output = Self;
+
+    #[inline]
+    fn neg(self) -> Self::Output {
+        Self {
+            x: -self.x,
+            y: -self.y,
+        }
+    }
+}
+
 impl<T> Add for Vector2<T>
 where
     T: Numeric,
@@ -350,6 +365,15 @@ where
     }
 }
 
+impl<T> From<Vector3<T>> for Vector2<T>
+where
+    T: Numeric,
+{
+    fn from(vec3: Vector3<T>) -> Self {
+        vec3.into_vec2()
+    }
+}
+
 impl<T> From<Vector4<T>> for Vector2<T>
 where
     T: Numeric,
@@ -408,6 +432,19 @@ where
             z: self.x * other.y - self.y * other.x,
         }
     }
+
+    #[inline]
+    pub fn as_vec2(&self) -> &Vector2<T> {
+        unsafe { &*(self as *const Vector3<T> as *const Vector2<T>) }
+    }
+
+    #[inline]
+    pub fn into_vec2(self) -> Vector2<T> {
+        Vector2 {
+            x: self.x,
+            y: self.y,
+        }
+    }
 }
 
 impl<T> Vector3<T>
@@ -424,6 +461,22 @@ where
     }
 }
 
+impl<T> Neg for Vector3<T>
+where
+    T: Numeric,
+{
+    type Output = Self;
+
+    #[inline]
+    fn neg(self) -> Self::Output {
+        Self {
+            x: -self.x,
+            y: -self.y,
+            z: -self.z,
+        }
+    }
+}
+
 impl<T> Add for Vector3<T>
 where
     T: Numeric,
@@ -480,6 +533,28 @@ where
     }
 }
 
+impl<T> From<Vector2<T>> for Vector3<T>
+where
+    T: Numeric,
+{
+    fn from(vec2: Vector2<T>) -> Self {
+        Self {
+            x: vec2.x,
+            y: vec2.y,
+            z: T::zero(),
+        }
+    }
+}
+
+impl<T> From<Vector4<T>> for Vector3<T>
+where
+    T: Numeric,
+{
+    fn from(vec4: Vector4<T>) -> Self {
+        vec4.into_vec3()
+    }
+}
+
 /* Vector4 */
 
 impl<T> Vector4<T>
diff --git a/space-crush-app/src/debug/summary.rs b/space-crush-app/src/debug/summary.rs
index fd48985..742fe8c 100644
--- a/space-crush-app/src/debug/summary.rs
+++ b/space-crush-app/src/debug/summary.rs
@@ -1,5 +1,6 @@
 use std::string::ToString;
 
+use glc::vector::Vector2f;
 use space_crush_common::{misc::LogResult, resources::Global};
 use specs::{prelude::*, Entities, ReadExpect, System};
 
@@ -15,8 +16,8 @@ pub struct Summary {
     cache: TextCache,
     text: Text,
     fps: usize,
-    resolution: (u32, u32),
-    mouse_pos: (f32, f32),
+    resolution: Vector2f,
+    mouse_pos: Vector2f,
     entity_count: usize,
 }
 
@@ -44,8 +45,8 @@ impl Summary {
             cache,
             text,
             fps: 0,
-            resolution: (0, 0),
-            mouse_pos: (0.0, 0.0),
+            resolution: Default::default(),
+            mouse_pos: Default::default(),
             entity_count: 0,
         })
     }
@@ -83,14 +84,14 @@ impl<'a> System<'a> for Summary {
             4,
             &mut self.resolution,
             &input_state.resolution,
-            |(w, h)| format!("{} | {}", w, h),
+            |v| unsafe { format!("{:.0} | {:.0}", v.x, v.y) },
         );
         update_text(
             &mut self.text,
             6,
             &mut self.mouse_pos,
             &input_state.mouse_pos,
-            |(x, y)| format!("{:.2} | {:.2}", x, y),
+            |v| unsafe { format!("{:.2} | {:.2}", v.x, v.y) },
         );
         update_text(
             &mut self.text,
diff --git a/space-crush-app/src/render/init.rs b/space-crush-app/src/render/init.rs
index a4a3ae7..fc6c8b7 100644
--- a/space-crush-app/src/render/init.rs
+++ b/space-crush-app/src/render/init.rs
@@ -2,7 +2,7 @@ use glc::{
     matrix::Matrix4f,
     misc::Bindable,
     shader::{Program, Type},
-    vector::Vector3f,
+    vector::{Vector2f, Vector3f},
 };
 use shrev::{EventChannel, ReaderId};
 use space_crush_common::{
@@ -20,7 +20,7 @@ use crate::{
 
 pub struct Init {
     program: Program,
-    resolution: (u32, u32),
+    resolution: Vector2f,
     mouse_event_id: ReaderId<MouseEvent>,
 }
 
@@ -30,7 +30,7 @@ impl Init {
             (Type::Vertex, "resources/shader/noise/vert.glsl"),
             (Type::Fragment, "resources/shader/noise/frag.glsl"),
         ])?;
-        let resolution = (0, 0);
+        let resolution = Vector2f::default();
         let mouse_event_id = world.register_event_reader::<MouseEvent>()?;
 
         world
@@ -80,31 +80,30 @@ impl<'a> System<'a> for Init {
         if self.resolution != input_state.resolution {
             self.resolution = input_state.resolution;
 
-            gl::viewport(0, 0, self.resolution.0 as _, self.resolution.1 as _);
+            gl::viewport(0, 0, self.resolution.x as _, self.resolution.y as _);
 
             camera
-                .resize(self.resolution.0 as _, self.resolution.1 as _)
+                .resize(self.resolution.x, self.resolution.y)
                 .error("Error while updating camera");
         }
 
         /* zoom */
-        let mouse_pos = &input_state.mouse_pos;
         let events = mouse_events.read(&mut self.mouse_event_id);
         for event in events {
             match event {
                 MouseEvent::ScrollY(delta) => {
                     let s = config.input.camera_zoom_speed;
                     let z = s / (s - delta);
-                    let m = Matrix4f::translate((mouse_pos.0, mouse_pos.1, 0.0).into())
-                        * Matrix4f::scale(z.into())
-                        * Matrix4f::translate((-mouse_pos.0, -mouse_pos.1, 0.0).into());
+                    let m = Matrix4f::translate(input_state.mouse_pos)
+                        * Matrix4f::scale(z)
+                        * Matrix4f::translate(-input_state.mouse_pos);
 
                     camera
                         .update_with(move |v| m * v)
                         .error("Error while zooming camera");
                 }
                 MouseEvent::Delta(x, y) if input_state.button_state(&[MouseButton::Right]) => {
-                    let m = Matrix4f::translate((*x, -*y, 0.0).into());
+                    let m = Matrix4f::translate((*x, -*y, 0.0));
 
                     camera
                         .update_with(move |v| m * v)
diff --git a/space-crush-app/src/render/select_fleet.rs b/space-crush-app/src/render/select_fleet.rs
index be2462d..e31b654 100644
--- a/space-crush-app/src/render/select_fleet.rs
+++ b/space-crush-app/src/render/select_fleet.rs
@@ -14,6 +14,7 @@ use space_crush_common::{
     constants::VECTOR_2F_POS_X,
     misc::{LogResult, WorldHelper as _},
     resources::Global,
+    return_if_none,
 };
 use specs::{prelude::*, Entities, ReadExpect, ReadStorage, System, World};
 
@@ -44,9 +45,9 @@ pub struct SelectFleet {
     mouse_event_id: ReaderId<MouseEvent>,
     select_mode: SelectMode,
     camera_counter: usize,
-    camera_view_invert: Matrix4f,
     need_value_update: bool,
     values_changed_once: bool,
+    is_new_selection: bool,
 
     mouse_pos: Vector2f,
     count: ShipCount,
@@ -69,7 +70,7 @@ enum SelectMode {
 }
 
 #[derive(SystemData)]
-pub struct SelectFleetData<'a> {
+pub struct FleetSelectData<'a> {
     player_state: WriteExpect<'a, PlayerState>,
     camera: ReadExpect<'a, Camera>,
 
@@ -85,33 +86,24 @@ pub struct SelectFleetData<'a> {
     fleets: ReadStorage<'a, Fleet>,
 }
 
-macro_rules! unwrap {
-    ($value:expr) => {
-        match $value {
-            Some(value) => value,
-            None => return,
-        }
-    };
-}
-
 macro_rules! selection {
     (&$data:expr) => {
-        unwrap!(&$data.player_state.selection)
+        return_if_none!(&$data.player_state.selection)
     };
     (&mut $data:expr) => {
-        unwrap!(&mut $data.player_state.selection)
+        return_if_none!(&mut $data.player_state.selection)
     };
 }
 
 macro_rules! fleet_info {
     (&$data:expr, $id:expr) => {
-        unwrap!($data.fleet_infos.get($id))
+        return_if_none!($data.fleet_infos.get($id))
     };
 }
 
 macro_rules! position {
     (&$data:expr, $id:expr) => {
-        unwrap!($data.positions.get($id))
+        return_if_none!($data.positions.get($id))
     };
 }
 
@@ -157,9 +149,9 @@ impl SelectFleet {
             mouse_event_id,
             select_mode,
             camera_counter: 0,
-            camera_view_invert: Default::default(),
             need_value_update: true,
             values_changed_once: false,
+            is_new_selection: true,
 
             mouse_pos: Default::default(),
             count: Default::default(),
@@ -172,39 +164,46 @@ impl SelectFleet {
         })
     }
 
-    fn update_camera(&mut self, d: &SelectFleetData<'_>) {
+    fn update_camera(&mut self, d: &FleetSelectData<'_>) {
         let camera_counter = d.camera.update_counter();
 
         if self.camera_counter != camera_counter {
             self.camera_counter = camera_counter;
             self.need_value_update = true;
-            self.camera_view_invert = d.camera.view().invert();
         }
     }
 
-    fn handle_events(&mut self, d: &mut SelectFleetData<'_>) {
+    fn handle_events(&mut self, d: &mut FleetSelectData<'_>) {
         let events = d.mouse_events.read(&mut self.mouse_event_id);
         for event in events {
             match event {
                 MouseEvent::ButtonDown(button) if button == &d.config.input.fleet_select_button => {
-                    let pos = self.window_to_world(d.input_state.mouse_pos);
+                    let pos = d.camera.view_to_world(d.input_state.mouse_pos);
                     let selection = d.player_state.selection.take();
                     for (id, position, fleet) in (&d.entities, &d.positions, &d.fleets).join() {
                         let r = fleet.orbit_max * fleet.orbit_max;
                         if (position.pos - pos).length_sqr() <= r {
                             d.player_state.selection = match selection {
-                                Some(s) if s.fleet == id => Some(s),
-                                _ => Some(Selection {
-                                    fleet: id,
-                                    count: ShipCount::all(),
-                                }),
+                                Some(s) if s.fleet == id => {
+                                    self.is_new_selection = false;
+
+                                    Some(s)
+                                }
+                                _ => {
+                                    self.is_new_selection = true;
+
+                                    Some(Selection {
+                                        fleet: id,
+                                        count: ShipCount::none(),
+                                    })
+                                }
                             };
 
                             let selection = selection!(&d);
                             let fleet_info = fleet_info!(&d, selection.fleet);
                             let timeout = Instant::now() + FLEET_SELECT_DETAIL_TIMEOUT;
 
-                            self.mouse_pos = d.input_state.mouse_pos.into();
+                            self.mouse_pos = d.input_state.mouse_pos;
                             self.select_mode = SelectMode::Init(timeout);
                             self.values_changed_once = false;
                             self.set_count(selection.count, &fleet_info.count);
@@ -218,36 +217,41 @@ impl SelectFleet {
                         SelectMode::Simple(progress) => {
                             selection!(&mut d).count = self.count;
 
-                            self.mouse_pos = d.input_state.mouse_pos.into();
+                            self.mouse_pos = d.input_state.mouse_pos;
 
                             SelectMode::SimpleClose(progress)
                         }
                         SelectMode::Detail(progress) => {
                             selection!(&mut d).count = self.count;
 
-                            self.mouse_pos = d.input_state.mouse_pos.into();
+                            self.mouse_pos = d.input_state.mouse_pos;
 
                             SelectMode::DetailClose(progress)
                         }
+                        SelectMode::Init(_) if self.is_new_selection => {
+                            selection!(&mut d).count = ShipCount::all();
+
+                            SelectMode::None
+                        }
                         _ => SelectMode::None,
                     }
                 }
                 MouseEvent::Move(_, _) if self.select_mode.is_init() => {
                     self.need_value_update = true;
                     self.values_changed_once = false;
-                    self.mouse_pos = d.input_state.mouse_pos.into();
+                    self.mouse_pos = d.input_state.mouse_pos;
                     self.select_mode = SelectMode::Simple(0.0);
                 }
                 MouseEvent::Move(_, _) if self.select_mode.is_active() => {
                     self.need_value_update = true;
-                    self.mouse_pos = d.input_state.mouse_pos.into();
+                    self.mouse_pos = d.input_state.mouse_pos;
                 }
                 _ => (),
             }
         }
     }
 
-    fn update(&mut self, d: &SelectFleetData<'_>) {
+    fn update(&mut self, d: &FleetSelectData<'_>) {
         if !self.select_mode.is_active() {
             return;
         }
@@ -261,7 +265,7 @@ impl SelectFleet {
         let position = position!(&d, selection.fleet);
         let fleet_info = fleet_info!(&d, selection.fleet);
 
-        self.marker = self.window_to_world(self.mouse_pos) - position.pos;
+        self.marker = d.camera.view_to_world(self.mouse_pos) - position.pos;
         self.zoom = d.camera.view().axis_x.as_vec3().length();
         self.shape_size = position.shape.radius().unwrap_or(0.0);
         self.ring0 = self.shape_size + FLEET_SELECT_OFFSET / self.zoom;
@@ -400,7 +404,7 @@ impl SelectFleet {
         }
     }
 
-    fn render(&mut self, progress: f32, d: &SelectFleetData<'_>) {
+    fn render(&mut self, progress: f32, d: &FleetSelectData<'_>) {
         /* select program */
         let is_simple = self.select_mode.is_simple();
         let program = if is_simple {
@@ -500,15 +504,11 @@ impl SelectFleet {
         self.values[3] = sum / total_max;
     }
 
-    fn window_to_world<T: Into<Vector2f>>(&self, pos: T) -> Vector2f {
-        (self.camera_view_invert * T::into(pos).into_vec4()).into_vec2()
-    }
-
     fn text_pos<T: Into<Vector2f>>(
         &self,
         dir: T,
         fleet_pos: Vector2f,
-        d: &SelectFleetData<'_>,
+        d: &FleetSelectData<'_>,
     ) -> Vector2f {
         let text_offset = self.ring1 + FLEET_SELECT_TEXT_OFFSET / self.zoom.sqrt();
         let pos = fleet_pos + T::into(dir).normalize() * text_offset;
@@ -518,7 +518,7 @@ impl SelectFleet {
 }
 
 impl<'a> System<'a> for SelectFleet {
-    type SystemData = SelectFleetData<'a>;
+    type SystemData = FleetSelectData<'a>;
 
     fn run(&mut self, mut data: Self::SystemData) {
         self.update_camera(&data);
diff --git a/space-crush-app/src/resources/camera.rs b/space-crush-app/src/resources/camera.rs
index e55fd52..b58a7d1 100644
--- a/space-crush-app/src/resources/camera.rs
+++ b/space-crush-app/src/resources/camera.rs
@@ -10,6 +10,8 @@ use glc::{
 pub struct Camera {
     buffer: ArrayBuffer,
     data: Data,
+    view_invert: Matrix4f,
+    projection_invert: Matrix4f,
     update_counter: usize,
 }
 
@@ -34,6 +36,8 @@ impl Camera {
         Ok(Self {
             buffer,
             data,
+            view_invert: Default::default(),
+            projection_invert: Default::default(),
             update_counter: 0,
         })
     }
@@ -42,10 +46,18 @@ impl Camera {
         &self.data.projection
     }
 
+    pub fn projection_invert(&self) -> &Matrix4f {
+        &self.projection_invert
+    }
+
     pub fn view(&self) -> &Matrix4f {
         &self.data.view
     }
 
+    pub fn view_invert(&self) -> &Matrix4f {
+        &self.view_invert
+    }
+
     pub fn update_counter(&self) -> usize {
         self.update_counter
     }
@@ -63,6 +75,7 @@ impl Camera {
         data[0].size = self.data.size;
 
         self.update_counter = self.update_counter.wrapping_add(1);
+        self.projection_invert = self.data.projection.invert();
 
         Ok(())
     }
@@ -81,6 +94,7 @@ impl Camera {
         data[0].view = self.data.view;
 
         self.update_counter = self.update_counter.wrapping_add(1);
+        self.view_invert = self.data.view.invert();
 
         Ok(())
     }
@@ -89,11 +103,43 @@ impl Camera {
         Error::checked(|| self.buffer.bind_buffer_base(index))
     }
 
+    pub fn world_to_view<T: Into<Vector2f>>(&self, pos: T) -> Vector2f {
+        self.data.view.transform(T::into(pos)).into()
+    }
+
+    pub fn view_to_world<T: Into<Vector2f>>(&self, pos: T) -> Vector2f {
+        self.view_invert.transform(T::into(pos)).into()
+    }
+
+    pub fn view_to_window<T: Into<Vector2f>>(&self, pos: T) -> Vector2f {
+        view_to_window(&self.data.size, pos)
+    }
+
+    pub fn window_to_view<T: Into<Vector2f>>(&self, pos: T) -> Vector2f {
+        window_to_view(&self.data.size, pos)
+    }
+
     pub fn world_to_window<T: Into<Vector2f>>(&self, pos: T) -> Vector2f {
-        let mut pos = self.data.view.transform(T::into(pos)).into_vec2();
-        pos.x += self.data.size.x / 2.0;
-        pos.y = self.data.size.y / 2.0 - pos.y;
+        self.view_to_window(self.world_to_view(pos))
+    }
 
-        pos
+    pub fn window_to_world<T: Into<Vector2f>>(&self, pos: T) -> Vector2f {
+        self.view_to_world(self.window_to_view(pos))
     }
 }
+
+pub fn view_to_window<T: Into<Vector2f>>(res: &Vector2f, pos: T) -> Vector2f {
+    let mut pos = T::into(pos);
+    pos.x += res.x / 2.0;
+    pos.y = res.y / 2.0 - pos.y;
+
+    pos
+}
+
+pub fn window_to_view<T: Into<Vector2f>>(res: &Vector2f, pos: T) -> Vector2f {
+    let mut pos = T::into(pos);
+    pos.x -= res.x / 2.0;
+    pos.y = res.y / 2.0 - pos.y;
+
+    pos
+}
diff --git a/space-crush-app/src/resources/input_state.rs b/space-crush-app/src/resources/input_state.rs
index 3e41ed6..08a1b77 100644
--- a/space-crush-app/src/resources/input_state.rs
+++ b/space-crush-app/src/resources/input_state.rs
@@ -3,12 +3,14 @@
 use std::collections::HashSet;
 use std::iter::IntoIterator;
 
+use glc::vector::Vector2f;
+
 use crate::misc::{MouseButton, VirtualKeyCode};
 
 #[derive(Default)]
 pub struct InputState {
-    pub mouse_pos: (f32, f32),
-    pub resolution: (u32, u32),
+    pub mouse_pos: Vector2f,
+    pub resolution: Vector2f,
     pub close_requested: bool,
     pub key_states: HashSet<VirtualKeyCode>,
     pub button_states: HashSet<MouseButton>,
diff --git a/space-crush-app/src/resources/mod.rs b/space-crush-app/src/resources/mod.rs
index bab60da..4a7c387 100644
--- a/space-crush-app/src/resources/mod.rs
+++ b/space-crush-app/src/resources/mod.rs
@@ -1,9 +1,9 @@
-mod camera;
-mod config;
-mod geometry;
-mod input_state;
-mod player_state;
-mod uniform;
+pub mod camera;
+pub mod config;
+pub mod geometry;
+pub mod input_state;
+pub mod player_state;
+pub mod uniform;
 
 pub use camera::Camera;
 pub use config::Config;
diff --git a/space-crush-app/src/systems/state_update.rs b/space-crush-app/src/systems/state_update.rs
index 9c245a7..ae165e5 100644
--- a/space-crush-app/src/systems/state_update.rs
+++ b/space-crush-app/src/systems/state_update.rs
@@ -4,7 +4,7 @@ use specs::{prelude::*, ReadExpect, System, World, Write};
 
 use crate::{
     misc::{KeyboardEvent, MouseEvent, WindowEvent},
-    resources::InputState,
+    resources::{camera::window_to_view, InputState},
     Error,
 };
 
@@ -51,10 +51,7 @@ impl<'a> System<'a> for StateUpdate {
         for event in events {
             match event {
                 MouseEvent::Move(x, y) => {
-                    let x = *x - input_state.resolution.0 as f32 / 2.0;
-                    let y = input_state.resolution.1 as f32 / 2.0 - *y;
-
-                    input_state.mouse_pos = (x, y);
+                    input_state.mouse_pos = window_to_view(&input_state.resolution, (*x, *y))
                 }
                 MouseEvent::ButtonUp(button) => input_state.set_button_state(*button, false),
                 MouseEvent::ButtonDown(button) => input_state.set_button_state(*button, true),
@@ -66,7 +63,7 @@ impl<'a> System<'a> for StateUpdate {
         for event in events {
             match event {
                 WindowEvent::Resize(w, h) => {
-                    input_state.resolution = (*w, *h);
+                    input_state.resolution = (*w as f32, *h as f32).into();
                 }
                 WindowEvent::Close => {
                     input_state.close_requested = true;
diff --git a/space-crush-common/src/components/ship.rs b/space-crush-common/src/components/ship.rs
index 9d3c558..32b5110 100644
--- a/space-crush-common/src/components/ship.rs
+++ b/space-crush-common/src/components/ship.rs
@@ -40,6 +40,14 @@ impl Count {
         }
     }
 
+    pub fn none() -> Self {
+        Self {
+            fighter: 0,
+            bomber: 0,
+            transporter: 0,
+        }
+    }
+
     pub fn total(&self) -> usize {
         self.fighter
             .saturating_add(self.bomber)
diff --git a/space-crush-common/src/lib.rs b/space-crush-common/src/lib.rs
index d072147..232c20c 100644
--- a/space-crush-common/src/lib.rs
+++ b/space-crush-common/src/lib.rs
@@ -2,6 +2,7 @@ pub mod components;
 pub mod constants;
 pub mod dispatcher;
 pub mod error;
+pub mod macros;
 pub mod misc;
 pub mod resources;
 pub mod systems;
diff --git a/space-crush-common/src/macros.rs b/space-crush-common/src/macros.rs
new file mode 100644
index 0000000..893317a
--- /dev/null
+++ b/space-crush-common/src/macros.rs
@@ -0,0 +1,19 @@
+#[macro_export]
+macro_rules! return_if_none {
+    ($value:expr) => {
+        match $value {
+            Some(value) => value,
+            None => return,
+        }
+    };
+}
+
+#[macro_export]
+macro_rules! break_if_none {
+    ($value:expr) => {
+        match $value {
+            Some(value) => value,
+            None => break,
+        }
+    };
+}