input: Refactor all previous states

src/core/input/cache.rs

@@ -0,0 +1,86 @@
+use std::{
+    collections::HashMap,
+    hash::Hash,
+    ops::{Add, AddAssign, Sub},
+};
+
+use winit::event::ElementState;
+
+pub struct CachedElementState<K: Eq + Hash> {
+    cache: HashMap<K, ElementState>,
+}
+
+impl<K: Eq + Hash> Default for CachedElementState<K> {
+    fn default() -> Self {
+        Self {
+            cache: HashMap::new(),
+        }
+    }
+}
+
+impl<K: Eq + Hash> CachedElementState<K> {
+    pub fn set_key_state(&mut self, key: K, state: ElementState) -> Option<ElementState> {
+        let key_state = self.cache.get(&key);
+        let new_key_state = match key_state {
+            Some(old) => match state {
+                ElementState::Pressed => match old {
+                    ElementState::Released => Some(ElementState::Pressed),
+                    ElementState::Pressed => None,
+                },
+                ElementState::Released => match old {
+                    ElementState::Released => None,
+                    ElementState::Pressed => Some(ElementState::Released),
+                },
+            },
+            None => match state {
+                ElementState::Pressed => Some(ElementState::Pressed),
+                ElementState::Released => Some(ElementState::Released),
+            },
+        };
+        if let Some(new_key_state) = new_key_state {
+            self.cache.insert(key, new_key_state);
+        }
+        new_key_state
+    }
+}
+
+#[derive(Default)]
+pub struct CachedMovement<T>
+where
+    T: Sub<Output = T> + Add<Output = T> + Default + Copy,
+{
+    pub old_value: Option<T>,
+    pub value: T,
+}
+
+impl<T> CachedMovement<T>
+where
+    T: Sub<Output = T> + Add<Output = T> + Default + Copy,
+{
+    pub fn set_value(&mut self, value: T) {
+        self.value = value;
+    }
+
+    pub fn reset(&mut self) -> T {
+        match self.old_value.as_ref() {
+            Some(old_value) => {
+                let diff = self.value - *old_value;
+                self.old_value = Some(self.value);
+                diff
+            }
+            None => {
+                self.old_value = Some(self.value);
+                T::default()
+            }
+        }
+    }
+}
+
+impl<T> AddAssign<T> for CachedMovement<T>
+where
+    T: Add<Output = T> + Sub<Output = T> + Default + Copy,
+{
+    fn add_assign(&mut self, rhs: T) {
+        self.value = self.value + rhs;
+    }
+}

src/core/input/keyboard_state.rs

@@ -1,25 +0,0 @@
-use egui_winit_vulkano::egui::ahash::HashMap;
-use winit::{
-    event::{ElementState, WindowEvent},
-    keyboard::PhysicalKey,
-};
-
-use super::{process_new_element_state, virtual_input::VirtualInput};
-
-#[derive(Debug, Default)]
-pub struct KeyboardState {
-    key_states: HashMap<PhysicalKey, ElementState>,
-}
-
-impl KeyboardState {
-    pub fn process_window_event(&mut self, event: &WindowEvent, virtual_input: &mut VirtualInput) {
-        if let WindowEvent::KeyboardInput { event, .. } = event {
-            let key_state = self.key_states.get(&event.physical_key);
-            let new_key_state = process_new_element_state(key_state, event.state);
-            if let Some(new_key_state) = new_key_state {
-                self.key_states.insert(event.physical_key, new_key_state);
-                virtual_input.update_key_binding(event.physical_key, new_key_state);
-            }
-        }
-    }
-}

src/core/input/mod.rs

@@ -1,12 +1,13 @@
 use std::collections::HashMap;
 
-use keyboard_state::KeyboardState;
-use mouse_state::MouseState;
+use cache::{CachedElementState, CachedMovement};
 use virtual_input::VirtualInput;
-use winit::event::{ElementState, WindowEvent};
+use winit::{
+    event::{MouseButton, MouseScrollDelta, WindowEvent},
+    keyboard::PhysicalKey,
+};
 
-mod keyboard_state;
-mod mouse_state;
+mod cache;
 mod virtual_binding;
 mod virtual_input;
 mod virtual_state;
@@ -14,8 +15,10 @@ pub use virtual_binding::{AxisDirection, VirtualBinding};
 
 #[derive(Default)]
 pub struct InputManager {
-    keyboard_state: KeyboardState,
-    mouse_state: MouseState,
+    keys_state: CachedElementState<PhysicalKey>,
+    mouse_buttons_state: CachedElementState<MouseButton>,
+    mouse_position_delta: CachedMovement<glam::Vec2>,
+    mouse_wheel_delta: CachedMovement<glam::Vec2>,
     virtual_input: VirtualInput,
 }
 
@@ -41,18 +44,45 @@ impl InputManager {
             WindowEvent::AxisMotion { axis, value, .. } => {
                 self.virtual_input.update_axis_binding(*axis, *value as f32);
             }
-            _ => {
-                self.keyboard_state
-                    .process_window_event(event, &mut self.virtual_input);
-                self.mouse_state
-                    .process_window_event(event, &mut self.virtual_input);
+            WindowEvent::KeyboardInput { event, .. } => {
+                let new_key_state = self
+                    .keys_state
+                    .set_key_state(event.physical_key, event.state);
+                if let Some(new_key_state) = new_key_state {
+                    self.virtual_input
+                        .update_key_binding(event.physical_key, new_key_state);
+                }
             }
+            WindowEvent::CursorMoved { position, .. } => {
+                self.mouse_position_delta
+                    .set_value(glam::Vec2::new(position.x as f32, position.y as f32));
+            }
+            WindowEvent::MouseInput { button, state, .. } => {
+                let new_mouse_button_state =
+                    self.mouse_buttons_state.set_key_state(*button, *state);
+                if let Some(new_mouse_button_state) = new_mouse_button_state {
+                    self.virtual_input
+                        .update_mouse_button_binding(*button, new_mouse_button_state);
+                }
+            }
+            WindowEvent::MouseWheel { delta, .. } => {
+                self.mouse_wheel_delta += match delta {
+                    MouseScrollDelta::PixelDelta(position) => {
+                        glam::Vec2::new(position.x as f32, position.y as f32)
+                    }
+                    MouseScrollDelta::LineDelta(x, y) => glam::Vec2::new(*x as f32, *y as f32),
+                };
+            }
+            _ => {}
         }
     }
 
     /// Updates deltas before running update
     pub fn update(&mut self) {
-        self.mouse_state.update(&mut self.virtual_input);
+        self.virtual_input
+            .update_mouse_move_binding(&self.mouse_position_delta.reset());
+        self.virtual_input
+            .update_mouse_wheel_binding(&self.mouse_wheel_delta.reset());
     }
 
     pub fn get_virtual_input_state(&self, value_name: &str) -> f32 {
@@ -63,33 +93,3 @@ impl InputManager {
         self.virtual_input.add_bindings(value_name, bindings);
     }
 }
-
-/// Maps the old element state to the new element state.
-/// if is changed, returns Some(new_state), otherwise returns None
-#[inline]
-fn process_new_element_state(
-    old: Option<&ElementState>,
-    new: ElementState,
-) -> Option<ElementState> {
-    match old {
-        Some(old) => match new {
-            ElementState::Pressed => match old {
-                ElementState::Released => Some(ElementState::Pressed),
-                ElementState::Pressed => None,
-            },
-            ElementState::Released => match old {
-                ElementState::Released => None,
-                ElementState::Pressed => Some(ElementState::Released),
-            },
-        },
-        None => match new {
-            ElementState::Pressed => Some(ElementState::Pressed),
-            ElementState::Released => Some(ElementState::Released),
-        },
-    }
-}
-
-#[inline]
-fn process_axis_deadzone(value: f32, deadzone: f32) -> f32 {
-    if value.abs() < deadzone { 0.0 } else { value }
-}

src/core/input/mouse_state.rs

@@ -1,49 +0,0 @@
-use std::collections::HashMap;
-
-use winit::event::{ElementState, MouseButton, MouseScrollDelta, WindowEvent};
-
-use super::{process_new_element_state, virtual_input::VirtualInput};
-
-#[derive(Debug, Default)]
-pub struct MouseState {
-    old_position: glam::Vec2,
-    position: glam::Vec2,
-    delta: glam::Vec2,
-    wheel_delta: glam::Vec2,
-    mouse_button_state: HashMap<MouseButton, ElementState>,
-}
-
-impl MouseState {
-    pub fn process_window_event(&mut self, event: &WindowEvent, virtual_input: &mut VirtualInput) {
-        match event {
-            WindowEvent::CursorMoved { position, .. } => {
-                self.position = glam::Vec2::new(position.x as f32, position.y as f32);
-            }
-            WindowEvent::MouseWheel { delta, .. } => {
-                self.wheel_delta += match delta {
-                    MouseScrollDelta::PixelDelta(position) => {
-                        glam::Vec2::new(position.x as f32, position.y as f32)
-                    }
-                    MouseScrollDelta::LineDelta(x, y) => glam::Vec2::new(*x as f32, *y as f32),
-                };
-            }
-            WindowEvent::MouseInput { button, state, .. } => {
-                let key_state = self.mouse_button_state.get(button);
-                let new_key_state = process_new_element_state(key_state, *state);
-                if let Some(new_key_state) = new_key_state {
-                    self.mouse_button_state.insert(*button, new_key_state);
-                    virtual_input.update_mouse_button_binding(*button, new_key_state);
-                }
-            }
-            _ => {}
-        }
-    }
-
-    pub fn update(&mut self, virtual_input: &mut VirtualInput) {
-        self.delta = self.position - self.old_position;
-        self.old_position = self.position;
-        virtual_input.update_mouse_move_binding(&self.delta);
-        virtual_input.update_mouse_wheel_binding(&self.wheel_delta);
-        self.wheel_delta = glam::Vec2::ZERO;
-    }
-}

src/core/input/virtual_state.rs

@@ -3,7 +3,7 @@ use winit::{
     keyboard::PhysicalKey,
 };
 
-use super::{process_axis_deadzone, virtual_binding::VirtualBinding};
+use super::virtual_binding::VirtualBinding;
 
 pub struct VirtualBindingState {
     pub value: f32,
@@ -101,3 +101,8 @@ impl VirtualInputState {
         self.value = new_value;
     }
 }
+
+#[inline]
+fn process_axis_deadzone(value: f32, deadzone: f32) -> f32 {
+    if value.abs() < deadzone { 0.0 } else { value }
+}