Huge input update, FPS Camera controls system

Long day. I now store winit:🪟:Window in a mutex.

engine/src/systems/fps_camera.rs

@@ -0,0 +1,114 @@
+use crate::system::{System, SystemContext};
+use glam::{Quat, Vec3};
+use winit::event::DeviceEvent::MouseMotion;
+use winit::event::{ElementState, Event, MouseButton, WindowEvent};
+use winit::keyboard::PhysicalKey;
+use winit::window::CursorGrabMode;
+use raidillon_assets::model_path;
+use raidillon_platform::Camera;
+
+pub struct FPSCameraSystem {
+    mouse_delta: (f64, f64),
+    mouse_enabled: bool,
+    position: Vec3,
+    yaw:   f32,
+    pitch: f32,
+    speed: f32,
+    sensitivity: f32,
+}
+
+impl Default for FPSCameraSystem {
+    fn default() -> Self {
+        Self {
+            mouse_delta: Default::default(),
+            mouse_enabled: Default::default(),
+            position: Vec3::new(0.0, 0.0, 2.0),
+            yaw: -90.0,
+            pitch: 0.0,
+            speed: 3.0,
+            sensitivity: 0.1,
+        }
+    }
+}
+
+impl System for FPSCameraSystem {
+    fn load_world(&mut self, ctx: &mut SystemContext) {
+        ctx.scene.world.spawn((Camera {
+            eye:    Vec3::new(0.0, 0.0, 2.0),
+            center: Vec3::ZERO,
+            up:     Vec3::Y,
+            fovy:   60_f32.to_radians(),
+            aspect: ctx.platform_context.frame_width / ctx.platform_context.frame_height,
+            znear:  0.1,
+            zfar:   100.0,
+        },));
+    }
+
+    fn handle_event(&mut self, ctx: &mut SystemContext) {
+        let event2 = ctx.platform_context.current_event.clone();
+        match event2 {
+            Event::DeviceEvent { device_id, event} => {
+                match event {
+                    MouseMotion { delta } => {
+                        self.mouse_delta.0 += delta.0;
+                        self.mouse_delta.1 += delta.1;
+                    },
+                    _ => {}
+                }
+            },
+            Event::WindowEvent { event, .. } => match event {
+                WindowEvent::MouseInput { state, button, .. } => {
+                    if button == MouseButton::Right {
+                        // blood and tear
+                        let window = ctx.platform_context.window.lock().unwrap();
+                        match state {
+                            ElementState::Pressed => {
+                                if window
+                                    .set_cursor_grab(CursorGrabMode::Confined)
+                                    .or_else(|_| window.set_cursor_grab(CursorGrabMode::Locked))
+                                    .is_ok()
+                                {
+                                    window.set_cursor_visible(false);
+                                    self.mouse_enabled = true;
+                                }
+                            }
+                            ElementState::Released => {
+                                let _ = window.set_cursor_grab(CursorGrabMode::None);
+                                window.set_cursor_visible(true);
+                                self.mouse_enabled = false;
+                            }
+                        }
+                    }
+                }
+                _ => {},
+            },
+            _ => {},
+        }
+    }
+
+    fn frame_update(&mut self, ctx: &mut SystemContext) {
+        if self.mouse_enabled {
+            self.yaw += self.mouse_delta.0 as f32 * self.sensitivity;
+            self.pitch -= self.mouse_delta.1 as f32 * self.sensitivity;
+            self.pitch = self.pitch.clamp(-89.0, 89.0);
+        }
+
+        ctx.scene.world.query_mut::<&mut Camera>().into_iter().for_each(|(_, camera)| {
+            camera.eye = self.position;
+            camera.center = self.position + self.front();
+        });
+        self.mouse_delta = (0.0, 0.0);
+    }
+}
+
+impl FPSCameraSystem {
+    pub fn front(&self) -> Vec3 {
+        let yaw_rad   = self.yaw.to_radians();
+        let pitch_rad = self.pitch.to_radians();
+        Vec3::new(
+            yaw_rad.cos() * pitch_rad.cos(),
+            pitch_rad.sin(),
+            yaw_rad.sin() * pitch_rad.cos(),
+        ).normalize()
+    }
+}