egui support

- New Resource, EguiQueue: Utility to queue egui ui builders
- New Rendering System, EguiRenderer: Utilizes a modified egui_glium
  library to render egui UI
- Adjusted RenderingSystem trait and RenderingContext structure to
  provide event_loop and egui_queue.
- Various minor adjusments

game/Cargo.toml

@@ -19,3 +19,4 @@ glam = "0.30.5"
 winit = "0.30.12"
 rapier3d = "0.30.1"
 hecs = "0.10.5"
+egui = "0.33.2"

game/src/main.rs

@@ -16,7 +16,7 @@ use raidillon_glium::GliumPlatform;
 use winit::event::{ElementState, Event, WindowEvent};
 use winit::event::DeviceEvent::MouseMotion;
 use winit::keyboard::{KeyCode, PhysicalKey};
-use raidillon_core::DebugUIBuffer;
+use raidillon_core::{DebugUIBuffer, EguiQueue};
 use systems::debug_camera::FPSDebugCameraSystem;
 use raidillon_glium::RenderingSystem;
 use raidillon_physics::Physics;
@@ -102,18 +102,30 @@ impl System for RenderingTestSystem {
     }
 
     fn frame_update(&mut self, res: &mut EngineResources, scene: &mut Scene) {
-        let pctx = res.get::<PlatformContext>().unwrap();
-        let input = res.get::<InputState>().unwrap();
-        let dbg_ui = scene.resources.get_mut::<DebugUIBuffer>().unwrap();
-
-        dbg_ui.text("Hello World!".to_owned());
-        dbg_ui.text(format!("Frame Delta: {}", pctx.time_ctx.frame_dt));
-        dbg_ui.text(format!("Fixed Delta: {}", pctx.time_ctx.fixed_dt));
-        dbg_ui.text(format!("FPS: {}", 1.0 / pctx.time_ctx.frame_dt));
+        let (
+            pctx,
+            input,
+        ) = res.get_many_mut::<(
+            PlatformContext,
+            InputState,
+        )>().unwrap();
 
+        let mut egui_queue = pctx.egui_queue.borrow_mut();
+        let time_ctx = pctx.time_ctx.clone();
+        let mut character_pos = Vec3::ZERO;
         for (_ent, (tr, ch_component)) in scene.world.query::<(&Transform, &CharacterBodyComponent)>().iter() {
-            dbg_ui.text(format!("Character POS: {}", tr.translation));
+            character_pos = tr.translation;
         }
+        egui_queue.queue(move |egui_ctx| {
+            egui::Window::new("Debug").show(egui_ctx, |ui| {
+                ui.label("Hello World!");
+                ui.label(format!("Frame Delta: {}", time_ctx.frame_dt));
+                ui.label(format!("Fixed Delta: {}", time_ctx.fixed_dt));
+                ui.label(format!("FPS: {}", 1.0 / time_ctx.frame_dt));
+                ui.label(format!("Character POS: {}", character_pos));
+            });
+        });
+
     }
 }