wip: engine enhancements and fixes

game/src/main.rs

@@ -1,14 +1,39 @@
-use raidillon_core::{Engine, Scene};
-use raidillon_platform::Platform;
+use glam::Vec3;
+use raidillon_core::{Engine, Scene, System};
+use raidillon_core::system::SystemContext;
+use raidillon_platform::{Platform, Camera};
 
 #[cfg(feature = "glium")]
 use raidillon_glium::GliumPlatform;
 
+const RENDERING_TEST_SYSTEM: &str = "rendering_test_system";
+struct RenderingTestSystem;
+
+impl System for RenderingTestSystem {
+    fn initialize(&mut self) {}
+    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: 1920 as f32 / 1080 as f32, // FIXME
+            znear:  0.1,
+            zfar:   100.0,
+        },));
+
+        // TODO: Load a sample glTF file
+    }
+
+    fn update(&mut self, ctx: &mut SystemContext) {}
+}
+
 fn main() {
     let mut engine = Engine::new();
     // Define systems
     // engine.system_manager.add_system("spawn_chunks".to_string(), ChunkSystem);
     // engine.system_manager.add_system("movement".to_string(), MovementSystem);
+    engine.system_manager.add_system(RENDERING_TEST_SYSTEM, Box::new(RenderingTestSystem));
 
     // Set up the scene
     let main_scene_id = "Main".to_owned();