--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rust/hwrunner/src/main.rs	Wed Jul 31 23:14:27 2019 +0200
@@ -0,0 +1,108 @@
+use glutin::{
+    dpi, ContextTrait, DeviceEvent, ElementState, Event, EventsLoop, GlProfile, GlRequest,
+    MouseButton, MouseScrollDelta, WindowEvent, WindowedContext,
+};
+
+use hedgewars_engine::instance::EngineInstance;
+
+use integral_geometry::Point;
+use std::time::Duration;
+
+fn init(event_loop: &EventsLoop, size: dpi::LogicalSize) -> WindowedContext {
+    use glutin::{ContextBuilder, WindowBuilder};
+
+    let window = WindowBuilder::new()
+        .with_title("hwengine")
+        .with_dimensions(size);
+
+    let cxt = ContextBuilder::new()
+        .with_gl(GlRequest::Latest)
+        .with_gl_profile(GlProfile::Core)
+        .build_windowed(window, &event_loop)
+        .ok()
+        .unwrap();
+
+    unsafe {
+        cxt.make_current().unwrap();
+        gl::load_with(|ptr| cxt.get_proc_address(ptr) as *const _);
+
+        if let Some(sz) = cxt.get_inner_size() {
+            let phys = sz.to_physical(cxt.get_hidpi_factor());
+
+            gl::Viewport(0, 0, phys.width as i32, phys.height as i32);
+        }
+    }
+
+    cxt
+}
+
+fn main() {
+    let mut event_loop = EventsLoop::new();
+    let (w, h) = (1024.0, 768.0);
+    let window = init(&event_loop, dpi::LogicalSize::new(w, h));
+
+    let mut engine = EngineInstance::new();
+    engine.world.create_renderer(w as u16, h as u16);
+
+    let mut dragging = false;
+
+    use std::time::Instant;
+
+    let mut now = Instant::now();
+    let mut update = Instant::now();
+
+    let mut is_running = true;
+    while is_running {
+        let curr = Instant::now();
+        let delta = curr - now;
+        now = curr;
+        let ms = delta.as_secs() as f64 * 1000.0 + delta.subsec_millis() as f64;
+        window.set_title(&format!("hwengine {:.3}ms", ms));
+
+        if update.elapsed() > Duration::from_millis(10) {
+            update = curr;
+            engine.world.step()
+        }
+
+        event_loop.poll_events(|event| match event {
+            Event::WindowEvent { event, .. } => match event {
+                WindowEvent::CloseRequested => {
+                    is_running = false;
+                }
+                WindowEvent::MouseInput { button, state, .. } => {
+                    if let MouseButton::Right = button {
+                        dragging = state == ElementState::Pressed;
+                    }
+                }
+
+                WindowEvent::MouseWheel { delta, .. } => {
+                    let zoom_change = match delta {
+                        MouseScrollDelta::LineDelta(x, y) => y as f32 * 0.1f32,
+                        MouseScrollDelta::PixelDelta(delta) => {
+                            let physical = delta.to_physical(window.get_hidpi_factor());
+                            physical.y as f32 * 0.1f32
+                        }
+                    };
+                    engine.world.move_camera(Point::ZERO, zoom_change);
+                }
+                _ => (),
+            },
+            Event::DeviceEvent { event, .. } => match event {
+                DeviceEvent::MouseMotion { delta } => {
+                    if dragging {
+                        engine
+                            .world
+                            .move_camera(Point::new(delta.0 as i32, delta.1 as i32), 0.0)
+                    }
+                }
+                _ => {}
+            },
+            _ => (),
+        });
+
+        unsafe { window.make_current().unwrap() };
+
+        engine.render();
+        window.swap_buffers().unwrap();
+    }
+}