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