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//! Primitives for creating and controlling [`Window`](struct.Window.html).
use glutin;
use glutin::GlContext;
use mint;
use render;
use camera::Camera;
use factory::Factory;
use input::Input;
use render::Renderer;
use scene::Scene;
use std::path::PathBuf;
pub use glutin::CursorState;
/// `Window` is the core entity of every `three-rs` application.
///
/// It provides [user input](struct.Window.html#method.update),
/// [`Factory`](struct.Factory.html) and [`Renderer`](struct.Renderer.html).
pub struct Window {
event_loop: glutin::EventsLoop,
window: glutin::GlWindow,
/// See [`Input`](struct.Input.html).
pub input: Input,
/// See [`Renderer`](struct.Renderer.html).
pub renderer: Renderer,
/// See [`Factory`](struct.Factory.html).
pub factory: Factory,
/// See [`Scene`](struct.Scene.html).
pub scene: Scene,
/// Reset input on each frame? See [`Input::reset`](struct.Input.html#method.reset).
///
/// Defaults to `true`.
pub reset_input: bool,
}
/// Builder for creating new [`Window`](struct.Window.html) with desired parameters.
#[derive(Debug, Clone)]
pub struct Builder {
dimensions: (u32, u32),
fullscreen: bool,
multisampling: u16,
shader_directory: Option<PathBuf>,
title: String,
vsync: bool,
}
impl Builder {
/// Set the size of the viewport (the resolution) in pixels. Defaults to 1024x768.
pub fn dimensions(
&mut self,
width: u32,
height: u32,
) -> &mut Self {
self.dimensions = (width, height);
self
}
/// Whether enable fullscreen mode or not. Defauls to `false`.
pub fn fullscreen(
&mut self,
option: bool,
) -> &mut Self {
self.fullscreen = option;
self
}
/// Sets the multisampling level to request. A value of `0` indicates that multisampling must
/// not be enabled. Must be the power of 2. Defaults to `0`.
pub fn multisampling(
&mut self,
option: u16,
) -> &mut Self {
self.multisampling = option;
self
}
/// Specifies the user shader directory.
pub fn shader_directory<P: Into<PathBuf>>(
&mut self,
option: P,
) -> &mut Self {
self.shader_directory = Some(option.into());
self
}
/// Whether to enable vertical synchronization or not. Defaults to `true`.
pub fn vsync(
&mut self,
option: bool,
) -> &mut Self {
self.vsync = option;
self
}
/// Create new `Window` with desired parameters.
pub fn build(&mut self) -> Window {
let event_loop = glutin::EventsLoop::new();
let monitor_id = if self.fullscreen {
Some(event_loop.get_primary_monitor())
} else {
None
};
let builder = glutin::WindowBuilder::new()
.with_fullscreen(monitor_id)
.with_dimensions(self.dimensions.0, self.dimensions.1)
.with_title(self.title.clone());
let context = glutin::ContextBuilder::new()
.with_vsync(self.vsync)
.with_multisampling(self.multisampling);
let mut source_set = render::source::Set::default();
if let Some(path) = self.shader_directory.as_ref() {
let path = path.to_str().unwrap();
macro_rules! try_override {
($name:ident) => {
match render::Source::user(path, stringify!($name), "vs") {
Ok(src) => {
info!("Overriding {}_vs.glsl", stringify!($name));
source_set.$name.vs = src;
}
Err(err) => {
error!("{:#?}", err);
info!("Using default {}_vs.glsl", stringify!($name));
}
}
match render::Source::user(path, stringify!($name), "ps") {
Ok(src) => {
info!("Overriding {}_ps.glsl", stringify!($name));
source_set.$name.ps = src;
}
Err(err) => {
error!("{:#?}", err);
info!("Using default {}_ps.glsl", stringify!($name));
}
}
};
( $($name:ident,)* ) => {
$( try_override!($name); )*
};
}
try_override!(basic, gouraud, pbr, phong, quad, shadow, skybox, sprite,);
}
let (renderer, window, mut factory) = Renderer::new(builder, context, &event_loop, &source_set);
let scene = factory.scene();
Window {
event_loop,
window,
input: Input::new(),
renderer,
factory,
scene,
reset_input: true,
}
}
}
impl Window {
/// Create a new window with default parameters.
pub fn new<T: Into<String>>(title: T) -> Self {
Self::builder(title).build()
}
/// Create new `Builder` with standard parameters.
pub fn builder<T: Into<String>>(title: T) -> Builder {
Builder {
dimensions: (1024, 768),
fullscreen: false,
multisampling: 0,
shader_directory: None,
title: title.into(),
vsync: true,
}
}
/// `update` method returns `false` if the window was closed.
pub fn update(&mut self) -> bool {
let mut running = true;
let renderer = &mut self.renderer;
let input = &mut self.input;
if self.reset_input {
input.reset();
}
self.window.swap_buffers().unwrap();
let window = &self.window;
self.event_loop.poll_events(|event| {
use glutin::WindowEvent::{Closed, Focused, KeyboardInput, MouseInput, CursorMoved, MouseWheel, Resized};
match event {
glutin::Event::WindowEvent { event, .. } => match event {
Resized(..) => renderer.resize(window),
Focused(state) => input.window_focus(state),
Closed => running = false,
KeyboardInput {
input: glutin::KeyboardInput {
state,
virtual_keycode: Some(keycode),
..
},
..
} => input.keyboard_input(state, keycode),
MouseInput { state, button, .. } => input.mouse_input(state, button),
CursorMoved {
position: (x, y), ..
} => input.mouse_moved(
[x as f32, y as f32].into(),
renderer.map_to_ndc([x as f32, y as f32]),
),
MouseWheel { delta, .. } => input.mouse_wheel_input(delta),
_ => {}
},
glutin::Event::DeviceEvent { event, .. } => match event {
glutin::DeviceEvent::Motion { axis, value } => {
input.axis_moved_raw(axis as u8, value as f32);
}
_ => {}
},
_ => {}
}
});
running
}
/// Render the current scene with specific [`Camera`](struct.Camera.html).
pub fn render(
&mut self,
camera: &Camera,
) {
self.renderer.render(&self.scene, camera);
}
/// Get current window size in pixels.
pub fn size(&self) -> mint::Vector2<f32> {
let size = self.window
.get_inner_size()
.expect("Can't get window size");
[size.0 as f32, size.1 as f32].into()
}
/// Sets how the cursor should be handled.
///
/// See the documentation for [`CursorState`] for the possible cursor states.
///
/// Note that if you use [`CursorState::Grab`], you should use [`Input::mouse_delta_raw`] for
/// detecting mouse movement, as [`Input::mouse_delta`] will only report movement of the cursor
/// within the window.
///
/// [`CursorState`]: enum.CursorState.html
/// [`CursorState::Grab`]: enum.CursorState.html#variant.Grab
/// [`Input::mouse_delta_raw`]: struct.Input.html#method.mouse_delta_raw
/// [`Input::mouse_delta`]: struct.Input.html#method.mouse_delta_raw
pub fn set_cursor_state(&self, state: CursorState) {
let _ = self.window.set_cursor_state(state);
}
/// Returns underlaying `glutin::GlWindow`.
#[cfg(feature = "opengl")]
pub fn glutin_window(&self) -> &glutin::GlWindow {
&self.window
}
}