Struct thin_engine::prelude::InputMap

source · 
pub struct InputMap<const BINDS: usize> {
    pub binds: [Vec<Input>; BINDS],
    pub pressing: [bool; BINDS],
    pub pressed: [bool; BINDS],
    pub released: [bool; BINDS],
    pub mouse_scroll: f32,
    pub mouse_move: Vec2,
    pub mouse_pos: Vec2,
    pub other_pressed: Option<Input>,
    pub text_typed: Option<String>,
}
Expand description

you can use anything that implements the Into<usize> trait as an action, but it’s recommended to use an action enum which derives ToUsize. input_map! macro reduces the boilerplate of this function

#[derive(ToUsize)] // could also manualy implement Into<usize>
enum Actions{
    Debug,
    Left,
    Right,
    Click
}
use winit::{event::*, keyboard::KeyCode, event_loop::*, window::Window};
use winit_input_map::*;
use Actions::*;

let mut input = InputMap::new([ // doesnt have to be in the same order as the enum
    (Debug, vec![Input::keycode(KeyCode::Space)]),
    (Click, vec![Input::Mouse(MouseButton::Left)]),
    (Left,  vec![Input::keycode(KeyCode::ArrowLeft), Input::keycode(KeyCode::KeyA)]),
    (Right, vec![Input::keycode(KeyCode::ArrowRight), Input::keycode(KeyCode::KeyD)]),
]);
 
let event_loop = EventLoop::new().unwrap();
event_loop.set_control_flow(ControlFlow::Poll);
let _window = Window::new(&event_loop).unwrap();

event_loop.run(|event, target|{
    input.update(&event);
    match &event {
        Event::WindowEvent { event: WindowEvent::CloseRequested, .. } => { target.exit() },
        Event::AboutToWait => {
            if input.pressed(Debug) { println!("pressed {:?}", input.binds(Debug)) }
            if input.pressing(Right) || input.pressing(Left) { 
                println!("axis: {}", input.axis(Right, Left)) 
            }
            if input.mouse_move != (0.0, 0.0) {
                println!("mouse moved: {:?} and is now at {:?}", input.mouse_move, input.mouse_pos)
            }
            if input.released(Click) { println!("released {:?}", input.binds(Click)) }
             
            std::thread::sleep(std::time::Duration::from_millis(100));
            //put at end of loop because were done with inputs this loop.
            input.init();
        }
        _ => ()
    }
}).unwrap();

Fields§

§binds: [Vec<Input>; BINDS]§pressing: [bool; BINDS]§pressed: [bool; BINDS]§released: [bool; BINDS]§mouse_scroll: f32

the amount the scroll wheel has changed

§mouse_move: Vec2§mouse_pos: Vec2§other_pressed: Option<Input>

last input even if it isnt in the binds. useful for rebinding.

§text_typed: Option<String>

the text typed this loop. useful for typing

Implementations§

source§

impl<const BINDS: usize> InputMap<BINDS>

source

pub fn new(binds: [(impl Into<usize>, Vec<Input>); BINDS]) -> InputMap<BINDS>

create new input system. recommended to use an action enum which implements the Into<usize> trait. the input_map! macro reduces boilerplate.

use Action::*;
use input::*;
use winit::keyboard::KeyCode;
#[derive(ToUsize)]
enum Action {
    Forward,
    Back,
    Left,
    Right
}
//doesnt have to be the same ordered as the enum.
let mut input = Input::new([
    (vec![Input::keycode(KeyCode::KeyW)], Forward),
    (vec![Input::keycode(KeyCode::KeyA)], Left),
    (vec![Input::keycode(KeyCode::KeyS)], Back),
    (vec![Input::keycode(KeyCode::KeyD)], Right)
]);
source

pub fn empty() -> InputMap<0>

use if you dont want to have any action. will still have access to everythin else

source

pub fn update(&mut self, event: &Event<()>)

updates the input using a winit event. make sure to call input.init() when your done with the input this loop.

use winit::{event::*, window::Window, event_loop::EventLoop};
use winit_input_map::InputMap;

let mut event_loop = EventLoop::new().unwrap();
event_loop.set_control_flow(winit::event_loop::ControlFlow::Poll);
let _window = Window::new(&event_loop).unwrap();

let mut input = input_map!();

event_loop.run(|event, target|{
    input.update(&event);
    match &event{
        Event::WindowEvent { event: WindowEvent::CloseRequested, .. } => target.exit(),
        Event::AboutToWait => input.init(),
        _ => ()
    }
});
source

pub fn init(&mut self)

initialise input. use when your done with input this loop. required to be called for everything except pressing and mouse_pos to work properly.

use winit::{event::*, window::Window, event_loop::EventLoop};
use winit_input_map::InputMap;

let mut event_loop = EventLoop::new().unwrap();
event_loop.set_control_flow(winit::event_loop::ControlFlow::Poll);
let _window = Window::new(&event_loop).unwrap();

let mut input = input_map!();

event_loop.run(|event, target| {
    input.update(&event);
    match &event{
        Event::WindowEvent { event: WindowEvent::CloseRequested, .. } => target.exit(),
        Event::AboutToWait => input.init(),
        _ => ()
    }
});
source

pub fn binds(&mut self, action: impl Into<usize>) -> &mut Vec<Input>

get binds of action. same as self.binds[action.into()]

source

pub fn pressing(&self, action: impl Into<usize>) -> bool

checks if action is being pressed currently. same as self.pressing[action.into()]

source

pub fn pressed(&self, action: impl Into<usize>) -> bool

checks if action was just pressed. same as self.pressed[action.into()]

Examples found in repository?
examples/simple.rs (line 61)
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fn main() {
    use Action::*;
    let (event_loop, window, display) = thin_engine::set_up().unwrap();
    window.set_title("Walk Test");
    let _ = window.set_cursor_grab(CursorGrabMode::Locked);
    window.set_cursor_visible(false);

    let mut input = input_map!(
        (Jump,    KeyCode::Space),
        (Exit,    KeyCode::Escape),
        (Left,    KeyCode::ArrowLeft,  KeyCode::KeyA),
        (Right,   KeyCode::ArrowRight, KeyCode::KeyD),
        (Forward, KeyCode::ArrowUp,    KeyCode::KeyW),
        (Back,    KeyCode::ArrowDown,  KeyCode::KeyS)
    );

    let (indices, verts, norms) = mesh!(
        &display, &teapot::INDICES, &teapot::VERTICES, &teapot::NORMALS
    );
    let draw_parameters = DrawParameters {
        backface_culling: draw_parameters::BackfaceCullingMode::CullClockwise,
        ..params::alias_3d()
    };
    let program = Program::from_source(
        &display, shaders::VERTEX,
        "#version 140
        out vec4 colour;
        in vec3 v_normal;
        uniform vec3 light;
        const vec3 albedo = vec3(0.1, 1.0, 0.3);
        void main(){
            float light_level = dot(light, v_normal);
            colour = vec4(albedo * light_level, 1.0);
        }", None,
    ).unwrap();

    let mut pos = vec3(0.0, 0.0, -30.0);
    let mut rot = vec2(0.0, 0.0);
    let mut gravity = 0.0;

    const DELTA: f32 = 0.016;

    thin_engine::run(event_loop, &mut input, |input, target| {
        display.resize(window.inner_size().into());
        let mut frame = display.draw();
        let view = Mat4::view_matrix_3d(frame.get_dimensions(), 1.0, 1024.0, 0.1);

        //handle gravity and jump
        gravity += DELTA * 9.5;
        if input.pressed(Jump) {
            gravity = -10.0;
        }

        //set camera rotation
        rot += input.mouse_move.scale(DELTA * 2.0);
        rot.y = rot.y.clamp(-PI / 2.0, PI / 2.0);
        let rx = Quaternion::from_y_rot(rot.x);
        let ry = Quaternion::from_x_rot(rot.y);
        let rot = rx * ry;

        //move player based on view and gravity
        let x = input.axis(Right, Left);
        let y = input.axis(Forward, Back);
        let move_dir = vec3(x, 0.0, y).normalise();
        pos += move_dir.transform(&Mat3::from_rot(rx)).scale(5.0 * DELTA);
        pos.y = (pos.y - gravity * DELTA).max(0.0);

        if input.pressed(Exit) { target.exit() }

        frame.clear_color_and_depth((0.0, 0.0, 0.0, 1.0), 1.0);
        //draw teapot
        frame.draw(
            (&verts, &norms), &indices,
            &program, &uniform! {
                view: view,
                model: Mat4::from_scale(Vec3::splat(0.1)),
                camera: Mat4::from_inverse_transform(pos, Vec3::ONE, rot),
                light: vec3(1.0, -0.9, -1.0).normalise()
            },
            &draw_parameters,
        ).unwrap();

        frame.finish().unwrap();
        thread::sleep(Duration::from_millis(16));
    }).unwrap();
}
More examples
Hide additional examples
examples/simple-fxaa.rs (line 95)
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fn main() {
    use Action::*;
    let (event_loop, window, display) = thin_engine::set_up().unwrap();
    window.set_title("FXAA Test");
    let _ = window.set_cursor_grab(CursorGrabMode::Locked);
    window.set_cursor_visible(false);

    let mut colour = ResizableTexture2D::default();
    let mut depth = ResizableDepthTexture2D::default();

    let mut input = input_map!(
        (Left,    KeyCode::ArrowLeft,  KeyCode::KeyA),
        (Right,   KeyCode::ArrowRight, KeyCode::KeyD),
        (Forward, KeyCode::ArrowUp,    KeyCode::KeyW),
        (Back,    KeyCode::ArrowDown,  KeyCode::KeyS),
        (FXAA,    KeyCode::KeyF),
        (Jump,    KeyCode::Space)
    );
    let (screen_indices, verts, uvs) = mesh!(
        &display, &screen::INDICES, &screen::VERTICES, &screen::UVS
    );
    let screen_mesh = (&verts, &uvs);
    let (indices, verts, norms) = mesh!(
        &display, &teapot::INDICES, &teapot::VERTICES, &teapot::NORMALS
    );
    let teapot_mesh = (&verts, &norms);
    let draw_parameters = DrawParameters {
        backface_culling: draw_parameters::BackfaceCullingMode::CullClockwise,
        ..params::alias_3d()
    };
    let mut fxaa_on = true;
    let program = Program::from_source(
        &display, shaders::VERTEX,
        "#version 140
        out vec4 colour;
        in vec3 v_normal;
        uniform vec3 light;
        uniform mat4 camera;
        uniform vec3 ambient;
        uniform vec3 albedo;
        uniform float shine;
        void main() {
            vec3 camera_dir = inverse(mat3(camera)) * vec3(0, 0, -1);
            vec3 half_dir = normalize(camera_dir + light);
            float specular = pow(max(dot(half_dir, v_normal), 0.0), shine);
            float light_level = max(dot(light, v_normal), 0.0);
            colour = vec4(albedo * light_level + ambient + vec3(specular), 1.0);
        }", None
    ).unwrap();
    let normal = Program::from_source(
        &display, shaders::SCREEN_VERTEX, 
        "#version 140
        in vec2 uv;
        uniform sampler2D tex;
        out vec4 colour;
        void main() {
            colour = texture(tex, uv);
        }", None
    ).unwrap();
    let fxaa = shaders::fxaa_shader(&display).unwrap();
    
    let mut pos = vec3(0.0, 0.0, -30.0);
    let mut rot = vec2(0.0, 0.0);
    const DELTA: f32 = 0.016;

    thin_engine::run(event_loop, &mut input, |input, _| {
        // using a small resolution to show the effect.
        // `let size = window.inner_size().into();` 
        // can be used instead to set resolution to window size
        let size = (380, 216);
        display.resize(size);
        depth.resize_to_display(&display);
        colour.resize_to_display(&display);

        //press f to toggle FXAA
        if input.pressed(FXAA) { fxaa_on = !fxaa_on }

        let colour = colour.texture.as_ref().unwrap();
        let depth = depth.texture.as_ref().unwrap();
        let mut frame = SimpleFrameBuffer::with_depth_buffer(
            &display, colour, depth
        ).unwrap();

        let view = Mat4::view_matrix_3d(size, 1.0, 1024.0, 0.1);

        //set camera rotation
        rot += input.mouse_move.scale(DELTA * 2.0);
        rot.y = rot.y.clamp(-PI / 2.0, PI / 2.0);
        let rx = Quaternion::from_y_rot(rot.x);
        let ry = Quaternion::from_x_rot(rot.y);
        let rot = rx * ry;

        //move player based on view
        let x = input.axis(Right, Left);
        let y = input.axis(Forward, Back);
        let move_dir = vec3(x, 0.0, y).normalise().scale(5.0*DELTA);
        pos += move_dir.transform(&Mat3::from_rot(rx));

        frame.clear_color_and_depth((0.0, 0.0, 0.0, 1.0), 1.0);
        //draw teapot
        frame.draw(
            teapot_mesh, &indices,
            &program, &uniform! {
                view: view,
                model: Mat4::from_scale(Vec3::splat(0.1)),
                camera: Mat4::from_inverse_transform(pos, Vec3::ONE, rot),
                light: vec3(0.1, 0.25, -1.0).normalise(),
                albedo: vec3(0.5, 0.1, 0.4),
                ambient: vec3(0.0, 0.05, 0.1),
                shine: 50.0f32,
            },
            &draw_parameters,
        ).unwrap();

        let mut frame = display.draw();
        frame.draw(
            screen_mesh, &screen_indices, if fxaa_on { &fxaa } else { &normal },
            &shaders::fxaa_uniforms(colour), &DrawParameters::default()
        ).unwrap();
        frame.finish().unwrap();
        thread::sleep(Duration::from_millis(16));
    }).unwrap();
}
source

pub fn released(&self, action: impl Into<usize>) -> bool

checks if action was just released. same as self.released[action.into()]

source

pub fn axis(&self, pos: impl Into<usize>, neg: impl Into<usize>) -> f32

returns 1.0 if pos is pressed, -1.0 if neg is pressed or 0.0 if either pos and neg or nothing is pressed. usefull for movement controls.

let move_dir = (input.axis(Right, Left), input.axis(Up, Down));
Examples found in repository?
examples/simple.rs (line 73)
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fn main() {
    use Action::*;
    let (event_loop, window, display) = thin_engine::set_up().unwrap();
    window.set_title("Walk Test");
    let _ = window.set_cursor_grab(CursorGrabMode::Locked);
    window.set_cursor_visible(false);

    let mut input = input_map!(
        (Jump,    KeyCode::Space),
        (Exit,    KeyCode::Escape),
        (Left,    KeyCode::ArrowLeft,  KeyCode::KeyA),
        (Right,   KeyCode::ArrowRight, KeyCode::KeyD),
        (Forward, KeyCode::ArrowUp,    KeyCode::KeyW),
        (Back,    KeyCode::ArrowDown,  KeyCode::KeyS)
    );

    let (indices, verts, norms) = mesh!(
        &display, &teapot::INDICES, &teapot::VERTICES, &teapot::NORMALS
    );
    let draw_parameters = DrawParameters {
        backface_culling: draw_parameters::BackfaceCullingMode::CullClockwise,
        ..params::alias_3d()
    };
    let program = Program::from_source(
        &display, shaders::VERTEX,
        "#version 140
        out vec4 colour;
        in vec3 v_normal;
        uniform vec3 light;
        const vec3 albedo = vec3(0.1, 1.0, 0.3);
        void main(){
            float light_level = dot(light, v_normal);
            colour = vec4(albedo * light_level, 1.0);
        }", None,
    ).unwrap();

    let mut pos = vec3(0.0, 0.0, -30.0);
    let mut rot = vec2(0.0, 0.0);
    let mut gravity = 0.0;

    const DELTA: f32 = 0.016;

    thin_engine::run(event_loop, &mut input, |input, target| {
        display.resize(window.inner_size().into());
        let mut frame = display.draw();
        let view = Mat4::view_matrix_3d(frame.get_dimensions(), 1.0, 1024.0, 0.1);

        //handle gravity and jump
        gravity += DELTA * 9.5;
        if input.pressed(Jump) {
            gravity = -10.0;
        }

        //set camera rotation
        rot += input.mouse_move.scale(DELTA * 2.0);
        rot.y = rot.y.clamp(-PI / 2.0, PI / 2.0);
        let rx = Quaternion::from_y_rot(rot.x);
        let ry = Quaternion::from_x_rot(rot.y);
        let rot = rx * ry;

        //move player based on view and gravity
        let x = input.axis(Right, Left);
        let y = input.axis(Forward, Back);
        let move_dir = vec3(x, 0.0, y).normalise();
        pos += move_dir.transform(&Mat3::from_rot(rx)).scale(5.0 * DELTA);
        pos.y = (pos.y - gravity * DELTA).max(0.0);

        if input.pressed(Exit) { target.exit() }

        frame.clear_color_and_depth((0.0, 0.0, 0.0, 1.0), 1.0);
        //draw teapot
        frame.draw(
            (&verts, &norms), &indices,
            &program, &uniform! {
                view: view,
                model: Mat4::from_scale(Vec3::splat(0.1)),
                camera: Mat4::from_inverse_transform(pos, Vec3::ONE, rot),
                light: vec3(1.0, -0.9, -1.0).normalise()
            },
            &draw_parameters,
        ).unwrap();

        frame.finish().unwrap();
        thread::sleep(Duration::from_millis(16));
    }).unwrap();
}
More examples
Hide additional examples
examples/simple-fxaa.rs (line 113)
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fn main() {
    use Action::*;
    let (event_loop, window, display) = thin_engine::set_up().unwrap();
    window.set_title("FXAA Test");
    let _ = window.set_cursor_grab(CursorGrabMode::Locked);
    window.set_cursor_visible(false);

    let mut colour = ResizableTexture2D::default();
    let mut depth = ResizableDepthTexture2D::default();

    let mut input = input_map!(
        (Left,    KeyCode::ArrowLeft,  KeyCode::KeyA),
        (Right,   KeyCode::ArrowRight, KeyCode::KeyD),
        (Forward, KeyCode::ArrowUp,    KeyCode::KeyW),
        (Back,    KeyCode::ArrowDown,  KeyCode::KeyS),
        (FXAA,    KeyCode::KeyF),
        (Jump,    KeyCode::Space)
    );
    let (screen_indices, verts, uvs) = mesh!(
        &display, &screen::INDICES, &screen::VERTICES, &screen::UVS
    );
    let screen_mesh = (&verts, &uvs);
    let (indices, verts, norms) = mesh!(
        &display, &teapot::INDICES, &teapot::VERTICES, &teapot::NORMALS
    );
    let teapot_mesh = (&verts, &norms);
    let draw_parameters = DrawParameters {
        backface_culling: draw_parameters::BackfaceCullingMode::CullClockwise,
        ..params::alias_3d()
    };
    let mut fxaa_on = true;
    let program = Program::from_source(
        &display, shaders::VERTEX,
        "#version 140
        out vec4 colour;
        in vec3 v_normal;
        uniform vec3 light;
        uniform mat4 camera;
        uniform vec3 ambient;
        uniform vec3 albedo;
        uniform float shine;
        void main() {
            vec3 camera_dir = inverse(mat3(camera)) * vec3(0, 0, -1);
            vec3 half_dir = normalize(camera_dir + light);
            float specular = pow(max(dot(half_dir, v_normal), 0.0), shine);
            float light_level = max(dot(light, v_normal), 0.0);
            colour = vec4(albedo * light_level + ambient + vec3(specular), 1.0);
        }", None
    ).unwrap();
    let normal = Program::from_source(
        &display, shaders::SCREEN_VERTEX, 
        "#version 140
        in vec2 uv;
        uniform sampler2D tex;
        out vec4 colour;
        void main() {
            colour = texture(tex, uv);
        }", None
    ).unwrap();
    let fxaa = shaders::fxaa_shader(&display).unwrap();
    
    let mut pos = vec3(0.0, 0.0, -30.0);
    let mut rot = vec2(0.0, 0.0);
    const DELTA: f32 = 0.016;

    thin_engine::run(event_loop, &mut input, |input, _| {
        // using a small resolution to show the effect.
        // `let size = window.inner_size().into();` 
        // can be used instead to set resolution to window size
        let size = (380, 216);
        display.resize(size);
        depth.resize_to_display(&display);
        colour.resize_to_display(&display);

        //press f to toggle FXAA
        if input.pressed(FXAA) { fxaa_on = !fxaa_on }

        let colour = colour.texture.as_ref().unwrap();
        let depth = depth.texture.as_ref().unwrap();
        let mut frame = SimpleFrameBuffer::with_depth_buffer(
            &display, colour, depth
        ).unwrap();

        let view = Mat4::view_matrix_3d(size, 1.0, 1024.0, 0.1);

        //set camera rotation
        rot += input.mouse_move.scale(DELTA * 2.0);
        rot.y = rot.y.clamp(-PI / 2.0, PI / 2.0);
        let rx = Quaternion::from_y_rot(rot.x);
        let ry = Quaternion::from_x_rot(rot.y);
        let rot = rx * ry;

        //move player based on view
        let x = input.axis(Right, Left);
        let y = input.axis(Forward, Back);
        let move_dir = vec3(x, 0.0, y).normalise().scale(5.0*DELTA);
        pos += move_dir.transform(&Mat3::from_rot(rx));

        frame.clear_color_and_depth((0.0, 0.0, 0.0, 1.0), 1.0);
        //draw teapot
        frame.draw(
            teapot_mesh, &indices,
            &program, &uniform! {
                view: view,
                model: Mat4::from_scale(Vec3::splat(0.1)),
                camera: Mat4::from_inverse_transform(pos, Vec3::ONE, rot),
                light: vec3(0.1, 0.25, -1.0).normalise(),
                albedo: vec3(0.5, 0.1, 0.4),
                ambient: vec3(0.0, 0.05, 0.1),
                shine: 50.0f32,
            },
            &draw_parameters,
        ).unwrap();

        let mut frame = display.draw();
        frame.draw(
            screen_mesh, &screen_indices, if fxaa_on { &fxaa } else { &normal },
            &shaders::fxaa_uniforms(colour), &DrawParameters::default()
        ).unwrap();
        frame.finish().unwrap();
        thread::sleep(Duration::from_millis(16));
    }).unwrap();
}

Auto Trait Implementations§

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impl<const BINDS: usize> Freeze for InputMap<BINDS>

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impl<const BINDS: usize> RefUnwindSafe for InputMap<BINDS>

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impl<const BINDS: usize> Send for InputMap<BINDS>

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impl<const BINDS: usize> Sync for InputMap<BINDS>

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impl<const BINDS: usize> Unpin for InputMap<BINDS>

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impl<const BINDS: usize> UnwindSafe for InputMap<BINDS>

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