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|
use std::collections::HashMap;
use crate::{context, framebuffer, shader, audio};
const DELTA_TIME: f64 = 1.0 / 60.0;
pub trait Game {
fn initialize_audio(&self, ctx: &context::Context, st: &State, actx: &audio::Context) ->
HashMap<String, audio::Audio>;
fn finish_title(&mut self);
fn update(&mut self, ctx: &context::Context, st: &mut State) -> Option<()>;
fn render(&mut self, ctx: &context::Context, st: &mut State) -> Option<()>;
}
pub struct Keys {
pub up: bool,
pub down: bool,
pub left: bool,
pub right: bool,
pub a: bool,
pub b: bool,
pub l: bool,
pub r: bool,
pub start: bool,
pub select: bool,
}
impl Keys {
pub fn new() -> Self {
Self {
up: false,
down: false,
left: false,
right: false,
a: false,
b: false,
l: false,
r: false,
start: false,
select: false,
}
}
}
pub struct State {
pub acc: f64,
pub last: f64,
pub tick: u64,
pub keys: Keys,
pub screen: framebuffer::Framebuffer,
pub render_framebuffer: framebuffer::Framebuffer,
pub shader_upscale: shader::Shader,
pub audio: Option<audio::Assets>,
pub projection: glam::Mat4,
pub camera: glam::Mat4,
pub lighting: (glam::Vec3, glam::Vec3),
pub log: Vec<(u64, String)>,
}
pub fn now(ctx: &context::Context) -> f64 {
ctx.performance.now() / 1000.0
}
impl State {
pub fn new(ctx: &context::Context) -> Self {
let screen = framebuffer::Framebuffer::screen(ctx);
let render_framebuffer = framebuffer::Framebuffer::new(
ctx,
&glam::Vec2::new(context::RENDER_WIDTH, context::RENDER_HEIGHT),
&glam::Vec2::new(0.0, 0.0),
);
let shader_upscale = shader::Shader::new_nolib(
ctx,
include_str!("assets/shaders/scale/vert.glsl"),
include_str!("assets/shaders/scale/frag.glsl"),
);
Self {
acc: 0.0,
last: now(ctx),
tick: 0,
keys: Keys::new(),
screen,
render_framebuffer,
shader_upscale,
audio: None,
projection: glam::Mat4::perspective_lh(
std::f32::consts::PI / 4.0,
context::RENDER_WIDTH / context::RENDER_HEIGHT,
0.1,
400.0,
),
camera: glam::Mat4::IDENTITY,
lighting: (
glam::Vec3::new(1.0, 0.0, 0.0),
glam::Vec3::new(1.0, -1.0, 1.0),
),
log: Vec::new(),
}
}
pub fn write_log(&mut self, e: &str) {
self.log.push((self.tick, e.to_owned()));
}
pub fn handle_resize(&mut self, ctx: &context::Context) {
self.screen = framebuffer::Framebuffer::screen(ctx);
}
pub fn move_camera(
&mut self,
_ctx: &context::Context,
camera: &glam::Mat4,
) {
self.camera = camera.clone();
}
pub fn set_lighting(
&mut self,
_ctx: &context::Context,
color: &glam::Vec3,
dir: &glam::Vec3,
) {
self.lighting = (color.clone(), dir.clone());
}
pub fn view(&self) -> glam::Mat4 {
self.camera.clone()
}
pub fn bind_3d(&mut self, ctx: &context::Context, shader: &shader::Shader) {
shader.bind(ctx);
shader.set_mat4(&ctx, "projection", &self.projection);
shader.set_mat4(ctx, "view", &self.view());
shader.set_vec3(
ctx, "light_ambient_color",
&glam::Vec3::new(1.0, 1.0, 1.0));
shader.set_vec3(
ctx, "light_dir_color",
&self.lighting.0,
);
shader.set_vec3(
ctx, "light_dir",
&self.lighting.1,
);
}
pub fn bind_2d(&mut self, ctx: &context::Context, shader: &shader::Shader) {
shader.bind(ctx);
shader.set_mat4(&ctx, "projection", &glam::Mat4::IDENTITY);
shader.set_mat4(
ctx, "view",
&glam::Mat4::from_scale(
glam::Vec3::new(
2.0 / context::RENDER_WIDTH,
2.0 / context::RENDER_HEIGHT,
1.0,
),
),
);
}
pub fn mouse_pressed<G>(
&mut self,
ctx: &context::Context,
_button: winit::event::MouseButton,
game: &mut G
) where G: Game {
log::info!("click");
if self.audio.is_none() {
self.audio = Some(audio::Assets::new(|actx| {
game.initialize_audio(ctx, &self, actx)
}));
game.finish_title();
}
}
pub fn mouse_released(
&mut self,
_ctx: &context::Context,
_button: winit::event::MouseButton,
) {
}
pub fn key_pressed(
&mut self,
_ctx: &context::Context,
key: winit::keyboard::KeyCode,
) {
match key {
winit::keyboard::KeyCode::KeyW => self.keys.up = true,
winit::keyboard::KeyCode::KeyS => self.keys.down = true,
winit::keyboard::KeyCode::KeyA => self.keys.left = true,
winit::keyboard::KeyCode::KeyD => self.keys.right = true,
winit::keyboard::KeyCode::Digit1 => self.keys.a = true,
winit::keyboard::KeyCode::Digit2 => self.keys.b = true,
winit::keyboard::KeyCode::KeyQ => self.keys.l = true,
winit::keyboard::KeyCode::KeyE => self.keys.r = true,
winit::keyboard::KeyCode::Tab => self.keys.start = true,
winit::keyboard::KeyCode::Space => self.keys.select = true,
_ => {},
}
}
pub fn key_released(
&mut self,
_ctx: &context::Context,
key: winit::keyboard::KeyCode,
) {
match key {
winit::keyboard::KeyCode::KeyW => self.keys.up = false,
winit::keyboard::KeyCode::KeyS => self.keys.down = false,
winit::keyboard::KeyCode::KeyA => self.keys.left = false,
winit::keyboard::KeyCode::KeyD => self.keys.right = false,
winit::keyboard::KeyCode::Digit1 => self.keys.a = false,
winit::keyboard::KeyCode::Digit2 => self.keys.b = false,
winit::keyboard::KeyCode::KeyQ => self.keys.l = false,
winit::keyboard::KeyCode::KeyE => self.keys.r = false,
winit::keyboard::KeyCode::Tab => self.keys.start = false,
winit::keyboard::KeyCode::Space => self.keys.select = false,
_ => {},
}
}
pub fn run_update<G>(&mut self, ctx: &context::Context, game: &mut G) where G: Game {
let now = now(ctx);
self.acc += now - self.last;
self.last = now;
// update, if enough time has accumulated since last update
if self.acc >= DELTA_TIME {
self.acc -= DELTA_TIME;
self.tick += 1;
game.update(ctx, self);
// if a lot of time has elapsed (e.g. if window is unfocused and not
// running update loop), prevent "death spiral"
if self.acc >= DELTA_TIME { self.acc = 0.0 }
}
}
pub fn run_render<G>(&mut self, ctx: &context::Context, game: &mut G) where G: Game {
self.render_framebuffer.bind(&ctx);
ctx.clear_color(glam::Vec4::new(0.1, 0.1, 0.1, 1.0));
ctx.clear();
game.render(ctx, self);
self.screen.bind(&ctx);
ctx.clear_color(glam::Vec4::new(0.0, 0.0, 0.0, 1.0));
ctx.clear();
self.shader_upscale.bind(&ctx);
self.render_framebuffer.bind_texture(&ctx);
ctx.render_no_geometry();
}
}
|
