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path: root/client/src/state.rs
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use crate::{camera::Camera, download::Downloader, network::Network, renderer::Renderer};
use anyhow::{Context, Result};
use glam::{Vec2, Vec3};
use log::{info, warn};
use std::{net::TcpStream, time::Instant};
use weareshared::{store::ResourceStore, tree::SceneTree};
use winit::window::Window;

pub struct State<'a> {
    pub network: Network,
    pub downloader: Downloader,
    pub renderer: Renderer<'a>,
    pub tree: SceneTree,
    pub camera: Camera,
    pub delta: DeltaState,
}

pub struct DeltaState {
    time: Instant,
    pub move_dir: Vec3,
    pub mouse_acc: Vec2,
}

impl<'a> State<'a> {
    pub fn new(conn: TcpStream, window: &'a Window) -> Result<State<'a>> {
        info!("new state");
        Ok(Self {
            camera: Camera::new(),
            network: Network::new(conn),
            tree: SceneTree::default(),
            renderer: Renderer::new(window)?,
            downloader: Downloader::new(ResourceStore::new_memory()),
            delta: DeltaState {
                time: Instant::now(),
                move_dir: Vec3::ZERO,
                mouse_acc: Vec2::ZERO,
            },
        })
    }
    pub fn draw(&mut self) {
        if let Err(e) = self.renderer.draw(&self.tree, &self.camera) {
            warn!("draw failed: {e:?}");
        }
    }
    pub fn resize(&mut self, width: u32, height: u32) {
        self.renderer.resize(width, height);
    }
    pub fn update(&mut self) -> Result<()> {
        let now = Instant::now();
        let dt = (now - self.delta.time).as_secs_f32();
        self.delta.time = now;

        self.camera
            .update(self.delta.move_dir, self.delta.mouse_acc, dt);
        self.delta.mouse_acc = Vec2::ZERO;

        for p in self.network.packet_recv.try_iter() {
            self.downloader.packet(&p)?;
            self.tree.packet(&p);
        }
        self.downloader
            .update(&mut self.network)
            .context("downloader state")?;
        self.renderer
            .scene_prepare
            .update(&mut self.downloader)
            .context("scene preparation")?;

        Ok(())
    }
}