284 lines
9.2 KiB
Rust
284 lines
9.2 KiB
Rust
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use std::thread;
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use std::sync::mpsc;
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use std::sync::{Arc, RwLock};
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use std::io::Write;
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use byteorder::{WriteBytesExt, NativeEndian};
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use world;
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use render;
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const NUM_WORKERS: usize = 4;
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pub struct ChunkBuilder {
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threads: Vec<(mpsc::Sender<BuildReq>, thread::JoinHandle<()>)>,
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free_builders: Vec<usize>,
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built_recv: mpsc::Receiver<(usize, BuildReply)>,
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}
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impl ChunkBuilder {
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pub fn new(textures: Arc<RwLock<render::TextureManager>>) -> ChunkBuilder {
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let mut threads = vec![];
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let mut free = vec![];
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let (built_send, built_recv) = mpsc::channel();
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for i in 0 .. NUM_WORKERS {
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let built_send = built_send.clone();
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let (work_send, work_recv) = mpsc::channel();
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let textures = textures.clone();
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let id = i;
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threads.push((work_send, thread::spawn(move || build_func(id, textures, work_recv, built_send))));
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free.push(i);
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}
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ChunkBuilder {
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threads: threads,
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free_builders: free,
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built_recv: built_recv,
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}
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}
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pub fn wait_for_builders(&mut self) {
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while self.free_builders.len() != NUM_WORKERS {
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let (id, _) = self.built_recv.recv().unwrap();
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self.free_builders.push(id);
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}
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}
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pub fn tick(&mut self, world: &mut world::World, renderer: &mut render::Renderer) {
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while let Ok((id, val)) = self.built_recv.try_recv() {
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world.reset_building_flag(val.position);
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renderer.update_chunk_solid(val.position, &val.solid_buffer, val.solid_count);
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self.free_builders.push(id);
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}
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if self.free_builders.is_empty() {
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return;
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}
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while let Some((x, y, z)) = world.next_dirty_chunk_section() {
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let t_id = self.free_builders.pop().unwrap();
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let (cx, cy, cz) = (x << 4, y << 4, z << 4);
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let mut snapshot = world.capture_snapshot(cx - 2, cy - 2, cz - 2, 20, 20, 20);
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snapshot.make_relative(-2, -2, -2);
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self.threads[t_id].0.send(BuildReq {
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snapshot: snapshot,
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position: (x, y, z),
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}).unwrap();
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if self.free_builders.is_empty() {
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return;
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}
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}
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}
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}
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struct BuildReq {
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snapshot: world::Snapshot,
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position: (i32, i32, i32),
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}
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struct BuildReply {
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position: (i32, i32, i32),
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solid_buffer: Vec<u8>,
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solid_count: usize,
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}
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fn build_func(id: usize, textures: Arc<RwLock<render::TextureManager>>, work_recv: mpsc::Receiver<BuildReq>, built_send: mpsc::Sender<(usize, BuildReply)>) {
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use rand::{self, Rng};
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loop {
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let BuildReq {
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snapshot,
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position,
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} = match work_recv.recv() {
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Ok(val) => val,
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Err(_) => return,
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};
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let mut solid_buffer = vec![];
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let mut solid_count = 0;
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let mut rng = rand::thread_rng();
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for y in 0 .. 16 {
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for x in 0 .. 16 {
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for z in 0 .. 16 {
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let block = snapshot.get_block(x, y, z);
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if !block.renderable() {
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continue;
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}
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for dir in Direction::all() {
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let offset = dir.get_offset();
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let other = snapshot.get_block(x + offset.0, y + offset.1, z + offset.2);
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if other.renderable() {
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continue;
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}
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let stone = render::Renderer::get_texture(&textures, rng.choose(&[
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"minecraft:blocks/lava_flow",
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"minecraft:blocks/stone",
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"minecraft:blocks/melon_side",
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"minecraft:blocks/sand",
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]).unwrap());
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solid_count += 6;
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for vert in dir.get_verts() {
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let mut vert = vert.clone();
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// TODO
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vert.r = 255;
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vert.g = 255;
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vert.b = 255;
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vert.x += x as f32;
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vert.y += y as f32;
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vert.z += z as f32;
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vert.toffsetx *= stone.get_width() as i16 * 16;
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vert.toffsety *= stone.get_height() as i16 * 16;
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// TODO
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vert.block_light = 15 * 4000;
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vert.sky_light = 15 * 4000;
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// TODO
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vert.tatlas = stone.atlas as i16;
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vert.tx = stone.get_x() as u16;
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vert.ty = stone.get_y() as u16;
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vert.tw = stone.get_width() as u16;
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vert.th = stone.get_height() as u16;
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vert.write(&mut solid_buffer);
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}
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}
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}
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}
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}
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built_send.send((id, BuildReply {
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position: position,
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solid_buffer: solid_buffer,
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solid_count: solid_count,
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})).unwrap();
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}
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}
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#[derive(Debug, Clone, Copy, PartialEq, Eq)]
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pub enum Direction {
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Up,
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Down,
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North,
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South,
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West,
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East,
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}
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impl Direction {
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pub fn all() -> Vec<Direction> {
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vec![
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Direction::Up, Direction::Down,
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Direction::North, Direction::South,
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Direction::West, Direction::East,
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]
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}
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pub fn get_verts(&self) -> &'static [BlockVertex; 4] {
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match *self {
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Direction::Up => PRECOMPUTED_VERTS[0],
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Direction::Down => PRECOMPUTED_VERTS[1],
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Direction::North => PRECOMPUTED_VERTS[2],
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Direction::South => PRECOMPUTED_VERTS[3],
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Direction::West => PRECOMPUTED_VERTS[4],
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Direction::East => PRECOMPUTED_VERTS[5],
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}
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}
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pub fn get_offset(&self) -> (i32, i32, i32) {
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match *self {
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Direction::Up => (0, 1, 0),
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Direction::Down => (0, -1, 0),
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Direction::North => (0, 0, -1),
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Direction::South => (0, 0, 1),
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Direction::West => (-1, 0, 0),
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Direction::East => (1, 0, 0),
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}
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}
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}
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const PRECOMPUTED_VERTS: [&'static [BlockVertex; 4]; 6] = [
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&[ // Up
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BlockVertex::base(0.0, 1.0, 0.0, 0, 0),
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BlockVertex::base(1.0, 1.0, 0.0, 1, 0),
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BlockVertex::base(0.0, 1.0, 1.0, 0, 1),
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BlockVertex::base(1.0, 1.0, 1.0, 1, 1),
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],
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&[ // Down
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BlockVertex::base(0.0, 0.0, 0.0, 0, 1),
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BlockVertex::base(0.0, 0.0, 1.0, 0, 0),
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BlockVertex::base(1.0, 0.0, 0.0, 1, 1),
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BlockVertex::base(1.0, 0.0, 1.0, 1, 0),
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],
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&[ // North
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BlockVertex::base(0.0, 0.0, 0.0, 1, 1),
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BlockVertex::base(1.0, 0.0, 0.0, 0, 1),
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BlockVertex::base(0.0, 1.0, 0.0, 1, 0),
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BlockVertex::base(1.0, 1.0, 0.0, 0, 0),
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],
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&[ // South
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BlockVertex::base(0.0, 0.0, 1.0, 0, 1),
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BlockVertex::base(0.0, 1.0, 1.0, 0, 0),
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BlockVertex::base(1.0, 0.0, 1.0, 1, 1),
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BlockVertex::base(1.0, 1.0, 1.0, 1, 0),
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],
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&[ // West
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BlockVertex::base(0.0, 0.0, 0.0, 0, 1),
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BlockVertex::base(0.0, 1.0, 0.0, 0, 0),
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BlockVertex::base(0.0, 0.0, 1.0, 1, 1),
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BlockVertex::base(0.0, 1.0, 1.0, 1, 0),
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],
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&[ // East
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BlockVertex::base(1.0, 0.0, 0.0, 1, 1),
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BlockVertex::base(1.0, 0.0, 1.0, 0, 1),
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BlockVertex::base(1.0, 1.0, 0.0, 1, 0),
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BlockVertex::base(1.0, 1.0, 1.0, 0, 0),
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],
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];
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#[derive(Clone)]
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pub struct BlockVertex {
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x: f32, y: f32, z: f32,
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tx: u16, ty: u16, tw: u16, th: u16,
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toffsetx: i16, toffsety: i16, tatlas: i16,
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r: u8, g: u8, b: u8,
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block_light: u16, sky_light: u16,
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}
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impl BlockVertex {
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const fn base(x: f32, y: f32, z: f32, tx: i16, ty: i16) -> BlockVertex {
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BlockVertex {
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x: x, y: y, z: z,
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tx: 0, ty: 0, tw: 0, th: 0,
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toffsetx: tx, toffsety: ty, tatlas: 0,
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r: 0, g: 0, b: 0,
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block_light: 0, sky_light: 0,
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}
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}
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fn write<W: Write>(&self, w: &mut W) {
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let _ = w.write_f32::<NativeEndian>(self.x);
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let _ = w.write_f32::<NativeEndian>(self.y);
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let _ = w.write_f32::<NativeEndian>(self.z);
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let _ = w.write_u16::<NativeEndian>(self.tx);
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let _ = w.write_u16::<NativeEndian>(self.ty);
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let _ = w.write_u16::<NativeEndian>(self.tw);
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let _ = w.write_u16::<NativeEndian>(self.th);
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let _ = w.write_i16::<NativeEndian>(self.toffsetx);
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let _ = w.write_i16::<NativeEndian>(self.toffsety);
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let _ = w.write_i16::<NativeEndian>(self.tatlas);
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let _ = w.write_i16::<NativeEndian>(0);
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let _ = w.write_u8(self.r);
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let _ = w.write_u8(self.g);
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let _ = w.write_u8(self.b);
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let _ = w.write_u8(255);
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let _ = w.write_u16::<NativeEndian>(self.block_light);
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let _ = w.write_u16::<NativeEndian>(self.sky_light);
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let _ = w.write_u16::<NativeEndian>(0);
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let _ = w.write_u16::<NativeEndian>(0);
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}
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}
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