use common::{ generation::{ChunkSupplement, EntityInfo}, terrain::{Block, BlockKind, MapSizeLg, TerrainChunk, TerrainChunkMeta, TerrainChunkSize}, vol::{ReadVol, RectVolSize, Vox, WriteVol}, }; use rand::{prelude::*, rngs::SmallRng}; use std::time::Duration; use vek::*; const DEFAULT_WORLD_CHUNKS_LG: MapSizeLg = if let Ok(map_size_lg) = MapSizeLg::new(Vec2 { x: 1, y: 1 }) { map_size_lg } else { panic!("Default world chunk size does not satisfy required invariants."); }; pub struct World; #[derive(Clone)] pub struct IndexOwned; #[derive(Clone, Copy)] pub struct IndexRef<'a>(&'a IndexOwned); impl IndexOwned { pub fn reload_colors_if_changed( &mut self, _reload: impl FnOnce(&mut Self) -> R, ) -> Option { None } pub fn as_index_ref(&self) -> IndexRef { IndexRef(self) } } impl World { pub fn generate(_seed: u32) -> (Self, IndexOwned) { (Self, IndexOwned) } pub fn tick(&self, dt: Duration) {} #[inline(always)] pub const fn map_size_lg(&self) -> MapSizeLg { DEFAULT_WORLD_CHUNKS_LG } pub fn generate_chunk( &self, _index: IndexRef, chunk_pos: Vec2, _should_continue: impl FnMut() -> bool, ) -> Result<(TerrainChunk, ChunkSupplement), ()> { let (x, y) = chunk_pos.map(|e| e.to_le_bytes()).into_tuple(); let mut rng = SmallRng::from_seed([ x[0], x[1], x[2], x[3], y[0], y[1], y[2], y[3], x[0], x[1], x[2], x[3], y[0], y[1], y[2], y[3], ]); let height = rng.gen::() % 8; let mut supplement = ChunkSupplement::default(); Ok(( TerrainChunk::new( 256 + if rng.gen::() < 64 { height } else { 0 }, Block::new(BlockKind::Grass, Rgb::new(11, 102, 35)), Block::empty(), TerrainChunkMeta::void(), ), supplement, )) } }