From 64475022e38817e024e537fc2252a0f41053480e Mon Sep 17 00:00:00 2001 From: griffi-gh Date: Thu, 2 May 2024 12:42:14 +0200 Subject: [PATCH] rewrite worldgen --- kubi-shared/src/worldgen.rs | 378 ++++-------------------- kubi-shared/src/worldgen/_01_terrain.rs | 28 ++ 2 files changed, 86 insertions(+), 320 deletions(-) create mode 100644 kubi-shared/src/worldgen/_01_terrain.rs diff --git a/kubi-shared/src/worldgen.rs b/kubi-shared/src/worldgen.rs index 7ddb678..958ffb1 100644 --- a/kubi-shared/src/worldgen.rs +++ b/kubi-shared/src/worldgen.rs @@ -1,342 +1,80 @@ -use bracket_noise::prelude::*; -use rand::prelude::*; -use glam::{IVec3, ivec3, Vec3Swizzles, IVec2}; -use rand_xoshiro::Xoshiro256StarStar; +use std::sync::atomic::AtomicBool; + +use glam::{ivec3, IVec3}; use crate::{ - chunk::{BlockData, CHUNK_SIZE}, block::Block, + chunk::{BlockData, CHUNK_SIZE}, queue::QueuedBlock, }; -fn mountain_ramp(mut x: f32) -> f32 { - x *= 2.0; - if x < 0.4 { - 0.5 * x - } else if x < 0.55 { - 4. * (x - 0.4) + 0.2 - } else { - 0.4444 * (x - 0.55) + 0.8 +mod _01_terrain; + +trait WorldGenStep { + fn initialize(generator: &WorldGenerator) -> Self; + fn generate(&mut self, generator: &mut WorldGenerator); +} + +macro_rules! run_steps { + ($gen: expr, $abort: expr, [$($step:ty),* $(,)?]) => { + { + let _abort: AtomicBool = $abort.unwrap_or(AtomicBool::new(false)); + $({ + let _ensure_ref: &mut WorldGenerator = $gen; + struct _Ensure0(T); + type _Ensure1 = _Ensure0<$step>; + let mut step: _Ensure1 = _Ensure0(<$step>::initialize(&*_ensure_ref)); + step.0.generate(_ensure_ref); + })* + } + }; +} + +pub struct WorldGenerator { + seed: u64, + chunk_position: IVec3, + blocks: BlockData, + queue: Vec, +} + +impl WorldGenerator { + fn offset(&self) -> IVec3 { + self.chunk_position * CHUNK_SIZE as i32 } -} -fn local_height(height: i32, chunk_position: IVec3) -> usize { - let offset = chunk_position * CHUNK_SIZE as i32; - (height - offset.y).clamp(0, CHUNK_SIZE as i32) as usize -} - -fn local_y_position(height: i32, chunk_position: IVec3) -> Option { - let offset = chunk_position * CHUNK_SIZE as i32; - let position = height - offset.y; - (0..CHUNK_SIZE as i32).contains(&position).then_some(position as usize) -} - - -pub fn generate_world(chunk_position: IVec3, seed: u64) -> (BlockData, Vec) { - let offset = chunk_position * CHUNK_SIZE as i32; - let mut blocks = Box::new([[[Block::Air; CHUNK_SIZE]; CHUNK_SIZE]; CHUNK_SIZE]); - let mut queue = Vec::with_capacity(0); - - let mut smart_place = |blocks: &mut BlockData, position: IVec3, block: Block| { + fn place_or_queue(&mut self, position: IVec3, block: Block) { + let offset = self.offset(); if position.to_array().iter().any(|&x| !(0..CHUNK_SIZE).contains(&(x as usize))) { let event_pos = offset + position; - queue.retain(|block: &QueuedBlock| { + self.queue.retain(|block: &QueuedBlock| { block.position != event_pos }); - queue.push(QueuedBlock { - position: event_pos, + self.queue.push(QueuedBlock { + position: event_pos, block_type: block, soft: true }); } else { - blocks[position.x as usize][position.y as usize][position.z as usize] = block; - } - }; - - //STICK - if chunk_position.x == 0 && chunk_position.y == 5 { - for z in 0..CHUNK_SIZE { - blocks[0][0][z] = Block::Stone; - } - } - // - - let mut height_noise = FastNoise::seeded(seed); - height_noise.set_fractal_type(FractalType::FBM); - height_noise.set_fractal_octaves(4); - height_noise.set_frequency(0.003); - - let mut elevation_noise = FastNoise::seeded(seed.rotate_left(1)); - elevation_noise.set_fractal_type(FractalType::FBM); - elevation_noise.set_fractal_octaves(1); - elevation_noise.set_frequency(0.001); - - let mut cave_noise_a = FastNoise::seeded(seed.rotate_left(2)); - cave_noise_a.set_fractal_type(FractalType::FBM); - cave_noise_a.set_fractal_octaves(2); - cave_noise_a.set_frequency(0.01); - - let mut cave_noise_b = FastNoise::seeded(seed.rotate_left(3)); - cave_noise_b.set_fractal_type(FractalType::FBM); - cave_noise_b.set_fractal_octaves(3); - cave_noise_b.set_frequency(0.015); - - let mut cave_noise_holes = FastNoise::seeded(seed.rotate_left(4)); - cave_noise_holes.set_fractal_type(FractalType::FBM); - cave_noise_holes.set_fractal_octaves(2); - cave_noise_holes.set_frequency(0.005); - - let mut ravine_nose_line = FastNoise::seeded(seed.rotate_left(5)); - ravine_nose_line.set_fractal_type(FractalType::Billow); - ravine_nose_line.set_fractal_octaves(2); - ravine_nose_line.set_frequency(0.005); - - let mut ravine_noise_location = FastNoise::seeded(seed.rotate_left(6)); - ravine_noise_location.set_fractal_type(FractalType::FBM); - ravine_noise_location.set_fractal_octaves(1); - ravine_noise_location.set_frequency(0.005); - - let mut river_noise = FastNoise::seeded(seed.rotate_left(7)); - river_noise.set_fractal_type(FractalType::Billow); - river_noise.set_fractal_octaves(2); - river_noise.set_frequency(0.5 * 0.005); - - let mut rng = Xoshiro256StarStar::seed_from_u64( - seed - ^ (chunk_position.x as u32 as u64) - ^ ((chunk_position.z as u32 as u64) << 32) - ); - let rng_map_a: [[f32; CHUNK_SIZE]; CHUNK_SIZE] = rng.gen(); - let rng_map_b: [[f32; CHUNK_SIZE]; CHUNK_SIZE] = rng.gen(); - - //Generate height map - let mut within_heightmap = false; - let mut deco_heightmap = [[None; CHUNK_SIZE]; CHUNK_SIZE]; - - for x in 0..CHUNK_SIZE { - for z in 0..CHUNK_SIZE { - let (noise_x, noise_y) = ((offset.x + x as i32) as f32, (offset.z + z as i32) as f32); - //sample noises (that are needed right now) - let raw_heightmap_value = height_noise.get_noise(noise_x, noise_y); - let raw_elevation_value = elevation_noise.get_noise(noise_x, noise_y); - let raw_ravine_location_value = ravine_noise_location.get_noise(noise_x, noise_y); - //compute height - let mut is_surface = true; - let mut river_fill_height = None; - let height = { - let local_elevation = raw_elevation_value.powi(4).sqrt(); - let mut height = (mountain_ramp(raw_heightmap_value) * local_elevation * 100.) as i32; - //Flatten valleys - if height < 0 { - height /= 2; - } - //Generate rivers - { - let river_width = (height as f32 / -5.).clamp(0.5, 1.); - let river_value = river_noise.get_noise(noise_x, noise_y); - if ((-0.00625 * river_width)..(0.00625 * river_width)).contains(&(river_value.powi(2))) { - is_surface = false; - river_fill_height = Some(height - 1); - //river_fill_height = Some(-3); - height -= (river_width * 15. * ((0.00625 * river_width) - river_value.powi(2)) * (1. / (0.00625 * river_width))).round() as i32; - } - } - //Generate ravines - if height < 0 && raw_ravine_location_value > 0.4 { - let raw_ravine_value = ravine_nose_line.get_noise(noise_x, noise_y); - if (-0.0125..0.0125).contains(&(raw_ravine_value.powi(2))) { - is_surface = false; - height -= (100. * (0.0125 - raw_ravine_value.powi(2)) * (1. / 0.0125)).round() as i32; - } - } - height - }; - //add to heightmap - if is_surface { - deco_heightmap[x][z] = Some(height); - //place dirt - for y in 0..local_height(height, chunk_position) { - blocks[x][y][z] = Block::Dirt; - within_heightmap = true; - } - //place stone - for y in 0..local_height(height - 5 - (raw_heightmap_value * 5.) as i32, chunk_position) { - blocks[x][y][z] = Block::Stone; - within_heightmap = true; - } - //place grass - if let Some(y) = local_y_position(height, chunk_position) { - blocks[x][y][z] = Block::Grass; - within_heightmap = true; - } - } else if let Some(river_fill_height) = river_fill_height { - //Place water - for y in 0..local_height(river_fill_height, chunk_position) { - blocks[x][y][z] = Block::Water; - within_heightmap = true; - } - //Place stone - for y in 0..local_height(height, chunk_position) { - blocks[x][y][z] = Block::Stone; - within_heightmap = true; - } - //Place dirt - if let Some(y) = local_y_position(height, chunk_position) { - blocks[x][y][z] = Block::Dirt; - within_heightmap = true; - } - } else { - //Place stone - for y in 0..local_height(height, chunk_position) { - blocks[x][y][z] = Block::Stone; - within_heightmap = true; - } - } - } - } - - //Carve out caves - if within_heightmap { - for z in 0..CHUNK_SIZE { - for y in 0..CHUNK_SIZE { - for x in 0..CHUNK_SIZE { - if blocks[x][y][z] != Block::Stone { continue } - - let cave_size = ((offset.y + y as i32) as f32 / -100.).clamp(0., 1.); - let inv_cave_size = 1. - cave_size; - if cave_size < 0.1 { continue } - - let position = ivec3(x as i32, y as i32, z as i32) + offset; - - let is_cave = || { - let raw_cavemap_value_a = cave_noise_a.get_noise3d(position.x as f32, position.y as f32, position.z as f32); - let raw_cavemap_value_b = cave_noise_b.get_noise3d(position.x as f32, position.y as f32, position.z as f32); - ((cave_size * -0.15)..=(cave_size * 0.15)).contains(&raw_cavemap_value_a) && - ((cave_size * -0.15)..=(cave_size * 0.15)).contains(&raw_cavemap_value_b) - }; - let is_hole_cave = || { - let raw_cavemap_value_holes = cave_noise_holes.get_noise3d(position.x as f32, position.y as f32, position.z as f32); - ((0.9 + (0.1 * inv_cave_size))..=1.0).contains(&raw_cavemap_value_holes.abs()) - }; - - if is_cave() || is_hole_cave() { - blocks[x][y][z] = Block::Air; - if deco_heightmap[x][z] == Some(y as i32 + offset.y) { - deco_heightmap[x][z] = None - } - } - } - } + self.blocks[position.x as usize][position.y as usize][position.z as usize] = block; } } - //Add decorations - for x in 0..CHUNK_SIZE { - for z in 0..CHUNK_SIZE { - //get height - let Some(height) = deco_heightmap[x][z] else { continue }; - //check for air - // if blocks[x][local_y][z] == Block::Air { - // continue - // } - //place tall grass - if rng_map_a[x][z] < 0.03 { - if let Some(y) = local_y_position(height + 1, chunk_position) { - blocks[x][y][z] = Block::TallGrass; - } - } - //place trees! - if rng_map_a[x][z] < 0.001 { - //Replace grass with dirt under the tree - if let Some(y) = local_y_position(height, chunk_position) { - blocks[x][y][z] = Block::Dirt; - } - - //Place wood (no smart_place needed here!) - let tree_height = 4 + (rng_map_b[x][z] * 3.).round() as i32; - for tree_y in 0..tree_height { - if let Some(y) = local_y_position(height + 1 + tree_y, chunk_position) { - blocks[x][y][z] = Block::Wood; - } - } - - let tree_height = 4 + (rng_map_b[x][z] * 3.).round() as i32; - - //Place leaf blocks - if let Some(y) = local_y_position(height + 1, chunk_position) { - let tree_pos = ivec3(x as i32, y as i32, z as i32); - // Place wood (smart_place) - // for tree_y in 0..tree_height { - // smart_place(&mut blocks, tree_pos + tree_y * IVec3::Y, Block::Wood); - // } - // Part that wraps around the tree - { - let tree_leaf_height = tree_height - 3; - let leaf_width = 2; - for tree_y in tree_leaf_height..tree_height { - for tree_x in (-leaf_width)..=leaf_width { - for tree_z in (-leaf_width)..=leaf_width { - let tree_offset = ivec3(tree_x, tree_y, tree_z); - if tree_offset.xz() == IVec2::ZERO { continue } - smart_place(&mut blocks, tree_pos + tree_offset, Block::Leaf); - } - } - } - } - //part above the tree - { - let leaf_above_height = 2; - let leaf_width = 1; - for tree_y in tree_height..(tree_height + leaf_above_height) { - for tree_x in (-leaf_width)..=leaf_width { - for tree_z in (-leaf_width)..=leaf_width { - let tree_offset = ivec3(tree_x, tree_y, tree_z); - smart_place(&mut blocks, tree_pos + tree_offset, Block::Leaf); - } - } - } - } - } - } + pub fn new(chunk_position: IVec3, seed: u64) -> Self { + Self { + seed, + chunk_position, + blocks: Box::new([[[Block::Air; CHUNK_SIZE]; CHUNK_SIZE]; CHUNK_SIZE]), + queue: Vec::with_capacity(0), } } - (blocks, queue) - - // let mut cave_noise = FastNoise::seeded(seed); - // cave_noise.set_fractal_type(FractalType::FBM); - // cave_noise.set_frequency(0.1); - - // let mut dirt_noise = FastNoise::seeded(seed.rotate_left(1)); - // dirt_noise.set_fractal_type(FractalType::FBM); - // dirt_noise.set_frequency(0.1); - - // - - // if chunk_position.y >= 0 { - // if chunk_position.y == 0 { - // for x in 0..CHUNK_SIZE { - // for z in 0..CHUNK_SIZE { - // blocks[x][0][z] = Block::Dirt; - // blocks[x][1][z] = Block::Grass; - // } - // } - // } - // } else { - // for x in 0..CHUNK_SIZE { - // for y in 0..CHUNK_SIZE { - // for z in 0..CHUNK_SIZE { - // let position = ivec3(x as i32, y as i32, z as i32) + offset; - // let v_cave_noise = cave_noise.get_noise3d(position.x as f32, position.y as f32, position.z as f32) * (-position.y as f32 - 10.0).clamp(0., 1.); - // let v_dirt_noise = dirt_noise.get_noise3d(position.x as f32, position.y as f32, position.z as f32) * (-position.y as f32).clamp(0., 1.); - // if v_cave_noise > 0.5 { - // blocks[x][y][z] = Block::Stone; - // } else if v_dirt_noise > 0.5 { - // blocks[x][y][z] = Block::Dirt; - // } - // } - // } - // } - // } - // blocks - + pub fn generate(mut self, abort: Option) -> (BlockData, Vec) { + run_steps!(&mut self, abort, [ + _01_terrain::TerrainStep + ]); + (self.blocks, self.queue) + } +} + +pub fn generate_world(chunk_position: IVec3, seed: u64) -> (BlockData, Vec) { + WorldGenerator::new(chunk_position, seed).generate(None) } diff --git a/kubi-shared/src/worldgen/_01_terrain.rs b/kubi-shared/src/worldgen/_01_terrain.rs new file mode 100644 index 0000000..98a07b3 --- /dev/null +++ b/kubi-shared/src/worldgen/_01_terrain.rs @@ -0,0 +1,28 @@ +use bracket_noise::prelude::{FastNoise, FractalType}; +use glam::ivec3; +use crate::{block::Block, chunk::CHUNK_SIZE}; +use super::{WorldGenerator, WorldGenStep}; + +pub struct TerrainStep { + noise: FastNoise, +} +impl WorldGenStep for TerrainStep { + fn initialize(generator: &WorldGenerator) -> Self { + let mut noise = FastNoise::seeded(generator.seed); + noise.set_fractal_type(FractalType::FBM); + noise.set_fractal_octaves(4); + noise.set_frequency(0.003); + Self { noise } + } + + fn generate(&mut self, generator: &mut WorldGenerator) { + for x in 0..CHUNK_SIZE as i32 { + for z in 0..CHUNK_SIZE as i32 { + let height = (self.noise.get_noise(x as f32, z as f32) * 8.0) as i32; + for y in 0..height { + generator.place_or_queue(ivec3(x, y, z), Block::Stone); + } + } + } + } +}