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rewrite worldgen
This commit is contained in:
parent
6ee3130f8a
commit
7d5b706d0d
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@ -1,342 +1,80 @@
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use bracket_noise::prelude::*;
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use rand::prelude::*;
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use glam::{IVec3, ivec3, Vec3Swizzles, IVec2};
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use rand_xoshiro::Xoshiro256StarStar;
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use std::sync::atomic::AtomicBool;
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use glam::{ivec3, IVec3};
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use crate::{
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chunk::{BlockData, CHUNK_SIZE},
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block::Block,
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chunk::{BlockData, CHUNK_SIZE},
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queue::QueuedBlock,
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};
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fn mountain_ramp(mut x: f32) -> f32 {
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x *= 2.0;
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if x < 0.4 {
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0.5 * x
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} else if x < 0.55 {
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4. * (x - 0.4) + 0.2
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} else {
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0.4444 * (x - 0.55) + 0.8
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mod _01_terrain;
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trait WorldGenStep {
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fn initialize(generator: &WorldGenerator) -> Self;
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fn generate(&mut self, generator: &mut WorldGenerator);
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}
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macro_rules! run_steps {
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($gen: expr, $abort: expr, [$($step:ty),* $(,)?]) => {
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{
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let _abort: AtomicBool = $abort.unwrap_or(AtomicBool::new(false));
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$({
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let _ensure_ref: &mut WorldGenerator = $gen;
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struct _Ensure0<T: WorldGenStep>(T);
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type _Ensure1 = _Ensure0<$step>;
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let mut step: _Ensure1 = _Ensure0(<$step>::initialize(&*_ensure_ref));
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step.0.generate(_ensure_ref);
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})*
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}
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};
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}
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pub struct WorldGenerator {
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seed: u64,
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chunk_position: IVec3,
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blocks: BlockData,
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queue: Vec<QueuedBlock>,
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}
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impl WorldGenerator {
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fn offset(&self) -> IVec3 {
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self.chunk_position * CHUNK_SIZE as i32
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}
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}
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fn local_height(height: i32, chunk_position: IVec3) -> usize {
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let offset = chunk_position * CHUNK_SIZE as i32;
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(height - offset.y).clamp(0, CHUNK_SIZE as i32) as usize
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}
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fn local_y_position(height: i32, chunk_position: IVec3) -> Option<usize> {
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let offset = chunk_position * CHUNK_SIZE as i32;
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let position = height - offset.y;
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(0..CHUNK_SIZE as i32).contains(&position).then_some(position as usize)
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}
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pub fn generate_world(chunk_position: IVec3, seed: u64) -> (BlockData, Vec<QueuedBlock>) {
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let offset = chunk_position * CHUNK_SIZE as i32;
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let mut blocks = Box::new([[[Block::Air; CHUNK_SIZE]; CHUNK_SIZE]; CHUNK_SIZE]);
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let mut queue = Vec::with_capacity(0);
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let mut smart_place = |blocks: &mut BlockData, position: IVec3, block: Block| {
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fn place_or_queue(&mut self, position: IVec3, block: Block) {
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let offset = self.offset();
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if position.to_array().iter().any(|&x| !(0..CHUNK_SIZE).contains(&(x as usize))) {
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let event_pos = offset + position;
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queue.retain(|block: &QueuedBlock| {
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self.queue.retain(|block: &QueuedBlock| {
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block.position != event_pos
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});
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queue.push(QueuedBlock {
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position: event_pos,
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self.queue.push(QueuedBlock {
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position: event_pos,
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block_type: block,
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soft: true
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});
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} else {
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blocks[position.x as usize][position.y as usize][position.z as usize] = block;
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}
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};
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//STICK
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if chunk_position.x == 0 && chunk_position.y == 5 {
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for z in 0..CHUNK_SIZE {
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blocks[0][0][z] = Block::Stone;
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}
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}
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//
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let mut height_noise = FastNoise::seeded(seed);
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height_noise.set_fractal_type(FractalType::FBM);
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height_noise.set_fractal_octaves(4);
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height_noise.set_frequency(0.003);
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let mut elevation_noise = FastNoise::seeded(seed.rotate_left(1));
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elevation_noise.set_fractal_type(FractalType::FBM);
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elevation_noise.set_fractal_octaves(1);
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elevation_noise.set_frequency(0.001);
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let mut cave_noise_a = FastNoise::seeded(seed.rotate_left(2));
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cave_noise_a.set_fractal_type(FractalType::FBM);
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cave_noise_a.set_fractal_octaves(2);
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cave_noise_a.set_frequency(0.01);
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let mut cave_noise_b = FastNoise::seeded(seed.rotate_left(3));
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cave_noise_b.set_fractal_type(FractalType::FBM);
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cave_noise_b.set_fractal_octaves(3);
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cave_noise_b.set_frequency(0.015);
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let mut cave_noise_holes = FastNoise::seeded(seed.rotate_left(4));
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cave_noise_holes.set_fractal_type(FractalType::FBM);
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cave_noise_holes.set_fractal_octaves(2);
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cave_noise_holes.set_frequency(0.005);
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let mut ravine_nose_line = FastNoise::seeded(seed.rotate_left(5));
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ravine_nose_line.set_fractal_type(FractalType::Billow);
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ravine_nose_line.set_fractal_octaves(2);
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ravine_nose_line.set_frequency(0.005);
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let mut ravine_noise_location = FastNoise::seeded(seed.rotate_left(6));
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ravine_noise_location.set_fractal_type(FractalType::FBM);
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ravine_noise_location.set_fractal_octaves(1);
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ravine_noise_location.set_frequency(0.005);
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let mut river_noise = FastNoise::seeded(seed.rotate_left(7));
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river_noise.set_fractal_type(FractalType::Billow);
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river_noise.set_fractal_octaves(2);
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river_noise.set_frequency(0.5 * 0.005);
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let mut rng = Xoshiro256StarStar::seed_from_u64(
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seed
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^ (chunk_position.x as u32 as u64)
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^ ((chunk_position.z as u32 as u64) << 32)
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);
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let rng_map_a: [[f32; CHUNK_SIZE]; CHUNK_SIZE] = rng.gen();
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let rng_map_b: [[f32; CHUNK_SIZE]; CHUNK_SIZE] = rng.gen();
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//Generate height map
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let mut within_heightmap = false;
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let mut deco_heightmap = [[None; CHUNK_SIZE]; CHUNK_SIZE];
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for x in 0..CHUNK_SIZE {
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for z in 0..CHUNK_SIZE {
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let (noise_x, noise_y) = ((offset.x + x as i32) as f32, (offset.z + z as i32) as f32);
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//sample noises (that are needed right now)
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let raw_heightmap_value = height_noise.get_noise(noise_x, noise_y);
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let raw_elevation_value = elevation_noise.get_noise(noise_x, noise_y);
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let raw_ravine_location_value = ravine_noise_location.get_noise(noise_x, noise_y);
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//compute height
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let mut is_surface = true;
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let mut river_fill_height = None;
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let height = {
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let local_elevation = raw_elevation_value.powi(4).sqrt();
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let mut height = (mountain_ramp(raw_heightmap_value) * local_elevation * 100.) as i32;
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//Flatten valleys
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if height < 0 {
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height /= 2;
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}
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//Generate rivers
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{
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let river_width = (height as f32 / -5.).clamp(0.5, 1.);
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let river_value = river_noise.get_noise(noise_x, noise_y);
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if ((-0.00625 * river_width)..(0.00625 * river_width)).contains(&(river_value.powi(2))) {
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is_surface = false;
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river_fill_height = Some(height - 1);
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//river_fill_height = Some(-3);
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height -= (river_width * 15. * ((0.00625 * river_width) - river_value.powi(2)) * (1. / (0.00625 * river_width))).round() as i32;
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}
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}
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//Generate ravines
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if height < 0 && raw_ravine_location_value > 0.4 {
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let raw_ravine_value = ravine_nose_line.get_noise(noise_x, noise_y);
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if (-0.0125..0.0125).contains(&(raw_ravine_value.powi(2))) {
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is_surface = false;
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height -= (100. * (0.0125 - raw_ravine_value.powi(2)) * (1. / 0.0125)).round() as i32;
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}
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}
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height
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};
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//add to heightmap
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if is_surface {
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deco_heightmap[x][z] = Some(height);
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//place dirt
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for y in 0..local_height(height, chunk_position) {
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blocks[x][y][z] = Block::Dirt;
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within_heightmap = true;
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}
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//place stone
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for y in 0..local_height(height - 5 - (raw_heightmap_value * 5.) as i32, chunk_position) {
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blocks[x][y][z] = Block::Stone;
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within_heightmap = true;
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}
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//place grass
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if let Some(y) = local_y_position(height, chunk_position) {
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blocks[x][y][z] = Block::Grass;
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within_heightmap = true;
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}
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} else if let Some(river_fill_height) = river_fill_height {
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//Place water
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for y in 0..local_height(river_fill_height, chunk_position) {
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blocks[x][y][z] = Block::Water;
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within_heightmap = true;
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}
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//Place stone
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for y in 0..local_height(height, chunk_position) {
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blocks[x][y][z] = Block::Stone;
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within_heightmap = true;
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}
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//Place dirt
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if let Some(y) = local_y_position(height, chunk_position) {
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blocks[x][y][z] = Block::Dirt;
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within_heightmap = true;
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}
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} else {
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//Place stone
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for y in 0..local_height(height, chunk_position) {
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blocks[x][y][z] = Block::Stone;
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within_heightmap = true;
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}
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}
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}
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}
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//Carve out caves
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if within_heightmap {
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for z in 0..CHUNK_SIZE {
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for y in 0..CHUNK_SIZE {
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for x in 0..CHUNK_SIZE {
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if blocks[x][y][z] != Block::Stone { continue }
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let cave_size = ((offset.y + y as i32) as f32 / -100.).clamp(0., 1.);
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let inv_cave_size = 1. - cave_size;
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if cave_size < 0.1 { continue }
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let position = ivec3(x as i32, y as i32, z as i32) + offset;
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let is_cave = || {
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let raw_cavemap_value_a = cave_noise_a.get_noise3d(position.x as f32, position.y as f32, position.z as f32);
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let raw_cavemap_value_b = cave_noise_b.get_noise3d(position.x as f32, position.y as f32, position.z as f32);
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((cave_size * -0.15)..=(cave_size * 0.15)).contains(&raw_cavemap_value_a) &&
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((cave_size * -0.15)..=(cave_size * 0.15)).contains(&raw_cavemap_value_b)
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};
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let is_hole_cave = || {
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let raw_cavemap_value_holes = cave_noise_holes.get_noise3d(position.x as f32, position.y as f32, position.z as f32);
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((0.9 + (0.1 * inv_cave_size))..=1.0).contains(&raw_cavemap_value_holes.abs())
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};
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if is_cave() || is_hole_cave() {
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blocks[x][y][z] = Block::Air;
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if deco_heightmap[x][z] == Some(y as i32 + offset.y) {
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deco_heightmap[x][z] = None
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}
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}
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}
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}
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self.blocks[position.x as usize][position.y as usize][position.z as usize] = block;
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}
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}
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//Add decorations
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for x in 0..CHUNK_SIZE {
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for z in 0..CHUNK_SIZE {
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//get height
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let Some(height) = deco_heightmap[x][z] else { continue };
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//check for air
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// if blocks[x][local_y][z] == Block::Air {
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// continue
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// }
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//place tall grass
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if rng_map_a[x][z] < 0.03 {
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if let Some(y) = local_y_position(height + 1, chunk_position) {
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blocks[x][y][z] = Block::TallGrass;
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}
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}
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//place trees!
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if rng_map_a[x][z] < 0.001 {
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//Replace grass with dirt under the tree
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if let Some(y) = local_y_position(height, chunk_position) {
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blocks[x][y][z] = Block::Dirt;
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}
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//Place wood (no smart_place needed here!)
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let tree_height = 4 + (rng_map_b[x][z] * 3.).round() as i32;
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for tree_y in 0..tree_height {
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if let Some(y) = local_y_position(height + 1 + tree_y, chunk_position) {
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blocks[x][y][z] = Block::Wood;
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}
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}
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let tree_height = 4 + (rng_map_b[x][z] * 3.).round() as i32;
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//Place leaf blocks
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if let Some(y) = local_y_position(height + 1, chunk_position) {
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let tree_pos = ivec3(x as i32, y as i32, z as i32);
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// Place wood (smart_place)
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// for tree_y in 0..tree_height {
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// smart_place(&mut blocks, tree_pos + tree_y * IVec3::Y, Block::Wood);
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// }
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// Part that wraps around the tree
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{
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let tree_leaf_height = tree_height - 3;
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let leaf_width = 2;
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for tree_y in tree_leaf_height..tree_height {
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for tree_x in (-leaf_width)..=leaf_width {
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for tree_z in (-leaf_width)..=leaf_width {
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let tree_offset = ivec3(tree_x, tree_y, tree_z);
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if tree_offset.xz() == IVec2::ZERO { continue }
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smart_place(&mut blocks, tree_pos + tree_offset, Block::Leaf);
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}
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}
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}
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}
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//part above the tree
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{
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let leaf_above_height = 2;
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let leaf_width = 1;
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for tree_y in tree_height..(tree_height + leaf_above_height) {
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for tree_x in (-leaf_width)..=leaf_width {
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for tree_z in (-leaf_width)..=leaf_width {
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let tree_offset = ivec3(tree_x, tree_y, tree_z);
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smart_place(&mut blocks, tree_pos + tree_offset, Block::Leaf);
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}
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}
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}
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}
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}
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}
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pub fn new(chunk_position: IVec3, seed: u64) -> Self {
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Self {
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seed,
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chunk_position,
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blocks: Box::new([[[Block::Air; CHUNK_SIZE]; CHUNK_SIZE]; CHUNK_SIZE]),
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queue: Vec::with_capacity(0),
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}
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}
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(blocks, queue)
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// let mut cave_noise = FastNoise::seeded(seed);
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// cave_noise.set_fractal_type(FractalType::FBM);
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// cave_noise.set_frequency(0.1);
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// let mut dirt_noise = FastNoise::seeded(seed.rotate_left(1));
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// dirt_noise.set_fractal_type(FractalType::FBM);
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// dirt_noise.set_frequency(0.1);
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//
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// if chunk_position.y >= 0 {
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// if chunk_position.y == 0 {
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// for x in 0..CHUNK_SIZE {
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// for z in 0..CHUNK_SIZE {
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// blocks[x][0][z] = Block::Dirt;
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// blocks[x][1][z] = Block::Grass;
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// }
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// }
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// }
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// } else {
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// for x in 0..CHUNK_SIZE {
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// for y in 0..CHUNK_SIZE {
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// for z in 0..CHUNK_SIZE {
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// let position = ivec3(x as i32, y as i32, z as i32) + offset;
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// 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.);
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// 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.);
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// if v_cave_noise > 0.5 {
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// blocks[x][y][z] = Block::Stone;
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// } else if v_dirt_noise > 0.5 {
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// blocks[x][y][z] = Block::Dirt;
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// }
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// }
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// }
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// }
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// }
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// blocks
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pub fn generate(mut self, abort: Option<AtomicBool>) -> (BlockData, Vec<QueuedBlock>) {
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run_steps!(&mut self, abort, [
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_01_terrain::TerrainStep
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]);
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(self.blocks, self.queue)
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}
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}
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pub fn generate_world(chunk_position: IVec3, seed: u64) -> (BlockData, Vec<QueuedBlock>) {
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WorldGenerator::new(chunk_position, seed).generate(None)
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}
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28
kubi-shared/src/worldgen/_01_terrain.rs
Normal file
28
kubi-shared/src/worldgen/_01_terrain.rs
Normal file
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@ -0,0 +1,28 @@
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use bracket_noise::prelude::{FastNoise, FractalType};
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use glam::ivec3;
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use crate::{block::Block, chunk::CHUNK_SIZE};
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use super::{WorldGenerator, WorldGenStep};
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pub struct TerrainStep {
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noise: FastNoise,
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||||
}
|
||||
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);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
Loading…
Reference in a new issue