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improve worldgen

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griffi-gh 2023-02-18 00:37:17 +01:00
parent fd54eb7e4e
commit 9268a293a8
3 changed files with 106 additions and 27 deletions
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7
kubi-shared/src/block.rs
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@ -25,6 +25,7 @@ pub enum BlockTexture {
#[repr(u8)]
pub enum Block {
Air,
Marker,
Stone,
Dirt,
Grass,
@ -47,6 +48,12 @@ impl Block {
collision: CollisionType::None,
raycast_collision: false,
},
Self::Marker => BlockDescriptor {
name: "marker",
render: RenderType::None,
collision: CollisionType::None,
raycast_collision: false,
},
Self::Stone => BlockDescriptor {
name: "stone",
render: RenderType::SolidBlock(CubeTexture::all(BlockTexture::Stone)),

126
kubi-shared/src/worldgen.rs
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@ -63,7 +63,7 @@ pub fn generate_world(chunk_position: IVec3, seed: u64) -> (BlockData, Vec<Queue
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);
@ -76,9 +76,24 @@ pub fn generate_world(chunk_position: IVec3, seed: u64) -> (BlockData, Vec<Queue
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(1);
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) << 0)
@ -89,36 +104,66 @@ pub fn generate_world(chunk_position: IVec3, seed: u64) -> (BlockData, Vec<Queue
//Generate height map
let mut within_heightmap = false;
let mut heightmap = [[0i32; CHUNK_SIZE]; CHUNK_SIZE];
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
//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;
if height < 0 { height /= 2 }
//Generate rivers
{
let river_value = river_noise.get_noise(noise_x, noise_y);
if (-0.00625..0.00625).contains(&(river_value.powi(2))) {
is_surface = false;
river_fill_height = Some(height);
height -= (20. * (0.00625 - river_value.powi(2)) * (1. / 0.00625)).round() as i32;
}
}
if height < 0 {
height /= 2; //Flatten valleys
//Generate ravines
if 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
heightmap[x as usize][z as usize] = 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;
if is_surface {
deco_heightmap[x as usize][z as usize] = 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 {
for y in 0..local_height(height, chunk_position) {
blocks[x][y][z] = Block::Stone;
within_heightmap = true;
}
}
}
}
@ -128,15 +173,30 @@ pub fn generate_world(chunk_position: IVec3, seed: u64) -> (BlockData, Vec<Queue
for z in 0..CHUNK_SIZE {
for y in 0..CHUNK_SIZE {
for x in 0..CHUNK_SIZE {
if blocks[x][y][z] == Block::Air { continue }
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 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);
let raw_cavemap_value_holes = cave_noise_holes.get_noise3d(position.x as f32, position.y as f32, position.z as f32);
let is_cave = (-0.1..=0.1).contains(&raw_cavemap_value_a) && (-0.1..=0.1).contains(&raw_cavemap_value_b);
let is_hole_cave = (0.9..=1.0).contains(&raw_cavemap_value_holes.abs());
if is_cave || is_hole_cave {
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
}
}
}
}
@ -147,7 +207,11 @@ pub fn generate_world(chunk_position: IVec3, seed: u64) -> (BlockData, Vec<Queue
for x in 0..CHUNK_SIZE {
for z in 0..CHUNK_SIZE {
//get height
let height = heightmap[x][z];
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) {
@ -163,9 +227,16 @@ pub fn generate_world(chunk_position: IVec3, seed: u64) -> (BlockData, Vec<Queue
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;
@ -197,6 +268,7 @@ pub fn generate_world(chunk_position: IVec3, seed: u64) -> (BlockData, Vec<Queue
}
}
}
(blocks, queue)
// let mut cave_noise = FastNoise::seeded(seed);