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cave generation (no scaling yet!)

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griffi-gh 2023-02-17 23:05:55 +01:00
parent 91bc3f50a8
commit 8dc682c9e0
1 changed files with 37 additions and 19 deletions
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56
kubi-shared/src/worldgen.rs
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@ -74,6 +74,11 @@ pub fn generate_world(chunk_position: IVec3, seed: u64) -> (BlockData, Vec<Queue
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(1);
cave_noise_holes.set_frequency(0.005);
let mut rng = Xoshiro256StarStar::seed_from_u64(
seed
^ ((chunk_position.x as u32 as u64) << 0)
@ -84,6 +89,8 @@ 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];
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);
@ -97,6 +104,8 @@ pub fn generate_world(chunk_position: IVec3, seed: u64) -> (BlockData, Vec<Queue
if height < 0 { height /= 2 }
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;
@ -111,6 +120,34 @@ pub fn generate_world(chunk_position: IVec3, seed: u64) -> (BlockData, Vec<Queue
if let Some(y) = local_y_position(height, chunk_position) {
blocks[x][y][z] = Block::Grass;
}
}
}
//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::Air { 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 {
blocks[x][y][z] = Block::Air;
}
}
}
}
}
//Add decorations
for x in 0..CHUNK_SIZE {
for z in 0..CHUNK_SIZE {
//get height
let height = heightmap[x][z];
//place tall grass
if rng_map_a[x][z] < 0.03 {
if let Some(y) = local_y_position(height + 1, chunk_position) {
@ -160,25 +197,6 @@ pub fn generate_world(chunk_position: IVec3, seed: u64) -> (BlockData, Vec<Queue
}
}
}
//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::Air { 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 is_cave = (-0.1..=0.1).contains(&raw_cavemap_value_a) && (-0.1..=0.1).contains(&raw_cavemap_value_b);
if is_cave {
blocks[x][y][z] = Block::Air;
}
}
}
}
}
(blocks, queue)
// let mut cave_noise = FastNoise::seeded(seed);