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voxel-rs
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Extract chunk block generation out to it's own function

This commit is contained in:
Jarrod Doyle 2023-07-28 11:45:24 +01:00
parent 42fdf48660
commit e1d621f573
Signed by: Jayrude
GPG Key ID: 38B57B16E7C0ADF7
1 changed files with 44 additions and 38 deletions
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82
src/voxel/world.rs
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@ -22,56 +22,62 @@ impl Chunk {
self.blocks.len(),
(chunk_dims.x * chunk_dims.y * chunk_dims.z) as usize
);
let block = &self.blocks[block_idx];
if !block.is_empty() {
block.to_owned()
} else {
self.gen_block(pos, block_idx, noise_dims);
self.blocks[block_idx].to_owned()
}
}
fn gen_block(&mut self, block_pos: glam::UVec3, block_idx: usize, noise_dims: glam::UVec3) {
let block = &mut self.blocks[block_idx];
if block.is_empty() {
// Extract relevant noise values from the chunk
let mut noise_vals = Vec::new();
let mut block_sign = 0.0;
for z in 0..2 {
for y in 0..2 {
for x in 0..2 {
let noise_pos = glam::uvec3(x, y, z) + pos;
let noise_idx = math::to_1d_index(noise_pos, noise_dims);
let val = self.noise[noise_idx];
noise_vals.push(val);
block_sign += val.signum();
}
// Extract relevant noise values from the chunk
let mut noise_vals = Vec::new();
let mut block_sign = 0.0;
for z in 0..2 {
for y in 0..2 {
for x in 0..2 {
let noise_pos = glam::uvec3(x, y, z) + block_pos;
let noise_idx = math::to_1d_index(noise_pos, noise_dims);
let val = self.noise[noise_idx];
noise_vals.push(val);
block_sign += val.signum();
}
}
}
// If all the corners are negative, then all the interpolated values
// will be negative too. In that case we can just fill with empty.
if block_sign == -8.0 {
block.resize(512, Voxel::Empty);
} else {
let mut vals = [0.0f32; 512];
math::tri_lerp_block(&noise_vals, &[8, 8, 8], &mut vals);
// If all the corners are negative, then all the interpolated values
// will be negative too. In that case we can just fill with empty.
if block_sign == -8.0 {
block.resize(512, Voxel::Empty);
} else {
let mut vals = [0.0f32; 512];
math::tri_lerp_block(&noise_vals, &[8, 8, 8], &mut vals);
// TODO: Better voxel colours
let mut idx = 0;
for z in 0..8 {
for y in 0..8 {
for x in 0..8 {
let val = vals[idx];
idx += 1;
// TODO: Better voxel colours
let mut idx = 0;
for z in 0..8 {
for y in 0..8 {
for x in 0..8 {
let val = vals[idx];
idx += 1;
if val > 0.0 {
let r = ((x + 1) * 32 - 1) as u8;
let g = ((y + 1) * 32 - 1) as u8;
let b = ((z + 1) * 32 - 1) as u8;
block.push(Voxel::Color(r, g, b));
} else {
block.push(Voxel::Empty);
}
if val > 0.0 {
let r = ((x + 1) * 32 - 1) as u8;
let g = ((y + 1) * 32 - 1) as u8;
let b = ((z + 1) * 32 - 1) as u8;
block.push(Voxel::Color(r, g, b));
} else {
block.push(Voxel::Empty);
}
}
}
}
}
block.to_owned()
}
}