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voxel-rs
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Move neighbour block getting into the brickmap culling function

This commit is contained in:
Jarrod Doyle 2023-07-28 12:20:27 +01:00
parent 7cdca0a406
commit a91b48bf46
Signed by: Jayrude
GPG Key ID: 38B57B16E7C0ADF7
1 changed files with 28 additions and 41 deletions
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69
src/voxel/brickmap.rs
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@ -236,34 +236,10 @@ impl BrickmapManager {
glam::uvec3(grid_dims[0], grid_dims[1], grid_dims[2]),
);
// Get block + neighbour blocks
// Cull based on that
// We only want to upload voxels that are on the surface, so we cull anything
// that is surrounded by solid voxels
let grid_pos = grid_pos.as_ivec3();
let center_pos = Self::grid_pos_to_world_pos(world, grid_pos);
let forward_pos = Self::grid_pos_to_world_pos(world, grid_pos + glam::ivec3(1, 0, 0));
let backward_pos = Self::grid_pos_to_world_pos(world, grid_pos + glam::ivec3(-1, 0, 0));
let left_pos = Self::grid_pos_to_world_pos(world, grid_pos + glam::ivec3(0, 0, -1));
let right_pos = Self::grid_pos_to_world_pos(world, grid_pos + glam::ivec3(0, 0, 1));
let up_pos = Self::grid_pos_to_world_pos(world, grid_pos + glam::ivec3(0, 1, 0));
let down_pos = Self::grid_pos_to_world_pos(world, grid_pos + glam::ivec3(0, -1, 0));
let center_block = world.get_block(center_pos.0, center_pos.1);
let forward_block = world.get_block(forward_pos.0, forward_pos.1);
let backward_block = world.get_block(backward_pos.0, backward_pos.1);
let left_block = world.get_block(left_pos.0, left_pos.1);
let right_block = world.get_block(right_pos.0, right_pos.1);
let up_block = world.get_block(up_pos.0, up_pos.1);
let down_block = world.get_block(down_pos.0, down_pos.1);
let (bitmask_data, albedo_data) = Self::cull_interior_voxels(
&center_block,
&forward_block,
&backward_block,
&left_block,
&right_block,
&up_block,
&down_block,
);
let (bitmask_data, albedo_data) = Self::cull_interior_voxels(world, grid_pos);
// If there's no voxel colour data post-culling it means the brickmap is
// empty. We don't need to upload it, just mark the relevant brickgrid entry.
@ -417,22 +393,33 @@ impl BrickmapManager {
}
}
// TODO: Account for neighbours in other blocks
// - We should operate on a halo block
// - The world should be responsible for providing a halo perhaps
// - Or rather, perhaps we should just be able to request a range of voxels from the world
// and it will just work out which "blocks" it needs to give us them
fn cull_interior_voxels(
center_block: &[super::world::Voxel],
forward_block: &[super::world::Voxel],
backward_block: &[super::world::Voxel],
left_block: &[super::world::Voxel],
right_block: &[super::world::Voxel],
up_block: &[super::world::Voxel],
down_block: &[super::world::Voxel],
world: &mut super::world::WorldManager,
grid_pos: glam::IVec3,
) -> ([u32; 16], Vec<u32>) {
// This is the data we want to return
let mut bitmask_data = [0xFFFFFFFF_u32; 16];
let mut albedo_data = Vec::<u32>::new();
// Calculate world chunk and block positions for each that may be accessed
let center_pos = Self::grid_pos_to_world_pos(world, grid_pos);
let forward_pos = Self::grid_pos_to_world_pos(world, grid_pos + glam::ivec3(1, 0, 0));
let backward_pos = Self::grid_pos_to_world_pos(world, grid_pos + glam::ivec3(-1, 0, 0));
let left_pos = Self::grid_pos_to_world_pos(world, grid_pos + glam::ivec3(0, 0, -1));
let right_pos = Self::grid_pos_to_world_pos(world, grid_pos + glam::ivec3(0, 0, 1));
let up_pos = Self::grid_pos_to_world_pos(world, grid_pos + glam::ivec3(0, 1, 0));
let down_pos = Self::grid_pos_to_world_pos(world, grid_pos + glam::ivec3(0, -1, 0));
// Fetch those blocks
let center_block = world.get_block(center_pos.0, center_pos.1);
let forward_block = world.get_block(forward_pos.0, forward_pos.1);
let backward_block = world.get_block(backward_pos.0, backward_pos.1);
let left_block = world.get_block(left_pos.0, left_pos.1);
let right_block = world.get_block(right_pos.0, right_pos.1);
let up_block = world.get_block(up_pos.0, up_pos.1);
let down_block = world.get_block(down_pos.0, down_pos.1);
// Reusable array of whether cardinal neighbours are empty
let mut neighbours = [false; 6];
for z in 0..8 {
// Each z level contains two bitmask segments of voxels
@ -484,10 +471,9 @@ impl BrickmapManager {
center_block[idx - 8] == empty_voxel
};
let surface_voxel = neighbours.iter().any(|v| *v);
// Set the appropriate bit in the z entry and add the
// shading data
let surface_voxel = neighbours.iter().any(|v| *v);
if surface_voxel {
entry += 1 << (x + y * 8);
let albedo = ((r as u32) << 24)
@ -504,6 +490,7 @@ impl BrickmapManager {
bitmask_data[offset] = (entry & 0xFFFFFFFF).try_into().unwrap();
bitmask_data[offset + 1] = ((entry >> 32) & 0xFFFFFFFF).try_into().unwrap();
}
(bitmask_data, albedo_data)
}