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change occupancy mask from an bool array to a bitmask and clean up some bugs

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This commit is contained in:
Tuomas Katajisto 2026-09-19 11:35:28 +03:00
parent e601e5e85d
commit eeddecb63c
3 changed files with 35 additions and 18 deletions
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2
src/editor/level_editor.jai
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@ -498,6 +498,7 @@ add_trile :: (name: string, x: s32, y: s32, z: s32, orientation: u8 = 0) {
array_add(*chunk.groups, group);
}
invalidate_buried_around(*curworld.world, x, y, z);
chunk_set_occupancy_mask_at(chunk, lx, ly, lz, true);
} @Command
remove_trile :: (x: s32, y: s32, z: s32) {
@ -524,6 +525,7 @@ remove_trile :: (x: s32, y: s32, z: s32) {
if removed break;
}
if removed invalidate_buried_around(*curworld.world, x, y, z);
chunk_set_occupancy_mask_at(chunk, lx, ly, lz, false);
} @Command

11
src/pseudophysics/worldphysics.jai
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@ -1,15 +1,12 @@
is_trile_collision :: (fx: float, fy: float, fz: float) -> bool {
x := cast(s32)fx;
y := cast(s32)fy;
z := cast(s32)fz;
x := cast(s32)floor(fx);
y := cast(s32)floor(fy);
z := cast(s32)floor(fz);
world := get_current_world();
key := world_to_chunk_coord(x, y, z);
chunk := table_find_pointer(*world.world.chunks, key);
if !chunk then return false;
lx, ly, lz := world_to_local(x, y, z);
print("% % %\n", lx, ly, lz);
return chunk.occupancy_mask[lx][ly][lz];
return chunk_get_occupancy_mask_at(chunk, lx, ly, lz);
}

40
src/world.jai
View File

@ -59,13 +59,38 @@ Chunk :: struct {
coord: Chunk_Key;
groups: [..]Chunk_Trile_Group;
occupancy_mask : [32][32][32]bool;
// This goes x,z,y so y is the bitmask because
// that is useful when we're checking for ground under
// entities
occupancy_mask : [32][32]u32;
sh_probe_grid: sg_image; // 192x4096 RGBA16F 2D texture (2 probes/trile/axis)
sh_valid: bool;
sh_dirty: bool;
}
// @Note: these are local coords inside the chunk
chunk_get_occupancy_mask_at :: inline (chunk: *Chunk, lx: u32, ly: u32, lz: u32) -> bool {
return (chunk.occupancy_mask[lx][lz] & (cast(u32)1 << ly)) != 0;
}
// @Note: these are local coords inside the chunk
chunk_set_occupancy_mask_at :: inline (chunk: *Chunk, lx: u32, ly: u32, lz: u32, occupied: bool) {
if occupied {
chunk.occupancy_mask[lx][lz] |= (cast(u32)1 << ly);
} else {
chunk.occupancy_mask[lx][lz] &= ~(cast(u32)1 << ly);
}
}
chunk_clear_full_occupancy_mask :: (chunk: *Chunk) {
for i: 0..31 {
for j: 0..31 {
chunk.occupancy_mask[cast(u32)i][cast(u32)j] = 0;
}
}
}
Editor_Note :: struct {
position : Chunk_Key;
text : string;
@ -100,21 +125,14 @@ World :: struct {
}
calculate_and_set_chunk_occupancy_mask :: (chunk: *Chunk) {
print("Calculating occupancy mask for chunk %\n", chunk.coord);
// Clear it first:
for i: 0..15 {
for j: 0..15 {
for k: 0..15 {
chunk.occupancy_mask[i][j][k] = false;
}
}
}
chunk_clear_full_occupancy_mask(chunk);
for group: chunk.groups {
// @ToDo: Handle non-colliding triles by getting the
// trile data here and continuing if it's non-colliding.
for instance : group.instances {
chunk.occupancy_mask[instance.x][instance.y][instance.z] = true;
chunk_set_occupancy_mask_at(chunk, instance.x, instance.y, instance.z, true);
}
}
}