1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
pub use bevy_ecs_macros::Bundle;
use crate::{
archetype::ComponentStatus,
component::{Component, ComponentId, ComponentTicks, Components, StorageType, TypeInfo},
entity::Entity,
storage::{SparseSetIndex, SparseSets, Table},
};
use bevy_ecs_macros::all_tuples;
use std::{any::TypeId, collections::HashMap};
pub unsafe trait Bundle: Send + Sync + 'static {
fn type_info() -> Vec<TypeInfo>;
unsafe fn from_components(func: impl FnMut() -> *mut u8) -> Self
where
Self: Sized;
fn get_components(self, func: impl FnMut(*mut u8));
}
macro_rules! tuple_impl {
($($name: ident),*) => {
unsafe impl<$($name: Component),*> Bundle for ($($name,)*) {
fn type_info() -> Vec<TypeInfo> {
vec![$(TypeInfo::of::<$name>()),*]
}
#[allow(unused_variables, unused_mut)]
unsafe fn from_components(mut func: impl FnMut() -> *mut u8) -> Self {
#[allow(non_snake_case)]
let ($(mut $name,)*) = (
$(func().cast::<$name>(),)*
);
($($name.read(),)*)
}
#[allow(unused_variables, unused_mut)]
fn get_components(self, mut func: impl FnMut(*mut u8)) {
#[allow(non_snake_case)]
let ($(mut $name,)*) = self;
$(
func((&mut $name as *mut $name).cast::<u8>());
std::mem::forget($name);
)*
}
}
}
}
all_tuples!(tuple_impl, 0, 15, C);
#[derive(Debug, Clone, Copy)]
pub struct BundleId(usize);
impl BundleId {
#[inline]
pub fn index(self) -> usize {
self.0
}
}
impl SparseSetIndex for BundleId {
#[inline]
fn sparse_set_index(&self) -> usize {
self.index()
}
fn get_sparse_set_index(value: usize) -> Self {
Self(value)
}
}
pub struct BundleInfo {
pub(crate) id: BundleId,
pub(crate) component_ids: Vec<ComponentId>,
pub(crate) storage_types: Vec<StorageType>,
}
impl BundleInfo {
#[allow(clippy::clippy::too_many_arguments)]
#[inline]
pub(crate) unsafe fn write_components<T: Bundle>(
&self,
sparse_sets: &mut SparseSets,
entity: Entity,
table: &Table,
table_row: usize,
bundle_status: &[ComponentStatus],
bundle: T,
change_tick: u32,
) {
let mut bundle_component = 0;
bundle.get_components(|component_ptr| {
let component_id = *self.component_ids.get_unchecked(bundle_component);
let component_status = bundle_status.get_unchecked(bundle_component);
match self.storage_types[bundle_component] {
StorageType::Table => {
let column = table.get_column(component_id).unwrap();
column.set_unchecked(table_row, component_ptr);
let column_status = column.get_ticks_unchecked_mut(table_row);
match component_status {
ComponentStatus::Added => {
*column_status = ComponentTicks::new(change_tick);
}
ComponentStatus::Mutated => {
column_status.set_changed(change_tick);
}
}
}
StorageType::SparseSet => {
let sparse_set = sparse_sets.get_mut(component_id).unwrap();
sparse_set.insert(entity, component_ptr, change_tick);
}
}
bundle_component += 1;
});
}
#[inline]
pub fn id(&self) -> BundleId {
self.id
}
#[inline]
pub fn components(&self) -> &[ComponentId] {
&self.component_ids
}
#[inline]
pub fn storage_types(&self) -> &[StorageType] {
&self.storage_types
}
}
#[derive(Default)]
pub struct Bundles {
bundle_infos: Vec<BundleInfo>,
bundle_ids: HashMap<TypeId, BundleId>,
}
impl Bundles {
#[inline]
pub fn get(&self, bundle_id: BundleId) -> Option<&BundleInfo> {
self.bundle_infos.get(bundle_id.index())
}
#[inline]
pub fn get_id(&self, type_id: TypeId) -> Option<BundleId> {
self.bundle_ids.get(&type_id).cloned()
}
pub(crate) fn init_info<'a, T: Bundle>(
&'a mut self,
components: &mut Components,
) -> &'a BundleInfo {
let bundle_infos = &mut self.bundle_infos;
let id = self.bundle_ids.entry(TypeId::of::<T>()).or_insert_with(|| {
let type_info = T::type_info();
let id = BundleId(bundle_infos.len());
let bundle_info =
initialize_bundle(std::any::type_name::<T>(), &type_info, id, components);
bundle_infos.push(bundle_info);
id
});
unsafe { self.bundle_infos.get_unchecked(id.0) }
}
}
fn initialize_bundle(
bundle_type_name: &'static str,
type_info: &[TypeInfo],
id: BundleId,
components: &mut Components,
) -> BundleInfo {
let mut component_ids = Vec::new();
let mut storage_types = Vec::new();
for type_info in type_info {
let component_id = components.get_or_insert_with(type_info.type_id(), || type_info.clone());
let info = unsafe { components.get_info_unchecked(component_id) };
component_ids.push(component_id);
storage_types.push(info.storage_type());
}
let mut deduped = component_ids.clone();
deduped.sort();
deduped.dedup();
if deduped.len() != component_ids.len() {
panic!("Bundle {} has duplicate components", bundle_type_name);
}
BundleInfo {
id,
component_ids,
storage_types,
}
}