Conditional Commands
Provides an extension trait ConditionalEntityCommandsExt on Bevy EntityCommands.
It adds three new methods:
insert_ifinsert_bundle_ifwith_children_if
that allow for conditional component, bundle, and child insertion without the need for an intermediate EntityCommands binding.
- Supports Bevy 0.7
#
Usage
Add to your Cargo.toml [Dependencies] section
conditional_commands = "0.1"
Then access with the use declaration
rust
use conditional_commands::*;
#
Contrived ECS Fizz-Buzz Example
```rust
use bevy::prelude::*;
[derive(Component)]
struct Number(usize);
[derive(Component)]
struct Fizz;
[derive(Component)]
struct Buzz;
fn fizzbuzz(
mut commands: Commands
) {
for n in 1 ..= N {
let mut entitycommands = commands.spawn();
if n % 3 {
(0, 0) => { entitycommands.insertbundle((Fizz, Buzz)); },
(0, ) => { entitycommands.insert(Fizz); },
(, 0) => { entitycommands.insert(Buzz); },
_ => { entity_commands.insert(Number(n)); }
}
}
}
```
With Conditional Commands we no longer need the intermediate EntityCommands binding.
```rust
use conditional_commands::*;
fn fizzbuzz(
mut commands: Commands
) {
for n in 1 ..= N {
commands
.spawn()
.insertif(0 < n % 3 && 0 < n % 5, Number(n))
.insertif(n % 3 == 0, Fizz)
.insertif(n % 5 == 0, Buzz);
}
}
```