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[Merged by Bors] - Add system sets and run criteria example #1909

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[Merged by Bors] - Add system sets and run criteria example #1909

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33405da
Add system sets and run criteria example
torsteingrindvik Apr 13, 2021
edcb9d6
Mention label produced via string literal
torsteingrindvik Apr 13, 2021
b02bb4f
Explicitly mention the pitfall of using run criteria after state tran…
torsteingrindvik Apr 23, 2021
b0e909b
Review nits
torsteingrindvik Apr 23, 2021
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5 changes: 5 additions & 0 deletions examples/ecs/system_sets.rs
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Expand Up @@ -51,6 +51,11 @@ fn main() {
App::build()
.add_plugins(DefaultPlugins)
.init_resource::<Done>()
// Note that the system sets added in this example sets their run criteria explicitly.
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nit: "Note that the system sets added in this example set their run criteria explicitly."

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Fixed.

// See the `ecs/state.rs` example for a pattern where run criteria are set implicitly for common
// use cases- typically state transitions.
// Also note that a system set has a single run criterion at most, which means using `.with_run_criteria(...)`
// after `SystemSet::on_update(...)` would override the state transition criterion.
.add_system_set(
SystemSet::new()
// This label is added to all systems in this set.
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