[Merged by Bors] - Add example for run conditions #7652
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alice-i-cecile
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| // this is useful for small, simple run conditions you don't need to reuse. | ||
| // All the normal rules still apply, all parameters must be read only except for local parameters | ||
| // In this case we will only run if the input counter resource exists and has changed but not just been added | ||
| .run_if(|res: Option<Res<InputCounter>>| { |
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Am I correct in thinking that once #7605 in merged we could do something like this?
.run_if(resource_exists::<InputCounter>())
.and_then(|counter: Res<InputCounter>| counter.is_changed() && !counter.is_added())
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Yep, precisely :) Interestingly, the short circuiting nature would make sure that the second run condition doesn't panic. That's nice.
Co-authored-by: Alice Cecile <alice.i.cecile@gmail.com>
alice-i-cecile
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JoJoJet
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Feb 17, 2023
Co-authored-by: JoJoJet <21144246+JoJoJet@users.noreply.github.com>
alice-i-cecile
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Feb 18, 2023
JoJoJet
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Feb 18, 2023
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bors r+ |
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Github plz. bors r+ |
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Pull request successfully merged into main. Build succeeded:
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Feb 18, 2023
Added an example for run conditions. Fixes bevyengine#7646 if we wait till bevyengine#7605 is merged and include some of it features.
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Added an example for run conditions. Fixes #7646 if we wait till #7605 is merged and include some of it features.