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0907ec1d94
I ran into an issue when trying to add the transform propagation systems
to a schedule more than once. The app would panic because there was more
than one instance of `propagate_transforms::<P>` and
`recenter_transform_on_grid::<P>` in the system graph, so Bevy didn't
know how to actually resolve the dependencies. By using a `SystemSet`,
we can avoid this issue nicely.
Unfortunately, I couldn't come up with a good name for the set, so I
decided to stick the definition inside the `build()` method itself. That
way at least the poor naming won't be exposed 😛. It still feels a little
icky to me though.
---------
Co-authored-by: Aevyrie <aevyrie@gmail.com>
Co-authored-by: Pyxrs <simplycmd00@gmail.com>
54 lines
2.4 KiB
Markdown
54 lines
2.4 KiB
Markdown
<div align="center">
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# Big Space
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[](https://crates.io/crates/big_space)
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[](https://docs.rs/big_space)
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[](https://github.com/aevyrie/big_space/actions/workflows/rust.yml)
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[](https://github.com/bevyengine/bevy/blob/main/docs/plugins_guidelines.md#main-branch-tracking)
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A floating origin plugin for [Bevy](https://github.com/bevyengine/bevy).
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https://user-images.githubusercontent.com/2632925/215318129-5bab3095-a7dd-455b-a4b6-71840cde096c.mp4
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### [Read the docs](https://docs.rs/big_space)
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</div>
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## Features
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Lots of space to play in.
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This is a simple floating origin plugin, useful if you want to work with very, very large scales. It works with bevy's existing `f32`-based `Transform`s, which means it's largely compatible with the bevy ecosystem.
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The plugin is generic over a few integer types, to trade off scale and precision for memory use. Some fun numbers with a worst case precision of 0.5mm:
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- `i8`: 2,560 km = 74% of the diameter of the Moon
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- `i16`: 655,350 km = 85% of the diameter of the Moon's orbit around Earth
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- `i32`: 0.0045 light years = ~4 times the width of the solar system
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- `i64`: 19.5 million light years = ~100 times the width of the milky way galaxy
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- `i128`: 3.6e+26 light years = ~3.9e+15 times the width of the observable universe
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From the docs: https://docs.rs/big_space/latest/big_space/struct.GridCell.html
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# Bevy Version Support
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I intend to track the `main` branch of Bevy. PRs supporting this are welcome!
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| bevy | big_space |
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| ---- | --------- |
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| 0.12 | 0.4 |
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| 0.11 | 0.3 |
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| 0.10 | 0.2 |
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| 0.9 | 0.1 |
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# License
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This project is dual licensed:
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* MIT License ([LICENSE-MIT](LICENSE-MIT) or [http://opensource.org/licenses/MIT](http://opensource.org/licenses/MIT))
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* Apache License, Version 2.0 ([LICENSE-APACHE](LICENSE-APACHE) or [http://www.apache.org/licenses/LICENSE-2.0](http://www.apache.org/licenses/LICENSE-2.0))
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## Contribution
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Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.
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