bevy-flights

A crate for handling flying projectiles, especially in bullet-hell games in bevy.

WORK IN PROGRESS

lib.rs:

The purpose of this crate is the modelisation of complex flights that you can find in danmaku games, especially touhou.

How to use:

• add plugin bevy_flight::prelude::DefaultFlightsPlugin<_>::default() to your app.
• insert flight components on your bullets such as bevy_flight::flights::AffineFlight2d.

How to create custom flight components:

• implement trait bevy_flight::flights::FlightDescriptor you are require to implement associated method fn transform(self, t: f32, transform: &mut Transform) where t is usually the elapsed time since the app began given by Res but may also be customized to your needs through the plugin It's done this way for the zero cost abstraction, as well as modularity You only address the memory which you wanna change.
• You could also implement another trait such as Translation2dDescriptor thus implementing fn translation(&self, t: f32) -> Vec2 and call .wrap() on it to make it into a component
• add system bevy_flight::plugin::flight_system::<T> to your app, or if you used Translation2dDescriptor bevy_flight::plugin::position2D_system::<T>
• insert your custom flight component to your bullets call wrap if necessary.

How to create sums of flights:

• You may create things like bevy_flights::composites::TranslationSum2d<CircleFlight, LinearFlight> This implements Translation2dDescriptor.
• Dont forget to add system position2D_system for TranslationSum2d<A, B> Because it's not included in the DefaultFlightsPlugin, even if A and B are. ( that would be impossible anyway, one would have to insert an infinite amount of systems )