regecs 2.0.0-alpha-1

// Copyright (c) 2021, BlockProject 3D
//
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//
// Redistribution and use in source and binary forms, with or without modification,
// are permitted provided that the following conditions are met:
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//       this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above copyright notice,
//       this list of conditions and the following disclaimer in the documentation
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//       may be used to endorse or promote products derived from this software
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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use crate::{component::Clear, event::EventManager, object::Tree};
use crate::scene::EventInfo;

pub trait Context
{
    type AppState;
    type ComponentManager: Clear;
    type Event;

    fn components(&self) -> &Self::ComponentManager;
    fn components_mut(&mut self) -> &mut Self::ComponentManager;
    fn event_manager(&mut self) -> &mut EventManager<Self::Event>;
    fn objects(&self) -> &Tree;
    fn enable_object(&mut self, info: EventInfo, enable: bool);
}

/// Update functionality.
pub trait Update<C: Context>
{
    fn update(&mut self, ctx: &mut C, state: &C::AppState);
}