52 lines
1.7 KiB
Rust
52 lines
1.7 KiB
Rust
use crate::geometry::{ContactEvent, ProximityEvent};
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use crossbeam::channel::Sender;
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/// Trait implemented by structures responsible for handling events generated by the physics engine.
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///
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/// Implementors of this trait will typically collect these events for future processing.
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pub trait EventHandler: Send + Sync {
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/// Handle a proximity event.
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///
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/// A proximity event is emitted when the state of proximity between two colliders changes.
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fn handle_proximity_event(&self, event: ProximityEvent);
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/// Handle a contact event.
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///
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/// A contact event is emitted when two collider start or stop touching, independently from the
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/// number of contact points involved.
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fn handle_contact_event(&self, event: ContactEvent);
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}
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impl EventHandler for () {
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fn handle_proximity_event(&self, _event: ProximityEvent) {}
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fn handle_contact_event(&self, _event: ContactEvent) {}
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}
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/// A physics event handler that collects events into a crossbeam channel.
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pub struct ChannelEventCollector {
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proximity_event_sender: Sender<ProximityEvent>,
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contact_event_sender: Sender<ContactEvent>,
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}
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impl ChannelEventCollector {
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/// Initialize a new physics event handler from crossbeam channel senders.
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pub fn new(
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proximity_event_sender: Sender<ProximityEvent>,
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contact_event_sender: Sender<ContactEvent>,
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) -> Self {
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Self {
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proximity_event_sender,
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contact_event_sender,
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}
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}
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}
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impl EventHandler for ChannelEventCollector {
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fn handle_proximity_event(&self, event: ProximityEvent) {
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let _ = self.proximity_event_sender.send(event);
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}
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fn handle_contact_event(&self, event: ContactEvent) {
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let _ = self.contact_event_sender.send(event);
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}
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}
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