Combine contact events and intersection events into a single event type and flags

src/pipeline/event_handler.rs

@@ -1,14 +1,13 @@
-use crate::geometry::{ContactEvent, ContactPair, IntersectionEvent};
+use crate::geometry::{CollisionEvent, ContactPair};
 use crossbeam::channel::Sender;
 
 bitflags::bitflags! {
     #[cfg_attr(feature = "serde-serialize", derive(Serialize, Deserialize))]
     /// Flags affecting the events generated for this collider.
     pub struct ActiveEvents: u32 {
-        /// If set, Rapier will call `EventHandler::handle_intersection_event` whenever relevant for this collider.
-        const INTERSECTION_EVENTS = 0b0001;
-        /// If set, Rapier will call `PhysicsHooks::handle_contact_event` whenever relevant for this collider.
-        const CONTACT_EVENTS = 0b0010;
+        /// If set, Rapier will call `EventHandler::handle_intersection_event` and
+        /// `EventHandler::handle_contact_event` whenever relevant for this collider.
+        const COLLISION_EVENTS = 0b0001;
     }
 }
 
@@ -22,47 +21,40 @@ impl Default for ActiveEvents {
 ///
 /// Implementors of this trait will typically collect these events for future processing.
 pub trait EventHandler: Send + Sync {
-    /// Handle an intersection event.
+    /// Handle a collision event.
     ///
     /// A intersection event is emitted when the state of intersection between two colliders changes.
-    fn handle_intersection_event(&self, event: IntersectionEvent);
+    fn handle_intersection_event(&self, event: CollisionEvent);
     /// Handle a contact event.
     ///
     /// A contact event is emitted when two collider start or stop touching, independently from the
     /// number of contact points involved.
-    fn handle_contact_event(&self, event: ContactEvent, contact_pair: &ContactPair);
+    fn handle_contact_event(&self, event: CollisionEvent, contact_pair: &ContactPair);
 }
 
 impl EventHandler for () {
-    fn handle_intersection_event(&self, _event: IntersectionEvent) {}
-    fn handle_contact_event(&self, _event: ContactEvent, _contact_pair: &ContactPair) {}
+    fn handle_intersection_event(&self, _event: CollisionEvent) {}
+    fn handle_contact_event(&self, _event: CollisionEvent, _contact_pair: &ContactPair) {}
 }
 
-/// A physics event handler that collects events into a crossbeam channel.
+/// A collision event handler that collects events into a crossbeam channel.
 pub struct ChannelEventCollector {
-    intersection_event_sender: Sender<IntersectionEvent>,
-    contact_event_sender: Sender<ContactEvent>,
+    event_sender: Sender<CollisionEvent>,
 }
 
 impl ChannelEventCollector {
-    /// Initialize a new physics event handler from crossbeam channel senders.
-    pub fn new(
-        intersection_event_sender: Sender<IntersectionEvent>,
-        contact_event_sender: Sender<ContactEvent>,
-    ) -> Self {
-        Self {
-            intersection_event_sender,
-            contact_event_sender,
-        }
+    /// Initialize a new collision event handler from crossbeam channel senders.
+    pub fn new(event_sender: Sender<CollisionEvent>) -> Self {
+        Self { event_sender }
     }
 }
 
 impl EventHandler for ChannelEventCollector {
-    fn handle_intersection_event(&self, event: IntersectionEvent) {
-        let _ = self.intersection_event_sender.send(event);
+    fn handle_intersection_event(&self, event: CollisionEvent) {
+        let _ = self.event_sender.send(event);
     }
 
-    fn handle_contact_event(&self, event: ContactEvent, _: &ContactPair) {
-        let _ = self.contact_event_sender.send(event);
+    fn handle_contact_event(&self, event: CollisionEvent, _: &ContactPair) {
+        let _ = self.event_sender.send(event);
     }
 }