use na::RealField;
use std::any::Any;
use crate::math::Point;
use crate::query::{Ray, RayIntersection};
#[derive(Copy, Clone, Debug, PartialEq, Eq, PartialOrd, Ord, Hash)]
pub struct BroadPhaseProxyHandle(pub usize);
impl BroadPhaseProxyHandle {
#[inline]
pub fn invalid() -> Self {
BroadPhaseProxyHandle(usize::max_value())
}
#[inline]
pub fn is_invalid(&self) -> bool {
self.0 == usize::max_value()
}
#[inline]
pub fn uid(&self) -> usize {
self.0
}
}
/// Proximity handling for BroadPhase updates.
pub trait BroadPhaseInterferenceHandler<T> {
/// A pre-filter that may cheaply discard objects before checking for bounding volume
/// interference.
fn is_interference_allowed(&mut self, data1: &T, data2: &T) -> bool;
/// Handle a starting interference.
fn interference_started(&mut self, data1: &T, data2: &T);
/// Handle a stopping interference.
fn interference_stopped(&mut self, data1: &T, data2: &T);
}
/// Trait all broad phase must implement.
pub trait BroadPhase<N: RealField + Copy, BV, T>: Any + Sync + Send {
/// Tells the broad phase to add a bounding-volume at the next update.
fn create_proxy(&mut self, bv: BV, data: T) -> BroadPhaseProxyHandle;
/// Retrieves the bounding volume and data associated to the given proxy.
fn proxy(&self, handle: BroadPhaseProxyHandle) -> Option<(&BV, &T)>;
/// Tells the broad phase to remove the given set of handles.
fn remove(
&mut self,
handles: &[BroadPhaseProxyHandle],
removal_handler: &mut dyn FnMut(&T, &T),
);
/// Sets the next bounding volume to be used during the update of this broad phase.
fn deferred_set_bounding_volume(&mut self, handle: BroadPhaseProxyHandle, bv: BV);
/// Forces the broad-phase to recompute and re-report all the proximities with the given object.
fn deferred_recompute_all_proximities_with(&mut self, handle: BroadPhaseProxyHandle);
/// Forces the broad-phase to recompute and re-report all the proximities.
fn deferred_recompute_all_proximities(&mut self);
/// Updates the object additions, removals, and interferences detection.
fn update(&mut self, handler: &mut dyn BroadPhaseInterferenceHandler<T>);
/*
* FIXME: the following are not flexible enough.
*/
// XXX: return iterators when associated types work.
/// Collects every object which might intersect a given bounding volume.
fn interferences_with_bounding_volume<'a>(&'a self, bv: &BV, out: &mut Vec<&'a T>);
/// Collects every object which might intersect a given ray.
fn interferences_with_ray<'a>(&'a self, ray: &Ray<N>, max_toi: N, out: &mut Vec<&'a T>);
/// Collects every object which might contain a given point.
fn interferences_with_point<'a>(&'a self, point: &Point<N>, out: &mut Vec<&'a T>);
fn first_interference_with_ray<'a, 'b>(
&'a self,
ray: &'b Ray<N>,
max_toi: N,
cost_fn: &'a dyn Fn(T, &'b Ray<N>, N) -> Option<(T, RayIntersection<N>)>,
) -> Option<(T, RayIntersection<N>)>;
}