From c764975c56f191db577aa65169c8b71fa2b2a5c6 Mon Sep 17 00:00:00 2001
From: metamuffin <metamuffin@disroot.org>
Date: Wed, 25 Sep 2024 00:31:56 +0200
Subject: begin actually implementing spatial index

---
 server/client-lib/src/spatial_index.rs | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

(limited to 'server/client-lib/src')

diff --git a/server/client-lib/src/spatial_index.rs b/server/client-lib/src/spatial_index.rs
index d4bd1776..3f0d5ad0 100644
--- a/server/client-lib/src/spatial_index.rs
+++ b/server/client-lib/src/spatial_index.rs
@@ -15,20 +15,30 @@
     along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
 */
-use hurrycurry_protocol::glam::Vec2;
+use hurrycurry_protocol::glam::{IVec2, Vec2};
 use std::{collections::HashMap, hash::Hash};
 
 // TODO stub implementation. please implement
 pub struct SpatialIndex<T> {
     entries: HashMap<T, Vec2>,
+    bins: HashMap<IVec2, Vec<T>>,
 }
 
 impl<T: Eq + Hash + Copy> SpatialIndex<T> {
     pub fn update_entry(&mut self, id: T, position: Vec2) {
         self.entries.insert(id, position);
+        let e = self.bins.entry(position.as_ivec2()).or_default();
+        if !e.contains(&id) {
+            e.push(id);
+        }
     }
     pub fn remove_entry(&mut self, id: T) {
-        self.entries.remove(&id);
+        if let Some(pos) = self.entries.remove(&id) {
+            self.bins
+                .entry(pos.as_ivec2())
+                .or_default()
+                .retain(|e| *e != id);
+        }
     }
     pub fn all(&self, mut cb: impl FnMut(T, Vec2)) {
         for (&e, &pos) in &self.entries {
@@ -36,6 +46,7 @@ impl<T: Eq + Hash + Copy> SpatialIndex<T> {
         }
     }
     pub fn query(&self, position: Vec2, radius: f32, mut cb: impl FnMut(T, Vec2)) {
+        // TODO query bins
         self.all(|pl, p| {
             if p.distance(position) < radius {
                 cb(pl, p)
@@ -47,6 +58,7 @@ impl<T> Default for SpatialIndex<T> {
     fn default() -> Self {
         Self {
             entries: Default::default(),
+            bins: Default::default(),
         }
     }
 }
-- 
cgit v1.2.3-70-g09d2