fix auto-attack targeting

src/pathfind.js

@@ -4,19 +4,26 @@ import PriorityQueue from './priority-queue.js'
 import SATX from './satx.js'
 
 export default class Pathfind {
-  static precision = 0.001
-  static multiplier = 1000 // (1 / this.precision)
+  static precision = 0.01
+  static multiplier = 1000000 // (1 / this.precision) * 10^expected_digit_count / 10
 
   static key2(a, b) {
     return `${a},${b}`
   }
 
-  // TODO: Value exceeds safe integer limit: collisions cause waypointing anomalies
+  // Fowler-Noll-Vo hash prime and offset basis for small keyspaces
   static floatKey4(a, b, c, d) {
-    return Math.floor(a * Pathfind.multiplier) +
-      Math.floor(b * Pathfind.multiplier) * Pathfind.multiplier +
-      Math.floor(c * Pathfind.multiplier) * Pathfind.multiplier ** 2 +
-      Math.floor(d * Pathfind.multiplier) * Pathfind.multiplier ** 3
+    const prime = 16777619
+    let result = 2166136261
+    result ^= Math.floor(a * Pathfind.multiplier)
+    result *= prime
+    result ^= Math.floor(b * Pathfind.multiplier)
+    result *= prime
+    result ^= Math.floor(c * Pathfind.multiplier)
+    result *= prime
+    result ^= Math.floor(d * Pathfind.multiplier)
+    result *= prime
+    return result
   }
 
   static uniqueWaypoints(waypoints) {