AdjustmentsHandler AddBoids useNearby check, move all rules into GetVelocity method to try pre simulating new boids (failed), Wrapping docs, buggy GetClosestBoid, new TimeScale slider!

Boids/Assets/Editor/BoidControllerEditor.cs

@@ -64,5 +64,7 @@ public class BoidControllerEditor : UnityEditor.Editor {
         // Inspector elements related to Boid Focusing have changed - redraw!
         if (redraw && controller.focusedBoid != null)
             controller.focusedBoid.Draw(true);
+
+        Time.timeScale = EditorGUILayout.Slider("Time Scale", Time.timeScale, 0.02f, 1f);
     }
 }

Boids/Assets/Scripts/AdjustmentsHandler.cs

@@ -81,7 +81,7 @@ public class AdjustmentsHandler : MonoBehaviour {
                 // Calculate diff, formally add/remove boids
                 int diff = controller.boidCount - controller.boids.Count;
                 if(diff > 0)
-                    controller.AddBoids(diff);
+                    controller.AddBoids(diff, controller.boidCount > 5);
                 else if(diff < 0)
                     controller.RemoveBoids(diff * -1);
                 

Boids/Assets/Scripts/Boid.cs

@@ -1,4 +1,5 @@
 using System.Collections.Generic;
+using System.Linq;
 using UnityEngine;
 
 public class Boid : MonoBehaviour {
@@ -24,8 +25,7 @@ public class Boid : MonoBehaviour {
     private void Start() {
         _parent = transform.parent
             .GetComponent<BoidController>(); // Parent used to perform physics math without caching
-        velocity = Util.GetRandomVelocity(Random.Range(_parent.minSpeed,
-            _parent.maxSpeed)); // Acquire a Velocity Vector with a magnitude
+        velocity = Util.GetRandomVelocity(Random.Range(_parent.minSpeed, _parent.maxSpeed));
         _position = transform.position; // Track 2D position separately
         transform.name = $"Boid {transform.GetSiblingIndex()}"; // Name the Game Object so Boids can be tracked somewhat
     }
@@ -41,45 +41,58 @@ public class Boid : MonoBehaviour {
             transform.position = _position;
         }
         else {
-            // Find local neighborhood flock
-            Vector2 acceleration = Vector2.zero;
-            List<Boid> flock = _parent.localFlocks ? GetFlock(_parent.boids, _parent.boidGroupRange) : _parent.boids;
-            latestNeighborhoodCount = flock.Count;
-
-            // Only update latest neighborhood when we need it for focused boid Gizmo draws
-            if (isFocused)
-                latestNeighborhood = flock;
-
-            // Calculate all offsets and multiple by magnitudes given
-            if (flock.Count > 0) {
-                if (_parent.enableCohesion)
-                    acceleration += SteerTowards(Rule1(flock)) * _parent.cohesionBias;
-                if (_parent.enableSeparation)
-                    acceleration += SteerTowards(Rule2(flock)) * _parent.separationBias;
-                if (_parent.enableAlignment)
-                    acceleration += SteerTowards(Rule3(flock)) * _parent.alignmentBias;
-            }
-
-            if (_parent.enableBoundary && !_parent.Boundary.Contains(_position)) {
-                acceleration += SteerTowards(RuleBound()) * _parent.boundaryBias;
-            }
-
-            // Limit the Velocity Vector to a certain Magnitude
-            velocity += acceleration * Time.deltaTime;
-            float speed = velocity.magnitude;
-            Vector2 dir = velocity / speed;
-            speed = Mathf.Clamp(speed, _parent.minSpeed, _parent.maxSpeed);
-            velocity = dir * speed;
-
+            velocity = GetVelocity();
             _position += velocity * Time.deltaTime;
             transform.position = _position;
-            // transform.forward = dir;
         }
 
+        // Perform edge wrapping
         if (_parent.edgeWrapping)
             Wrapping();
     }
 
+    /// <summary>
+    /// Gets Velocity used to move Boid with all current rules and velocity
+    /// </summary>
+    /// <returns>new current Vector2 velocity</returns>
+    public Vector2 GetVelocity() {
+        // Find local neighborhood flock
+        Vector2 acceleration = Vector2.zero;
+        List<Boid> flock;
+
+        if (_parent.localFlocks)
+            flock = GetFlock(_parent.boids, _parent.boidGroupRange);
+        else
+            flock = _parent.boids;
+        
+        latestNeighborhoodCount = flock.Count;
+
+        // Only update latest neighborhood when we need it for focused boid Gizmo draws
+        if (isFocused)
+            latestNeighborhood = flock;
+
+        // Calculate all offsets and multiple by magnitudes given
+        if (flock.Count > 0) {
+            if (_parent.enableCohesion)
+                acceleration += SteerTowards(Rule1(flock)) * _parent.cohesionBias;
+            if (_parent.enableSeparation)
+                acceleration += SteerTowards(Rule2(flock)) * _parent.separationBias;
+            if (_parent.enableAlignment)
+                acceleration += SteerTowards(Rule3(flock)) * _parent.alignmentBias;
+        }
+
+        if (_parent.enableBoundary && !_parent.Boundary.Contains(_position)) {
+            acceleration += SteerTowards(RuleBound()) * _parent.boundaryBias;
+        }
+
+        // Limit the Velocity Vector to a certain Magnitude
+        Vector2 newVelocity = velocity +  acceleration * Time.deltaTime;
+        float speed = newVelocity.magnitude;
+        Vector2 dir = newVelocity / speed;
+        speed = Mathf.Clamp(speed, _parent.minSpeed, _parent.maxSpeed);
+        return dir * speed;
+    }
+
     /// <summary>
     /// Assists with clamping and normalizing a Vector2 force
     /// </summary>
@@ -90,6 +103,9 @@ public class Boid : MonoBehaviour {
         return Vector2.ClampMagnitude(v, _parent.maxSteerForce);
     }
 
+    /// <summary>
+    /// Runs edge wrapping logic for detecting and wrapping Boids
+    /// </summary>
     private void Wrapping() {
         if (!_parent.Space.Contains(_position)) {
             // Activate Wrap, Move
@@ -295,4 +311,26 @@ public class Boid : MonoBehaviour {
         return _position + Util.RotateBy(new Vector2(distance, distance),
             Random.Range(0f, 360f));
     }
+
+    public Boid GetClosestBoid() {
+        if (_parent.boids.Count <= 1)
+            return null;
+        
+        Boid best = _parent.boids[0];
+        float curDistSqr = Mathf.Infinity;
+        
+        foreach (Boid potential in _parent.boids) {
+            if (potential == this)
+                continue;
+            
+            Vector2 diff = potential._position - _position;
+            var diffSqrMag = diff.sqrMagnitude;
+            if (diffSqrMag < curDistSqr) {
+                curDistSqr = diffSqrMag;
+                best = potential;
+            }
+        }
+
+        return best;
+    }
 }

Boids/Assets/Scripts/BoidController.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Collections;
 using System.Collections.Generic;
 using UnityEditor;
 using UnityEngine;
@@ -82,6 +83,17 @@ public class BoidController : MonoBehaviour {
     private void Start() {
         SetupCamera();
         AddBoids(boidCount);
+
+        StartCoroutine(LateStart());
+    }
+
+    private IEnumerator LateStart() {
+        yield return new WaitForSecondsRealtime(0.5f);
+
+        for (int i = 0; i < 100; i++) {
+            foreach (Boid boid in boids)
+                boid.velocity = boid.GetVelocity();
+        }
     }
 
     /// <summary>
@@ -115,11 +127,13 @@ public class BoidController : MonoBehaviour {
         for (int i = 0; i < n; i++) {
             // Instantiate a Boid prefab within the boundaries randomly
             Vector2 position = useNearby ? RandomNearbyPosition() : RandomPosition() * 0.90f;
-            GameObject boid = Instantiate(boidObject, position, Quaternion.identity);
+            GameObject boidGO = Instantiate(boidObject, position, Quaternion.identity);
 
             // Set parent, add Boid component to Boids list
-            boid.transform.parent = transform;
-            boids.Add(boid.GetComponent<Boid>());
+            boidGO.transform.parent = transform;
+            var boid = boidGO.GetComponent<Boid>();
+            
+            boids.Add(boid);
         }
     }