Major work with new Boid prefrab, configuring rules and attempt at camera wrapping - getting close to working prototype

Assets/Boid.cs

@@ -1,50 +1,119 @@
 using System.Collections.Generic;
 using UnityEngine;
+using UnityEngine.Analytics;
 
 // Boids are represented by a moving, rotating triangle.
 // Boids should communicate with sibling Boids
 public class Boid : MonoBehaviour {
-    public Vector2 velocity = Vector2.zero;
+    public Vector2 position = Vector2.zero;
+    public Vector2 velocity;
+    private Renderer[] _renderers;
+    bool _isWrappingX = false;
+    bool _isWrappingY = false;
+    Camera _cam;
+    Vector3 _viewportPosition;
 
     void Start() {
-        velocity = Vector2.one;
+        velocity = new Vector2(0.03f * Random.value < 0.5 ? 1 : -1, 0.03f * Random.value < 0.5 ? 1 : -1);
+        _renderers = GetComponents<Renderer>();
+        _cam = Camera.main;
+        _viewportPosition = _cam.WorldToViewportPoint(transform.position);
+    }
+
+    void Update() {
+        // Updates the rotation of the object based on the Velocity
+        transform.rotation = Quaternion.Euler(0, 0, Mathf.Rad2Deg * -Mathf.Atan2(velocity.x, velocity.y));
+        ScreenWrap();
+    }
+
+    bool CheckRenderers() {
+        foreach (var renderer in _renderers) {
+            // If at least one render is visible, return true
+            if (renderer.isVisible) {
+                return true;
+            }
+        }
+
+        // Otherwise, the object is invisible
+        return false;
+    }
+
+    void ScreenWrap() {
+        var isVisible = CheckRenderers();
+
+        if (isVisible) {
+            _isWrappingX = false;
+            _isWrappingY = false;
+            return;
+        }
+
+        if (_isWrappingX && _isWrappingY) {
+            return;
+        }
+        var newPosition = transform.position;
+
+        if (!_isWrappingX && (_viewportPosition.x > 1 || _viewportPosition.x < 0)) {
+            newPosition.x = -newPosition.x;
+            _isWrappingX = true;
+        }
+
+        if (!_isWrappingY && (_viewportPosition.y > 1 || _viewportPosition.y < 0)) {
+            newPosition.y = -newPosition.y;
+            _isWrappingY = true;
+        }
+
+        transform.position = newPosition;
     }
 
-    // Returns the next position the Boid will be moving to
     public Vector2 NextPosition(List<Boid> boids, float[] magnitudes) {
-        // Find the local flock
+        // Acquires all
-        List<Boid> flock = GetFlock(boids, 5);
+        List<Boid> flock = GetFlock(boids, 20);
 
-        // Calculate all offsets and multiple by magnitudes given
+        if (flock.Count > 0) {
-        Vector2 r1 = Rule1(flock) * magnitudes[0];
+            // Calculate all offsets and multiple by magnitudes given
-        Vector2 r2 = Rule2(flock) * magnitudes[1];
+            Vector2 r1 = Rule1(flock) * magnitudes[0];
-        Vector2 r3 = Rule3(flock) * magnitudes[2];
+            Vector2 r2 = Rule2(flock) * magnitudes[1];
+            Vector2 r3 = Rule3(flock) * magnitudes[2];
+            velocity += r1 + r2 + r3;
+        }
 
-        return transform.position + (Vector3) (r1 + r2 + r3);
+        LimitVelocity();
+
+        return position + velocity;
+    }
+
+    void LimitVelocity() {
+        if (velocity.magnitude > 2f) {
+            velocity = (velocity / velocity.magnitude) * 2f;
+        }
     }
 
     // Cohesion: Steer towards center of mass of flock
     Vector2 Rule1(List<Boid> flock) {
         Vector2 center = Vector2.zero;
         foreach (Boid boid in flock)
-            center += (Vector2) boid.transform.position;
+            center += boid.position;
         center /= flock.Count;
-        return (center - (Vector2) transform.position) / 100;
+        return (center - this.position) / 100;
     }
 
     // Separation: Steer to avoid other Boids within flock
     Vector2 Rule2(List<Boid> flock) {
         Vector2 c = Vector2.zero;
         foreach (Boid boid in flock) {
-            Vector2 diff = boid.transform.position - transform.position;
+            Vector2 diff = boid.position - this.position;
             if (diff.magnitude < 5)
                 c -= diff;
         }
+
         return c;
     }
 
     // Alignment: Steer to align with the average heading of the flock
     Vector3 Rule3(List<Boid> flock) {
+        if (flock.Count == 0)
+            return Vector2.zero;
+
         Vector2 perceived = Vector2.zero;
         foreach (Boid boid in flock)
             perceived += boid.velocity;
@@ -55,8 +124,8 @@ public class Boid : MonoBehaviour {
     // Returns a list of boids within a certain radius of the Boid, representing it's local 'flock'
     List<Boid> GetFlock(List<Boid> boids, float radius) {
         List<Boid> flock = new List<Boid>();
-        foreach(Boid boid in boids)
+        foreach (Boid boid in boids)
-            if(boid != this && Vector2.Distance(transform.position, boid.transform.position) <= radius)
+            if (boid != this && Vector2.Distance(this.position, boid.position) <= radius)
                 flock.Add(boid);
         return flock;
     }

Assets/Boid.prefab

@@ -0,0 +1,61 @@
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Assets/Boid.prefab.meta

@@ -0,0 +1,7 @@
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Assets/BoidController.cs

@@ -1,13 +1,13 @@
-using System.Collections;
+using System.Collections.Generic;
-using System.Collections.Generic;
 using UnityEngine;
+using Random = UnityEngine.Random;
 
 public class BoidController : MonoBehaviour {
     // Controller Attributes
-    public Rect space;
+    public Rect space = new Rect(new Vector2(0, 0), new Vector2(24000, 14000));
 
     // Swarm Attributes
-    public int boidCount = 1000;
+    public int boidCount = 50;
     public float boidGroupRange = 1.0f;
 
     // Bias changes how different rules influence individual Boids more or less
@@ -15,20 +15,37 @@ public class BoidController : MonoBehaviour {
     public float alignmentBias = 1.0f;
     public float cohesionBias = 1.0f;
 
-    private List<Boid> _boids = new List<Boid>();
+    public GameObject boidObject;
 
-    void Start() {
+    public List<Boid> boids = new List<Boid>();
-       for(int i = 0; i < boidCount; i++)
+
-           _boids.Add(new Boid(Vector2.zero, new Vector2(1, 1)));
+    private void OnDrawGizmos() {
+        Gizmos.DrawWireCube(space.center, space.size);
     }
 
-    void Update() {
+    void Start() {
-        float[] magnitudes = new float[] {cohesionBias, separationBias, alignmentBias};
+        for (int i = 0; i < boidCount; i++) {
-        // Update all Boid positions
+            var position = new Vector2(Random.Range(-15, 15), Random.Range(-15, 15));
-        foreach (Boid boid in _boids) {
+            var boid = Instantiate(boidObject, position, Quaternion.identity);
-            boid.SetPosition(boid.NextPosition(_boids, magnitudes));
+            
+            boid.transform.parent = transform;
+            boids.Add(boid.GetComponent<Boid>());
+            boids[boids.Count - 1].position = position;
         }
     }
 
+    void Update() {
+        // foreach (Boid boid in boids) {
+        //     if (!space.Contains(boid.position))
+        //         boid.position = transform.position;
+        // }
         
+        float[] magnitudes = {cohesionBias, separationBias, alignmentBias};
+        // Update all Boid positions
+        foreach (Boid boid in boids) {
+            Vector2 next = boid.NextPosition(boids, magnitudes);
+            boid.position = next;
+            boid.transform.position = new Vector3(next.x, next.y, 0);
+        }
+    }
 }

Packages/manifest.json

@@ -1,6 +1,5 @@
 {
   "dependencies": {
-    "com.akb.knn": "file:F:/Programming/Unity/KNN",
     "com.unity.ads": "2.0.8",
     "com.unity.analytics": "3.3.2",
     "com.unity.collab-proxy": "1.2.16",