use DestroyImmediate to fix pause Boid FOV edits creating duplicate LineRenderers, fix arc calculations and rotate correctly, FOV arc finally 'fixed' properly (again), fix XML docs/comments

Boids/Assets/Scripts/Boid.cs

@@ -231,7 +231,7 @@ public class Boid : MonoBehaviour {
         
         // Destroy Line Renderers (and child GameObjects)
         foreach (Transform child in transform)
-            Destroy(child.gameObject);
+            DestroyImmediate(child.gameObject);
         Array.Clear(_lineRenderers, 0, _lineRenderers.Length);
     }
 
@@ -265,7 +265,7 @@ public class Boid : MonoBehaviour {
         if (_parent.enableFOVChecks) {
             // Set FOV Arc rotation to mimic Boid transform rotation
             _lineRenderers[2].transform.rotation = transform.rotation;
-            _lineRenderers[2].transform.Rotate(0, 0, _parent.boidFOV / 2f + 180);
+            _lineRenderers[2].transform.Rotate(0, 0, _parent.boidFOV / 2f);
         }
     }
 }

Boids/Assets/Scripts/ShapeDraw.cs

@@ -3,7 +3,7 @@
 /// <summary>
 /// A simple static utility class that assists with drawing shapes using the <c>LineRenderer</c> class.
 /// </summary>
-public class ShapeDraw {
+public static class ShapeDraw {
     public static float CircleWidth = 1f;
     public static float ArcWidth = 1f;
     public static int CircleVertexCount = 360;
@@ -12,12 +12,12 @@ public class ShapeDraw {
     
     /// <summary>
     /// Draw a Arc aimed straight up with a certain angle width and radius.
-    /// Use <see cref="RotateLineRenderer"/> to point the Arc at a certain direction.
+    /// This Arc is not direct at any specific angle and start from 0 degrees and ends at <c>angle</c> degrees.
+    /// You should rotate the <c>LineRenderer</c> to direct it at a specific point.
     /// </summary>
     /// <param name="lineRenderer">The LineRenderer to draw the Arc upon.</param>
-    /// <param name="angle">Angle of the Arc</param>
+    /// <param name="angle">Angle (width) of the Arc</param>
     /// <param name="radius">Radius of the Arc</param>
-    /// <seealso cref="RotateLineRenderer"/>
     public static void DrawArc(LineRenderer lineRenderer, float angle, float radius) {
         // Setup LineRenderer properties
         lineRenderer.useWorldSpace = false;
@@ -29,9 +29,9 @@ public class ShapeDraw {
         var pointCount = ArcVertexCount + 1;
         var points = new Vector3[pointCount + 2];
         
+        // Generate all points
         for (int i = 0; i < pointCount; i++) {
-            // Magic '180 - angle'
-            var rad = Mathf.Deg2Rad * Mathf.LerpAngle(0, angle, i / (float) pointCount);
+            var rad = Mathf.Deg2Rad * Mathf.Lerp(0, angle, (float) i / pointCount);
             points[i + 1] = new Vector3(Mathf.Sin(rad), Mathf.Cos(rad), 0) * radius;
         }
 
@@ -45,7 +45,8 @@ public class ShapeDraw {
     /// <summary>
     /// Draw a Circle with a specific radius and number of vertexes (detail level)
     /// </summary>
-    /// <param name="lineRenderer"></param>
+    /// <param name="lineRenderer">The LineRenderer to draw the Circle upon</param>
+    /// <param name="radius">Radius of the Circle</param>
     public static void DrawCircle(LineRenderer lineRenderer, float radius) {
         // Setup LineRenderer properties
         lineRenderer.useWorldSpace = false;
@@ -64,12 +65,4 @@ public class ShapeDraw {
         // Add points to LineRenderer
         lineRenderer.SetPositions(points);
     }
-
-    /// <summary>
-    /// 
-    /// </summary>
-    /// <param name="lineRenderer"></param>
-    public static void RotateLineRenderer(LineRenderer lineRenderer) {
-        
-    }
 }