Wormholes

Assets/Scenes/Game.unity

@@ -1027,7 +1027,7 @@ MonoBehaviour:
   - {fileID: 11400000, guid: 73dc3bbc93cba37b1b989a9497b680e7, type: 2}
   - {fileID: 11400000, guid: 3237b9257f669690ea1a6f828451509e, type: 2}
   - {fileID: 11400000, guid: c6de04aab82eeff81894387c19ac1310, type: 2}
-  wormholePrefab: {fileID: 0}
+  wormholePrefab: {fileID: 7486271855853268360, guid: bf48a6813e1f5a2f7a63fc5c413808cb, type: 3}
 --- !u!4 &2109945868
 Transform:
   m_ObjectHideFlags: 0

Assets/Scripts/Game/GameManager.cs

@@ -41,6 +41,8 @@ namespace Game {
 			while (Application.isPlaying) {
 				yield return new WaitForSeconds(1);
 				SpawnModification();
+				yield return new WaitForSeconds(2);
+				SpawnWormhole();
 			}
 		}
 
@@ -87,7 +89,10 @@ namespace Game {
 			Player2 = p2;
 		}
 
-		private void SpawnWormhole() { }
+		private void SpawnWormhole() {
+			var pos = new Vector2(Random.Range(0, Dimensions.Singleton.PlaySize.x) - Dimensions.Singleton.PlaySize.x / 2, Random.Range(-5, 5));
+			Instantiate(wormholePrefab, pos, Quaternion.identity);
+		}
 
 		private void SpawnModification() {
 			var pos = new Vector2(Random.Range(0, Dimensions.Singleton.PlaySize.x) - Dimensions.Singleton.PlaySize.x / 2, Random.Range(-2, 2));

Assets/Scripts/Game/Wormhole.cs

@@ -1,17 +1,72 @@
+using System.Collections;
+using System.Linq;
 using Unity.Netcode;
 using UnityEngine;
 
 namespace Game {
 	public class Wormhole : NetworkBehaviour {
 
-		public float Size { get; set; }
+		public float duration = 10;
 
-		private void Start() {
-			transform.localScale = new Vector3(Size, Size, Size);
+		private const float MaxSize = 10;
+
+		private float size;
+		public float Size {
+			get => size;
+			set {
+				size = value;
+				transform.localScale = new Vector3(size, size, 1);
+			}
+		}
+
+		private float Radius => Size / 2;
+		
+		private static float CubicEaseInOut(float t, float b, float c, float d) {
+			if ((t /= d / 2) < 1) return c / 2 * t * t * t + b;
+			return c / 2 * ((t -= 2) * t * t + 2) + b;
+		}
+		
+		private static float CircleEaseInOut(float t, float b, float c, float d) {
+			if ((t /= d / 2) < 1) return -c / 2 * (Mathf.Sqrt(1 - t * t) - 1) + b;
+			return c / 2 * (Mathf.Sqrt(1 - (t -= 2) * t) + 1) + b;
+		}
+
+		private IEnumerator Grow(float growTime) {
+			float currentTime = 0;
+			while (currentTime <= growTime) {
+				Size = CircleEaseInOut(currentTime, 0, MaxSize, growTime);
+				yield return new WaitForFixedUpdate();
+				currentTime += Time.fixedDeltaTime;
+			}
+		}
+
+		private IEnumerator Shrink(float shrinkTime) {
+			float currentTime = 0;
+			while (currentTime <= shrinkTime) {
+				Size = CubicEaseInOut(currentTime, MaxSize, -MaxSize, shrinkTime);
+				yield return new WaitForFixedUpdate();
+				currentTime += Time.fixedDeltaTime;
+			}
+		}
+
+		private IEnumerator Start() {
+			Size = 0;
+			yield return Grow(duration * 0.2f);
+			yield return new WaitForSeconds(duration * 0.7f);
+			yield return Shrink(duration * 0.1f);
 		}
 
 		private void FixedUpdate() {
-			foreach (var ball in GameManager.Singleton.Balls) { }
+			Vector2 thisPos = new Vector2(transform.position.x, transform.position.y);
+			foreach (var ball in GameManager.Singleton.Balls) {
+				Vector2 diff = thisPos - ball.Rb.position;
+				if (diff.sqrMagnitude > Radius * Radius)
+					continue;
+				float dist = diff.magnitude;
+				Vector2 force = diff.normalized / dist * (Size * 5);
+				force = Vector2.ClampMagnitude(force, 15);
+				ball.Rb.AddForce(force);
+			}
 		}
 	}
 }