projectile bounce

Assets/Materials/WallMat.physicMaterial

@@ -0,0 +1,14 @@
+%YAML 1.1
+%TAG !u! tag:unity3d.com,2011:
+--- !u!134 &13400000
+PhysicMaterial:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_Name: WallMat
+  dynamicFriction: 0
+  staticFriction: 0
+  bounciness: 1
+  frictionCombine: 1
+  bounceCombine: 1

Assets/Materials/WallMat.physicMaterial.meta

@@ -0,0 +1,8 @@
+fileFormatVersion: 2
+guid: db65845c02126636d9fae11e1ea2f004
+NativeFormatImporter:
+  externalObjects: {}
+  mainObjectFileID: 13400000
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/Prefabs/Projectiles/Bullet.prefab

@@ -146,6 +146,7 @@ MonoBehaviour:
   m_Script: {fileID: 11500000, guid: a98521a4b559621438fc196adc605f3b, type: 3}
   m_Name: 
   m_EditorClassIdentifier: 
-  bounciness: 0.516
+  bounciness: 1
   damage: 10
   wallRebounces: 4
+  comingFrom: {fileID: 0}

Assets/Scenes/TowerTest.unity

@@ -335,7 +335,7 @@ BoxCollider:
   m_PrefabInstance: {fileID: 0}
   m_PrefabAsset: {fileID: 0}
   m_GameObject: {fileID: 643774939}
-  m_Material: {fileID: 0}
+  m_Material: {fileID: 13400000, guid: db65845c02126636d9fae11e1ea2f004, type: 2}
   m_IncludeLayers:
     serializedVersion: 2
     m_Bits: 0
@@ -440,7 +440,7 @@ BoxCollider:
   m_PrefabInstance: {fileID: 0}
   m_PrefabAsset: {fileID: 0}
   m_GameObject: {fileID: 769011490}
-  m_Material: {fileID: 0}
+  m_Material: {fileID: 13400000, guid: db65845c02126636d9fae11e1ea2f004, type: 2}
   m_IncludeLayers:
     serializedVersion: 2
     m_Bits: 0
@@ -745,7 +745,7 @@ BoxCollider:
   m_PrefabInstance: {fileID: 0}
   m_PrefabAsset: {fileID: 0}
   m_GameObject: {fileID: 1085503232}
-  m_Material: {fileID: 0}
+  m_Material: {fileID: 13400000, guid: db65845c02126636d9fae11e1ea2f004, type: 2}
   m_IncludeLayers:
     serializedVersion: 2
     m_Bits: 0
@@ -850,7 +850,7 @@ BoxCollider:
   m_PrefabInstance: {fileID: 0}
   m_PrefabAsset: {fileID: 0}
   m_GameObject: {fileID: 1197417724}
-  m_Material: {fileID: 0}
+  m_Material: {fileID: 13400000, guid: db65845c02126636d9fae11e1ea2f004, type: 2}
   m_IncludeLayers:
     serializedVersion: 2
     m_Bits: 0
@@ -955,7 +955,7 @@ BoxCollider:
   m_PrefabInstance: {fileID: 0}
   m_PrefabAsset: {fileID: 0}
   m_GameObject: {fileID: 1621186629}
-  m_Material: {fileID: 0}
+  m_Material: {fileID: 13400000, guid: db65845c02126636d9fae11e1ea2f004, type: 2}
   m_IncludeLayers:
     serializedVersion: 2
     m_Bits: 0
@@ -1243,7 +1243,7 @@ PrefabInstance:
     - target: {fileID: 7348612162646443967, guid: fd9f9b61c0ebb324ebc9f929e26706bc,
         type: 3}
       propertyPath: m_LocalRotation.w
-      value: -0.13805284
+      value: -0.1380528
       objectReference: {fileID: 0}
     - target: {fileID: 7348612162646443967, guid: fd9f9b61c0ebb324ebc9f929e26706bc,
         type: 3}
@@ -1258,7 +1258,7 @@ PrefabInstance:
     - target: {fileID: 7348612162646443967, guid: fd9f9b61c0ebb324ebc9f929e26706bc,
         type: 3}
       propertyPath: m_LocalRotation.z
-      value: -0.13815573
+      value: -0.13815574
       objectReference: {fileID: 0}
     - target: {fileID: 8882344377078016156, guid: fd9f9b61c0ebb324ebc9f929e26706bc,
         type: 3}
@@ -1341,7 +1341,7 @@ BoxCollider:
   m_PrefabInstance: {fileID: 0}
   m_PrefabAsset: {fileID: 0}
   m_GameObject: {fileID: 1797347348}
-  m_Material: {fileID: 0}
+  m_Material: {fileID: 13400000, guid: db65845c02126636d9fae11e1ea2f004, type: 2}
   m_IncludeLayers:
     serializedVersion: 2
     m_Bits: 0

Assets/Scripts/Tower/Projectile.cs

@@ -8,6 +8,7 @@ public class Projectile : MonoBehaviour
     private float bounciness = 0.5f;
 
     private Collider projCol;
+    private Rigidbody body;
 
     [SerializeField, Range(0, 50)]
     private int damage = 10;
@@ -15,20 +16,32 @@ public class Projectile : MonoBehaviour
     [SerializeField]
     private int wallRebounces = 4;
     private int hitWalls = 0;
-    
+
     public HealthComponent comingFrom;
 
+    private Vector3 prevVel;
+
     private void Awake()
     {
         projCol = GetComponent<Collider>();
+        body = GetComponent<Rigidbody>();
         Assert.IsNotNull(projCol);
 
         PhysicMaterial pMat = new();
         pMat.bounciness = this.bounciness;
+        pMat.staticFriction = 0f;
+        pMat.dynamicFriction = 0f;
+        pMat.frictionCombine = PhysicMaterialCombine.Minimum;
+        pMat.bounceCombine = PhysicMaterialCombine.Minimum;
 
         projCol.material = pMat;
     }
 
+    private void LateUpdate()
+    {
+        prevVel = body.velocity;
+    }
+
     private void OnCollisionEnter(Collision collision)
     {
         HealthComponent hitHealthComp = collision.gameObject.GetComponent<HealthComponent>();
@@ -44,6 +57,8 @@ public class Projectile : MonoBehaviour
             {
                 Destroy(gameObject);
             }
+            Vector3 newVel = Vector3.Reflect(prevVel.normalized, collision.contacts[0].normal.normalized);
+            body.velocity = newVel.normalized * prevVel.magnitude * bounciness;
         }
     }
 }