Editor Gizmos + horizontal min max linerenderer sampler

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       value: 1
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       value: 0
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-    - target: {fileID: 7523567070824087546, guid: c309e2ab8a7e17f049cee02d2d5e1af3,
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         type: 3}
       propertyPath: m_LocalRotation.z
       value: 0
       objectReference: {fileID: 0}
-    - target: {fileID: 7523567070824087546, guid: c309e2ab8a7e17f049cee02d2d5e1af3,
+    - target: {fileID: 6499929602381336473, guid: 9415cb10a1bd579269301ca4f61a1554,
         type: 3}
       propertyPath: m_LocalEulerAnglesHint.x
       value: 0
       objectReference: {fileID: 0}
-    - target: {fileID: 7523567070824087546, guid: c309e2ab8a7e17f049cee02d2d5e1af3,
+    - target: {fileID: 6499929602381336473, guid: 9415cb10a1bd579269301ca4f61a1554,
         type: 3}
       propertyPath: m_LocalEulerAnglesHint.y
       value: 0
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-    - target: {fileID: 7523567070824087546, guid: c309e2ab8a7e17f049cee02d2d5e1af3,
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         type: 3}
       propertyPath: m_LocalEulerAnglesHint.z
       value: 0
@@ -494,7 +504,7 @@ PrefabInstance:
     m_RemovedGameObjects: []
     m_AddedGameObjects: []
     m_AddedComponents: []
-  m_SourcePrefab: {fileID: 100100000, guid: c309e2ab8a7e17f049cee02d2d5e1af3, type: 3}
+  m_SourcePrefab: {fileID: 100100000, guid: 9415cb10a1bd579269301ca4f61a1554, type: 3}
 --- !u!1660057539 &9223372036854775807
 SceneRoots:
   m_ObjectHideFlags: 0
@@ -502,4 +512,4 @@ SceneRoots:
   - {fileID: 330585546}
   - {fileID: 410087041}
   - {fileID: 832575519}
-  - {fileID: 8564517829232091348}
+  - {fileID: 891862850}

Assets/Scripts/Tower/ProjectileTower.cs

@@ -0,0 +1,18 @@
+using UnityEngine;
+using UnityEngine.Assertions;
+
+[RequireComponent(typeof(ProjectileSpawner))]
+public class ProjectileTower : Tower
+{
+    [SerializeField] private ProjectilePattern[] projectileSequence;
+
+    private ProjectileSpawner projectileSpawner;
+
+    protected override void Awake()
+    {
+        base.Awake();
+
+        projectileSpawner = GetComponent<ProjectileSpawner>();
+        Assert.IsNotNull(projectileSpawner);
+    }
+}

Assets/Scripts/Tower/ProjectileTower.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 3c6fb039e74d12a7bbfde22591bc7eee
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/Scripts/Tower/Tower.cs

@@ -4,21 +4,22 @@ using UnityEngine.Assertions;
 [RequireComponent(typeof(HealthComponent))]
 public abstract class Tower : MonoBehaviour
 {
-    [SerializeField] private Vector2 horizontalRotationMinMax;
+    [SerializeField] private EditableArc horizontalArc;
-    [SerializeField] private Vector2 verticalRotationMinMax;
+    [SerializeField] private EditableArc verticalArc;
-
-    [SerializeField] private float horizontalRotation;
-    [SerializeField] private float verticalRotation;
 
     private HealthComponent healthComp;
 
-    private void Awake()
+    // Getters
+    public Vector2 HorizontalRotationMinMax => horizontalArc.RotationMinMax;
+    public Vector2 VerticalRotationMinMax => verticalArc.RotationMinMax;
+    public float HorizontalRotation => horizontalArc.Value;
+    public float VerticalRotation => verticalArc.Value;
+
+    protected virtual void Awake()
     {
         healthComp = GetComponent<HealthComponent>();
         Assert.IsNotNull(healthComp);
 
         // Set default rotation to average between min max
-        horizontalRotation = (horizontalRotationMinMax.x + horizontalRotationMinMax.y) / 2f;
-        verticalRotation = (verticalRotationMinMax.x + verticalRotationMinMax.y) / 2f;
     }
 }

Assets/Scripts/Tower/TowerEditor.cs

@@ -0,0 +1,30 @@
+#if UNITY_EDITOR
+using UnityEngine;
+using UnityEditor;
+
+[CustomEditor(typeof(ProjectileSpawner))]
+public class TowerEditor : Editor
+{
+    private float arcDist = 1f;
+
+    public void OnSceneGUI()
+    {
+        var tower = (serializedObject.targetObject as Component).gameObject.GetComponent<Tower>();
+
+        // Draw horizontal angle
+        Handles.color = Color.red;
+        float angleX = tower.HorizontalRotationMinMax.y - tower.HorizontalRotationMinMax.x;
+        float vX = (Mathf.PI - tower.HorizontalRotation * Mathf.Deg2Rad) / 2f;
+        Vector3 fromX = Quaternion.AngleAxis(tower.HorizontalRotationMinMax.x, tower.transform.up) * tower.transform.right;
+        Handles.DrawWireArc(tower.transform.position, tower.transform.up, fromX, angleX, arcDist, 5);
+
+        // Draw vertical angle
+        Handles.color = Color.green;
+        float angleY = tower.VerticalRotationMinMax.y - tower.VerticalRotationMinMax.x;
+        float vY = (Mathf.PI - tower.VerticalRotation * Mathf.Deg2Rad) / 2f;
+        Vector3 fromY = Quaternion.AngleAxis(tower.VerticalRotationMinMax.x, tower.transform.right) * tower.transform.up;
+        Handles.DrawWireArc(tower.transform.position, tower.transform.right, fromY, angleY, arcDist, 5);
+    }
+}
+
+#endif

Assets/Scripts/Tower/TowerEditor.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 0e79d278213d1e8b0b8cf1ef67884018
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
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+  assetBundleVariant: 

Assets/Scripts/Utilities/EditableArc.cs

@@ -0,0 +1,67 @@
+using UnityEngine;
+
+[RequireComponent(typeof(LineRenderer))]
+public class EditableArc : MonoBehaviour
+{
+    [SerializeField, Range(5, 50)] private int samples = 15;
+    [SerializeField] private float visualRadius = 1f;
+
+    [SerializeField] private Vector2 rotationMinMax = new Vector2(-30f, 30f);
+    private LineRenderer lineRenderer;
+
+    public Observer<float> Value { get; private set; } = new(0);
+    public Vector2 RotationMinMax => rotationMinMax;
+
+    private void Awake()
+    {
+        lineRenderer = GetComponent<LineRenderer>();
+
+        Value.AddListener(UpdateArc);
+
+        Value.Value = (rotationMinMax.x + rotationMinMax.y) / 2f;
+    }
+
+    private void Update()
+    {
+        UpdateArc(Value.Value);
+    }
+
+    private void UpdateArc(float rotation)
+    {
+        float angle = rotationMinMax.y - rotationMinMax.x;
+        float v = (Mathf.PI - Value * Mathf.Deg2Rad) / 2f;
+        Vector3 start = Quaternion.AngleAxis(rotationMinMax.x, transform.up) * transform.right;
+        Vector3 end = Quaternion.AngleAxis(rotationMinMax.y, transform.up) * transform.right;
+
+        // Sample LineRenderer points
+        lineRenderer.positionCount = samples + 1;
+        Vector3[] positions = new Vector3[samples + 1];
+        float stepSize = 1f / samples;
+        float t = 0;
+        for (int i = 0; i <= samples; i++)
+        {
+            positions[i] = SamplePointOnArc(start, end, visualRadius, t);
+            // Debug.Log($"t: = {t}, pos: {positions[i]}");
+            t += stepSize;
+        }
+
+        lineRenderer.SetPositions(positions);
+    }
+
+    public Vector3 SamplePointOnArc(Vector3 startPoint, Vector3 endPoint, float radius, float t)
+    {
+        // Calculate the angle between start and end points
+        float angle = Vector3.Angle(startPoint, endPoint) * t;
+
+        // Calculate the perpendicular vector from start to end
+        Vector3 axis = Vector3.Cross(startPoint, endPoint).normalized;
+
+        // Calculate the position of the point on the arc
+        Vector3 pointOnArc = Quaternion.AngleAxis(angle, axis) * startPoint;
+
+        // Scale the point by the radius
+        pointOnArc *= radius;
+
+        return pointOnArc;
+    }
+}

Assets/Scripts/Utilities/EditableArc.cs.meta

@@ -0,0 +1,11 @@
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+guid: 907145a413a8aab36826e850743ffdcc
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Assets/Scripts/Utilities/Observer.cs

@@ -0,0 +1,78 @@
+using System;
+using System.Reflection;
+using UnityEngine;
+using UnityEngine.Events;
+
+#if UNITY_EDITOR
+using UnityEditor.Events;
+#endif
+
+[Serializable]
+public class Observer<T> {
+    [SerializeField] T value;
+    [SerializeField] UnityEvent<T> onValueChanged;
+
+    public T Value {
+        get => value;
+        set => Set(value);
+    }
+
+    public static implicit operator T(Observer<T> observer) => observer.value;
+
+    public Observer(T value, UnityAction<T> callback = null) {
+        this.value = value;
+        onValueChanged = new UnityEvent<T>();
+        if (callback != null) onValueChanged.AddListener(callback);
+    }
+
+    public void Set(T value) {
+        if (Equals(this.value, value)) return;
+        this.value = value;
+        Invoke();
+    }
+
+    public void Invoke() {
+        Debug.Log($"Invoking {onValueChanged.GetPersistentEventCount()} listeners");
+        onValueChanged.Invoke(value);
+    }
+
+    public void AddListener(UnityAction<T> callback) {
+        if (callback == null) return;
+        if (onValueChanged == null) onValueChanged = new UnityEvent<T>();
+
+#if UNITY_EDITOR
+        UnityEventTools.AddPersistentListener(onValueChanged, callback);
+#else
+        onValueChanged.AddListener(callback);
+#endif
+    }
+
+    public void RemoveListener(UnityAction<T> callback) {
+        if (callback == null) return;
+        if (onValueChanged == null) return;
+
+#if UNITY_EDITOR
+        UnityEventTools.RemovePersistentListener(onValueChanged, callback);
+#else
+        onValueChanged.RemoveListener(callback);
+#endif
+    }
+
+    public void RemoveAllListeners() {
+        if (onValueChanged == null) return;
+
+#if UNITY_EDITOR
+        FieldInfo fieldInfo = typeof(UnityEventBase).GetField("m_PersistentCalls", BindingFlags.Instance | BindingFlags.NonPublic);
+        object value = fieldInfo.GetValue(onValueChanged);
+        value.GetType().GetMethod("Clear").Invoke(value, null);
+#else
+        onValueChanged.RemoveAllListeners();
+#endif
+    }
+
+    public void Dispose() {
+        RemoveAllListeners();
+        onValueChanged = null;
+        value = default;
+    }
+}

Assets/Scripts/Utilities/Observer.cs.meta

@@ -0,0 +1,11 @@
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Assets/Scripts/Utilities/ProjectileSpawner.cs

@@ -0,0 +1,64 @@
+using System.Collections;
+using UnityEngine;
+
+[System.Serializable]
+public class ProjectilePattern
+{
+    [SerializeField]
+    public float Arc = 15;
+    [SerializeField]
+    public int Amount = 3;
+    [SerializeField]
+    public float Speed = 1;
+    [SerializeField]
+    public GameObject bulletPrefab;
+
+    [SerializeField]
+    public bool Burst = true;
+    [SerializeField]
+    public float BurstDelay = 0.1f;
+}
+
+public class ProjectileSpawner : MonoBehaviour
+{
+    [SerializeField] private float delayBetweenBulletSequences = 0.1f;
+
+    public void RunBulletSequence(Vector3 origin, Vector3 baseDirection, ProjectilePattern[] bulletSequence)
+    {
+        StartCoroutine(RunBulletSequenceCourotine(origin, baseDirection, bulletSequence));
+    }
+
+    private IEnumerator RunBulletSequenceCourotine(Vector3 origin, Vector3 baseDirection, ProjectilePattern[] bulletSequence)
+    {
+        baseDirection.Normalize();
+
+        foreach (ProjectilePattern bulletPattern in bulletSequence)
+        {
+            float stepSize = bulletPattern.Arc / ((float)bulletPattern.Amount);
+            for (int i = 0; i < bulletPattern.Amount; i++)
+            {
+                Vector2 bulletDir = rotate(baseDirection, stepSize * i + stepSize / 2f - bulletPattern.Arc / 2f);
+
+                GameObject projectile = Instantiate(bulletPattern.bulletPrefab, origin, Quaternion.identity);
+                Debug.DrawRay(origin, bulletDir, Color.magenta, 5f);
+
+                projectile.transform.up = bulletDir;
+                projectile.GetComponent<Rigidbody2D>().AddForce(bulletDir * bulletPattern.Speed);
+
+                if (bulletPattern.Burst)
+                    yield return new WaitForSeconds(bulletPattern.BurstDelay);
+            }
+            yield return new WaitForSeconds(delayBetweenBulletSequences);
+        }
+    }
+
+    public static Vector2 rotate(Vector2 v, float deg)
+    {
+        float delta = deg * (float)Mathf.Deg2Rad;
+        return new Vector2(
+            v.x * Mathf.Cos(delta) - v.y * Mathf.Sin(delta),
+            v.x * Mathf.Sin(delta) + v.y * Mathf.Cos(delta)
+        );
+    }
+}
+

Assets/Scripts/Utilities/ProjectileSpawner.cs.meta

@@ -0,0 +1,11 @@
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ProjectSettings/EditorBuildSettings.asset

@@ -6,6 +6,6 @@ EditorBuildSettings:
   serializedVersion: 2
   m_Scenes:
   - enabled: 1
-    path: Assets/Scenes/SampleScene.unity
+    path: Assets/Scenes/TowerTest.unity
     guid: 99c9720ab356a0642a771bea13969a05
   m_configObjects: {}