Implementing grenade skill

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Assets/Prefabs/Grenade.prefab.meta

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Assets/Resources/Skills/GrenadeSkill.asset

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+  m_Name: GrenadeSkill
+  m_EditorClassIdentifier: 
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+  m_skillImage: {fileID: 21300000, guid: 4e522cf3a529ea94d846154ee98e05a8, type: 3}
+  m_skillRange: 5
+  cooltime: 5
+  explosionRadius: 3
+  explosionTime: 2
+  damage: 50
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Assets/Resources/Skills/HeadShot.asset

@@ -15,5 +15,6 @@ MonoBehaviour:
   m_tier: 0
   m_index: 0
   m_skillImage: {fileID: 21300000, guid: 4c85b737d44119f4f828910c3bd26659, type: 3}
+  m_skillRange: 10
   cooltime: 0
   damageTimes: 2

Assets/Scripts/Actors/PlayableCharacter.cs

@@ -32,6 +32,7 @@ public abstract class PlayableCharacter : Actor
 	[SerializeField]
 	private Skill[] m_skills = new Skill[4];
 	public Skill[] Skills { get { return m_skills; } }
+    public LineRenderer skillRangeRenderer;
 
 	protected override void Start()
 	{
@@ -143,6 +144,17 @@ public abstract class PlayableCharacter : Actor
 			m_skills[index].Aiming();
 	}
 
+    public void DrawSkillRange(float range)
+    {
+        skillRangeRenderer.enabled = true;
+        skillRangeRenderer.DrawCircle(transform.position, range);
+    }
+
+    public void DisableSkillRangeRenderer()
+    {
+        skillRangeRenderer.enabled = false;
+    }
+
 	protected abstract void DefaultControl();
 	protected abstract void AimingControl();
 }

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Assets/Scripts/ExplosionEffect.cs

+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+using UnityEngine.Experimental.Rendering.Universal;
+
+public class ExplosionEffect : MonoBehaviour
+{
+    [SerializeField]
+    private Light2D light;
+
+    private ParticleSystem particle;
+    private float lifeTime;
+    private float lifeTimer = 0;
+    private float startIntensity;
+    [SerializeField]
+    private AnimationCurve lightCurve;
+
+    private void Start()
+    {
+        particle = GetComponent<ParticleSystem>();
+        lifeTime = particle.main.startLifetime.constantMax;
+        startIntensity = light.intensity;
+    }
+    private void Update()
+    {
+        lifeTimer += Time.deltaTime / lifeTime;
+        light.intensity = Mathf.Lerp(startIntensity, 0, lifeTimer);
+    }
+}
\ No newline at end of file

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Assets/Scripts/Extensitons/LineRendererExtension.cs

+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+public static class LineRendererExtension
+{
+    public static void DrawCircle(this LineRenderer renderer, Vector3 center, float radius)
+    {
+        Vector3[] positions = new Vector3[361];
+        center.z = 0;
+        for (int i = 0; i < 360; i++)
+        {
+            positions[i] = center + Quaternion.Euler(0, 0, i) * Vector2.up * radius;
+        }
+        positions[360] = positions[0];
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+    }
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Assets/Scripts/Grenade.cs

+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+public class Grenade : MonoBehaviour
+{
+    [SerializeField]
+    AnimationCurve moveCurve;
+    [SerializeField]
+    AnimationCurve sizeCurve;
+
+    private Vector3 destination;
+    private float explosionTime = 2;
+    private float explosionTimer = 2;
+
+    private float explosionRadius = 3;
+
+    [SerializeField]
+    private ParticleSystem explosionParticle;
+
+    private Vector3 startPosition;
+
+    private TrailRenderer trail;
+    private float trailWidth;
+    public void Init(Vector3 destination, float explosionRadius, float explosionTime = 2)
+    {
+        this.destination = destination;
+        this.explosionRadius = explosionRadius;
+        this.explosionTime = explosionTimer = explosionTime;
+        startPosition = transform.position;
+        trail = GetComponent<TrailRenderer>();
+    }
+
+    private void Update()
+    {
+        transform.position = Vector2.Lerp(startPosition, destination, moveCurve.Evaluate((explosionTime - explosionTimer) / explosionTime));
+        transform.localScale = Vector3.one * sizeCurve.Evaluate((explosionTime - explosionTimer) / explosionTime);
+        //trail.widthCurve.keys[0].value = trailWidth * sizeCurve.Evaluate((explosionTime - explosionTimer) / explosionTime);
+        explosionTimer -= Time.deltaTime;
+        if (explosionTimer < 0)
+        {
+            Explode();
+        }
+    }
+
+    private void Explode()
+    {
+        Instantiate(explosionParticle, transform.position, Quaternion.identity).Play();
+        Destroy(gameObject);
+    }
+}

Assets/Scripts/Grenade.cs.meta

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Assets/Scripts/PlayerController.cs

@@ -59,7 +59,14 @@ public class PlayerController : SingletonBehaviour<PlayerController>
 				character.UseSkill(0);
 			}
 		}
-	}
+        if (Input.GetKeyDown(KeyCode.W))
+        {
+            foreach (var character in characters)
+            {
+                character.UseSkill(1);
+            }
+        }
+    }
 
 	public void MouseControl()
 	{

Assets/Scripts/Skills/GrenadeSkill.cs

+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+using UnityEditor;
+public class GrenadeSkill : Skill
+{
+    public float explosionRadius = 3f;
+    public float explosionTime = 2f;
+    public int damage = 50;
+    public GameObject grenadePrefab;
+    private LineRenderer explosionRangeRenderer;
+#if UNITY_EDITOR
+    [MenuItem("Skiils/Grenade")]
+    static void CreateAsset()
+    {
+        GrenadeSkill skill = CreateInstance<GrenadeSkill>();
+        AssetDatabase.CreateAsset(skill, "Assets/" + skill.GetType().Name + ".asset");
+    }
+#endif
+
+
+    public override void Aiming()
+    {
+        character.StartCoroutine(AimingRoutine());
+    }
+
+    private IEnumerator AimingRoutine()
+    {
+        explosionRangeRenderer = Instantiate(character.skillRangeRenderer);
+        while (true)
+        {
+            yield return new WaitForEndOfFrame();
+            character.DrawSkillRange(SkillRange);
+            explosionRangeRenderer.DrawCircle(Camera.main.ScreenToWorldPoint(Input.mousePosition), explosionRadius);
+            if (Input.GetMouseButton(0))
+            {
+                Use();
+                break;
+            }
+            
+        }
+        Destroy(explosionRangeRenderer.gameObject);
+    }
+
+    protected override void Use()
+    {
+        GameObject obj = Instantiate(grenadePrefab, character.transform.position, character.transform.rotation);
+        obj.GetComponent<Grenade>().Init(Camera.main.ScreenToWorldPoint(Input.mousePosition), explosionRadius,explosionTime);
+        character.DisableSkillRangeRenderer();
+    }
+}

Assets/Scripts/Skills/GrenadeSkill.cs.meta

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Assets/Scripts/Skills/Skill.cs

@@ -19,6 +19,10 @@ public abstract class Skill : ScriptableObject
 	private Sprite m_skillImage;
 	public Sprite SkillImage { get { return m_skillImage; } }
 
+    [SerializeField]
+    private float m_skillRange;
+    public float SkillRange { get { return m_skillRange; } }
+
 	[SerializeField]
 	private float cooltime;
 	protected float m_remainedCooltime = 0;
@@ -27,6 +31,7 @@ public abstract class Skill : ScriptableObject
 	public bool IsReady { get { return m_remainedCooltime <= 0; } }
 	public float CooltimeRatio { get { return m_remainedCooltime / cooltime; } }
 
+
 	public virtual void UpdateSkill(float deltaTime)
 	{
 		m_remainedCooltime = Mathf.Max(0, m_remainedCooltime - deltaTime);