add: pistol weapon and enemy

Assets/Scripts/BulletProjectile.cs

@@ -0,0 +1,30 @@
+using UnityEngine;
+
+public class BulletProjectile : MonoBehaviour
+{
+    public float speed = 1f;
+    public float damage = 20f;
+    public float timeToLive = 5f;
+
+    float currentTime = 0;
+
+    Rigidbody rb;
+
+    void Start() {
+        rb = GetComponent<Rigidbody>();
+        rb.linearVelocity = transform.forward * speed;
+    }
+
+    void Update() {
+        currentTime += Time.deltaTime;
+        if (currentTime >= timeToLive) Destroy(gameObject);
+    }
+
+    void OnTriggerEnter(Collider other) {
+        if (other.gameObject.CompareTag("Enemy")) {
+            Enemy enemy = other.GetComponent<Enemy>();
+            enemy.DealDamage(damage);
+        }
+        Destroy(gameObject);
+    }
+}

Assets/Scripts/BulletProjectile.cs.meta

@@ -0,0 +1,2 @@
+fileFormatVersion: 2
+guid: e7a451ad0b53e8c0ca82f7ce15114c38

Assets/Scripts/Enemy.cs

@@ -0,0 +1,12 @@
+using UnityEditor.Embree;
+using UnityEngine;
+
+public class Enemy : MonoBehaviour
+{
+    public float hp = 100f;
+
+    public void DealDamage(float damage) {
+        hp -= damage;
+        if (hp <= 0) Destroy(gameObject);
+    }
+}

Assets/Scripts/Enemy.cs.meta

@@ -0,0 +1,2 @@
+fileFormatVersion: 2
+guid: 46894d927b8e6654487b876457ca8974

Assets/Scripts/Pistol.cs

@@ -0,0 +1,21 @@
+using UnityEngine;
+
+public class Pistol : Weapon
+{
+    public GameObject projectilePrefab;
+    public Transform spawnPosition;
+    public float fireRate = 1f;
+
+    float currentDelay = 0;
+
+    public override void Shoot(bool keyDown, bool keyHold) {
+        if (keyDown && (fireRate == 0 || currentDelay == 1 / fireRate)) {
+            Instantiate(projectilePrefab, spawnPosition.position, transform.rotation);
+            currentDelay = 0;
+        }
+    }
+
+    void Update() {
+        if (fireRate != 0) currentDelay = Mathf.Clamp(currentDelay += Time.deltaTime, 0, 1 / fireRate);
+    }
+}

Assets/Scripts/Pistol.cs.meta

@@ -0,0 +1,2 @@
+fileFormatVersion: 2
+guid: 9b5e56940d7855caeb2d584265db0624

Assets/Scripts/Weapon.cs

@@ -0,0 +1,13 @@
+using UnityEngine;
+
+public abstract class Weapon : MonoBehaviour
+{
+    public bool isActive { get; private set; } = true;
+
+    public abstract void Shoot(bool keyDown, bool keyHold);
+
+    public void SetWeaponState(bool active) {
+        isActive = active;
+        GetComponent<MeshRenderer>().enabled = active;
+    }
+}

Assets/Scripts/Weapon.cs.meta

@@ -0,0 +1,2 @@
+fileFormatVersion: 2
+guid: 918a4cc8f96795ab080e3de45b90632c

Assets/Scripts/WeaponController.cs

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+using System.Collections.Generic;
+using UnityEngine;
+
+public class WeaponController : MonoBehaviour
+{
+    [SerializeField] Weapon[] weapons;
+    [SerializeField] int currentWeapon = 0;
+
+    void Start() {
+        weapons = GetComponentsInChildren<Weapon>();
+        for (int i = 0; i < weapons.Length; ++i) {
+            if (i != currentWeapon) weapons[i].SetWeaponState(false);
+        }
+    }
+
+    void Update() {
+        if (Input.GetMouseButton(0) && weapons[currentWeapon].isActive) weapons[currentWeapon].Shoot(Input.GetMouseButtonDown(0), Input.GetMouseButton(0));
+    }
+}

Assets/Scripts/WeaponController.cs.meta

@@ -0,0 +1,2 @@
+fileFormatVersion: 2
+guid: f3724861d6ef4a112910a3ef14207757