[Unity/유니티] 기초-3D 쿼터뷰 액션 게임: 수류탄 구현하기[B47]
개요
유니티 입문과 독학을 위해서 아래 링크의 골드메탈님의 영상들을 보며 진행 상황 사진 또는 캡처를 올리고 배웠던 점을 요약해서 적는다.
현재는 영상들을 보고 따라하고 배우는 것에 집중할 것이며, 영상을 모두 보고 따라한 후에는 개인 프로젝트를 설계하고 직접 만드는 것이 목표다.
https://youtube.com/playlist?list=PLO-mt5Iu5TeYI4dbYwWP8JqZMC9iuUIW2
유니티 강좌 기초 채널 Basic
유니티 개발을 처음 시작하시는 입문자 분들을 위한 기초 채널. [ 프로젝트 ] B00 ~ B12 (BE1) : 유니티 필수 기초 B13 ~ B19 (BE2) : 2D 플랫포머 B20 ~ B26 (BE3) : 2D 탑다운 대화형 RPG B27 ~ B37 (BE4) : 2D 종스크롤
www.youtube.com
3D 쿼터뷰 액션 게임: 수류탄 구현하기[B47]
1. 오브젝트 생성
2. 수류탄 투척
//Player 스크립트 파일
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class Player : MonoBehaviour {
public float speed;
public GameObject[] weapons;
public bool[] hasWeapons;
public GameObject[] grenades;
public int hasGrenades;
public GameObject grenadeObj;
public Camera followCamera;
public int ammo;
public int coin;
public int health;
public int maxAmmo;
public int maxCoin;
public int maxHealth;
public int maxHasGrenades;
float hAxis;
float vAxis;
bool wDown;
bool jDown;
bool fDown;
bool gDown;
bool rDown;
bool iDown;
bool sDown1; //망치
bool sDown2; //권총
bool sDown3; //기관총
bool isJump;
bool isDodge;
bool isSwap;
bool isReload;
bool isFireReady = true;
bool isBorder;
Vector3 moveVec;
Vector3 dodgeVec;
Animator anim;
Rigidbody rigid;
GameObject nearObject;
Weapon equipWeapon;
int equipWeaponIndex = -1;
float fireDelay;
void Awake() {
rigid = GetComponent<Rigidbody>();
anim = GetComponentInChildren<Animator>(); //Player 자식 오브젝트에 있으므로
}
void Update() {
GetInput();
Move();
Turn();
Jump();
Grenade();
Attack();
Reload();
Dodge();
Swap();
Interation();
}
void GetInput() {
hAxis = Input.GetAxisRaw("Horizontal"); //좌우 방향키
vAxis = Input.GetAxisRaw("Vertical"); //상하 방향키
wDown = Input.GetButton("Walk"); //shift 키
jDown = Input.GetButtonDown("Jump"); //스페이스바
fDown = Input.GetButton("Fire1"); //마우스 왼쪽 클릭
gDown = Input.GetButton("Fire2"); //마우스 오른쪽 클릭
rDown = Input.GetButtonDown("Reload"); //R키
iDown = Input.GetButtonDown("Interation"); //E키
sDown1 = Input.GetButton("Swap1"); //번호 1번 키
sDown2 = Input.GetButton("Swap2"); //번호 2번 키
sDown3 = Input.GetButton("Swap3"); //번호 3번 키
}
void Move() {
moveVec = new Vector3(hAxis, 0, vAxis).normalized; //normalized : 방향 값이 1로 보정된 벡터
if (isDodge) //회피 중일때는
moveVec = dodgeVec; //회피하는 중인 방향으로 유지
if (isSwap || isReload || !isFireReady) //무기 교체, 재장전, 공격 중일때는
moveVec = Vector3.zero; //멈추기
if (!isBorder)
transform.position += moveVec * speed * (wDown ? 0.3f : 1f) * Time.deltaTime;
anim.SetBool("isRun", (moveVec != Vector3.zero)); //이동을 멈추면
anim.SetBool("isWalk", wDown);
}
void Turn() {
//키보드로 회전
transform.LookAt(transform.position + moveVec); //나아갈 방향 보기
//마우스로 회전
if (fDown) {
Ray ray = followCamera.ScreenPointToRay(Input.mousePosition);
RaycastHit rayHit;
if (Physics.Raycast(ray, out rayHit, 100)) {
Vector3 nextVec = rayHit.point - transform.position;
nextVec.y = 0;
transform.LookAt(transform.position + nextVec);
}
}
}
void Jump() {
if (jDown && (moveVec == Vector3.zero) && !isJump && !isDodge && !isSwap) { //움직이지 않고 점프
rigid.AddForce(Vector3.up * 15, ForceMode.Impulse);
anim.SetBool("isJump", true);
anim.SetTrigger("doJump");
isJump = true;
}
}
void Grenade() {
if (hasGrenades == 0)
return;
if (gDown && !isReload && !isSwap) {
Ray ray = followCamera.ScreenPointToRay(Input.mousePosition);
RaycastHit rayHit;
if (Physics.Raycast(ray, out rayHit, 100)) {
Vector3 nextVec = rayHit.point - transform.position;
nextVec.y = 10;
GameObject instantGrenade = Instantiate(grenadeObj, transform.position, transform.rotation);
Rigidbody rigidGrenade = instantGrenade.GetComponent<Rigidbody>();
rigidGrenade.AddForce(nextVec, ForceMode.Impulse);
rigidGrenade.AddTorque(Vector3.back * 10, ForceMode.Impulse);
hasGrenades--;
grenades[hasGrenades].SetActive(false);
}
}
}
void Attack() {
if (equipWeapon == null)
return;
fireDelay += Time.deltaTime;
isFireReady = (equipWeapon.rate < fireDelay);
if (fDown && isFireReady && !isDodge && !isSwap && !isReload) {
equipWeapon.Use();
anim.SetTrigger(equipWeapon.type == Weapon.Type.Melee ? "doSwing" : "doShot");
fireDelay = 0;
}
}
void Reload() {
if (equipWeapon == null)
return;
if (equipWeapon.type == Weapon.Type.Melee)
return;
if (ammo == 0)
return;
if (rDown && !isJump && !isDodge && !isSwap && isFireReady) {
anim.SetTrigger("doReload");
isReload = true;
Invoke("ReloadOut", 3);
}
}
void ReloadOut() {
int reAmmo = (ammo < equipWeapon.maxAmmo) ? ammo : equipWeapon.maxAmmo;
equipWeapon.curAmmo = reAmmo;
ammo -= reAmmo;
isReload = false;
}
void Dodge() {
if (jDown && (moveVec != Vector3.zero) && !isJump && !isDodge && !isSwap) { //이동하면서 점프
dodgeVec = moveVec;
speed *= 2;
anim.SetTrigger("doDodge");
isDodge = true;
Invoke("DodgeOut", 0.4f);
}
}
void DodgeOut() {
speed *= 0.5f;
isDodge = false;
}
void Swap() {
if (sDown1 && (!hasWeapons[0] || equipWeaponIndex == 0)) return;
if (sDown2 && (!hasWeapons[1] || equipWeaponIndex == 1)) return;
if (sDown3 && (!hasWeapons[2] || equipWeaponIndex == 2)) return;
int weaponIndex = -1;
if (sDown1) weaponIndex = 0;
if (sDown2) weaponIndex = 1;
if (sDown3) weaponIndex = 2;
if ((sDown1 || sDown2 || sDown3) && !isJump && !isDodge) {
if (equipWeapon != null)
equipWeapon.gameObject.SetActive(false);
equipWeaponIndex = weaponIndex;
equipWeapon = weapons[weaponIndex].GetComponent<Weapon>();
equipWeapon.gameObject.SetActive(true);
anim.SetTrigger("doSwap");
isSwap = true;
Invoke("SwapOut", 0.4f);
}
}
void SwapOut() {
isSwap = false;
}
void Interation() {
if (iDown && nearObject != null && !isJump && !isDodge) {
if (nearObject.tag == "Weapon") {
Item item = nearObject.GetComponent<Item>();
int weaponIndex = item.value;
hasWeapons[weaponIndex] = true;
Destroy(nearObject);
}
}
}
void FreezeRotation() {
rigid.angularVelocity = Vector3.zero;
}
void StopToWall() {
Debug.DrawRay(transform.position, transform.forward * 5, Color.green);
isBorder = Physics.Raycast(transform.position, moveVec, 5, LayerMask.GetMask("Wall"));
}
void FixedUpdate() {
FreezeRotation();
StopToWall();
}
void OnCollisionEnter(Collision collision) {
if (collision.gameObject.tag == "Floor") {
anim.SetBool("isJump", false);
isJump = false;
}
}
void OnTriggerEnter(Collider other) {
if (other.tag == "Item") {
Item item = other.GetComponent<Item>();
switch(item.type) {
case Item.Type.Ammo:
ammo += item.value;
if (ammo > maxAmmo)
ammo = maxAmmo;
break;
case Item.Type.Coin:
coin += item.value;
if (coin > maxCoin)
coin = maxCoin;
break;
case Item.Type.Heart:
health += item.value;
if (health > maxHealth)
health = maxHealth;
break;
case Item.Type.Grenade:
if (hasGrenades == maxHasGrenades)
return;
grenades[hasGrenades].SetActive(true);
hasGrenades += item.value;
if (hasGrenades > maxHasGrenades)
hasGrenades = maxHasGrenades;
break;
}
Destroy(other.gameObject);
}
}
void OnTriggerStay(Collider other) {
if (other.tag == "Weapon")
nearObject = other.gameObject;
}
void OnTriggerExit(Collider other) {
if (other.tag == "Weapon")
nearObject = null;
}
}
3. 수류탄 폭발
//Grenade 스크립트 파일
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class Grenade : MonoBehaviour {
public GameObject meshObj;
public GameObject effectObj;
public Rigidbody rigid;
void Start() {
StartCoroutine(Explosion());
}
IEnumerator Explosion() {
yield return new WaitForSeconds(3f);
rigid.velocity = Vector3.zero;
rigid.angularVelocity = Vector3.zero;
meshObj.SetActive(false);
effectObj.SetActive(true);
}
}
4. 수류탄 피격
//Enemy 스크립트 파일
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class Enemy : MonoBehaviour {
public int maxHealth;
public int curHealth;
Rigidbody rigid;
BoxCollider boxCollider;
Material mat;
void Awake() {
rigid = GetComponent<Rigidbody>();
boxCollider = GetComponent<BoxCollider>();
mat = GetComponent<MeshRenderer>().material;
}
void OnTriggerEnter(Collider other) {
if (other.tag == "Melee") {
Weapon weapon = other.GetComponent<Weapon>();
curHealth -= weapon.damage;
Vector3 reactVec = transform.position - other.transform.position;
StartCoroutine(OnDamage(reactVec, false));
}
else if (other.tag == "Bullet") {
Bullet bullet = other.GetComponent<Bullet>();
curHealth -= bullet.damage;
Vector3 reactVec = transform.position - other.transform.position;
Destroy(other.gameObject);
StartCoroutine(OnDamage(reactVec, false));
}
}
public void HitByGrenade(Vector3 explosionPos) {
curHealth -= 100;
Vector3 reactVec = transform.position - explosionPos;
StartCoroutine(OnDamage(reactVec, true));
}
IEnumerator OnDamage(Vector3 reactVec, bool isGrenade) {
mat.color = Color.red;
yield return new WaitForSeconds(0.1f);
if (curHealth > 0) {
mat.color = Color.white;
}
else {
mat.color = Color.gray;
gameObject.layer = 12; //Enemy Dead 레이어로 변경
if (isGrenade) {
reactVec = reactVec.normalized;
reactVec += Vector3.up * 3;
rigid.freezeRotation = false;
rigid.AddForce(reactVec * 5, ForceMode.Impulse);
rigid.AddTorque(reactVec * 15, ForceMode.Impulse);
}
else {
reactVec = reactVec.normalized;
reactVec += Vector3.up;
rigid.AddForce(reactVec * 5, ForceMode.Impulse);
}
Destroy(gameObject, 4);
}
}
}
//Grenade 스크립트 파일
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class Grenade : MonoBehaviour {
public GameObject meshObj;
public GameObject effectObj;
public Rigidbody rigid;
void Start() {
StartCoroutine(Explosion());
}
IEnumerator Explosion() {
yield return new WaitForSeconds(3f);
rigid.velocity = Vector3.zero;
rigid.angularVelocity = Vector3.zero;
meshObj.SetActive(false);
effectObj.SetActive(true);
RaycastHit[] rayHits = Physics.SphereCastAll(transform.position, 15, Vector3.up, 0f, LayerMask.GetMask("Enemy"));
foreach(RaycastHit hitObj in rayHits) {
hitObj.transform.GetComponent<Enemy>().HitByGrenade(transform.position);
}
Destroy(gameObject, 5);
}
}
- Physics.SphereCastAll(Ray ray, float radius, Vector3 direction, float maxDistance, int layerMask) : 구체 모양의 레이캐스팅(모든 오브젝트). SphereCast는 하나만 처리한다.