화면 클릭시 방사형으로 퍼지는 오브젝트 만들기 Radial Wave Control | 유니티 게임 개발 튜토리얼(Unity & C# Script)

 

 

화면을 클릭하면 오브젝트가 방사형으로 확산되는 걸 만들어봅니다. 오브젝트 개수와 퍼지는 속도도 조절 가능.

 

 

 

[RadialWaveControl.cs]

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class RadialWaveControl : MonoBehaviour
{
    [SerializeField] int numWave;
    [SerializeField] GameObject waveImg;
    [SerializeField] float radius = 5f, speed = 5f;

    Vector2 startSpot;

    void Update()
    {
        if (Input.GetButtonDown("Fire1"))
        {
            startSpot = Camera.main.ScreenToWorldPoint(Input.mousePosition);
            SpawnWave(numWave);
        }
    }

    void SpawnWave(int numWave)
    {
        float angleStep = 360f / numWave;
        float angle = 0f;

        for(int i = 0; i <= numWave - 1; i++)
        {
            float waveXpos = startSpot.x + Mathf.Sin((angle * Mathf.PI) / 180) * radius;
            float waveYpos = startSpot.y + Mathf.Cos((angle * Mathf.PI) / 180) * radius;

            Vector2 waveVector = new Vector2(waveXpos, waveYpos);
            Vector2 waveMoveDir = (waveVector - startSpot).normalized * speed;

            var wave = Instantiate(waveImg, startSpot, Quaternion.identity);
            wave.GetComponent<Rigidbody2D>().velocity = new Vector2(waveMoveDir.x, waveMoveDir.y);

            angle += angleStep;
        }
    }
}