gizmo 생성하기.

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gizmo 생성해서 뿌리는 코드.

using System.Collections;
using UnityEngine;

[RequireComponent(typeof(MeshFilter), typeof(MeshRenderer))]
public class GridTest : MonoBehaviour
{
    public int xSize, ySize;
    private Vector3[] vertices;
        private void Awake() {
        StartCoroutine(Generated());
    }

    IEnumerator Generated() {
        yield return new WaitForSeconds(0.5f);
        vertices = new Vector3[(xSize + 1) * (ySize + 1)];
        for(int i=0, y=0; y <= ySize; y++) {
            for(int x =0; x<=xSize; x++, i++) {
                vertices[i] = new Vector3(x, y);
                yield return new WaitForSeconds(0.1f);
            }
        }
        yield return null;
        
    }

    private void OnDrawGizmos() {
        if (vertices == null) {
            return;
        }
        
        Gizmos.color = Color.black;
        for(int i=0; i < vertices.Length; i++) {
            Gizmos.DrawSphere(vertices[i], 0.1f);
        }
    }
}