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Full script file:

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

public class Graph : MonoBehaviour
{

    [SerializeField]
    Transform pointPrefab;

    [SerializeField, Range(10,100)]
    int resolution = 10;

    Transform[] points;
    points = new Transform[resolution];

    void Awake()
    {
        float step = 2f / resolution;
        var position = Vector3.zero;
        var scale = Vector3.one * step;
        for (int i =0;  i < points.Length; i  )
        {
            Transform point  = Instantiate(pointPrefab);
            position.x = (i   .5f) * step - 1f;
            position.y = position.x * position.x * position.x;
            point.localPosition = position;
            point.localScale = Vector3.one / 5f;
            point.SetParent(transform, false);
        }
    }
}

The compiler really doesn't like line 15. First it says "points" doesn't exist in the current context, even though I declared it in the line before. Then it says "invalid token = in class, struct, or member declaration". Then it says "array size cannot be specified in variable declaration".

CodePudding user response：

You are trying to write code directly within the class. That is not allowed.

Normally, you could join the field initializer with the field declaration:

Transform[] points = new Transform[resolution];

However, an instance field initializer cannot reference other instance fields. In this case, you would need to use a constructor:

Transform[] points;

public Graph()
{
    points = new Transform[resolution];
}

Fields - C# Programming Guide | Microsoft Docs