Basic/Primitive Curve maker and viewer for Unity

Curve.cs

using System;
using System.Collections.Generic;
using UnityEngine;
using Random = UnityEngine.Random;

[Serializable]
public class Curve
{
    public Vector3[] points;
    public int generateCount;
    public float tunnelLength = 50f;
    public float tunnelWidth = 10f;
    public float tunnelHeight = 5f;
    public int resolution = 500;

    public void GenerateBezierPoints()
    {
        var stepLength = tunnelLength / generateCount;

        points = new Vector3[generateCount];

        var p0 = new Vector3(
            Random.Range(-tunnelWidth / 2f, tunnelWidth / 2f),
            Random.Range(-tunnelHeight / 2f, tunnelHeight / 2f),
            Random.Range(0, tunnelLength / 2f)
        );

        p0.z = Random.Range(0f, stepLength);
        points[0] = p0;


        for (var i = 1; i < generateCount - 1; i++)
        {
            var point = new Vector3(
                p0.x + Random.Range(-tunnelWidth / 2f, tunnelWidth / 2f),
                p0.y + Random.Range(-tunnelHeight / 2f, tunnelHeight / 2f),
                Random.Range(stepLength * i, stepLength * (i + 1))
            );


            points[i] = point;
        }

        points[generateCount - 1] = new Vector3(
            p0.x + Random.Range(0, tunnelWidth),
            p0.y + Random.Range(0, tunnelHeight),
            tunnelLength
        );
    }

    public Vector3 CalculatePointOnTheCurve(float t)
    {
        var count = points.Length;
        var tempControlPoints = new List<Vector3>(points);

        for (var level = 0; level < count; level++)
        for (var i = 0; i < count - level - 1; i++)
            tempControlPoints[i] = Vector3.Lerp(tempControlPoints[i], tempControlPoints[i + 1], t);

        return tempControlPoints[0];
    }


    public void DrawGizmos()
    {
        if (points == null || points.Length == 0) return;


        Gizmos.color = Color.white;
        var previousPoint = points[0];
        for (var i = 1; i <= resolution; i++)
        {
            var t = i / (float)resolution;
            var pointOnCurve = CalculatePointOnTheCurve(t);
            Gizmos.DrawLine(previousPoint, pointOnCurve);
            previousPoint = pointOnCurve;
        }
    }

    public void DrawHandles()
    {
        // draw handles ?
        Gizmos.color = Color.red;

        for (var i = 0; i < points.Length - 3; i++)
        {
            var p0 = points[i];
            var p1 = points[i + 1];
            var p2 = points[i + 2];
            var p3 = points[i + 3];
            Gizmos.DrawLine(p0, p1);
            Gizmos.DrawLine(p2, p3);
        }
    }
}