PGiZ1/Assets/Code/Track/TrackGenerator.cs

using System.Collections.Generic;
using UnityEngine;

namespace Code.Track
{
    public static class TrackGenerator
    {
        public static TrackData Generate(int seed, float targetLength = 200f, int segmentCount = 15)
        {
            Random.InitState(seed);

            var points = new List<Vector3> { Vector3.zero };
            var currentPos = Vector3.zero;
            var direction = Vector3.forward;

            for (var i = 0; i < segmentCount; i++)
            {
                var turn = Random.Range(-25f, 25f);
                direction = Quaternion.Euler(0, turn, 0) * direction;
                direction.y = 0;
                direction.Normalize();

                var segLen = targetLength / segmentCount;
                currentPos += direction * segLen;
                points.Add(currentPos);
            }

            var actualLength = 0f;
            for (var i = 1; i < points.Count; i++)
                actualLength += Vector3.Distance(points[i - 1], points[i]);

            if (actualLength > 0.1f)
            {
                var scale = targetLength / actualLength;
                for (var i = 1; i < points.Count; i++)
                    points[i] *= scale;
            }

            return new TrackData(points);
        }
    }
}