1 using UnityEngine; 2 using System.Collections; 3  4 public class Fractal : MonoBehaviour { 5     public Mesh[] meshes; 6     public Material material; 7     public int maxDepth; 8     public float childScale; 9     private int depth;10     public float spawnProbability;11     public float maxRotationSpeed;12     private float rotationSpeed;13 14     private static Vector3[] childDirections = {15                                                    Vector3.up,16                                                    Vector3.right,17                                                    Vector3.left,18                                                    Vector3.forward,19                                                    Vector3.back,20                                                    Vector3.down21                                                };22 23     private static Quaternion[] childOrientations = {24                                                         Quaternion.identity,25                                                         Quaternion.Euler(0f, 0f, -90f),26                                                         Quaternion.Euler(0f, 0f, 90f),27                                                         Quaternion.Euler(90f, 0f, 0f),28                                                         Quaternion.Euler(-90f, 0f, 0f),29                                                         Quaternion.Euler(0f, 0f, 180f)30                                                     };31 32     private Material[,] materials;33 34     private void InitializeMaterials() {35         materials = new Material[maxDepth + 1, 2];36         for (int i = 0; i <= maxDepth; i++) {37             float t = i / (maxDepth - 1f);38             t *= t;39             materials[i, 0] = new Material(material);40             materials[i, 0].color = Color.Lerp(Color.white, Color.yellow, t);41             materials[i, 1] = new Material(material);42             materials[i, 1].color = Color.Lerp(Color.white, Color.cyan, t);43         }44         materials[maxDepth, 0].color = Color.magenta;45         materials[maxDepth, 1].color = Color.red;46     }47 48     // Use this for initialization49     void Start() {50         if(materials == null){51             InitializeMaterials();52         }53         gameObject.AddComponent<MeshFilter>().mesh = meshes[Random.Range(0, meshes.Length)];54         gameObject.AddComponent<MeshRenderer>().material = materials[depth, Random.Range(0, 2)];55         rotationSpeed = Random.Range(-maxRotationSpeed, maxRotationSpeed);56         if(depth < maxDepth) {57             StartCoroutine(CreateChildren());58         }59 60     }61 62     private IEnumerator CreateChildren() {63         for (int i = 0; i < childDirections.Length; ++i) {64             if (Random.value < spawnProbability) {65                 yield return new WaitForSeconds(Random.Range(0.1f, 0.5f));66                 new GameObject("Fractal Child").AddComponent<Fractal>().Initialize(this, i);67             }68             69         }70     }71 72     private void Initialize(Fractal parent, int childIndex) {73         meshes = parent.meshes;74         materials = parent.materials;75         maxDepth = parent.maxDepth;76         depth = parent.depth + 1;77         transform.parent = parent.transform;78         childScale = parent.childScale;79         transform.localScale = Vector3.one * childScale;80         transform.localPosition = childDirections[childIndex] * (0.5f + 0.5f * childScale);81         transform.localRotation = childOrientations[childIndex];82         spawnProbability = parent.spawnProbability;83         maxRotationSpeed = parent.maxRotationSpeed;84     }85 86     // Update is called once per frame87     void Update() {88         transform.Rotate(0f, rotationSpeed * Time.deltaTime, 0f);89     }90 }