feat: 인터랙티브 3D 프랙탈 나무 제너레이터 구현

재귀 호출을 이용한 360도 나뭇가지 뻗기 로직 완성 ( tree.cs ) 코루틴을 활용한 나뭇가지 순차 생성 애니메이션 추가 색상 그라데이션, 길이/각도 난수화 등 아티스틱 파라미터(Artistic Settings) 에디터 노출 Sine/Cosine 곡선을 활용한 나뭇가지 바람 흔들림( BranchSway ) 효과 추가 인스턴스화된 프리팹 관리를 위한 부모 컨테이너 시스템 도입
1 month ago · b7f355d87f
parent f461f2a059
commit b7f355d87f
11 changed files with 813 additions and 16 deletions
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@ -336,6 +336,9 @@ Light:
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--- a/Assets/Scripts.meta
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--- a/Assets/Scripts/tree.cs
+++ b/Assets/Scripts/tree.cs
@ -0,0 +1,119 @@
+using System.Collections;
+using UnityEngine;
+
+public class tree : MonoBehaviour
+{
+
+    public GameObject branchPrefab;
+    public int maxDepth = 4;
+    public float branchAngle = 45f;
+    public float scaleReduction = 0.6f;
+    public float initialLength = 5f;
+    public int branchesPerLevel = 4;
+
+    [Header("Artistic Settings")]
+    public Color trunkColor = new Color(0.4f, 0.2f, 0f); // 나무 몸통 (갈색)
+    public Color leafColor = new Color(1f, 0.4f, 0.6f); // 가지 끝부분 (핑크/벚꽃 느낌)
+    [Range(0f, 1f)] public float lengthRandomness = 0.2f; // 길이 랜덤 (0~1)
+    [Range(0f, 45f)] public float angleRandomness = 20f; // 휘어짐 극대화를 위한 각도 랜덤
+
+    [Header("Animation & Wind")]
+    public float growthDelay = 0.1f; // 가지 생성 대기 시간 (애니메이션 효과)
+    [Range(0f, 5f)] public float windStrength = 1.5f; // 바람의 세기
+
+    private GameObject branchContainer;
+
+    void Start()
+    {
+        // Hierarchy 창을 깔끔하게 유지하기 위한 컨테이너 생성
+        branchContainer = new GameObject("TreeContainer");
+        branchContainer.transform.position = transform.position;
+
+        StartCoroutine(CreateBranchRoutine(transform.position, transform.rotation, initialLength, 0, branchContainer.transform));
+    }
+
+    IEnumerator CreateBranchRoutine(Vector3 pos, Quaternion rot, float length, int depth, Transform parentTransform)
+    {
+        if (depth >= maxDepth) yield break;
+
+        // 런타임에서 자라나는 모습을 보여주기 위한 대기 시간
+        yield return new WaitForSeconds(growthDelay);
+
+        // 바람에 흔들릴 때 관절이 끊어지지 않도록, 가지 시작점(pos)에 가상의 피벗(Pivot)을 생성
+        GameObject pivot = new GameObject("Pivot_Depth_" + depth);
+        pivot.transform.position = pos;
+        pivot.transform.rotation = rot;
+        pivot.transform.parent = parentTransform;
+
+        // 흔들림(Sway) 스크립트 추가
+        BranchSway sway = pivot.AddComponent<BranchSway>();
+        sway.Init(depth, windStrength);
+
+        // 중앙 피벗 큐브를 위한 중심 위치 계산
+        Vector3 centerPos = pos + rot * (Vector3.up * length * 0.5f);
+
+        // 나뭇가지를 생성하고 부모를 생성한 피벗으로 설정
+        GameObject branch = Instantiate(branchPrefab, centerPos, rot);
+        branch.transform.parent = pivot.transform;
+
+        // 아티스틱: 깊이에 따라 색상 자연스럽게 섞기 (Lerp)
+        Renderer rnd = branch.GetComponentInChildren<Renderer>();
+        if (rnd != null)
+        {
+            float colorT = maxDepth > 1 ? (float)depth / (maxDepth - 1) : 1f;
+            rnd.material.color = Color.Lerp(trunkColor, leafColor, colorT);
+        }
+
+        // 동적 크기 조절: 깊이에 따라 두께가 얇아짐
+        float thickness = 0.15f * (maxDepth - depth);
+        branch.transform.localScale = new Vector3(thickness, length, thickness);
+
+        // 가지의 끝 지점 계산
+        Vector3 endPoint = pos + rot * (Vector3.up * length);
+
+        // 길이 및 각도 세팅
+        float randomizedLengthMultiplier = Random.Range(1f - lengthRandomness, 1f + lengthRandomness);
+        float nextLength = length * scaleReduction * randomizedLengthMultiplier;
+        float angleStep = 360f / branchesPerLevel;
+
+        for (int i = 0; i < branchesPerLevel; i++)
+        {
+            float randTilt = Random.Range(-angleRandomness, angleRandomness);
+            float randSpin = Random.Range(-angleRandomness, angleRandomness);
+
+            Quaternion tilt = Quaternion.Euler(branchAngle + randTilt, 0, 0);
+            Quaternion spin = Quaternion.Euler(0, (i * angleStep) + (depth * 25f) + randSpin, 0);
+
+            Quaternion finalRot = rot * spin * tilt;
+
+            // 다음 가지 생성 코루틴 실행
+            StartCoroutine(CreateBranchRoutine(endPoint, finalRot, nextLength, depth + 1, pivot.transform));
+        }
+    }
+}
+
+// 바람에 흔들리는 효과를 담당하는 컴포넌트
+public class BranchSway : MonoBehaviour
+{
+    private Quaternion initialLocalRotation;
+    private float speed = 1f;
+    private float amount = 2f;
+    private float offset;
+
+    public void Init(int depth, float windStrength)
+    {
+        initialLocalRotation = transform.localRotation;
+        offset = Random.Range(0f, 100f);
+        speed = 1f + Random.Range(0f, 0.5f);
+        // 끝가지일수록, 그리고 windStrength가 강할수록 더 많이 흔들림. 잘 보이도록 수치를 키움
+        amount = 2.5f * (depth + 1) * windStrength;
+    }
+
+    void Update()
+    {
+        // 시간에 따라 부드럽게 흔들리도록 사인 곡선 적용
+        float angleX = Mathf.Sin(Time.time * speed + offset) * amount;
+        float angleZ = Mathf.Cos(Time.time * speed * 0.8f + offset) * amount;
+        transform.localRotation = initialLocalRotation * Quaternion.Euler(angleX, 0, angleZ);
+    }
+}
--- a/Assets/Scripts/tree.cs.meta
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