121 lines
4.4 KiB
C#
121 lines
4.4 KiB
C#
using UnityEngine;
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/// <summary>
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/// 按屏幕宽高比动态拉长轨道视觉物体(track1-5)的 Y 缩放,让宽屏下轨道更饱满。
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///
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/// 原理：宽屏时水平视野大、轨道相对缩在中间显细。降相机高度+抬头能让轨道透视放大,
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/// 但仍不够饱满。再叠加"拉长轨道 Y 缩放"填满纵向视野,视觉更满。
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///
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/// 关键：轨道只是背景视觉,判定是几何驱动(音符世界 Y vs 判定线世界 Y)。
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/// 缩放轨道 localScale 不影响音符生成/下落/判定——它们全用世界坐标,与轨道视觉无关。
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///
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/// 用法：挂到场景任意物体(会自动找 track1-5 或指定 trackParent)。运行时自动扫描并缩放。
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/// </summary>
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[DisallowMultipleComponent]
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public sealed class TrackScaler : MonoBehaviour
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{
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[Tooltip("是否启用轨道缩放。关闭则恢复基准值 2.5。")]
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public bool enableScaling = true;
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[Tooltip("设计基准宽高比。16:9 = 1.7778。此比例下缩放为基准值。")]
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public float designAspect = 16f / 9f;
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[Tooltip("轨道 Y 缩放的基准值(场景序列化的初始值)。从这个值开始按宽高比放大。")]
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public float baseScaleY = 2.5f;
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[Header("宽屏(aspect > 设计)缩放")]
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[Tooltip("每偏离设计宽高比 1.0，额外叠加的 Y 缩放倍数。宽屏拉长轨道让视觉更满。")]
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public float widePerAspectScaleY = 0.8f;
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[Tooltip("Y 缩放的绝对上限。避免极端超宽屏拉得过长。")]
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public float maxScaleY = 4.5f;
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[Tooltip("(可选)轨道的父节点。留空则自动全场景查找 track1-5。")]
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public Transform trackParent;
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private Transform[] _tracks;
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private float _lastAspect = -1f;
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private bool _lastEnabled;
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private void OnEnable()
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{
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FindTracks();
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_lastAspect = -1f;
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Apply();
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}
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private void Update()
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{
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float aspect = (float)Screen.width / Mathf.Max(1, Screen.height);
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if (Mathf.Abs(aspect - _lastAspect) > 0.0001f || enableScaling != _lastEnabled)
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{
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Apply();
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}
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}
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private void FindTracks()
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{
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if (trackParent != null)
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{
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// 从指定父节点下找
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_tracks = new Transform[5];
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for (int i = 0; i < trackParent.childCount; i++)
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{
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Transform child = trackParent.GetChild(i);
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if (child.name == "track1") _tracks[0] = child;
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else if (child.name == "track2") _tracks[1] = child;
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else if (child.name == "track3") _tracks[2] = child;
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else if (child.name == "track4") _tracks[3] = child;
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else if (child.name == "track5") _tracks[4] = child;
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}
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}
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else
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{
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// 全场景查找(慢,但兜底)
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_tracks = new Transform[5];
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GameObject go1 = GameObject.Find("track1");
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GameObject go2 = GameObject.Find("track2");
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GameObject go3 = GameObject.Find("track3");
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GameObject go4 = GameObject.Find("track4");
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GameObject go5 = GameObject.Find("track5");
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if (go1 != null) _tracks[0] = go1.transform;
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if (go2 != null) _tracks[1] = go2.transform;
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if (go3 != null) _tracks[2] = go3.transform;
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if (go4 != null) _tracks[3] = go4.transform;
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if (go5 != null) _tracks[4] = go5.transform;
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}
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}
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private void Apply()
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{
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if (_tracks == null || _tracks.Length == 0)
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{
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FindTracks(); // 重试
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if (_tracks == null || _tracks.Length == 0) return;
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}
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float aspect = (float)Screen.width / Mathf.Max(1, Screen.height);
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_lastAspect = aspect;
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_lastEnabled = enableScaling;
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float targetScaleY = baseScaleY;
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if (enableScaling && aspect > designAspect)
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{
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// 宽屏：额外拉长 Y
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float dev = aspect - designAspect;
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float extra = widePerAspectScaleY * dev;
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targetScaleY = Mathf.Min(baseScaleY + extra, maxScaleY);
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}
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// aspect <= designAspect 或关闭：保持基准值
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// 应用到所有轨道
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for (int i = 0; i < _tracks.Length; i++)
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{
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if (_tracks[i] == null) continue;
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Vector3 scale = _tracks[i].localScale;
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scale.y = targetScaleY;
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_tracks[i].localScale = scale;
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}
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}
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}
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