242 lines
9.4 KiB
C#
242 lines
9.4 KiB
C#
using System.Reflection;
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using UnityEngine;
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using XericLibrary.Runtime.UIGraph;
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namespace XericLibrary.Runtime.Chart
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{
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/// <summary>
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/// 折线图表渲染工具。
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///
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/// 创建 UILineRendererV2 子组件绘制折线。
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/// 在 OnRender 中将数据坐标映射为图表区域局部坐标后绘制。
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///
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/// 子节点结构：
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/// [charttool_line_ugui]
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/// └─ LineRenderer (UILineRendererV2)
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/// </summary>
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[AddComponentMenu("Xeric/Chart/Line Chart Tool")]
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public class ChartToolLineUgui : ChartToolBase
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{
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// ── 外观配置 ──────────────────────────────────────────────
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/// <summary>折线颜色</summary>
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public Color LineColor { get; set; } = new Color(0.33f, 0.67f, 1f, 1f);
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/// <summary>折线宽度</summary>
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public float LineThickness { get; set; } = 4f;
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/// <summary>图表内边距（左、下、右、上，像素）</summary>
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public Vector4 Margin { get; set; } = new Vector4(50f, 40f, 20f, 20f);
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/// <summary>是否自动清除旧线段</summary>
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public bool AutoClear { get; set; } = true;
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/// <summary>是否启用 Catmull-Rom 平滑线</summary>
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public bool SmoothLine { get; set; }
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/// <summary>平滑分段数</summary>
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public int SmoothSegments { get; set; } = 8;
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// ── 内部组件 ──────────────────────────────────────────────
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/// <summary>折线渲染器</summary>
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public UILineRendererV2 LineRenderer { get; private set; }
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// ── 反射助手 ──────────────────────────────────────────────
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private static FieldInfo s_VertexField;
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private static FieldInfo s_SegmentField;
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private static FieldInfo s_DirtyStartField;
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private static void EnsureReflection()
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{
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if (s_VertexField != null) return;
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var flags = BindingFlags.Instance | BindingFlags.NonPublic;
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var baseType = typeof(CacheLineRendererBase);
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s_VertexField = baseType.GetField("m_VertexData", flags);
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s_SegmentField = baseType.GetField("m_SegmentRanges", flags);
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s_DirtyStartField = baseType.GetField("m_DirtyStartSegment", flags);
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}
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/// <summary>清除线段渲染器内部缓存</summary>
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private static void ClearLineInternal(CacheLineRendererBase renderer)
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{
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if (renderer == null) return;
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EnsureReflection();
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var vList = s_VertexField?.GetValue(renderer) as System.Collections.Generic.List<LineVertexData>;
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var sList = s_SegmentField?.GetValue(renderer) as System.Collections.Generic.List<LineSegmentRange>;
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vList?.Clear();
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sList?.Clear();
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s_DirtyStartField?.SetValue(renderer, 0);
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}
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// ── 初始化 ────────────────────────────────────────────────
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protected override void OnInitialize()
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{
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// 1. 默认可见范围
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SetViewRange(0, ChartViewRange.ValueMode(-100f, 100f, 200));
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SetViewRange(1, ChartViewRange.ValueMode(-100f, 100f, 200));
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// 2. 创建线段渲染器
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LineRenderer = CreateChildComponent<UILineRendererV2>("LineRenderer");
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if (LineRenderer != null)
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{
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LineRenderer.defaultColor = LineColor;
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LineRenderer.defaultThickness = LineThickness;
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var rt = LineRenderer.rectTransform;
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rt.anchorMin = Vector2.zero;
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rt.anchorMax = Vector2.one;
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rt.offsetMin = new Vector2(Margin.x, Margin.y);
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rt.offsetMax = new Vector2(-Margin.z, -Margin.w);
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}
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SetVisible(true);
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}
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// ── 渲染 ──────────────────────────────────────────────────
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public override void OnRender()
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{
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base.OnRender();
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if (LineRenderer == null || DataModel == null) return;
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var xRange = GetViewRange(0);
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var yRange = GetViewRange(1);
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// 创建泛型索引器
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var xData = DataModel.GetDimension(0);
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var yData = DataModel.GetDimension(1);
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var xIndexer = xRange.CreateIndexer(xData);
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var yIndexer = yRange.CreateIndexer(yData);
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int pointCount = Mathf.Min(xIndexer.Count, yIndexer.Count);
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if (pointCount < 2) return;
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var rt = LineRenderer.rectTransform;
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Vector2 plotSize = rt.rect.size;
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if (plotSize.x < 1f || plotSize.y < 1f) return;
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// 生成局部坐标点
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Vector2[] rawPoints = new Vector2[pointCount];
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for (int i = 0; i < pointCount; i++)
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rawPoints[i] = MapVisiblePoint(i, xIndexer, yIndexer, xRange, yRange, plotSize);
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// 平滑
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if (SmoothLine && rawPoints.Length > 2)
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rawPoints = GenerateSmoothPoints(rawPoints, SmoothSegments);
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// 清空旧数据 + 绘制新折线
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if (AutoClear)
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ClearLineInternal(LineRenderer);
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LineVertexData[] vertices = new LineVertexData[rawPoints.Length];
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for (int i = 0; i < rawPoints.Length; i++)
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{
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vertices[i] = new LineVertexData
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{
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position = rawPoints[i],
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color = LineColor,
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thickness = LineThickness,
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userData = Vector4.zero,
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};
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}
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LineRenderer.DrawPolyline(vertices, UVMode.ByDistance);
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}
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// ── 坐标映射 ──────────────────────────────────────────────
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/// <summary>将可见范围内的第 visibleIndex 个数据点映射为图表局部坐标</summary>
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private static Vector2 MapVisiblePoint(int visibleIndex,
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ChartVisibleIndexer<double> xIdx, ChartVisibleIndexer<double> yIdx,
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ChartViewRange xRange, ChartViewRange yRange,
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Vector2 plotSize)
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{
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float px, py;
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if (xRange.Mode == ViewRangeMode.Index)
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{
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// X 轴为索引模式 → 按索引比例均分宽度
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int count = Mathf.Max(xIdx.Count, 1);
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px = (float)visibleIndex / (count - 1) * plotSize.x;
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}
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else
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{
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// X 轴为值模式 → 按数据值映射
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double dataX = xIdx[visibleIndex];
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px = xRange.ValueSpan > 0f
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? (float)((dataX - xRange.ValueMin) / xRange.ValueSpan * plotSize.x)
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: 0f;
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}
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if (yRange.Mode == ViewRangeMode.Index)
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{
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// Y 轴为索引模式 → Y 数据值映射到高度
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double dataY = yIdx[visibleIndex];
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py = yRange.ValueSpan > 0f
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? (float)((dataY - yRange.ValueMin) / yRange.ValueSpan * plotSize.y)
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: 0f;
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}
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else
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{
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// Y 轴为值模式
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double dataY = yIdx[visibleIndex];
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py = yRange.ValueSpan > 0f
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? (float)((dataY - yRange.ValueMin) / yRange.ValueSpan * plotSize.y)
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: 0f;
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}
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return new Vector2(px, py);
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}
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// ── 平滑插值 ──────────────────────────────────────────────
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private static Vector2[] GenerateSmoothPoints(Vector2[] points, int segs)
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{
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int n = points.Length;
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if (n < 3) return points;
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var result = new Vector2[(n - 1) * segs + 1];
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int idx = 0;
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for (int i = 0; i < n - 1; i++)
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{
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Vector2 p0 = i > 0 ? points[i - 1] : points[i];
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Vector2 p1 = points[i];
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Vector2 p2 = points[i + 1];
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Vector2 p3 = i < n - 2 ? points[i + 2] : points[i + 1];
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for (int j = 0; j < segs; j++)
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{
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float t = j / (float)segs;
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result[idx++] = CatmullRom(p0, p1, p2, p3, t);
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}
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}
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result[idx] = points[n - 1];
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return result;
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}
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private static Vector2 CatmullRom(Vector2 p0, Vector2 p1, Vector2 p2, Vector2 p3, float t)
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{
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float t2 = t * t, t3 = t2 * t;
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float a = -0.5f * t3 + 1.0f * t2 - 0.5f * t;
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float b = 1.5f * t3 - 2.5f * t2 + 1.0f;
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float c = -1.5f * t3 + 2.0f * t2 + 0.5f * t;
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float d = 0.5f * t3 - 0.5f * t2;
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return a * p0 + b * p1 + c * p2 + d * p3;
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}
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// ── 清理 ──────────────────────────────────────────────────
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protected override void OnDispose()
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{
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LineRenderer = null;
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}
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}
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}
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