246 lines
11 KiB
C#
246 lines
11 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Collections.ObjectModel;
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using MultiWheelC.TrajectoryPlanning.CoarsePath;
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using MultiWheelC.TrajectoryPlanning.CoarsePath.Vehicle;
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using MultiWheelC.TrajectoryPlanning.Mapping;
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using MultiWheelC.TrajectoryPlanning.PathSmoothing.Processing;
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using MultiWheelC.TrajectoryPlanning.Utils;
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namespace MultiWheelC.TrajectoryPlanning.PathSmoothing.Validation;
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/// <summary>独立复核平滑候选的端点拓扑、车辆曲率和连续车体安全性。</summary>
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public sealed class SmoothedPathValidator
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{
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private const double Tolerance = 1e-6d;
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private readonly FootprintCollisionChecker _collisionChecker;
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/// <summary>创建使用默认连续车体碰撞检查器的平滑路径验证器。</summary>
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public SmoothedPathValidator()
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: this(new FootprintCollisionChecker())
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{
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}
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/// <summary>创建使用指定连续车体碰撞检查器的平滑路径验证器。</summary>
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public SmoothedPathValidator(FootprintCollisionChecker collisionChecker)
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{
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_collisionChecker = collisionChecker ?? throw new ArgumentNullException(nameof(collisionChecker));
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}
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/// <summary>
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/// 复核候选平滑路径。每个候选方向段必须保持原始段的端点和换向拓扑；
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/// 输出中的净空均由本次实际车体检查重新计算，绝不沿用候选声明值。
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/// </summary>
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public bool TryValidate(
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IReadOnlyList<SmoothedPathPoint> candidatePath,
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IReadOnlyList<SmoothedPathSegment> candidateSegments,
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PreparedPath originalPath,
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PlanningGridMap map,
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VehicleParameters vehicle,
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double maximumCollisionCheckStepMeters,
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out IReadOnlyList<SmoothedPathPoint> pathWithClearance,
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out double minimumClearanceMeters,
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out string reason)
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{
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pathWithClearance = EmptyPath();
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minimumClearanceMeters = 0d;
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reason = string.Empty;
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if (candidatePath == null || candidateSegments == null || originalPath == null || map == null || vehicle == null ||
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candidatePath.Count == 0 || candidateSegments.Count == 0 || !NumericGuard.IsPositiveFinite(maximumCollisionCheckStepMeters))
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{
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reason = "平滑候选、原始路径、地图、车辆或碰撞步长无效。";
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return false;
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}
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if (!VehicleKinematics.TryGetMaximumCurvaturePerMeter(vehicle, out double maximumCurvatureMeters))
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{
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reason = "车辆曲率约束无效。";
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return false;
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}
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if (!TryValidateSegmentTopology(candidatePath, candidateSegments, originalPath, out reason)) return false;
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if (Math.Abs(candidatePath[0].ArcLength) > Tolerance)
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{
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reason = "平滑路径首点的全局弧长必须为零。";
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return false;
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}
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var checkedClearances = new double[candidatePath.Count];
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double minimumClearance = double.PositiveInfinity;
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for (int index = 0; index < candidatePath.Count; index++)
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{
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SmoothedPathPoint current = candidatePath[index];
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if (!IsValidPoint(current) || Math.Abs(current.VehicleCurvature) > maximumCurvatureMeters + Tolerance)
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{
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reason = "平滑路径包含非法数值或超限车辆曲率。";
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return false;
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}
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var currentPose = new Pose2D(current.X, current.Y, current.Heading);
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if (!_collisionChecker.IsPoseCollisionFree(currentPose, map, vehicle, 0d, out double poseClearance))
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{
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reason = "平滑路径点未通过完整车体碰撞或边界复核。";
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return false;
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}
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checkedClearances[index] = poseClearance;
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minimumClearance = Math.Min(minimumClearance, poseClearance);
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if (index == 0) continue;
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SmoothedPathPoint previous = candidatePath[index - 1];
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if (!IsUnwrappedHeadingContinuous(previous, current))
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{
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reason = "平滑路径展开航向不连续。";
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return false;
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}
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if (IsDuplicatePoseAndArcLength(previous, current))
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{
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if (previous.Direction == current.Direction || !current.IsGearSwitchPoint)
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{
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reason = "相邻重复点不是合法换向对。";
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return false;
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}
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continue;
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}
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if (current.IsGearSwitchPoint || current.ArcLength <= previous.ArcLength + Tolerance)
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{
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reason = "非换向点必须保持正弧长增量，换向点必须保留重复位姿。";
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return false;
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}
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var previousPose = new Pose2D(previous.X, previous.Y, previous.Heading);
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if (!_collisionChecker.IsSweptMotionCollisionFree(previousPose, currentPose, map, vehicle,
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maximumCollisionCheckStepMeters, out double sweptClearance))
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{
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reason = "平滑路径相邻点之间的完整车体扫掠碰撞复核失败。";
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return false;
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}
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checkedClearances[index - 1] = Math.Min(checkedClearances[index - 1], sweptClearance);
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checkedClearances[index] = Math.Min(checkedClearances[index], sweptClearance);
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minimumClearance = Math.Min(minimumClearance, sweptClearance);
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}
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var output = new List<SmoothedPathPoint>(candidatePath.Count);
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for (int index = 0; index < candidatePath.Count; index++)
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{
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SmoothedPathPoint point = candidatePath[index];
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output.Add(new SmoothedPathPoint(
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point.X, point.Y, point.Heading, point.UnwrappedHeading, point.ArcLength, point.Direction,
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point.GeometricCurvature, point.VehicleCurvature, point.VehicleCurvatureDerivative,
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checkedClearances[index], point.IsGearSwitchPoint, point.Source));
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}
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pathWithClearance = new ReadOnlyCollection<SmoothedPathPoint>(output);
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minimumClearanceMeters = minimumClearance;
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return true;
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}
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private static bool TryValidateSegmentTopology(
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IReadOnlyList<SmoothedPathPoint> candidatePath,
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IReadOnlyList<SmoothedPathSegment> candidateSegments,
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PreparedPath originalPath,
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out string reason)
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{
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reason = string.Empty;
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if (originalPath.Segments == null || originalPath.Segments.Count != candidateSegments.Count)
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{
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reason = "平滑路径方向段数量必须保持原始换向拓扑。";
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return false;
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}
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int expectedStartIndex = 0;
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for (int segmentIndex = 0; segmentIndex < candidateSegments.Count; segmentIndex++)
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{
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SmoothedPathSegment candidateSegment = candidateSegments[segmentIndex];
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PreparedDirectionSegment originalSegment = originalPath.Segments[segmentIndex];
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if (candidateSegment == null || originalSegment == null || candidateSegment.SegmentIndex != segmentIndex ||
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candidateSegment.StartIndex != expectedStartIndex || candidateSegment.StartIndex < 0 ||
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candidateSegment.EndIndex < candidateSegment.StartIndex || candidateSegment.EndIndex >= candidatePath.Count ||
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candidateSegment.Direction != originalSegment.Direction ||
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candidateSegment.StartsAtGearSwitch != originalSegment.StartsAtGearSwitch ||
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candidateSegment.EndsAtGearSwitch != originalSegment.EndsAtGearSwitch ||
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originalSegment.Points == null || originalSegment.Points.Count == 0)
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{
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reason = "平滑路径方向段索引、方向或换向拓扑无效。";
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return false;
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}
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SmoothedPathPoint candidateStart = candidatePath[candidateSegment.StartIndex];
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SmoothedPathPoint candidateEnd = candidatePath[candidateSegment.EndIndex];
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SmoothingPoint2D originalStart = originalSegment.Points[0];
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SmoothingPoint2D originalEnd = originalSegment.Points[originalSegment.Points.Count - 1];
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if (!SamePose(candidateStart, originalStart) || !SamePose(candidateEnd, originalEnd) ||
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candidateStart.Direction != originalSegment.Direction || candidateEnd.Direction != originalSegment.Direction ||
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candidateStart.IsGearSwitchPoint != originalStart.IsGearSwitchPoint ||
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candidateEnd.IsGearSwitchPoint != originalEnd.IsGearSwitchPoint)
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{
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reason = "平滑路径改变了原始方向段端点或换向点。";
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return false;
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}
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for (int pointIndex = candidateSegment.StartIndex; pointIndex <= candidateSegment.EndIndex; pointIndex++)
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{
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if (candidatePath[pointIndex] == null || candidatePath[pointIndex].Direction != originalSegment.Direction)
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{
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reason = "平滑路径方向段包含与段方向不一致的点。";
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return false;
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}
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}
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expectedStartIndex = candidateSegment.EndIndex + 1;
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}
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if (expectedStartIndex != candidatePath.Count)
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{
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reason = "平滑路径方向段未完整覆盖候选点。";
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return false;
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}
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return true;
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}
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private static bool IsValidPoint(SmoothedPathPoint point)
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{
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return point != null && NumericGuard.IsFinite(point.X) && NumericGuard.IsFinite(point.Y) &&
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NumericGuard.IsFinite(point.Heading) && NumericGuard.IsFinite(point.UnwrappedHeading) &&
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NumericGuard.IsFinite(point.ArcLength) && point.ArcLength >= 0d &&
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NumericGuard.IsFinite(point.GeometricCurvature) && NumericGuard.IsFinite(point.VehicleCurvature) &&
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NumericGuard.IsFinite(point.VehicleCurvatureDerivative) &&
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IsDirection(point.Direction) && Enum.IsDefined(typeof(SmoothedPathPointSource), point.Source) &&
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Math.Abs(AngleMath.ShortestSignedDifference(point.Heading, AngleMath.NormalizeRadians(point.Heading))) <= Tolerance;
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}
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private static bool SamePose(SmoothedPathPoint candidate, SmoothingPoint2D original)
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{
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return candidate != null && original != null && Math.Abs(candidate.X - original.X) <= Tolerance &&
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Math.Abs(candidate.Y - original.Y) <= Tolerance &&
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Math.Abs(AngleMath.ShortestSignedDifference(candidate.Heading, original.Heading)) <= Tolerance;
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}
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private static bool IsUnwrappedHeadingContinuous(SmoothedPathPoint previous, SmoothedPathPoint current)
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{
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double expectedDelta = AngleMath.ShortestSignedDifference(previous.Heading, current.Heading);
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return NumericGuard.IsFinite(expectedDelta) &&
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Math.Abs((current.UnwrappedHeading - previous.UnwrappedHeading) - expectedDelta) <= Tolerance;
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}
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private static bool IsDuplicatePoseAndArcLength(SmoothedPathPoint previous, SmoothedPathPoint current)
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{
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return Math.Abs(previous.X - current.X) <= Tolerance && Math.Abs(previous.Y - current.Y) <= Tolerance &&
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Math.Abs(AngleMath.ShortestSignedDifference(previous.Heading, current.Heading)) <= Tolerance &&
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Math.Abs(previous.ArcLength - current.ArcLength) <= Tolerance;
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}
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private static bool IsDirection(TravelDirection direction)
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{
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return direction == TravelDirection.Forward || direction == TravelDirection.Reverse;
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}
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private static IReadOnlyList<SmoothedPathPoint> EmptyPath()
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{
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return new ReadOnlyCollection<SmoothedPathPoint>(new List<SmoothedPathPoint>());
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}
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}
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