| | |
| | | package lujing; |
| | | |
| | | import java.util.*; |
| | | import java.util.Set; |
| | | import java.util.HashSet; |
| | | |
| | | /** |
| | | * 异形草地路径规划 - 凹多边形兼容优化版 V5.0 |
| | |
| | | } |
| | | |
| | | private static List<PathSegment> generateGlobalScanPath(List<Point> polygon, double width, double angle, Point currentPos) { |
| | | // 先尝试将凹陷处视为两个独立区域,分两次扫描,避免跨区直线连接 |
| | | List<PathSegment> all = new ArrayList<>(); |
| | | // 第一次扫描:优先处理左侧区域(groupIndex=0) |
| | | List<PathSegment> leftScan = generateScanPathForSide(polygon, width, angle, currentPos, 0); |
| | | all.addAll(leftScan); |
| | | Point posAfterLeft = leftScan.isEmpty() ? currentPos : leftScan.get(leftScan.size() - 1).end; |
| | | // 第二次扫描:处理右侧区域(groupIndex=1),从左侧结束点沿边界到右侧首段 |
| | | List<PathSegment> rightScan = generateScanPathForSide(polygon, width, angle, posAfterLeft, 1); |
| | | all.addAll(rightScan); |
| | | return all; |
| | | } |
| | | |
| | | // 仅扫描指定侧(同一条扫描线的第 groupIndex 段),用于将“耳朵”视为独立区域 |
| | | private static List<PathSegment> generateScanPathForSide(List<Point> polygon, double width, double angle, Point currentPos, int sideIndex) { |
| | | List<PathSegment> segments = new ArrayList<>(); |
| | | List<Point> rotatedPoly = new ArrayList<>(); |
| | | for (Point p : polygon) rotatedPoly.add(rotatePoint(p, -angle)); |
| | |
| | | } |
| | | |
| | | boolean leftToRight = true; |
| | | // 步长 y 从最小到最大扫描 |
| | | boolean firstSegmentConnected = false; |
| | | |
| | | for (double y = minY + width/2; y <= maxY - width/2; y += width) { |
| | | List<Double> xIntersections = getXIntersections(rotatedPoly, y); |
| | | if (xIntersections.size() < 2) continue; |
| | | Collections.sort(xIntersections); |
| | | |
| | | // 处理凹多边形:每两个点组成一个有效作业段 |
| | | // 构建本行的作业段(左到右)和组索引 |
| | | List<PathSegment> lineSegmentsInRow = new ArrayList<>(); |
| | | for (int i = 0; i < xIntersections.size() - 1; i += 2) { |
| | | List<Integer> groupIndices = new ArrayList<>(); |
| | | for (int i = 0, g = 0; i < xIntersections.size() - 1; i += 2, g++) { |
| | | Point pS = rotatePoint(new Point(xIntersections.get(i), y), angle); |
| | | Point pE = rotatePoint(new Point(xIntersections.get(i + 1), y), angle); |
| | | lineSegmentsInRow.add(new PathSegment(pS, pE, true)); |
| | | groupIndices.add(g); |
| | | } |
| | | |
| | | // 根据当前S型方向排序作业段 |
| | | if (!leftToRight) { |
| | | Collections.reverse(lineSegmentsInRow); |
| | | Collections.reverse(groupIndices); |
| | | for (PathSegment s : lineSegmentsInRow) { |
| | | Point temp = s.start; s.start = s.end; s.end = temp; |
| | | } |
| | | } |
| | | |
| | | // 将作业段连接到总路径 |
| | | for (PathSegment s : lineSegmentsInRow) { |
| | | if (Math.hypot(currentPos.x - s.start.x, currentPos.y - s.start.y) > 0.01) { |
| | | // 如果间距大于1cm,添加空走路径 |
| | | addSafeConnection(segments, currentPos, s.start, polygon); |
| | | } |
| | | segments.add(s); |
| | | currentPos = s.end; |
| | | int idxInRow = groupIndices.indexOf(sideIndex); |
| | | if (idxInRow == -1) { |
| | | // 本行不包含该侧的作业段,跳过 |
| | | leftToRight = !leftToRight; |
| | | continue; |
| | | } |
| | | |
| | | PathSegment s = lineSegmentsInRow.get(idxInRow); |
| | | // 首次连接或跨区连接均强制沿边界,避免穿越凹陷区 |
| | | if (Math.hypot(currentPos.x - s.start.x, currentPos.y - s.start.y) > 0.01) { |
| | | addBoundaryConnection(segments, currentPos, s.start, polygon); |
| | | firstSegmentConnected = true; |
| | | } |
| | | segments.add(s); |
| | | currentPos = s.end; |
| | | leftToRight = !leftToRight; |
| | | } |
| | | return segments; |
| | |
| | | } |
| | | } |
| | | |
| | | // 强制沿边界绕行的连接(不做直线安全判断),用来在同一扫描行的多个作业段之间跳转 |
| | | private static void addBoundaryConnection(List<PathSegment> segments, Point start, Point end, List<Point> polygon) { |
| | | List<Point> path = getBoundaryPath(start, end, polygon); |
| | | for (int i = 0; i < path.size() - 1; i++) { |
| | | segments.add(new PathSegment(path.get(i), path.get(i+1), false)); |
| | | } |
| | | } |
| | | |
| | | private static boolean isSegmentSafe(Point p1, Point p2, List<Point> polygon) { |
| | | Point mid = new Point((p1.x + p2.x) / 2, (p1.y + p2.y) / 2); |
| | | if (!isPointInPolygon(mid, polygon)) return false; |
| | |
| | | } |
| | | |
| | | private static int getEdgeIndex(Point p, List<Point> poly) { |
| | | int bestIdx = -1; |
| | | double minD = Double.MAX_VALUE; |
| | | for (int i = 0; i < poly.size(); i++) { |
| | | Point p1 = poly.get(i); |
| | | Point p2 = poly.get((i + 1) % poly.size()); |
| | | if (distToSegment(p, p1, p2) < 1e-3) return i; |
| | | double d = distToSegment(p, p1, p2); |
| | | if (d < minD) { |
| | | minD = d; |
| | | bestIdx = i; |
| | | } |
| | | } |
| | | return -1; |
| | | // 只要找到最近的边即可,放宽阈值以应对浮点误差和旋转变形 |
| | | // 如果距离过大(例如超过1米),可能确实不在边界上,但在路径规划上下文中, |
| | | // 这些点是由扫描线生成的,理论上一定在边界上,所以强制吸附是安全的。 |
| | | return minD < 1.0 ? bestIdx : -1; |
| | | } |
| | | |
| | | private static double distToSegment(Point p, Point s, Point e) { |