feat(area-manager): 优化门区域路段绑定逻辑，支持线段与矩形相交判定

src/services/editor/area-manager.service.ts

@@ -55,8 +55,10 @@ export class AreaManager {
       }
     }
 
-    // 门区域：自动绑定矩形内的路段（采用路段两端点均在区域内的简单判定）
-    if ((type as any) === (DOOR_AREA_TYPE as any)) {
+    // 门区域：自动绑定与矩形相交或端点落入矩形的路段
+    // 原逻辑仅在两端点都在矩形内时绑定；
+    // 现在扩展为：端点都在内 OR 线段与矩形任一边相交，则绑定。
+    if ((type as any) === (DOOR_AREA_TYPE as any)) {
       const areaRect = {
         x: Math.min(p1.x, p2.x),
         y: Math.min(p1.y, p2.y),
@@ -66,7 +68,70 @@ export class AreaManager {
       const isInRect = (x: number, y: number) =>
         x >= areaRect.x && x <= areaRect.x + areaRect.width && y >= areaRect.y && y <= areaRect.y + areaRect.height;
 
-      const allRoutes = this.editor.find('route');
+      // 线段与矩形是否相交（含端点在内）的简易判断：
+      // 1) 任一点在矩形内
+      // 2) 与矩形四条边任意一条有线段相交
+      const segmentIntersectsRect = (
+        x1: number,
+        y1: number,
+        x2: number,
+        y2: number,
+        rx: number,
+        ry: number,
+        rw: number,
+        rh: number,
+      ): boolean => {
+        const xMin = rx;
+        const xMax = rx + rw;
+        const yMin = ry;
+        const yMax = ry + rh;
+
+        const pointInRect = (x: number, y: number) => x >= xMin && x <= xMax && y >= yMin && y <= yMax;
+        if (pointInRect(x1, y1) || pointInRect(x2, y2)) return true;
+
+        // 线段相交判定（跨立实验）
+        const segmentsIntersect = (
+          ax1: number,
+          ay1: number,
+          ax2: number,
+          ay2: number,
+          bx1: number,
+          by1: number,
+          bx2: number,
+          by2: number,
+        ): boolean => {
+          const d = (x: number, y: number, x1: number, y1: number, x2: number, y2: number) =>
+            (x - x1) * (y2 - y1) - (y - y1) * (x2 - x1);
+          const onSegment = (x: number, y: number, x1: number, y1: number, x2: number, y2: number) =>
+            Math.min(x1, x2) <= x && x <= Math.max(x1, x2) && Math.min(y1, y2) <= y && y <= Math.max(y1, y2);
+          const d1 = d(ax1, ay1, bx1, by1, bx2, by2);
+          const d2 = d(ax2, ay2, bx1, by1, bx2, by2);
+          const d3 = d(bx1, by1, ax1, ay1, ax2, ay2);
+          const d4 = d(bx2, by2, ax1, ay1, ax2, ay2);
+          if (((d1 > 0 && d2 < 0) || (d1 < 0 && d2 > 0)) && ((d3 > 0 && d4 < 0) || (d3 < 0 && d4 > 0))) return true;
+          // 共线且端点在线段投影上
+          if (d1 === 0 && onSegment(ax1, ay1, bx1, by1, bx2, by2)) return true;
+          if (d2 === 0 && onSegment(ax2, ay2, bx1, by1, bx2, by2)) return true;
+          if (d3 === 0 && onSegment(bx1, by1, ax1, ay1, ax2, ay2)) return true;
+          if (d4 === 0 && onSegment(bx2, by2, ax1, ay1, ax2, ay2)) return true;
+          return false;
+        };
+
+        // 矩形四条边
+        const leftX = xMin;
+        const rightX = xMax;
+        const topY = yMin;
+        const bottomY = yMax;
+
+        if (segmentsIntersect(x1, y1, x2, y2, leftX, topY, leftX, bottomY)) return true; // 左边
+        if (segmentsIntersect(x1, y1, x2, y2, rightX, topY, rightX, bottomY)) return true; // 右边
+        if (segmentsIntersect(x1, y1, x2, y2, leftX, topY, rightX, topY)) return true; // 上边
+        if (segmentsIntersect(x1, y1, x2, y2, leftX, bottomY, rightX, bottomY)) return true; // 下边
+
+        return false;
+      };
+
+      const allRoutes = this.editor.find('route');
       allRoutes.forEach((r) => {
         const [a1, a2] = r.anchors ?? [];
         if (!a1?.connectTo || !a2?.connectTo) return;
@@ -80,11 +145,22 @@ export class AreaManager {
         const cay = (ra.y ?? 0) + (ra.height ?? 0) / 2;
         const cbx = (rb.x ?? 0) + (rb.width ?? 0) / 2;
         const cby = (rb.y ?? 0) + (rb.height ?? 0) / 2;
-        if (isInRect(cax, cay) && isInRect(cbx, cby)) {
-          routes.push(r.id!);
-        }
-      });
-    }
+        const bothInside = isInRect(cax, cay) && isInRect(cbx, cby);
+        const intersects = segmentIntersectsRect(
+          cax,
+          cay,
+          cbx,
+          cby,
+          areaRect.x,
+          areaRect.y,
+          areaRect.width,
+          areaRect.height,
+        );
+        if (bothInside || intersects) {
+          routes.push(r.id!);
+        }
+      });
+    }
 
     const areaInfo: MapAreaInfo = { type, points, routes };
     if (type === MapAreaType.库区) {