From 7a164e24123df74c3228324e4a398b79cb9c12b6 Mon Sep 17 00:00:00 2001
From: liusuyi <1951119284@qq.com>
Date: Fri, 12 Dec 2025 14:37:17 +0800
Subject: [PATCH] 增加禁飞区距离计算
---
ard-system/src/main/java/com/ard/data/noflyzone/utils/NoFlyZoneUtils.java | 78 +++++++++++++++++++++++++++++++++++++++
1 files changed, 78 insertions(+), 0 deletions(-)
diff --git a/ard-system/src/main/java/com/ard/data/noflyzone/utils/NoFlyZoneUtils.java b/ard-system/src/main/java/com/ard/data/noflyzone/utils/NoFlyZoneUtils.java
index ea09a5a..e37cba3 100644
--- a/ard-system/src/main/java/com/ard/data/noflyzone/utils/NoFlyZoneUtils.java
+++ b/ard-system/src/main/java/com/ard/data/noflyzone/utils/NoFlyZoneUtils.java
@@ -15,6 +15,72 @@
public class NoFlyZoneUtils {
+
+ /**
+ * 计算点到多边形的最近距离
+ */
+ public static double pointToPolygonDistance(Vertex point, List<Vertex> polygon) {
+
+ // 如果在多边形内部，距离为 0
+ if (isPointInPolygon(point, polygon)) {
+ return 0;
+ }
+
+ double minDistance = Double.MAX_VALUE;
+ int n = polygon.size();
+
+ for (int i = 0; i < n; i++) {
+ Vertex a = polygon.get(i);
+ Vertex b = polygon.get((i + 1) % n); // 下一点，最后一条边连接第一个点
+
+ double dist = pointToSegmentDistance(point, a, b);
+ minDistance = Math.min(minDistance, dist);
+ }
+
+ return minDistance;
+ }
+
+ /**
+ * 计算点到线段的距离
+ */
+ public static double pointToSegmentDistance(Vertex p, Vertex a, Vertex b) {
+ double x = p.x, y = p.y;
+ double x1 = a.x, y1 = a.y;
+ double x2 = b.x, y2 = b.y;
+
+ double dx = x2 - x1;
+ double dy = y2 - y1;
+
+ if (dx == 0 && dy == 0) {
+ // A 和 B 是同一个点
+ dx = x - x1;
+ dy = y - y1;
+ return Math.sqrt(dx * dx + dy * dy);
+ }
+
+ // 投影参数 t（0-1之间表示在线段内部）
+ double t = ((x - x1) * dx + (y - y1) * dy) / (dx * dx + dy * dy);
+
+ if (t < 0) {
+ // 最近点是 A
+ dx = x - x1;
+ dy = y - y1;
+ } else if (t > 1) {
+ // 最近点是 B
+ dx = x - x2;
+ dy = y - y2;
+ } else {
+ // 最近点在线段中间
+ double projX = x1 + t * dx;
+ double projY = y1 + t * dy;
+ dx = x - projX;
+ dy = y - projY;
+ }
+
+ return Math.sqrt(dx * dx + dy * dy);
+ }
+
+
/**
* 判断点是否在多边形内（射线法）
*/
@@ -80,6 +146,18 @@
/**
+ * 判断点是否在矩形内
+ */
+ public static boolean isInsideBox(Vertex point, ArdNoFlyBox box) {
+ if (point == null || box == null) return false;
+ return point.x >= box.getMinx() &&
+ point.x <= box.getMaxx() &&
+ point.y >= box.getMiny() &&
+ point.y <= box.getMaxy();
+ }
+
+
+ /**
* 根据 GeoJSON（FeatureCollection）计算外接矩形
*/
@SuppressWarnings("unchecked")
--
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