初始

utility/coryUtils/dxfClUtils.go

@@ -0,0 +1,128 @@
+// Package timeutil
+// @Author 铁憨憨[cory] 2025/6/11 20:08:00
+package timeutil
+
+import (
+	"github.com/paulmach/orb"
+	"github.com/paulmach/orb/geo"
+	"github.com/paulmach/orb/planar"
+	"github.com/tiger1103/gfast/v3/api/v1/common/shp"
+	"math"
+)
+
+// 将 Polygon 结构体转换为 [][]float64 格式
+func ConvertPolygonToFloatArray(polygon shp.Polygon) [][]float64 {
+	// 创建结果切片，长度与 Polygon 中的 Positions 相同
+	result := make([][]float64, len(polygon.Positions))
+
+	// 遍历每个 Point 并转换为 []float64
+	for i, point := range polygon.Positions {
+		// 每个点转换为 [经度, 纬度, 高度, 宽度]
+		result[i] = []float64{
+			point.Lng,
+			point.Lat,
+			point.Alt,
+			point.Width,
+		}
+	}
+
+	return result
+}
+
+// 判断点是否在多边形内
+func FanWei(mian [][]float64, dian []float64) bool {
+	if len(mian) < 3 || len(dian) != 2 {
+		return false
+	}
+
+	var ring orb.Ring
+	for _, vertex := range mian {
+		ring = append(ring, orb.Point{vertex[0], vertex[1]})
+	}
+
+	// 闭合环
+	if !ring[0].Equal(ring[len(ring)-1]) {
+		ring = append(ring, ring[0])
+	}
+
+	polygon := orb.Polygon{ring}
+	point := orb.Point{dian[0], dian[1]}
+
+	return planar.PolygonContains(polygon, point)
+}
+
+// 点到线段最近点（投影点）
+func closestPointOnSegment(p, a, b orb.Point) orb.Point {
+	ax, ay := a[0], a[1]
+	bx, by := b[0], b[1]
+	px, py := p[0], p[1]
+
+	abx := bx - ax
+	aby := by - ay
+	apx := px - ax
+	apy := py - ay
+
+	t := (apx*abx + apy*aby) / (abx*abx + aby*aby)
+	if t < 0 {
+		t = 0
+	} else if t > 1 {
+		t = 1
+	}
+
+	return orb.Point{ax + t*abx, ay + t*aby}
+}
+
+// 点到多边形的最近距离（米）
+func PointToPolygonDistance(mian [][]float64, dian []float64) float64 {
+	point := orb.Point{dian[0], dian[1]}
+
+	ring := make(orb.Ring, len(mian))
+	for i, pt := range mian {
+		ring[i] = orb.Point{pt[0], pt[1]}
+	}
+
+	// 闭合多边形
+	if !ring[0].Equal(ring[len(ring)-1]) {
+		ring = append(ring, ring[0])
+	}
+
+	polygon := orb.Polygon{ring}
+
+	if planar.PolygonContains(polygon, point) {
+		return 0
+	}
+
+	minDist := math.MaxFloat64
+	for i := 0; i < len(ring)-1; i++ {
+		proj := closestPointOnSegment(point, ring[i], ring[i+1])
+		dist := geo.Distance(point, proj) // 单位：米
+		if dist < minDist {
+			minDist = dist
+		}
+	}
+	return minDist
+}
+
+// 计算两个经纬度点之间的球面距离（单位：米）
+func PointToPointDistance(p1 []float64, p2 []float64) float64 {
+	point1 := orb.Point{p1[0], p1[1]}
+	point2 := orb.Point{p2[0], p2[1]}
+	return geo.Distance(point1, point2)
+}
+
+//func main() {
+//	polygonVertices := [][]float64{
+//		{106.518314, 29.627223},
+//		{106.519419, 29.627223},
+//		{106.518238, 29.626399},
+//		{106.519491, 29.626435},
+//	}
+//
+//	targetPoint := []float64{117.51, 40.74}
+//
+//	inPolygon := FanWei(polygonVertices, targetPoint)
+//	fmt.Printf("点是否在多边形内：%v\n", inPolygon)
+//
+//	distance := pointToPolygonDistance(polygonVertices, targetPoint)
+//	fmt.Printf("点到多边形的最短距离（单位米）：%.2f m\n", distance)
+//}