private void finishPart() { if (CurrentEdit < 0 || CurrentEdit > AllLayer.Count()) { return; } List <WEPoint> tem = new List <WEPoint>(); if (NewPoints.Count() != 0) { switch (AllLayer[CurrentEdit].FeatureType) { case FeatureType.WEMultiPoint: case FeatureType.WEEntityPoint: break; case FeatureType.WEEntityPolyline: case FeatureType.WEMultiPolyline: WEMultiPolyline temm = (WEMultiPolyline)(EditFeature.Geometries); WEPolyline temmm = (WEPolyline)temm.Polylines[temm.Polylines.Count() - 1]; //tem.AddRange(temmm.Points); foreach (var i in NewPoints) { tem.Add(WEMapTools.ToMapPoint(i)); } temmm.Points = (WEPoint[])tem.ToArray(); temm.DeletePolyline(temm.Polylines.Count() - 1); temm.Add(temmm); temm.Add(new WEPolyline()); EditFeature.Geometries = temm; NewPoints.Clear(); break; case FeatureType.WEEntityPolygon: case FeatureType.WEMultiPolygon: WEMultiPolygon temm3 = (WEMultiPolygon)(EditFeature.Geometries); WEPolygon temmm3 = (WEPolygon)temm3.Polygons[temm3.Polygons.Count() - 1]; //tem.AddRange(temmm3.Points); foreach (var i in NewPoints) { tem.Add(WEMapTools.ToMapPoint(i)); } temmm3.Points = (WEPoint[])tem.ToArray(); temm3.DeletePolygon(temm3.Polygons.Count() - 1); temm3.Add(temmm3); temm3.Add(new WEPolygon()); EditFeature.Geometries = temm3; NewPoints.Clear(); break; default: throw new Exception("不能识别的图层类型"); } } else { System.Media.SystemSounds.Beep.Play(); } }
/// <summary> /// 判断复合多边形是否部分或者完全位于矩形盒内 /// </summary> /// <returns></returns> public static bool IsMultiPolygonPartiallyWithinBox(WEMultiPolygon multiPolygon, WERectangle box) { WERectangle multipolygonBox = multiPolygon.MBR; //矩形盒不相交 if (!IsTwoBoxesIntersect(multipolygonBox, box)) { return(false); } int sPolygonCount = multiPolygon.Polygons.Count(); for (int j = 0; j < sPolygonCount; j++) //遍历每个简单多边形判断是否有顶点位于矩形盒内 { WEPolygon thisPolygon = (WEPolygon)multiPolygon.GetPolygon(j); int sPointCount = thisPolygon.PointCount; for (int i = 0; i < sPointCount; i++) { if (IsPointInBox(thisPolygon.Points[i], box)) { return(true); } } } WEPoint LeftTop = new WEPoint(box.MinX, box.MaxY); WEPoint LeftBottom = new WEPoint(box.MinX, box.MinY); WEPoint RightTop = new WEPoint(box.MaxX, box.MaxY); WEPoint RightBottom = new WEPoint(box.MaxX, box.MinY); //判断矩形盒是否有顶点位于复合多边形内 if (IsPointInMultiPolygon(LeftTop, multiPolygon) || IsPointInMultiPolygon(LeftBottom, multiPolygon) || IsPointInMultiPolygon(RightBottom, multiPolygon) || IsPointInMultiPolygon(RightTop, multiPolygon)) { return(true); } for (int j = 0; j < sPolygonCount; j++) //遍历每个简单多边形判断是否有边与矩形盒相交 { WEPolygon thisPolygon = (WEPolygon)multiPolygon.GetPolygon(j); int sPointCount = thisPolygon.PointCount; WEPoint startPoint, endPoint; for (int i = 0; i < sPointCount - 1; i++) { startPoint = thisPolygon.Points[i]; endPoint = thisPolygon.Points[i + 1]; if (IsSegmentIntersectsBox(startPoint, endPoint, box)) { return(true); } } startPoint = thisPolygon.Points[sPointCount - 1]; endPoint = thisPolygon.Points[0]; if (IsSegmentIntersectsBox(startPoint, endPoint, box)) { return(true); } } return(false); }
/// <summary> /// 判断点是否在简单多边形内 /// </summary> /// <param name="point"></param> /// <param name="polygon"></param> /// <returns></returns> public static bool IsPointInPolygon(WEPoint point, WEPolygon polygon, double tolerance = 0.1) { WERectangle box = polygon.MBR; if (!IsPointInBox(point, box)) { return(false); } int sPointCount = polygon.PointCount; int sIntersectionCount = 0; //射线与边的交点数 WEPoint startPoint, endPoint; //线段起点、终点 for (int i = 0; i < sPointCount - 1; i++) { startPoint = polygon.Points[i]; endPoint = polygon.Points[i + 1]; if (IsRayIntersectsSegment(point, startPoint, endPoint)) { sIntersectionCount++; } } startPoint = polygon.Points[sPointCount - 1]; endPoint = polygon.Points[0]; if (IsRayIntersectsSegment(point, startPoint, endPoint)) //最后一条边 { sIntersectionCount++; } if (sIntersectionCount % 2 == 1) //奇数个交点 { return(true); } if (tolerance > 0) { //对每条边判断点是否在一定容限内位于边上 for (int i = 0; i < sPointCount - 1; i++) { startPoint = polygon.Points[i]; endPoint = polygon.Points[i + 1]; if (GetDistanceFromPointToSegment(point, startPoint, endPoint) <= Tolerance) { return(true); } } startPoint = polygon.Points[sPointCount - 1]; endPoint = polygon.Points[0]; if (GetDistanceFromPointToSegment(point, startPoint, endPoint) < Tolerance) { return(true); } } return(false); }
/// <summary> /// 判断简单多边形是否部分或者完全位于矩形盒内 /// </summary> /// <returns></returns> public static bool IsPolygonPartiallyWithinBox(WEPolygon polygon, WERectangle box) { WERectangle polygonBox = polygon.MBR; if (!IsTwoBoxesIntersect(polygonBox, box)) //矩形盒不相交 { return(false); } int sPointCount = polygon.PointCount; for (int i = 0; i < sPointCount; i++) //多边形是否有顶点位于矩形盒内 { if (IsPointInBox(polygon.Points[i], box)) { return(true); } } WEPoint LeftTop = new WEPoint(box.MinX, box.MaxY); WEPoint LeftBottom = new WEPoint(box.MinX, box.MinY); WEPoint RightTop = new WEPoint(box.MaxX, box.MaxY); WEPoint RightBottom = new WEPoint(box.MaxX, box.MinY); if (IsPointInPolygon(LeftTop, polygon) || IsPointInPolygon(LeftBottom, polygon) || IsPointInPolygon(RightTop, polygon) || IsPointInPolygon(RightBottom, polygon)) //矩形盒是否有顶点位于多边形内 { return(true); } //简单多边形与矩形盒的边是否有交点 WEPoint startPoint, endPoint; for (int i = 0; i < sPointCount - 1; i++) { startPoint = polygon.Points[i]; endPoint = polygon.Points[i + 1]; if (IsSegmentIntersectsBox(startPoint, endPoint, box)) { return(true); } } startPoint = polygon.Points[sPointCount - 1]; //最后一条边 endPoint = polygon.Points[0]; if (IsSegmentIntersectsBox(startPoint, endPoint, box)) { return(true); } return(false); }
/// <summary> /// 判断点是否在复合多边形内 /// </summary> /// <param name="point"></param> /// <param name="multiPolygon"></param> /// <returns></returns> public static bool IsPointInMultiPolygon(WEPoint point, WEMultiPolygon multiPolygon) { WERectangle box = multiPolygon.MBR; if (!IsPointInBox(point, box)) { return(false); } int sPolygonCount = multiPolygon.Polygons.Count(); int sIntersectionCount = 0; //射线与边的交点数 for (int j = 0; j < sPolygonCount; j++) //遍历每个简单多边形求射线交点个数 { WEPolygon thisPolygon = (WEPolygon)multiPolygon.GetPolygon(j); if (thisPolygon.PointCount < 3) { continue; } int sPointCount = thisPolygon.PointCount; WEPoint startPoint, endPoint; //线段起点、终点 for (int i = 0; i < sPointCount - 1; i++) { startPoint = thisPolygon.Points[i]; endPoint = thisPolygon.Points[i + 1]; if (IsRayIntersectsSegment(point, startPoint, endPoint)) { sIntersectionCount++; } } startPoint = thisPolygon.Points[sPointCount - 1]; endPoint = thisPolygon.Points[0]; if (IsRayIntersectsSegment(point, startPoint, endPoint)) //最后一条边 { sIntersectionCount++; } } if (sIntersectionCount % 2 == 1) //奇数个交点 { return(true); } return(false); }
//鼠标移动 private void WEMapControl_MouseMove(object sender, MouseEventArgs e) { if (WEMouseMove != null) { WEMouseMove(this, e.Location); } switch (MapOpStyle) { case 0: break; case 1: //放大 if (e.Button == MouseButtons.Left) { Refresh(); Graphics g = Graphics.FromHwnd(this.Handle); Pen sBoxPen = new Pen(mcSelectingBoxColor, mcSelectingBoxWidth); float sMinX = Math.Min(mStartPoint.X, e.Location.X); float sMinY = Math.Min(mStartPoint.Y, e.Location.Y); float sMaxX = Math.Max(mStartPoint.X, e.Location.X); float sMaxY = Math.Max(mStartPoint.Y, e.Location.Y); g.DrawRectangle(sBoxPen, sMinX, sMinY, sMaxX - sMinX, sMaxY - sMinY); g.Dispose(); } break; case 2: //缩小 if (e.Button == MouseButtons.Left) { Refresh(); Graphics g = Graphics.FromHwnd(this.Handle); Pen sBoxPen = new Pen(mcSelectingBoxColor, mcSelectingBoxWidth); float sMinX = Math.Min(mStartPoint.X, e.Location.X); float sMinY = Math.Min(mStartPoint.Y, e.Location.Y); float sMaxX = Math.Max(mStartPoint.X, e.Location.X); float sMaxY = Math.Max(mStartPoint.Y, e.Location.Y); g.DrawRectangle(sBoxPen, sMinX, sMinY, sMaxX - sMinX, sMaxY - sMinY); g.Dispose(); } break; case 3: //漫游 if (e.Button == MouseButtons.Left) { //PointF sPreMouseLocation = new PointF(mStartPoint.X, mStartPoint.Y); //WEPoint sPrePoint = WEMapTools.ToMapPoint(sPreMouseLocation); WEPoint sPrePoint = WEMapTools.ToMapPoint(mStartPoint); //PointF sCurMouseLocation = new PointF(e.Location.X, e.Location.Y); //WEPoint sCurPoint = WEMapTools.ToMapPoint(sCurMouseLocation); WEPoint sCurPoint = WEMapTools.ToMapPoint(e.Location); WEPoint offset = WEMapTools.ToMapPoint(new PointF(e.Location.X - mStartPoint.X, e.Location.Y - mStartPoint.Y)); //修改offset double mOffsetX = sPrePoint.X - sCurPoint.X; double mOffsetY = sPrePoint.Y - sCurPoint.Y; WERectangle newRect = new WERectangle(WEMapTools.DisplayMBR.MinX + mOffsetX, WEMapTools.DisplayMBR.MaxX + mOffsetX, WEMapTools.DisplayMBR.MinY + mOffsetY, WEMapTools.DisplayMBR.MaxY + mOffsetY); WEMapTools.DisplayMBR = newRect; ZoomByMBR(WEMapTools.DisplayMBR); mStartPoint = e.Location; /* * //修改offset * mOffsetX = (mStartPoint.X - e.Location.X) * WEMapTools.DisplayMBR.Width / WEMapTools.DisplayWidth; * mOffsetY = (e.Location.Y - mStartPoint.Y) * WEMapTools.DisplayMBR.Height / WEMapTools.DisplayHeight; * newRect = new WERectangle(WEMapTools.DisplayMBR.MinX + mOffsetX, WEMapTools.DisplayMBR.MaxX + mOffsetX, * WEMapTools.DisplayMBR.MinY + mOffsetY, WEMapTools.DisplayMBR.MaxY + mOffsetY); * WEMapTools.DisplayMBR = newRect; * ZoomByMBR(WEMapTools.DisplayMBR); * mStartPoint.X = e.Location.X; * mStartPoint.Y = e.Location.Y; */ } break; case 4: mStartPoint = e.Location; List <WEPoint> tem = new List <WEPoint>(); if (CurrentEdit < 0 || CurrentEdit > AllLayer.Count()) { break; } if (NodeEdit == 0) { switch (AllLayer[CurrentEdit].FeatureType) { case FeatureType.WEMultiPoint: case FeatureType.WEEntityPoint: if (NewPoints.Count() != 0) { NewPoints[0] = e.Location; EditFeature.Geometries = new WEMultiPoint(new WEPoint[1] { WEMapTools.ToMapPoint(NewPoints[0]) }); } else { NewPoints.Add(e.Location); } //NewPoints.Clear(); //EditFeature = AllLayer[CurrentEdit].Features.Last(); //AllLayer[CurrentEdit].Features[AllLayer[CurrentEdit].Features.Count() - 1].Geometries = new WEMultiPoint(new WEGeometry[1] { }); break; case FeatureType.WEEntityPolyline: case FeatureType.WEMultiPolyline: NewPoints.Add(e.Location); WEMultiPolyline temm = (WEMultiPolyline)(EditFeature.Geometries); WEPolyline temmm = (WEPolyline)temm.Polylines[temm.Polylines.Count() - 1]; //tem.AddRange(temmm.Points); foreach (var i in NewPoints) { tem.Add(WEMapTools.ToMapPoint(i)); } temmm.Points = (WEPoint[])tem.ToArray(); temm.DeletePolyline(temm.Polylines.Count() - 1); temm.Add(temmm); EditFeature.Geometries = temm; NewPoints.RemoveAt(NewPoints.Count - 1); break; case FeatureType.WEEntityPolygon: case FeatureType.WEMultiPolygon: NewPoints.Add(e.Location); WEMultiPolygon temm3 = (WEMultiPolygon)(EditFeature.Geometries); WEPolygon temmm3 = (WEPolygon)temm3.Polygons[temm3.Polygons.Count() - 1]; //tem.AddRange(temmm3.Points); foreach (var i in NewPoints) { tem.Add(WEMapTools.ToMapPoint(i)); } temmm3.Points = (WEPoint[])tem.ToArray(); temm3.DeletePolygon(temm3.Polygons.Count() - 1); temm3.Add(temmm3); EditFeature.Geometries = temm3; NewPoints.RemoveAt(NewPoints.Count - 1); break; } Refresh(); } else if (EditFeature.Geometries.PointCount != 0) { CursorMap = WEMapTools.ToMapPoint(e.Location); switch (EditFeature.FeatureType) { case FeatureType.WEMultiPoint: case FeatureType.WEEntityPoint: isGravitationCaptured = -1; for (int i = 0; i < EditFeature.Geometries.PointCount; i++) { WEPoint poi = (WEPoint)((WEMultiPoint)EditFeature.Geometries).Points[i]; if (WEMapTools.IsPointOnPoint(CursorMap, poi)) { isGravitationCaptured = i; break; } } break; case FeatureType.WEEntityPolyline: case FeatureType.WEMultiPolyline: isGravitationCaptured = -1; for (int i = 0; i < EditFeature.Geometries.PointCount; i++) { WEPolyline polyline = (WEPolyline)((WEMultiPolyline)EditFeature.Geometries).Polylines[i]; for (int j = 0; j < polyline.PointCount; j++) { if (WEMapTools.IsPointOnPoint(CursorMap, polyline.Points[j])) { isGravitationCaptured = j; break; } } if (isGravitationCaptured != -1) { helpGravitationCaptured = i; break; } if (polyline.PointCount == 1) { continue; } for (int j = 1; j < polyline.PointCount; j++) { if (WEMapTools.IsPointOnPolyline(CursorMap, new WEPolyline(new WEPoint[2] { polyline.Points[j], polyline.Points[j - 1] }))) { ; } { isGravitationCaptured = j; break; } } if (isGravitationCaptured != -1) { helpGravitationCaptured = -i; break; } } break; case FeatureType.WEEntityPolygon: case FeatureType.WEMultiPolygon: isGravitationCaptured = -1; for (int i = 0; i < EditFeature.Geometries.PointCount; i++) { WEPolygon polygon = (WEPolygon)((WEMultiPolyline)EditFeature.Geometries).Polylines[i]; for (int j = 0; j < polygon.PointCount; j++) { if (WEMapTools.IsPointOnPoint(CursorMap, polygon.Points[j])) { isGravitationCaptured = j; break; } } if (isGravitationCaptured != -1) { helpGravitationCaptured = i; break; } if (polygon.PointCount == 1) { continue; } for (int j = 1; j < polygon.PointCount; j++) { if (WEMapTools.IsPointOnPolyline(CursorMap, new WEPolyline(new WEPoint[2] { polygon.Points[j], polygon.Points[j - 1] }))) { ; } { isGravitationCaptured = j; break; } } if (WEMapTools.IsPointOnPolyline(CursorMap, new WEPolyline(new WEPoint[2] { polygon.Points.Last(), polygon.Points.First() }))) { ; } isGravitationCaptured = polygon.PointCount; if (isGravitationCaptured != -1) { helpGravitationCaptured = -i; break; } } break; default: isGravitationCaptured = -1; break; } if (isGravitationCaptured != -1) { Cursor = Cursors.SizeAll; using (Graphics g = Graphics.FromHwnd(this.Handle)) { g.FillRectangle(new SolidBrush(Color.Black), 0, 0, 100, 100); } } else { Cursor = Cursors.Cross; } } if (isGravitationCaptured != -1) { } break; case 5: //选择要素 if (e.Button == MouseButtons.Left) { Refresh(); Graphics g = Graphics.FromHwnd(this.Handle); Pen sBoxPen = new Pen(mcSelectingBoxColor, mcSelectingBoxWidth); float sMinX = Math.Min(mStartPoint.X, e.Location.X); float sMinY = Math.Min(mStartPoint.Y, e.Location.Y); float sMaxX = Math.Max(mStartPoint.X, e.Location.X); float sMaxY = Math.Max(mStartPoint.Y, e.Location.Y); g.DrawRectangle(sBoxPen, sMinX, sMinY, sMaxX - sMinX, sMaxY - sMinY); g.Dispose(); } break; default: mStartPoint = e.Location; break; } }