public List <Feature> GetHitObjects(RgPoint point, double tolerance)
{
List <Feature> selected = new List <Feature>();
if (this.Visible == false)
{
return(null);
}
foreach (Feature drawobject in mGeometries)
{
if (ShapeType == RgEnumShapeType.RgPoint)
{
RgPoint pt = drawobject.Shape as RgPoint;
if (RDistanceMeasure.Dist_Point_to_Point(pt, point) < tolerance)
{
selected.Add(drawobject);
// drawobject.IsSelected = true;
}
}
else if (ShapeType == RgEnumShapeType.RgLineString)
{
LineString lineString = drawobject.Shape as LineString;
if (lineString.PointInObject(point))
{
selected.Add(drawobject);
//drawobject.IsSelected = true;
}
}
else if (ShapeType == RgEnumShapeType.RgPolygon)
{
Polygon polygon = drawobject.Shape as Polygon;
if (!polygon.IsEmpty())
{
if (Geometries.RgTopologicRelationship.IsInPolygon(point, polygon))
{
selected.Add(drawobject);
//drawobject.IsSelected = true;
}
}
}
}
return(selected);
}
/// <summary>
/// 几何对象集合执行的获取捕捉点的方法
/// </summary>
/// <param name="canvas"></param>
/// <param name="point"></param>
/// <param name="runningsnaptypes"></param>
/// <param name="usersnaptype"></param>
/// <returns></returns>
public ISnapPoint SnapPoint(RgPoint point, Type[] runningsnaptypes, Type usersnaptype)
{
for (int i = 0; i < Layers.Count; i++)
{
ILayer lry = Layers[i];
if (lry is FetureLayer)
{
FetureLayer featlyr = lry as FetureLayer;
List <Feature> objects = featlyr.GetHitObjects(point, tolerance);
if (objects.Count == 0)
{
return(null);
}
foreach (Feature obj in objects)
{
IGeometry geo = obj.Shape as IGeometry;
if (geo is RgPoint)
{
RgPoint pt = geo as RgPoint;
if (RDistanceMeasure.Dist_Point_to_Point(pt, point) < tolerance)
{
return(new SnapPointBase(pt, pt));
}
// ISnapPoint snap = obj.SnapPoint(point, objects, runningsnaptypes, usersnaptype);
}
if (geo is LinearRing)
{
}
if (geo is Polygon)
{
}
// ISnapPoint snap = obj.SnapPoint( point, objects, runningsnaptypes, usersnaptype);
//if (snap != null)
// return snap;
}
}
}
return(null);
}