/// <summary>
/// Creates a MapWinGIS.Shape object from the point data specified by the user.
/// </summary>
/// <returns>Returns a MapWinGIS.Shape object.</returns>
public MapWinGIS.Shape ToMWShape(MapWinGIS.ShpfileType type)
{
if (m_Points.Count == 0)
{
return(null);
}
MapWinGIS.Shape shp = new MapWinGIS.ShapeClass();
MapWinGIS.Point pnt;
int partNum = 0;
int pointIndex = 0;
bool bres;
bres = shp.Create(type);
bres = shp.InsertPart(0, ref partNum);
for (int i = 0; i < m_Points.Count; i++)
{
pnt = new MapWinGIS.PointClass();
pnt.x = ((PointD)m_Points[i]).x;
pnt.y = ((PointD)m_Points[i]).y;
pointIndex = i;
bres = shp.InsertPoint(pnt, ref pointIndex);
pnt = null;
}
return(shp);
}
/// <summary>
/// Creates one multi-part polygon out of two input polygons.
/// </summary>
/// <param name="poly1">The first polygon to be combined.</param>
/// <param name="poly2">The second polygon to be combined.</param>
/// <param name="resultShp">The resulting multi-part polygon.</param>
/// <returns>True if combining was successful, false otherwise.</returns>
private static bool CombinePolygons(ref MapWinGIS.Shape poly1, ref MapWinGIS.Shape poly2, out MapWinGIS.Shape resultShp)
{
int p1NumParts = poly1.NumParts;
if (p1NumParts == 0)
{
p1NumParts = 1;
}
int p2NumParts = poly2.NumParts;
if (p2NumParts == 0)
{
p2NumParts = 1;
}
MapWinGIS.Shape multiShp = new MapWinGIS.ShapeClass();
multiShp.Create(poly1.ShapeType);
int partIndex = 0;
int pointIndex = 0;
int numPoints = poly1.numPoints;
int begPart = 0;
int endPart = numPoints;
//deal with the first shape and all of its parts
// Globals.Vertex[][] p1VertArray = new Globals.Vertex[p1NumParts][];
// Globals.ConvertPolyToVertexArray(ref poly1, out p1VertArray);
//bool firstIsClockwise = Globals.IsClockwise(ref p1VertArray[0]);
for (int i = 0; i <= p1NumParts - 1; i++)
{
partIndex = i;
pointIndex = multiShp.numPoints;
multiShp.InsertPart(pointIndex, ref partIndex);
begPart = poly1.get_Part(i);
if (i < p1NumParts - 1)
{
endPart = poly1.get_Part(i + 1);
}
else
{
endPart = poly1.numPoints;
}
// if(firstIsClockwise)
// {
//add part
for (int j = begPart; j <= endPart - 1; j++)
{
pointIndex = multiShp.numPoints;
multiShp.InsertPoint(poly1.get_Point(j), ref pointIndex);
}
// }
// else
// {
// //add part in reverse order
// for(int j = endPart-1; j >= begPart; j--)
// {
// pointIndex = multiShp.numPoints;
// multiShp.InsertPoint(poly1.get_Point(j), ref pointIndex);
// }
// }
} //end of adding poly1 and all of its parts to the result shape
//deal with the second shape and all of its parts
// Globals.Vertex[][] p2VertArray = new Globals.Vertex[p2NumParts][];
// Globals.ConvertPolyToVertexArray(ref poly2, out p2VertArray);
// bool secondIsClockwise = Globals.IsClockwise(ref p2VertArray[0]);
partIndex++;
numPoints = poly2.numPoints;
begPart = 0;
endPart = numPoints;
for (int i = 0; i <= p2NumParts - 1; i++)
{
partIndex += i;
pointIndex = multiShp.numPoints;
multiShp.InsertPart(pointIndex, ref partIndex);
begPart = poly2.get_Part(i);
if (i < p2NumParts - 1)
{
endPart = poly2.get_Part(i + 1);
}
else
{
endPart = poly2.numPoints;
}
// if(secondIsClockwise)
// {
for (int j = begPart; j <= endPart - 1; j++)
{
pointIndex = multiShp.numPoints;
multiShp.InsertPoint(poly2.get_Point(j), ref pointIndex);
}
// }
// else
// {
// for(int j = endPart-1; j >= begPart; j--)
// {
// pointIndex = multiShp.numPoints;
// multiShp.InsertPoint(poly2.get_Point(j), ref pointIndex);
// }
// }
} //end of inserting parts from the second shape
resultShp = multiShp;
if (resultShp.numPoints > 0)
{
return(true);
}
else
{
gErrorMsg = "Error occured while trying to combine parts. No points in result shape.";
Debug.WriteLine(gErrorMsg);
Error.SetErrorMsg(gErrorMsg);
MapWinUtility.Logger.Dbg(gErrorMsg);
return(false);
}
}