public Layer CreateBufferLayer(Layer SrcLayer, float BufferRadius)
{
int i;
Layer BufferLayer = new Layer();
Shape SrcShape;
IDictionaryEnumerator dicEnumerator = SrcLayer.GetRecords(SrcLayer.LayerPath + "\\" + SrcLayer.ID).GetEnumerator();
switch (SrcLayer.LayerType)
{
case ShapeType.Point:
case ShapeType.PointCustom:
case ShapeType.PointFeature:
GraphicsPath TempGp = new GraphicsPath();
PointF Pt;
while (dicEnumerator.MoveNext())
{
Shape TempShp = new Shape();
SrcShape = (Shape)dicEnumerator.Value;
Pt = (PointF)SrcShape.Parts[0];
TempShp.AreaId = SrcShape.AreaId;
TempShp.AreaName = SrcShape.AreaName;
TempShp.Centroid = Pt;
PointF[] Pts = GetPointBuffer(Pt, BufferRadius);
TempGp.Reset();
TempGp.AddPolygon(Pts);
TempShp.Extent = TempGp.GetBounds();
TempShp.Parts.Add(Pts);
BufferLayer.Records.Add(TempShp.AreaId, TempShp);
if (BufferLayer.Extent.IsEmpty)
{
BufferLayer.Extent = TempShp.Extent;
}
else
{
BufferLayer.Extent = RectangleF.Union(BufferLayer.Extent, TempShp.Extent);
}
TempShp = null;
}
TempGp.Dispose();
break;
case ShapeType.PolyLine:
case ShapeType.PolyLineCustom:
case ShapeType.PolyLineFeature:
TempGp = new GraphicsPath();
while (dicEnumerator.MoveNext())
{
Shape TempShp = new Shape();
SrcShape = (Shape)dicEnumerator.Value;
TempShp.AreaId = SrcShape.AreaId;
TempShp.AreaName = SrcShape.AreaName;
//TempShp.Centroid = SrcShape.Parts(j)
for (i = 0; i <= SrcShape.Parts.Count - 1; i++)
{
PointF[] Pts = (PointF[])SrcShape.Parts[i];
PointF[] PolyPts = GetLineBuffer(Pts, BufferRadius);
TempShp.Centroid = Pts[(int)Pts.Length / 2];
TempShp.Parts.Add(PolyPts);
TempGp.Reset();
TempGp.AddPolygon(PolyPts);
if (TempShp.Extent.IsEmpty)
{
TempShp.Extent = TempGp.GetBounds();
}
else
{
TempShp.Extent = RectangleF.Union(TempShp.Extent, TempGp.GetBounds());
}
Pts = null;
}
BufferLayer.Records.Add(TempShp.AreaId, TempShp);
if (BufferLayer.Extent.IsEmpty)
{
BufferLayer.Extent = TempShp.Extent;
}
else
{
BufferLayer.Extent = RectangleF.Union(BufferLayer.Extent, TempShp.Extent);
}
TempShp = null;
}
TempGp.Dispose();
break;
}
BufferLayer.LayerType = ShapeType.PolygonBuffer;
BufferLayer.FillColor = Color.FromArgb(40, 255, 0, 0);
BufferLayer.BorderColor = Color.Transparent;
return BufferLayer;
}
