private System.Drawing.Point[] getScreenPoints(Shapefile_Point[] sourcePoints, int offset, int length, GeographicBoundingBox dstBB, Size dstImageSize)
{
double degreesPerPixelX = (dstBB.East - dstBB.West) / (double)dstImageSize.Width;
double degreesPerPixelY = (dstBB.North - dstBB.South) / (double)dstImageSize.Height;
ArrayList screenPointList = new ArrayList();
for(int i = offset; i < offset + length; i++)
{
double screenX = (sourcePoints[i].X - dstBB.West) / degreesPerPixelX;
double screenY = (dstBB.North - sourcePoints[i].Y) / degreesPerPixelY;
if(screenPointList.Count > 0)
{
Point v = (Point)screenPointList[screenPointList.Count - 1];
if(v.X == (int)screenX && v.Y == (int)screenY)
{
continue;
}
}
screenPointList.Add(new Point((int)screenX, (int)screenY));
}
if(screenPointList.Count <= 1)
return new Point[] { new Point(0,0), new Point(0,0) };
return (Point[])screenPointList.ToArray(typeof(Point));
}
public override void Initialize(DrawArgs drawArgs)
{
try
{
m_Sprite = new Sprite(drawArgs.device);
if(m_IconFilePath != null && File.Exists(m_IconFilePath))
{
m_IconTexture = ImageHelper.LoadIconTexture(m_IconFilePath);
m_IconTextureDescription = m_IconTexture.GetLevelDescription(0);
}
if(m_ShapeFilePath.ToLower().EndsWith(".zip"))
{
loadZippedShapeFile(m_ShapeFilePath);
}
else
{
loadShapeFile(m_ShapeFilePath);
}
if((m_ShapeTileArgs.ShowLabels && m_ShapeTileArgs.DataKey != null) || m_IconTexture != null)
{
foreach(ShapeRecord record in m_ShapeTileArgs.ShapeRecords)
{
if(record.Value != null)
{
if(record.Point != null)
{
Shapefile_Point p = new Shapefile_Point();
p.X = record.Point.X;
p.Y = record.Point.Y;
p.Tag = record.Value;
m_LabelList.Add(p);
}
else if(record.MultiPoint != null)
{
Shapefile_Point p = new Shapefile_Point();
p.X = 0.5 * (record.MultiPoint.BoundingBox.West + record.MultiPoint.BoundingBox.East);
p.Y = 0.5 * (record.MultiPoint.BoundingBox.North + record.MultiPoint.BoundingBox.South);
p.Tag = record.Value;
m_LabelList.Add(p);
}
else if(record.PolyLine != null)
{
Shapefile_Point p = new Shapefile_Point();
p.X = 0.5 * (record.PolyLine.BoundingBox.West + record.PolyLine.BoundingBox.East);
p.Y = 0.5 * (record.PolyLine.BoundingBox.North + record.PolyLine.BoundingBox.South);
p.Tag = record.Value;
m_LabelList.Add(p);
}
else if(record.Polygon != null)
{
Shapefile_Point p = new Shapefile_Point();
p.X = 0.5 * (record.Polygon.BoundingBox.West + record.Polygon.BoundingBox.East);
p.Y = 0.5 * (record.Polygon.BoundingBox.North + record.Polygon.BoundingBox.South);
p.Tag = record.Value;
m_LabelList.Add(p);
}
}
}
}
}
catch(Exception ex)
{
Log.Write(ex);
}
finally
{
isInitialized = true;
}
}