private void RenderMgrsGridCell(
DrawingContext pDC,
GridZone pCell)
{
var view = Viewport.Extend;
Point[] clipPolygon = new Point[]
{
new Point(pCell.Extend.WestBoundLongitude, pCell.Extend.NorthBoundLatitude),
new Point(pCell.Extend.EastBoundLongitude, pCell.Extend.NorthBoundLatitude),
new Point(pCell.Extend.EastBoundLongitude, pCell.Extend.SouthBoundLatitude),
new Point(pCell.Extend.WestBoundLongitude, pCell.Extend.SouthBoundLatitude)
};
int interval = (int)MgrsGridPrecision; // Number of meters
int precision = (int)MgrsGridPrecision;
var sw = pCell.SouthWest();
var ne = pCell.NorthEast();
var swUtm = sw.ConvertToUtm();
var neUtm = ne.ConvertToUtm();
var swMgrs = sw.ConvertToMgrs();
Debug.Assert(swUtm.Zone == neUtm.Zone, "UTM cell over multiple zones");
int utmZone = swUtm.Zone;
double sw_utm_e = (Math.Floor(swUtm.East / precision) * precision);
double sw_utm_n = (Math.Floor(swUtm.North / precision) * precision);
double ne_utm_e = (Math.Floor(neUtm.East / precision) * precision);
double ne_utm_n = (Math.Floor(neUtm.North / precision) * precision);
int numberOfCells = (((int)(Math.Abs(sw_utm_n - ne_utm_n) / interval)) * ((int)(Math.Abs(sw_utm_e - ne_utm_e) / interval)));
if (numberOfCells > 210)
{
return; // Safety check; takes to long to render
}
int count = 0;
for (double currentNorth = sw_utm_n; currentNorth <= ne_utm_n; currentNorth += interval)
{
for (double currentEast = sw_utm_e; currentEast <= ne_utm_e; currentEast += interval)
{
count++;
var lowerLeftLatLon = UTMtoLL(currentNorth, currentEast, utmZone, sw.Latitude >= 0 ? Geocentric.Hemisphere.North : Geocentric.Hemisphere.South); ;
var upperRightLatLon = UTMtoLL(currentNorth + interval, currentEast + interval, utmZone, sw.Latitude >= 0 ? Geocentric.Hemisphere.North : Geocentric.Hemisphere.South); ;
var lowerRightLatLon = UTMtoLL(currentNorth, currentEast + interval, utmZone, sw.Latitude >= 0 ? Geocentric.Hemisphere.North : Geocentric.Hemisphere.South); ;
var upperLeftLatLon = UTMtoLL(currentNorth + interval, currentEast, utmZone, sw.Latitude >= 0 ? Geocentric.Hemisphere.North : Geocentric.Hemisphere.South); ;
Point[] utm = new Point[]
{
new Point(upperLeftLatLon.Longitude, upperLeftLatLon.Latitude),
new Point(upperRightLatLon.Longitude, upperRightLatLon.Latitude),
new Point(lowerRightLatLon.Longitude, lowerRightLatLon.Latitude),
new Point(lowerLeftLatLon.Longitude, lowerLeftLatLon.Latitude),
};
var intersect = SutherlandHodgman.GetIntersectedPolygon(utm, clipPolygon);
if ((intersect != null) && (intersect.Length >= 4))
{
for (int i = 0; i < intersect.Length - 1; i++)
{
var p1 = Viewport.EsriMap.MapToScreen(WGS84LatLongPoint.Create(intersect[i].Y, intersect[i].X).ToEsriGeometry(102100));
var p2 = Viewport.EsriMap.MapToScreen(WGS84LatLongPoint.Create(intersect[i + 1].Y, intersect[i + 1].X).ToEsriGeometry(102100));
pDC.DrawLine(mMgrsLinePen, new Point(p1.X, p1.Y), new Point(p2.X, p2.Y));
}
var bb = new MgrsBoundingBox(intersect);
if (currentNorth + interval > ne_utm_n) RenderMgrsCellLabels(pDC, bb, currentNorth, currentEast, NorthEast.North);
if (currentEast + interval > ne_utm_e) RenderMgrsCellLabels(pDC, bb, currentNorth, currentEast, NorthEast.East);
RenderMgrsCenterLabel(pDC, bb, currentNorth, currentEast);
}
}
}
}
private System.Windows.Size CellSizeInPixels(MgrsBoundingBox pBoundingBox)
{
var upperRight = Viewport.EsriMap.MapToScreen(pBoundingBox.UpperRight.ToEsriGeometry(102100));
var lowerLeft = Viewport.EsriMap.MapToScreen(pBoundingBox.LowerLeft.ToEsriGeometry(102100));
return new System.Windows.Size(Math.Abs(lowerLeft.X - upperRight.X), Math.Abs(lowerLeft.Y - upperRight.Y));
}
private void RenderMgrsCellLabels(DrawingContext pDC, MgrsBoundingBox pBoundingBox, double pNorth, double pEast, NorthEast pDirection)
{
int numberOfDigits;
switch (MgrsGridPrecision)
{
case EGridPrecision.Grid10km:
numberOfDigits = 1;
break;
case EGridPrecision.Grid1km:
numberOfDigits = 2;
break;
case EGridPrecision.Grid100m:
numberOfDigits = 3;
break;
default: return; // Dont render label
}
var cellSize = CellSizeInPixels(pBoundingBox);
if ((cellSize.Width > 30) && (cellSize.Height > 30))
{
var eastFont = new FormattedText(pNorth.ToString().Substring(2, numberOfDigits),
CultureInfo.CurrentCulture, FlowDirection.LeftToRight, mTypefaceMgrsCellLabel, mFontSizeMgrsCellLabel, mFontColorMgrsCellLabel);
var northFont = new FormattedText(pEast.ToString().Substring(1, numberOfDigits),
CultureInfo.CurrentCulture, FlowDirection.LeftToRight, mTypefaceMgrsCellLabel, mFontSizeMgrsCellLabel, mFontColorMgrsCellLabel);
var lowerLeft = Viewport.EsriMap.MapToScreen(pBoundingBox.LowerLeft.ToEsriGeometry(102100));
int marge = 3;
if (pDirection == NorthEast.East)
{
// Horizontal labels
var rectNorth = GetBoundingRect(northFont);
rectNorth.Inflate(marge * 2, marge * 2);
var northPoint = new Point(lowerLeft.X + (cellSize.Width / 2) - (rectNorth.Width / 2), lowerLeft.Y - (rectNorth.Height / 2));
pDC.DrawRoundedRectangle(mFontColorMgrsFill, mMgrsLabelLinePen, new Rect(northPoint, rectNorth.Size), 2, 2);
pDC.DrawText(eastFont, new Point(northPoint.X + marge, northPoint.Y + marge));
}
if (pDirection == NorthEast.North)
{
// Vertical
var rectEast = GetBoundingRect(eastFont);
rectEast.Inflate(marge * 2, marge * 2);
var eastPoint = new Point(lowerLeft.X - (rectEast.Width / 2), lowerLeft.Y - (cellSize.Height / 2) - (rectEast.Height / 2));
pDC.DrawRoundedRectangle(mFontColorMgrsFill, mMgrsLabelLinePen, new Rect(eastPoint, rectEast.Size), 2, 2);
pDC.DrawText(northFont, new Point(eastPoint.X + marge, eastPoint.Y + marge));
}
}
}
private void RenderMgrsCenterLabel(DrawingContext pDC, MgrsBoundingBox pBoundingBox, double pNorth, double pEast)
{
if (!Cfg.DrawCenterMgrsGridLabel) return;
var cellSize = CellSizeInPixels(pBoundingBox);
var center = pBoundingBox.CenterOfMass();
var c = center.ConvertToMgrs();
var p3 = Viewport.EsriMap.MapToScreen(center.ToEsriGeometry(102100));
int fontSize;
string label;
if (cellSize.Width < 100)
{
fontSize = 16;
label = c.Grid;
} else if (cellSize.Width < 150)
{
fontSize = 18;
label = c.Grid;
} else
{
fontSize = 20;
label = c.Zoneband + " " + c.Grid;
}
var ft = new FormattedText(label, CultureInfo.CurrentCulture, FlowDirection.LeftToRight,
mTypefaceMgrsCellCenterLabel, fontSize, mFontColorMgrsCellCenterLabel);
//pDC.DrawText(ft, new Point(p3.X - (ft.Width / 2), p3.Y - (ft.Height / 2)));
System.Windows.Media.Geometry textGeometry = ft.BuildGeometry(new Point(p3.X - (ft.Width / 2), p3.Y - (ft.Height / 2)));
pDC.DrawGeometry(Brushes.White, new Pen(Brushes.Black, 1), textGeometry);
}