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| Subject |
ConvertToMapPoint not working in 3D mode |
| Author |
Jeff Frith |
| Date |
Mar 31, 2010 |
| Message |
The MapDisplay.ConvertToMapPoint() method is returning some odd results when in AGX 900 3D mode. I am creating a trackpoint and then converting the coordinates to a screenpoint using MapDisplay.ConvertToScreenPoint(). I then take the resulting microsoft screen point and convert it back to a ESRI point.
While in 2D mode, the point converts to screen coordinates and back to map coordinates with no loss of accuracy. If I then switch to 3D mode, the initial point coordinates and translated screen coordinates look correct. however the resulting conversion back to a point returns coordinates that are way off.
For example clicking the top left corner of the map display I get in 2D mode:
Point: 32.788, -79.904
Point to ScreenPoint: 0, 0
ScreenPoint to Point: 32.788, -79.904
Same test in 3D mode:
Point: 32.788, -79.904
Point to ScreenPoint: 0, 0
ScreenPoint to Point: 6.756, 157.689
Does anybody have any idea if this is a bug or am I missing a step? Attached is sample code and a compiled eaz of the test addin. |
| |
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using ESRI.ArcGISExplorer;
using ESRI.ArcGISExplorer.Application;
using ESRI.ArcGISExplorer.Mapping;
using ESRI.ArcGISExplorer.Geometry;
using ESRI.ArcGISExplorer.Data;
using ESRI.ArcGISExplorer.Threading;
namespace ScreenToCoordTest
{
public partial class CoordTest : ESRI.ArcGISExplorer.Application.DockWindow
{
public CoordTest()
{
InitializeComponent();
}
private void btnTrackPoint_Click(object sender, EventArgs e)
{
MapDisplay md = ESRI.ArcGISExplorer.Application.Application.ActiveMapDisplay;
//Capture Track Point and add to display as graphic
ESRI.ArcGISExplorer.Geometry.Point trackedPoint = md.TrackPoint();
Graphic trackedGraphic = new Graphic(trackedPoint, Symbol.Marker.Pushpin.Red);
md.Graphics.Add(trackedGraphic);
//Display clicked on track point coordinates
txtBxLat.Text = trackedPoint.GetLatitude().ToString();
txtBxLon.Text = trackedPoint.GetLongitude().ToString();
//Show the active map display display mode
if (md.DisplayMode == DisplayMode.Display3D)
{
txtBxMode.Text = md.CurrentCoordinateSystem.ToString() + " (3D)";
}
else
{
txtBxMode.Text = md.CurrentCoordinateSystem.ToString() + " (2D)";
}
//Convert Trackpoint coordinates to screen coordinates and show results
System.Drawing.Point screenPoint = md.ConvertToScreenPoint(trackedPoint);
txtBxCoodX.Text = screenPoint.X.ToString();
txtBxCoodY.Text = screenPoint.Y.ToString();
//Convert Screen coordinates back to geometry points and show results
ESRI.ArcGISExplorer.Geometry.Point convertedPt = new ESRI.ArcGISExplorer.Geometry.Point();
convertedPt = md.ConvertToMapPoint(screenPoint);
convertedPt.CoordinateSystem = md.CurrentCoordinateSystem;
txtBxCLat.Text = convertedPt.GetLatitude().ToString();
txtBxCLon.Text = convertedPt.GetLongitude().ToString();
}
}
}
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ScreenToCoordTest.eaz (opens in new window)
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