/// <summary>
/// This is the method that actually does the work.
/// </summary>
/// <param name="DA">The DA object is used to retrieve from inputs and store in outputs.</param>
protected override void SolveInstance(IGH_DataAccess DA)
{
///GDAL setup
RESTful.GdalConfiguration.ConfigureOgr();
///Working with data trees allows us to only call the osr coordinate transformation once, which seems to be expensive
GH_Structure <GH_Point> sourcePoints = new GH_Structure <GH_Point>();
DA.GetDataTree(0, out sourcePoints);
GH_Structure <GH_Point> destPoints = new GH_Structure <GH_Point>();
string sourceString = string.Empty;
DA.GetData(1, ref sourceString);
OSGeo.OSR.SpatialReference sourceSRS = new OSGeo.OSR.SpatialReference("");
sourceSRS.SetFromUserInput(sourceString);
if (sourceSRS.Validate() == 1)
{
AddRuntimeMessage(GH_RuntimeMessageLevel.Error, "Invalid Source SRS.");
return;
}
string destString = string.Empty;
DA.GetData(2, ref destString);
OSGeo.OSR.SpatialReference destSRS = new OSGeo.OSR.SpatialReference("");
destSRS.SetFromUserInput(destString);
if (destSRS.Validate() == 1)
{
AddRuntimeMessage(GH_RuntimeMessageLevel.Error, "Invalid Destination SRS.");
return;
}
OSGeo.OSR.CoordinateTransformation trans = new OSGeo.OSR.CoordinateTransformation(sourceSRS, destSRS);
foreach (var path in sourcePoints.Paths)
{
List <GH_Point> branchPts = (List <GH_Point>)sourcePoints.get_Branch(path);
foreach (var sp in branchPts)
{
OSGeo.OGR.Geometry destOgrPoint = new OSGeo.OGR.Geometry(wkbGeometryType.wkbPoint);
destOgrPoint.AddPoint(sp.Value.X, sp.Value.Y, sp.Value.Z);
destOgrPoint.AssignSpatialReference(sourceSRS);
destOgrPoint.Transform(trans);
Point3d destPoint = new Point3d(destOgrPoint.GetX(0), destOgrPoint.GetY(0), destOgrPoint.GetZ(0));
destPoints.Append(new GH_Point(destPoint), path);
destOgrPoint.Dispose();
}
}
DA.SetDataTree(0, destPoints);
}
