/// <summary>
/// Creates the 3D and 2D contexts information.
/// </summary>
/// <param name="exporterIFC">The IFC exporter object.</param>
/// <param name="doc">The document provides the ProjectLocation.</param>
/// <returns>The collection contains the 3D/2D context (not sub-context) handles of IFC file.</returns>
private HashSet<IFCAnyHandle> CreateContextInformation(ExporterIFC exporterIFC, Document doc)
{
HashSet<IFCAnyHandle> repContexts = new HashSet<IFCAnyHandle>();
double scaledPrecision = UnitUtil.ScaleLength(doc.Application.VertexTolerance/10.0);
int exponent = Convert.ToInt32(Math.Log10(scaledPrecision));
double precision = Math.Pow(10.0, exponent);
IFCFile file = exporterIFC.GetFile();
IFCAnyHandle origin = ExporterIFCUtils.GetGlobal3DOriginHandle();
IFCAnyHandle wcs = IFCInstanceExporter.CreateAxis2Placement3D(file, origin, null, null);
double trueNorthAngleInRadians;
ExporterUtil.GetSafeProjectPositionAngle(doc, out trueNorthAngleInRadians);
// CoordinationView2.0 requires that we always export true north, even if it is the same as project north.
IFCAnyHandle trueNorth = null;
{
double trueNorthAngleConverted = -trueNorthAngleInRadians + Math.PI / 2.0;
List<double> dirRatios = new List<double>();
dirRatios.Add(Math.Cos(trueNorthAngleConverted));
dirRatios.Add(Math.Sin(trueNorthAngleConverted));
trueNorth = IFCInstanceExporter.CreateDirection(file, dirRatios);
}
int dimCount = 3;
IFCAnyHandle context3D = IFCInstanceExporter.CreateGeometricRepresentationContext(file, null,
"Model", dimCount, precision, wcs, trueNorth);
// CoordinationView2.0 requires sub-contexts of "Axis", "Body", and "Box". We will use these for regular export also.
{
IFCAnyHandle context3DAxis = IFCInstanceExporter.CreateGeometricRepresentationSubContext(file,
"Axis", "Model", context3D, null, Toolkit.IFCGeometricProjection.Graph_View, null);
IFCAnyHandle context3DBody = IFCInstanceExporter.CreateGeometricRepresentationSubContext(file,
"Body", "Model", context3D, null, Toolkit.IFCGeometricProjection.Model_View, null);
IFCAnyHandle context3DBox = IFCInstanceExporter.CreateGeometricRepresentationSubContext(file,
"Box", "Model", context3D, null, Toolkit.IFCGeometricProjection.Model_View, null);
IFCAnyHandle context3DFootPrint = IFCInstanceExporter.CreateGeometricRepresentationSubContext(file,
"FootPrint", "Model", context3D, null, Toolkit.IFCGeometricProjection.Model_View, null);
exporterIFC.Set3DContextHandle(context3DAxis, "Axis");
exporterIFC.Set3DContextHandle(context3DBody, "Body");
exporterIFC.Set3DContextHandle(context3DBox, "Box");
exporterIFC.Set3DContextHandle(context3DFootPrint, "FootPrint");
}
exporterIFC.Set3DContextHandle(context3D, "");
repContexts.Add(context3D); // Only Contexts in list, not sub-contexts.
if (ExporterCacheManager.ExportOptionsCache.ExportAnnotations)
{
string context2DType = "Annotation";
IFCAnyHandle context2DHandle = IFCInstanceExporter.CreateGeometricRepresentationContext(file,
null, context2DType, dimCount, precision, wcs, trueNorth);
IFCAnyHandle context2D = IFCInstanceExporter.CreateGeometricRepresentationSubContext(file,
null, context2DType, context2DHandle, 0.01, Toolkit.IFCGeometricProjection.Plan_View, null);
exporterIFC.Set2DContextHandle(context2D);
repContexts.Add(context2DHandle); // Only Contexts in list, not sub-contexts.
}
return repContexts;
}
/// <summary>
/// Creates the 3D and 2D contexts information.
/// </summary>
/// <param name="exporterIFC">The IFC exporter object.</param>
/// <param name="doc">The document provides the ProjectLocation.</param>
/// <returns>The collection contains the 3D/2D context (not sub-context) handles of IFC file.</returns>
private HashSet<IFCAnyHandle> CreateContextInformation(ExporterIFC exporterIFC, Document doc)
{
HashSet<IFCAnyHandle> repContexts = new HashSet<IFCAnyHandle>();
double scale = exporterIFC.LinearScale;
double precision = MathUtil.Eps();
if (scale > 1.0 + precision)
{
int exponent = ((int)(Math.Log10(scale) - 0.01)) + 1;
precision *= Math.Pow(10.0, exponent);
}
IFCFile file = exporterIFC.GetFile();
IFCAnyHandle origin = ExporterIFCUtils.GetGlobal3DOriginHandle();
IFCAnyHandle wcs = IFCInstanceExporter.CreateAxis2Placement3D(file, origin, null, null);
ProjectLocation projLoc = doc.ActiveProjectLocation;
double trueNorthAngleInRadians = 0.0;
try
{
ProjectPosition projPos = projLoc.get_ProjectPosition(XYZ.Zero);
trueNorthAngleInRadians = projPos.Angle;
}
catch (InternalException)
{
//fail to get true north, ignore
}
// CoordinationView2.0 requires that we always export true north, even if it is the same as project north.
IFCAnyHandle trueNorth = null;
{
double trueNorthAngleConverted = -trueNorthAngleInRadians + Math.PI / 2.0;
List<double> dirRatios = new List<double>();
dirRatios.Add(2);
dirRatios.Add(Math.Cos(trueNorthAngleConverted));
dirRatios.Add(Math.Sin(trueNorthAngleConverted));
trueNorth = IFCInstanceExporter.CreateDirection(file, dirRatios);
}
int dimCount = 3;
IFCAnyHandle context3D = IFCInstanceExporter.CreateGeometricRepresentationContext(file, null,
"Model", dimCount, precision, wcs, trueNorth);
// CoordinationView2.0 requires sub-contexts of "Axis", "Body", and "Box". We will use these for regular export also.
{
IFCAnyHandle context3DAxis = IFCInstanceExporter.CreateGeometricRepresentationSubContext(file,
"Axis", "Model", context3D, null, Toolkit.IFCGeometricProjection.Graph_View, null);
IFCAnyHandle context3DBody = IFCInstanceExporter.CreateGeometricRepresentationSubContext(file,
"Body", "Model", context3D, null, Toolkit.IFCGeometricProjection.Model_View, null);
IFCAnyHandle context3DBox = IFCInstanceExporter.CreateGeometricRepresentationSubContext(file,
"Box", "Model", context3D, null, Toolkit.IFCGeometricProjection.Model_View, null);
IFCAnyHandle context3DFootPrint = IFCInstanceExporter.CreateGeometricRepresentationSubContext(file,
"FootPrint", "Model", context3D, null, Toolkit.IFCGeometricProjection.Model_View, null);
exporterIFC.Set3DContextHandle(context3DAxis, "Axis");
exporterIFC.Set3DContextHandle(context3DBody, "Body");
exporterIFC.Set3DContextHandle(context3DBox, "Box");
exporterIFC.Set3DContextHandle(context3DFootPrint, "FootPrint");
}
exporterIFC.Set3DContextHandle(context3D, "");
repContexts.Add(context3D); // Only Contexts in list, not sub-contexts.
if (ExporterCacheManager.ExportOptionsCache.ExportAnnotations)
{
string context2DType = "Annotation";
IFCAnyHandle context2DHandle = IFCInstanceExporter.CreateGeometricRepresentationContext(file,
null, context2DType, dimCount, precision, wcs, trueNorth);
IFCAnyHandle context2D = IFCInstanceExporter.CreateGeometricRepresentationSubContext(file,
null, context2DType, context2DHandle, 0.01, Toolkit.IFCGeometricProjection.Plan_View, null);
exporterIFC.Set2DContextHandle(context2D);
repContexts.Add(context2DHandle); // Only Contexts in list, not sub-contexts.
}
return repContexts;
}
