Understanding Geometry model

What is Geometry Model?

OpenRoads Designer Or Any other Civil Product uses Civil Schema on top of basic DGN model.
DGN model store core CAD elements like Line, Arc, Text etc.
Civil Schema uses Geometric model which is a container to store objects such as Horizontal and vertical alignment, Corridor, SuperElevationSection, Terrains, Annotation Definitions, Civil Cells, Cants, Feature definition, etc.
Geometric model supports read only access for some of the objects like Cant, FlowModelComponent, SightVisibilitySection,AnnotationDefinition, AnnotationGroup, FeatureDefinition, ImportedEntities, SurfaceEntity.

Conceptual Class Diagram

Examples of accessing objects in Geometric Model

Get Active Geometric Model

//Get Connection to Active DGN
Bentley.DgnPlatformNET.DgnModel activeModel = Bentley.MstnPlatformNET.Session.Instance.GetActiveDgnModel();
Bentley.CifNET.SDK.ConsensusConnection con = new Bentley.CifNET.SDK.ConsensusConnection(activeModel);
Bentley.CifNET.GeometryModel.SDK.GeometricModel geomModel = con.GetActiveGeometricModel();

Alignments


//List All Alignments
foreach (Alignment al in geomModel.Alignments)
{
	//Do something with Alignment
}

Corridors


//List All Corridors 
foreach (Corridor corridor in geomModel.Corridors)
{
	//Do something with corridor
}

Terrains


//List All Terrains
foreach (TerrainSurface terrain in geomModel.TerrainSurfaces)
{
    //Do something with terrain
}

SuperElevations


//List All SuperElevations
foreach (SuperElevationSection superElevationSection in geomModel.SuperElevationSections)
   {
       IEnumerable<SuperElevation> superElevations = superElevationSection.SuperElevations;
       foreach(SuperElevation superElevation in superElevations)
       {
        //Do something with superelevation
       }
   }

CurveWidenings


foreach (Corridor corridor in geomModel.Corridors)
{
    IEnumerable<CurveWidening> curveWidenings= corridor.CurveWidenings;
    foreach(CurveWidening curveWidening in curveWidenings)
    {
        //Do something with curve widening    
    }
}

CiviCells


//List All CivilCells
foreach (CivilCell civilCell in geomModel.CivilCells)
{
	//Do something with civil cell       
}

AnnotationGroups

			
//Get all annotation groups 
foreach (AnnotationGroup annotationGroup in geomModel.AnnotationGroups)
{
	IEnumerable<AnnotationDefinition> annotationDefinitions =  annotationGroup.AnnotationDefinitions;
	foreach(AnnotationDefinition annotationDefinition in annotationDefinitions)
		{
			//Do something with annotation definition
		}
}