GridVolumeSurface.md

GridVolumeSurface Class

Overview

The GridVolumeSurface class represents a grid-based volume surface in Civil3D, used to calculate cut and fill volumes between two grid surfaces.

Namespace

Autodesk.Civil.DatabaseServices

Inheritance Hierarchy

System.Object
  └─ RXObject
      └─ DBObject
          └─ Entity
              └─ Surface
                  └─ GridVolumeSurface

Key Properties

Property	Type	Description
BaseSurfaceId	ObjectId	Gets/sets the base surface
ComparisonSurfaceId	ObjectId	Gets/sets the comparison surface

Code Examples

Example 1: Accessing Grid Volume Surface

using (Transaction tr = civilDoc.Database.TransactionManager.StartTransaction())
{
    GridVolumeSurface volSurf = tr.GetObject(volumeSurfaceId, OpenMode.ForRead) as GridVolumeSurface;
    
    ed.WriteMessage($"\nGrid Volume Surface: {volSurf.Name}");
    
    Surface baseSurf = tr.GetObject(volSurf.BaseSurfaceId, OpenMode.ForRead) as Surface;
    Surface compSurf = tr.GetObject(volSurf.ComparisonSurfaceId, OpenMode.ForRead) as Surface;
    
    ed.WriteMessage($"\nBase Surface: {baseSurf.Name}");
    ed.WriteMessage($"\nComparison Surface: {compSurf.Name}");
    
    tr.Commit();
}

Related Objects

• Surface - Base class
• GridSurface - Component surfaces
• CivilDocument - Container

References

• Autodesk Official Documentation