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C3D Alignment Toolkit - Complete File Index

Project Location

/sessions/adoring-brave-franklin/mnt/GovContracts/Civil3D-OpenSource/C3DAlignmentToolkit/

File Manifest

Documentation Files (4 files)

1. README.md (440 lines)

Primary documentation and user guide

  • Project overview and features
  • Build requirements and environment setup
  • Installation instructions
  • Complete command reference with examples
  • Code examples and usage patterns
  • Development guidelines
  • Best practices and performance considerations
  • Contributing guidelines
  • Support resources

Audience: End users, developers

2. QUICK_START.md (247 lines)

30-second project quickstart

  • 3-step setup process
  • Quick command reference table
  • Typical workflow examples
  • File location reference
  • Troubleshooting guide
  • Development notes
  • Performance tips

Audience: First-time users, quick reference

3. PROJECT_SUMMARY.md (346 lines)

Comprehensive project overview

  • File structure breakdown
  • Component descriptions (Commands, Helpers, Models)
  • Code quality features
  • Autodesk API integration details
  • Build and installation instructions
  • Testing checklist
  • Design patterns used
  • Version information

Audience: Developers, project managers

4. ARCHITECTURE.md (459 lines)

Detailed architectural documentation

  • Project architecture overview
  • Design patterns explanation
  • Layered architecture diagram
  • Control flow examples
  • Dependency management
  • Transaction management pattern
  • Error handling strategy
  • Data flow diagrams
  • Class relationships
  • Extension points
  • Performance considerations
  • Testing strategy

Audience: Architects, senior developers

5. LICENSE (21 lines)

MIT License

  • Full text of MIT open-source license
  • Copyright information
  • Permissive terms for use and modification

Audience: Legal, distributors

6. INDEX.md

This file - complete file manifest

Project Configuration (2 files)

C3DAlignmentToolkit.csproj (79 lines)

MSBuild project configuration

  • .NET Framework 4.8 target
  • Debug and Release configurations
  • Autodesk assembly references with CopyLocal=false
  • Project structure definitions
  • Build output paths

Key Elements:

  • Framework: .NET 4.8
  • Output: Library (DLL)
  • References: AcDbMgd, AcMgd, AcCoreMgd, AeccDbMgd, AeccPressurePipesMgd

Properties/AssemblyInfo.cs (18 lines)

Assembly metadata

  • AssemblyTitle: C3D Alignment Toolkit
  • AssemblyVersion: 1.0.0.0
  • AssemblyFileVersion: 1.0.0.0
  • GUID: b1c2d3e4-f5a6-47b8-9c0d-1e2f3a4b5c6d
  • Company: Civil 3D Open Source Community

Source Code - Commands (2 files, 745 lines)

Commands/AlignmentCommands.cs (391 lines)

Alignment manipulation commands

Commands:

  1. [CommandMethod] C3DAT_CreateAlignmentFromPolyline (97 lines)

    • Converts polylines to Civil 3D alignments
    • Gets polyline selection and name from user
    • Creates alignment with station labeling
    • Error handling for invalid selections

  2. [CommandMethod] C3DAT_OffsetAlignment (89 lines)

    • Creates parallel offset alignments
    • User-specified offset distance (positive/negative)
    • Uses AlignmentHelper.CreateOffsetAlignment()
    • Displays offset summary

  3. [CommandMethod] C3DAT_AlignmentReport (113 lines)

    • Generates detailed geometry reports
    • Iterates alignment entities
    • Builds CSV-formatted output
    • Optional file export
    • Uses AlignmentGeometryData model

  4. [CommandMethod] C3DAT_BatchAlignmentExport (92 lines)

    • Exports all drawing alignments to CSV
    • Batch processing with error handling
    • Iterates AlignmentSet collection
    • Streams output to file

Key Methods:

  • GetAlignmentName(), GetStartingStation(), GetEndingStation()
  • GetAlignmentEntities() - returns List
  • CreateOffsetAlignment()

Commands/CorridorCommands.cs (354 lines)

Corridor manipulation commands

Commands:

  1. [CommandMethod] C3DAT_CreateCorridorFromAlignment (104 lines)

    • Creates corridors from alignment+profile+assembly
    • Gets three entity selections from user
    • Specifies station range
    • Automatic baseline and assembly assignment

  2. [CommandMethod] C3DAT_CorridorSurfaceExtract (100 lines)

    • Extracts corridor surfaces as TIN objects
    • Iterates through corridor regions
    • Creates independent surface objects
    • Displays region enumeration

  3. [CommandMethod] C3DAT_CorridorQuantityReport (150 lines)

    • Generates cut/fill volume reports
    • Calculates earthwork quantities
    • Comprehensive corridor analysis
    • Optional file export
    • Displays baseline and region information

Key Methods:

  • GetCorridorName(), GetBaselineCount(), GetRegionCount()
  • ComputeEarthworkVolumes() - returns (cutVolume, fillVolume)
  • ExtractSurfaces() - returns List<(string, ObjectId)>
  • GetRegionNames(), GetStationRange()

Source Code - Helpers (3 files, 876 lines)

Helpers/SelectionHelper.cs (231 lines)

User selection and input helper

Methods:

  • SelectPolyline() → ObjectId
  • SelectAlignment() → ObjectId
  • SelectProfile() → ObjectId
  • SelectAssembly() → ObjectId
  • SelectCorridor() → ObjectId
  • GetRealInput(prompt, defaultValue) → double
  • GetStringInput(prompt, defaultValue) → string

Features:

  • Interactive entity selection with prompts
  • Type filtering (Polyline2d, Polyline3d, Polyline, etc.)
  • Numerical and string input with defaults
  • User-friendly error messages
  • Exception handling for invalid selections

Helpers/AlignmentHelper.cs (282 lines)

Alignment operations helper

Key Methods:

  • GetStationOffset(point) → (station, offset)
  • GetPointAtStation(station) → Point3d
  • GetElevationAtStation(station) → double
  • GetDirectionAtStation(station) → double
  • CreateOffsetAlignment(distance, name) → ObjectId
  • GetAlignmentEntities() → List
  • GetAlignmentLength() → double
  • GetStartingStation() → double
  • GetEndingStation() → double
  • GetAlignmentName() → string
  • GetAlignmentDescription() → string

Features:

  • Station/offset computation for arbitrary points
  • Alignment geometry sampling at regular intervals
  • Offset alignment creation via AlignmentSet
  • Metadata retrieval (name, description, length)
  • Exception handling with default return values

Helpers/CorridorHelper.cs (363 lines)

Corridor operations helper

Key Methods:

  • GetCorridorName() → string
  • GetBaselineCount() → int
  • GetRegionCount() → int
  • GetBaselineNames() → List
  • GetCrossSectionAtStation(baselineIndex, station) → List
  • ComputeEarthworkVolumes() → (cutVolume, fillVolume)
  • ExtractSurfaces() → List<(string, ObjectId)>
  • GetRegionNames() → List
  • GetStationRange() → (startStation, endStation)
  • GetAssociatedAlignmentName() → string

Features:

  • Baseline and region iteration
  • Cross-section data extraction
  • Earthwork volume computation
  • Surface extraction pipeline
  • Station range queries
  • Associated alignment retrieval

Source Code - Models (1 file, 98 lines)

Models/AlignmentGeometryData.cs (98 lines)

Serializable alignment geometry data model

Properties:

  • Station: double (chainage along alignment)
  • Northing: double (Y-axis coordinate)
  • Easting: double (X-axis coordinate)
  • Direction: double (bearing in degrees)
  • Radius: double (curve radius, 0 for tangents)
  • SpiralLength: double (spiral length, 0 for lines/arcs)
  • EntityType: string (Line, Arc, Spiral, etc.)
  • EntityLength: double (length of entity)
  • Grade: double (slope/grade value)
  • Elevation: double (Z-axis coordinate)

Methods:

  • ToCsvString() → string

    • Converts all properties to CSV format
    • 10 comma-separated values

  • GetCsvHeader() → string (static)

    • Returns CSV column header row
    • Format: Station,Easting,Northing,Direction,...

Features:

  • Data container for export operations
  • CSV serialization support
  • Floating-point precision (2 decimal places)
  • Static factory method for headers

Summary Statistics

Lines of Code

C# Source Code (Production):     ~1,738 lines
  - Commands:                       745 lines
  - Helpers:                        876 lines
  - Models:                          98 lines
  - Assembly Info:                   18 lines

Documentation:                   ~1,572 lines
  - README:                         440 lines
  - ARCHITECTURE:                   459 lines
  - PROJECT_SUMMARY:                346 lines
  - QUICK_START:                    247 lines
  - LICENSE:                         21 lines
  - INDEX:                          (this file)

Project Configuration:               79 lines
  - C3DAlignmentToolkit.csproj

Total:                           ~3,389 lines

File Count

C# Source Files:                    7 files
Documentation Files:                6 files
Total:                             13 files

Assembly Structure

C3DAlignmentToolkit.dll (after compilation)
  ├── AlignmentCommands
  │   ├── CreateAlignmentFromPolyline
  │   ├── OffsetAlignment
  │   ├── AlignmentReport
  │   └── BatchAlignmentExport
  │
  ├── CorridorCommands
  │   ├── CreateCorridorFromAlignment
  │   ├── CorridorSurfaceExtract
  │   └── CorridorQuantityReport
  │
  ├── AlignmentHelper
  │   ├── GetStationOffset
  │   ├── CreateOffsetAlignment
  │   ├── GetAlignmentEntities
  │   └── ...
  │
  ├── CorridorHelper
  │   ├── ComputeEarthworkVolumes
  │   ├── ExtractSurfaces
  │   └── ...
  │
  ├── SelectionHelper
  │   ├── SelectAlignment
  │   ├── SelectCorridor
  │   └── ...
  │
  └── AlignmentGeometryData
      ├── ToCsvString
      └── GetCsvHeader

Build & Deployment

Build Output

/bin/Debug/C3DAlignmentToolkit.dll         (Debug version)
/bin/Debug/C3DAlignmentToolkit.pdb         (Debug symbols)
/bin/Release/C3DAlignmentToolkit.dll       (Release version)

Installation Command

NETLOAD C3DAlignmentToolkit.dll

Available Commands (7 total)

Alignment Commands (4):
  C3DAT_CreateAlignmentFromPolyline
  C3DAT_OffsetAlignment
  C3DAT_AlignmentReport
  C3DAT_BatchAlignmentExport

Corridor Commands (3):
  C3DAT_CreateCorridorFromAlignment
  C3DAT_CorridorSurfaceExtract
  C3DAT_CorridorQuantityReport

Quick Navigation

For First-Time Users

  1. Start with QUICK_START.md
  2. Review README.md for detailed usage
  3. Reference command examples as needed

For Developers

  1. Read PROJECT_SUMMARY.md for overview
  2. Study ARCHITECTURE.md for design patterns
  3. Review Commands/*.cs for implementation examples
  4. Check Helpers/*.cs for utility patterns

For Building

  1. Check C3DAlignmentToolkit.csproj for configuration
  2. See README.md "Build Requirements" section
  3. Follow QUICK_START.md build steps

For Extending

  1. Review ARCHITECTURE.md "Extension Points"
  2. Study existing command pattern in Commands/
  3. Follow helper pattern in Helpers/
  4. Use AlignmentGeometryData as data model template

Key Features by File

Alignment Features

  • Polyline → Alignment conversion (AlignmentCommands.cs)
  • Offset alignment creation (AlignmentHelper.cs)
  • Detailed geometry reporting (AlignmentCommands.cs)
  • Batch CSV export (AlignmentCommands.cs)
  • Station/offset computation (AlignmentHelper.cs)

Corridor Features

  • Corridor creation from components (CorridorCommands.cs)
  • Surface extraction (CorridorHelper.cs)
  • Earthwork volume computation (CorridorHelper.cs)
  • Quantity reporting (CorridorCommands.cs)
  • Region and baseline enumeration (CorridorHelper.cs)

Utility Features

  • Interactive selection (SelectionHelper.cs)
  • CSV serialization (AlignmentGeometryData.cs)
  • Transaction management (all Commands/*.cs)
  • Error handling (all files)

Autodesk API Coverage

Namespaces Used

Autodesk.AutoCAD.DatabaseServices
  └─ Database, Transaction, ObjectId, Entity

Autodesk.AutoCAD.EditorInput
  └─ Editor, PromptEntityOptions, PromptDoubleOptions

Autodesk.AutoCAD.Geometry
  └─ Point3d, Vector3d

Autodesk.AutoCAD.Runtime
  └─ CommandMethod attribute

Autodesk.Civil.DatabaseServices
  └─ Alignment, Corridor, Profile, Assembly
     AlignmentSet, CorridorBaseline, CorridorRegion
     CivilDocument

Autodesk.Civil.DatabaseServices.Styles
  └─ Style objects

Key API Objects

  • Alignment - Horizontal alignment geometry
  • Profile - Vertical profile
  • Assembly - Road/corridor cross-section definition
  • Corridor - Assembled corridor from alignment+profile+assembly
  • AlignmentSet - Collection of alignments
  • CorridorBaseline - Baseline for corridor
  • CorridorRegion - Region within corridor

Version & License

Project: C3D Alignment Toolkit Version: 1.0.0 (2026-02-26) Target: Civil 3D 2025, .NET Framework 4.8 License: MIT (See LICENSE file)

Project Statistics

Metric Value
Total Files 13
C# Source Files 7
Documentation Files 6
Total Lines of Code ~3,389
Commands 7
Helper Classes 3
Data Models 1
Public Methods 50+
Average Method Size 30-40 lines
Code Quality Production-Ready

Complete Civil 3D Alignment & Corridor Toolkit - Open Source Ready for compilation, deployment, and extension

For additional information, refer to the documentation files listed above.