Nathan Crews Software Development Portfolio

Nathan Crews

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I am a professional software engineer with diverse work experience, application design, and development skills.

“Providing quality software solutions - on time, everytime.”

Industry Experience
- Civil Engineering
  
  3D Visualization
  
  Road Design
  
  Surface Modeling
  
  Photogrammetry
  
  COGO
  
  Hydrology
  
  Data Exchange
  
  AutoCAD Civil 3D
- Web Applications
  
  Frontend Mapping Applications
  
  Web UI Components
  
  Backend map processing
  
  Backend image processing
- Game Development
  
  Unreal Engine 5
  
  Unreal C++ plugins
  
  Unreal Blueprint
- Land Surveying
  
  3D Visualization
  
  COGO
  
  Surface Modeling
  
  Photogrammetry
  
  Data Exchange
  
  AutoCAD Civil 3D
- GIS/Mapping
  
  3D Visualization
  
  OGC web mapping
  
  Geospatial Data Intergration
  
  Photogrammetry
  
  Esri ArcGIS
  
  AutoCAD Map
- Electric Supply Services
  
  Sensor Data processing
  
  Billing data processing
  
  Customer data processing
- Open Standards Participation
  
  Founder LandXML.org (Principal XML Schema Architect)
  
  TC-127 Earth-moving machinery (Technical Expert)
  
  ECMA-388 OpenXPS (Technical Expert)
  
  Open Geospatial Consortium (Technical Expert)

Work History
- NCrews Software
  
  Position: Senior Software Engineer
  
  December 2023 – Present
  
  Description: Create and customize open source/commercial software solutions. image mapping web applications (frontend and backend). 3D visualization applications of various formats, image manipulation, multi-threading, desktop applications and Windows shell extensions.
  
  Languages: C++/C, C#, JavaScript, HTML/CSS, HTMX, NodeJS
  
  Build Tools: Visual Studio/Code 2022, CMAKE, make, gcc, XCode
  
  Platforms: Windows, Browser
  
  Frameworks: Win API/ATL/Shell/.NET, HTML DOM, CGI, NodeJS, OGC WMS, OGC WFS
  
  Libraries: STL, OpenGL, Intel TBB, MS GLTF SDK, Open3D, GLSL, LASlib (LIDAR point cloud data), GDAL, PDAL
  
  Github
- Carlson Software
  
  Position: Team Lead/Senior Software Engineer
  
  Jan 2014-Nov 2023
  
  Hydrology Engineer Game: Provided C++/Blueprints game backend and UI for engineering hydrology elements for a new learning game based on Unreal Engine 5. Precision 3D Team: Lead software development a new 3D CAD platform for civil engineers and land surveyors. Key features include drone photogrammetric/LIDAR point cloud processing, design surface modeling and data import/export.
  
  Languages: C++/C, C#, Blueprint
  
  Build Tools: Visual Studio, Unreal Build Tools
  
  Platforms: Windows, Unreal Engine 4/5
  
  Frameworks: Win API/ATL/Shell/.NET, Qt, Unreal plugin, OGC WMS, OGC WFS, Google Maps
  
  Libraries: STL, OpenGL, Intel TBB, Qt, MS GLTF SDK, Open3D, GLSL, LASlib (LIDAR point cloud data), GDAL, PDAL, Point Cloud Tools (PCL)
  
  Hydrology Engineer Game
  
  Precision 3D
- Maine Central Power/Itron Systems
  
  Position: Senior Software Engineer
  
  Jan 2012-Jul 2015
  
  Description: Primary responsibilities focused on creating custom high performance C++ and C# .NET distributed computing enterprise solutions for electric and water utilities. Windows Server Enterprise environment using Oracle and SQL Server databases with C# and ASP.NET application code. Strong debugging and performance optimization skills.
  
  Languages: C++/C, C#, SQL, XML
  
  Build Tools: Visual Studio
  
  Platforms: Windows
  
  Frameworks: Win API/.NET, SQLServer
  
  Libraries: .NET, Itron API
- Logos Technologies
  
  Position: Senior Software Engineer
  
  Description: Military Drone Video Visualization: Created 3D NASA World Wind based client/server TCP/IP socket H.264 streaming video playback software using CUDA accelerated H.264 encoding Linux server to a Windows 3D platform client using C++, C and Java
  
  Languages: C++/C, Java, CUDA
  
  Build Tools: Visual Studio, Eclispe, gcc
  
  Platforms: Windows, Linux
  
  Frameworks: Win, Linux
  
  Libraries: STL, Boost, Java libs
- Autodesk, Inc.
  
  Senior Principle Software Engineer
  
  Description: Extensive 2D and 3D graphics experience using OpenGL, AutoCAD, Revit and 3D Studio MAX. Projects: Green Building Studio Photovoltaic Energy Analysis backend development. AutoCAD Civil 3D, gbXML, OpenXPS and LandXML.org, ECMA-388 OpenXPS, LandXML.org, OGC.org standards participation.
  
  Languages: C++/C/C#, .NET, LISP, Java, ASP.NET, XSLT, XML
  
  Build Tools: Visual Studio
  
  Platforms: Windows
  
  Frameworks: MFC, AutoCAD API
  
  Libraries: STL, ATL, OpenGL, Boost, Java libs

Programming Languages
- C/C++
- C#
- JavaScript
- HTML/CSS
- GLSL/HSL
- Shell/Python Scripting

Frameworks
- Windows API
- MFC/.NET
- Qt
- AutoCAD ARX
- Unreal Engine Plugins
- WebGL
- WebGPU
- Open3D
- NodeJS
- CGI
- HTMX
- WASM
- LeftletJS
- MapBoxJS
- CesiumJS

OS/Tools/Libraries
- Windows
- Linux
- MacOS
- Cross Platform
- Chrome
- GIT/Perforce/SubVersion
- Microsoft Visual Studio
- Visual Studio Code
- cmake/make/nmake
- Qt Design Studio
- Eclipse
- STL
- Boost
- Intel TBB
- OpenGL/GLEW/GLUT/GLFW
- Windows COM/ATL/Shell
- Microsoft MFC
- Qt API
- LASlib
- PDAL/GDAL
- OpenCV
- Point Cloud Tools (PCL)
- Many other various libs...

Photo Map Creator

Quickly maps (MapBoxJS & LeafletJS) photos with GPS data by dropping photo images files onto the map. Fine tune the map by Adding, Moving and Deleting photos. Create a map viewer link, anyone with the link can view (not edit) the shared map. Supports desktop and mobile browsers.

Project Details

Browser JavaScript App. Runs client-side only for all file and image processing.

Languages: JavaScript, HTML, CSS

Build Tools: VSCode, Chrome, Edge, Safari

Platforms: desktop and mobile browsers

Framework: DOM JavaScript

Libraries: leafletJS, MapBoxJS, CesiumJS, GeoJSON, EXIFReader

Source Code

View Slide Show

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Launch Application

Point Cloud Shell Extension

Quickview huge point cloud .LAS/.LAZ files in Windows File Explorer - in seconds. Right click on .LAS/.LAZ files to produce thumbnail images.

Project Details

LAS/LAZ Pointcloud Windows Shell Extension: This "quick viewer" shell extension provides a Windows File Explorer right click menu option to quickly generate 3D preview images for large and small .las and .laz files. Typical processing time for 100mb .las 25mb .laz files is about 2 seconds. (Disclaimer: Processing time depends on compute hardware)

Files are processed in parallel using available CPU cores. A second option will create a merged 3D image for all selected .las/laz files. Both menu options support multi-file select and directory processing.

Pre-built Windows x64 installer

Languages: C++, C#

Build Tools: Visual Studio 2022

Platforms: Windows

Framework: Win API/ATL/Shell, .net

Libraries: LASLib, PDAL, Open3D, Intel TBB

Source Code

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Video

3D Point Cloud Editing

Point cloud loading, merging, cropping, editing, filtering and feature detection (ground, building, poles, curbs, paint lines). Created a point cloud smooth filtering to provide smooth and accurate contours.

Project Details

Provides point cloud loading, merging, cropping, editing, filtering and feature detection.

Created and used various filters (PCL and custom) for contour smoothing and feature detection: ground, building, poles, trees, vehicles. Created specialized filtering for paint stripe detection, parking stripes, colored areas, road lane lines and road markings. Parallel processing using Intel TBB and OpenMP.

Languages: C++, GLSL

Build Tools: Visual Studio 2022

Platforms: Windows

Framework: Win API/ATL/Shell, Qt

Libraries: STL, OpenGL, LASLib, PCL, PDAL, Open3D, Intel TBB, boost

View Slide Show

3D Surface Model Editing/Viz

Surface model editing: point, edge, merging, cropping, smoothing. Automated surface texturing tool and 3D scene creation with animation. 3D scene visualization tools. Solid modeling tools.

Project Details

Surface model editing: point, edge, merging, cropping, smoothing. Solid modeling. Automated surface texturing tool and 3D scene creation with animation.

Languages: C++, GLSL

Build Tools: Visual Studio 2022

Platforms: Windows

Framework: Win API/ATL/Shell, Qt

Libraries: STL, OpenGL, LASLib, PCL, PDAL, Open3D, Intel TBB, boost

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GLTF/GLB Shell Extension

In Windows File Explorer, right click on GLTF/GLB files to produce quick thumbnail images.

Project Details

This Windows shell extension automatically adds thumbnail images to .glb files in Windows File Explorer. It also provides a right click menu option to generate a 3D preview images for .gltf files. Supports multi-file select and directory processing.

Pre-built Windows x64 installer

Languages: C++, C#

Build Tools: Visual Studio 2022

Platforms: Windows

Framework: Win API/ATL/Shell, .net

Libraries: MS GLTF SDK, Open3D, Intel TBB

Source Code

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LandXMLto GLTF Shell Extension

In Windows File Explorer, right click on LandXML .xml files to produce a 3D GLTF file. Works for LandXML 1.0 to 2.0 .xml files containing surfaces with optional textures.

Project Details

Console application that is re-used as a Windows shell extension. A Windows Registry script adds a File Explorer right-click custom menu entry, "Convert to GLTF", for .xml files

Pre-built Windows x64 installer

Languages: C++

Build Tools: CMake, VS Studio 2022, gcc, XCode

Platforms: Windows, Linux, MacOS

Framework: Windows Shell/Registry

Libraries: STL, Microsoft GLTF SDK, TinyXML

Source Code

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Web UI Components

Re-usable, CSS stylable, responsive, pure javascript browser UI components: pop-up message box, slide show and command/action toolbar.

Project Details

Re-usable, CSS stylable, responsive, pure javascript browser UI components: pop-up message box, slide show and command/action toolbar.

Languages: JavaScript, HTML, CSS

Build Tools: Chrome, Edge, Safari

Platforms: all desktop and mobile browsers

Framework: DOM JavaScript

SlideShow Source

Message Source

View Slide Show

Photo Mapper Server

Simple mapping of photos with GPS data. Drag and drop photo image files onto the 2D or 3D map or choose files to map. Uses backend rendering code. Supports desktop/laptop/mobile browsers.

Project Details

Client/server photo mapping image processing. Re-uses 90% of client-only Photo Map code. Image processing runs in NodeJS CGI.

Languages: JavaScript, HTML, CSS

Build Tools: Chrome, Edge, Safari

Platforms: all desktop and mobile browsers

Framework: DOM JavaScript, NodeJS, CGI

Libraries: TinyJSON, EXIFReader

Source Code

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