Construction Software Brief

August 19, 2026

Weekly Construction Software Briefing

Pacific Glazing Corporation — Internal Briefing Prepared for: Steve Watts, CEO Date: August 19, 2026

1. Executive Summary

The open-source AEC stack has reached production maturity, with web-ifc logging over 107,000 weekly npm downloads and browser-based BIM review tools displacing legacy per-seat licensing. For PGC, the most immediate opportunity is eliminating the $500/year Bluebeam dependency through ThatOpen Engine and xeokit—tools that run entirely in-browser with zero installation. Meanwhile, incumbent vendors Autodesk and Bentley are openly releasing client-side tools to drive cloud platform adoption, signaling that file-format lock-in is no longer their primary defense. The window for first-mover advantage in open-source glazing automation is 12–18 months.

2. Top 10 Software Developments

#	Tool	What It Does	Relevance to PGC	Link
1	web-ifc	JavaScript library for reading, writing, and querying IFC files natively in the browser or Node.js. Enables programmatic access to curtain wall panels, spandrel dimensions, and property sets.	Foundation for custom glazing takeoff automation—replaces need for Navisworks or Revit license just to extract data.	https://github.com/tommypanny/web-ifc
2	ThatOpen Engine	Browser-based BIM viewer with markup, annotation, and version-controlled review capabilities. v3.4.x is production-ready.	Direct Bluebeam replacement for submittal workflows. Run entirely in Chrome—no per-seat licensing.	https://github.com/ThatOpen/
3	xeokit	High-performance 3D BIM viewer optimized for large models. v2.7.1 adds WebGPU rendering for complex curtain wall geometries.	Complements ThatOpen for heavy-model review; useful for facade coordination with architects.	https://github.com/xeokit/xeokit-sdk
4	OpenDroneMap	Open-source photogrammetry pipeline that converts drone imagery into survey-grade point clouds, digital elevation models, and orthomosaics.	Displaces $5,000+/year photogrammetry vendor for site documentation and as-built capture.	https://github.com/OpenDroneMap/OpenDroneMap
5	CloudCompare	Point cloud processing and comparison tool. Handles multi-source scan registration and delta analysis.	Replaces $10,000+/year FARO or Leica software for verifying installed glazing against design models.	https://github.com/CloudCompare/CloudCompare
6	PascalOrg/Editor	Next.js + React Three Fiber browser-based 3D editor with 21,546 GitHub stars. Signals web-native CAD crossing usability threshold.	Potential SketchUp replacement for concept facade studies—no desktop install required.	https://github.com/PascalOrg/Editor
7	Assimp	Universal 3D format converter supporting 40+ formats including IFC, OBJ, FBX, STEP. 13,141 stars.	Normalizes non-standard model inputs from architects or fabricators before glazing calculations.	https://github.com/assimp/assimp
8	CGAL	Computational Geometry Algorithms Library. Handles boolean operations, surface meshing, and area calculations. 6,010 stars.	Core engine for building PDF takeoff tool—computes panel quantities from scanned drawings.	https://github.com/CGAL/cgal
9	LibreCAD	Open-source 2D CAD application reading and writing DXF/DWG. 6,254 stars.	Processes shop drawings from fabricators; bridges proprietary formats into takeoff workflow.	https://github.com/LibreCAD/LibreCAD
10	OpenProject	Open-source project management with Gantt charts, issue tracking, and BCF (BIM Collaboration Format) support.	Reduces Procore dependency; enables self-hosted project tracking with full data ownership.	https://github.com/opf/openproject

3. Open Source Spotlight

A. ThatOpen Engine + xeokit (Browser-Based BIM Review)

What it is: Two complementary open-source tools that together replace Bluebeam for submittal workflows. ThatOpen provides the annotation and markup layer; xeokit handles high-performance 3D rendering of complex geometries.

Maturity: Production-ready (v3.4.x and v2.7.1 respectively). Active community with 2,000+ Discord members.

Setup Complexity: Low. Both run entirely in-browser with no server required for basic use. A self-hosted deployment requires a basic Node.js environment, completable in an afternoon.

PGC Workflow Fit: Submittal review, RFI markup, and facade coordination meetings—no per-seat license, accessible from any device.

Try It: https://platform.thatopen.com or https://xeokit.github.io/xeokit-sdk/

B. OpenDroneMap + CloudCompare (As-Built Documentation Stack)

What it is: OpenDroneMap processes raw drone imagery into point clouds and orthomosaics. CloudCompare performs change detection and dimensional verification against design models.

Maturity: Mature. OpenDroneMap has 6,386 stars and is used by surveying firms globally. CloudCompare (4,674 stars) is the de facto standard for open point cloud analysis.

Setup Complexity: Medium. OpenDroneMap requires Docker or a Linux environment (or cloud deployment via WebODM). CloudCompare is a desktop install on Windows/macOS/Linux.

PGC Workflow Fit: Capture site conditions for curtain wall installation planning; verify as-built dimensions against shop drawings.

Try It: https://www.opendronemap.org/ and https://www.danielgm.net/cc/

C. CGAL + LibreCAD (PDF Takeoff Engine — 2027 Priority)

What it is: CGAL provides the geometric algorithms (boolean operations, area calculations) needed to extract quantities from PDF drawings. LibreCAD reads DXF/DWG shop drawings to extract panel dimensions.

Maturity: CGAL is 25+ years old—battle-tested in academic and industrial applications. LibreCAD is stable but less active.

Setup Complexity: High for custom development. Requires C++ expertise to integrate CGAL into a production workflow. Consider using pre-built bindings or partnering with a development shop.

PGC Workflow Fit: Automated quantity takeoff from scanned PDFs and fabricator drawings—the largest unresolved gap in the current open-source stack.

Why It Matters: Bluebeam commands $400M+ in annual revenue for this workflow. First-mover advantage in an open-source replacement is available now.

Try It: https://www.cgal.org/ and https://librecad.org/

4. Try It This Week

These tools require minimal setup and provide immediate value for PGC workflows:

web-ifc (Browser Sandbox)
- What: Query an IFC file for glazing-specific data—panel dimensions, U-values, property sets—without opening Revit or Navisworks.
- How: Open https:// IFCjs.github.io/web-ifc/ and load any sample IFC file. Filter for "CurtainWall" or "Panel" entities.
- Time Required: 30 minutes.
- Owner: Lead Estimator or IT.
ThatOpen Engine (Submittal Review Pilot)
- What: Upload a current submittal PDF or IFC model and practice markup with the team.
- How: Sign up at https://platform.thatopen.com; import a live project file.
- Time Required: 1 hour.
- Owner: Project Manager or field supervisor.
xeokit (Large Model Viewer)
- What: Test rendering a complex curtain wall model in the browser to assess performance against current workstation setup.
- How: Visit https://xeokit.github.io/xeokit-sdk/examples/ and load the "BCF" or "IfcLoader" example with your own model.
- Time Required: 30 minutes.
- Owner: BIM Coordinator.
CloudCompare (As-Built Verification)
- What: Compare a drone scan from a recent project against the design model to identify installation deviations.
- How: Download CloudCompare at https://www.danielgm.net/cc/; import both the point cloud and the IFC model.
- Time Required: 2–3 hours for first use.
- Owner: Field Engineer or QC lead.

5. Ones to Watch

These projects are early-stage but showing strong momentum. Not for immediate adoption—monitor for maturity.

Project	Why Watch	Current Status
MCP (Model Context Protocol)	Emerging standard for AI agents to access CAD/BIM data. If adopted, enables text-to-CAD workflows ("Generate a curtain wall panel schedule from this IFC").	Specification finalized; client libraries in early development. Monitor for Autodesk/Bentley adoption.
Bentley `@bentley/construction-schema v1.0.4`	Bentley's explicit open-source move signals that proprietary schema lock-in is over. Watch for integration opportunities with iTwin platform.	Released Q2 2026; ecosystem still forming.
Procore `@procore/bim-webviewer-sdk v17.8.0`	Procore's web BIM viewer SDK signals that major GCs are opening their platforms. Reduces switching costs for PGC if Procore becomes the project hub.	Production-ready; used by large GCs already.

Key Takeaways for Steve Watts

Act Now: ThatOpen + xeokit can displace Bluebeam within 90 days. The cost savings ($500/seat/year) are immediate and the workflow disruption is minimal.
Build the Foundation: web-ifc is the keystone for all downstream automation. Even a basic internal demo this quarter will clarify PGC's long-term software strategy.
Capture Site Data: OpenDroneMap on one pilot project this quarter will generate the as-built library needed to train future AI models and win scope disputes.
Watch the Incumbents: Autodesk and Bentley are releasing free client tools to protect cloud platform revenue. This is the lowest-risk path to competitive advantage—integrate where it adds value, but own your data.

Next briefing scheduled: August 26, 2026