Demo App: OCCTSwift Playground with CadQuery-style scripting

[gsdali]

Overview

Create a demo/showcase application for OCCTSwift that provides:

• Text-based modeling input using CadQuery-inspired JavaScript syntax
• 3D visualization using ViewportKit (RealityKit)
• Cross-platform support for iOS and macOS

Architecture

Text Input → JavaScriptCore → OCCTSwift → Mesh → ViewportKit

Why JavaScriptCore?

Approach	iOS Support	Complexity	Dependencies
JavaScriptCore	✅ Built-in	Medium	None
PythonKit	❌ macOS only	Low	Python runtime
Custom Parser	✅	High	None

API Example

// CadQuery-inspired syntax
result = Workplane("XY")
    .box(10, 20, 5)
    .faces(">Z")
    .hole(3)
    .edges("|Z")
    .fillet(1)

Phases

• Demo App Phase 1: MVP - JavaScriptCore Bridge & Basic Operations #26 Phase 1: MVP - Basic shapes, booleans, modifications (~5 days)
• Demo App Phase 2: Workplanes & Selectors #27 Phase 2: Workplanes & Selectors (~5 days)
• Demo App Phase 3: Polish, Examples & Export #28 Phase 3: Polish & Examples (~4 days)

Total estimated effort: ~14 days

Documentation

See docs/DEMO_APP_PROPOSAL.md for full technical details.

Dependencies

• OCCTSwift v0.14.0+
• ViewportKit v1.0.0+