3D Architect & CAD Pipelines

The Brainstorm Reactor CAD suite transforms technical specifications into verified, interactively controllable Three.js geometries and FDM-printable solid models. Two specialized, complementary recipes provide distinct construction paradigms.

1. Two Complementary CAD Paradigms

2. Common Host Contract & Interface

Both pipelines enforce a strict separation between the host application shell and the algorithmic code payload:

• Normative Interface: Exactly one pure function: buildModel(THREE, params) -> { group, title, paramDefs }.
• Parameter Normalization: Mandatory inclusion of the canonical normalizeParameter(def) helper to enforce bounds clamping, lattice stepping, and floating-point sanitation.
• Print-Bed Alignment (Y=0): Objects are bed-leveled at Y=0 in right-handed Three.js world space (+Y up, dimensions in millimeters).
• Self-Contained Execution: No external imports, dynamic network calls, DOM access, or global state mutations.

3. Volumetric Multi-Agent Cascade (v2)

[1. Intent Compiler] ──> [2. Topology Architect] ──> [3. Parameter Lead]
                                                            │
                                                            ▼
[6. 3D Render] <── VERDICT: APPROVED <── [5. QA Validator] <── [4. Three.js Engineer]
                                                │                    ▲
                                                └──── VERDICT: ──────┘
                                                      REVISE (max 2 loops)

1. Step 1: Intent & Contract Compiler (SLOT_SYNTHESIS, silent): Deconstructs requirements into an unambiguous DesignSpec, identifying physical features, assembly mode (fused, separate-parts, print-in-place), and observable acceptance predicates.
2. Step 2: Spatial & Topology Architect (SLOT_SYNTHESIS, visible): Architects the volumetric topology and material boundaries (GeometryPlan). Allocates features to parts using approved strategies (conforming cell boundaries, multi-plane extrusions, sweeps). Overlapping un-unioned primitives are strictly rejected.
3. Step 3: Parameter & Manufacturing Lead (SLOT_SYNTHESIS, visible): Defines the slider-safe parameter domain (ParameterContract), establishing independent versus dependent dimensions, wall thickness bounds (≥ 1.2 mm), and critical test vectors.
4. Step 4: Three.js Implementation Agent (SLOT_SYNTHESIS, visible): Implements the raw JavaScript buildModel(THREE, params) function. If repairing, executes surgical fixes addressing specific QA defect findings.
5. Step 5: Independent QA Validator (SLOT_SYNTHESIS, silent): Audits the candidate code deterministically across the 8-gate volumetric ladder:
   • G0 (Integrity): Single AST declaration, zero external dependencies, approved API surface.
   • G1 (Host Contract): Strict { group, title, paramDefs } return, r160 compatibility, exact normalizer helper.
   • G2 (Scene & Triangles): Ordinary meshes with BufferGeometry, finite coordinates, positive transform determinants.
   • G3 (Material Boundary): Closed edges, opposite edge traversal, outward winding, non-zero volume.
   • G4 (Interactions & Fidelity): No overlapping shells claimed as union, real cavities, assembly clearances.
   • G5 (Parameter Domain): Slider-safe bounds, non-inverting topology across all tested extremes.
   • G6 (Manufacturing & FDM): Minimum wall thickness, bed contact stability, support accessibility.
   • G7 (Export & Slicing): STL export roundtrip, non-degenerate triangle parsing.
6. Step 6: Release & 3D Render (SLOT_3D, visible): Transfers verified code to the Spatial Canvas for real-time 3D interaction, parameter tuning, and binary STL manufacturing export.

4. Model Recommendations (Slot Allocation)

For reliable mathematical topology decomposition, FDM constraint satisfaction, and multi-gate code synthesis, models from the Top 5 or the High End Reasoning category are required for the code synthesis slots.

• Synthesis Slots (Steps 1–5 — SLOT_SYNTHESIS): Erfordert Modelle der Kategorie „High End Reasoning“ (Top 5 Modelle) für verlässliche Geometrieberechnung, Parameternormierung und FDM-Auditing.
• 3D Viewport Slot (Step 6 — SLOT_3D): Host-seitige Ausführung im interaktiven Spatial Canvas mit Three.js r160 Viewport und STL-Export.