Engineering Architecture & Mathematical Design
Declarative system specification: floating-point conditioning, LocalMetricFrame formulation, and deterministic native core.
LocalMetricFrame (LMF) Formulation
Mitigating IEEE 754 floating-point cancellation in high-magnitude cartographic reference frames.
The Cartographic Coordinate Challenge
Global projected coordinate systems (such as UTM or Gauss-Boaga) operate with magnitudes reaching 10^6 to 10^7 meters. Under standard IEEE 754 double precision (53-bit mantissa), subtracting close coordinates at large magnitudes induces significant catastrophic cancellation, losing critical precision bits.
Barycentric Local Translation
QismaCAD's architectural design introduces LocalMetricFrame. By translating the computational origin to the geometric centroid of the project boundary, coordinates are normalized to localized metric vectors, preserving numeric conditioning within machine precision.
P_local = R(theta) * (P_global - P_origin) Where P_origin is the geometric centroid anchor and R(theta) is the optional boundary orientation tensor.
Planar Topology & Boolean Core
Robust computational geometry primitives designed for land boundary evaluation.
Topological Closure & Orientation
All input rings are normalized to strict counter-clockwise winding for exterior boundaries and clockwise for interior holes. Non-manifold vertices are isolated deterministically.
Exact Boolean Decomposition
Polygon clipping and splitting algorithms operate on planar topological invariants, eliminating zero-area slivers and micro-gap artifacts.
Geodetic & Coordinate Reference Systems
Architectural handling of international and national coordinate datums.
The architecture separates global geodetic anchoring from local metric drafting. Projected coordinates (UTM, Gauss-Boaga, national grid systems) are transformed through rigorous forward/inverse projection models prior to geometric optimization.
Layered Desktop Architecture
High-performance boundary between TypeScript UI and Rust native core.
Presentation Layer (TypeScript)
Lightweight, reactive drafting interface handling user input, visual styling, and AST constraint authoring without blocking computational threads.
Serialization Bridge (Tauri IPC)
High-throughput binary serialization boundary passing typed commands and geometry buffers between the frontend and native core.
Computational Core (Rust)
Memory-safe deterministic execution: geometry processing, Delaunay triangulation, and multi-objective Pareto optimization compiled natively.
Design Specification Notice
This technical document details the architectural design and mathematical principles implemented by construction. Official verification and capability status certification reside in the QismaCAD Software repository.