SIMD-Accelerated 3D Boundary Representation (B-Rep) Tolerances & STEP Interop in Swift

When building cross-platform scientific and engineering visualization tools, one critical bottleneck is evaluating geometric boundary representation (B-Rep) tolerances across disparate modeling kernels (such as Siemens Parasolid's 1e-4mm linear limit versus Dassault ACIS's 1e-6mm precision). We have been exploring utilizing Swift's native simd framework (SIMD3<Double> and vectorized matrix transforms) to accelerate vertex-snapping and surface-surface intersection (SSI) validation before convert...