581ee4dc0a
Covers 6 mainstream CAD engines across 6 dimensions: - B-Rep modeling maturity - Surface modeling capabilities - Assembly management - Drawing/PMI generation - Data exchange formats - Performance and architecture Key findings: - VDE covers ~60% of OCCT core capabilities - Already ahead in parallelization, differentiable geometry, modern C++ - Main gaps: boolean robustness (30yr polish), ecosystem (350+ apps) - Unique advantages: Apache 2.0, C++17, zero runtime deps, Chinese-first