Deterministic geometry means the same inputs always produce the same outputs — no solver approximations, no ambiguity, no silent changes between versions.
Deterministic geometry means every geometric operation executes a fixed mathematical formula. The result is computed in a single pass — no iteration, no convergence, no tolerance accumulation.
In a deterministic system: the same inputs always produce the same outputs — on any machine, any software version, any time. This is the opposite of constraint-based CAD systems where the solver state can produce different results depending on the history of operations.