API Reference > geometry-core > Solid > CurvePrimitiveMutator CurvePrimitiveMutator Type alias type for a function argument taking 2 curves and returning another curve or failing with undefined. This is used (for instance) by RuleSweep.mutatePartners CurvePrimitiveMutator = (primitiveA: CurvePrimitive, primitiveB: CurvePrimitive) => CurvePrimitive | undefined Defined in core/geometry/src/solid/RuledSweep.ts Line 27 Last Updated: 13 June, 2024