CGAL 5.6.3 - 2D and 3D Linear Geometry Kernel

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Kernel::NonZeroCoordinateIndex_3 Concept Reference
2D and 3D Linear Geometry Kernel Reference » Concepts » Kernel Function Object Concepts

## Definition

Refines
  `AdaptableUnaryFunction`

## Operations
A model of this concept must provide:
int | operator() (const Kernel::Vector_3 &v)
| returns any of `0`, `1`, or `2` if the corresponding coordinate of the vector `v` is not equal to zero, and `-1` if `v` is the null vector.