# Topology Context Data

Structure and bitmasks for specifying the topology context and common attributes such as granularity, tolerance, and thickness.

> 2.0

Entity type is `kA3DTypeTopoContext`

> `A3DTopoContext`, `A3DTopoContextData`, `A3DTopoContextGet()`, `A3DTopoContextCreate()`

## Index

Preprocessor Definitions

- `kA3DContextOuterLoopFirst`
- `kA3DContextNoClamp`
- `kA3DContextNoSplit`
- `kA3DContextHasAnalytics`

Structures

- `A3DTopoContextData`

Preprocessor Definitions

`kA3DContextOuterLoopFirst`

  Outer loops are always first loops.

`kA3DContextNoClamp`

  UV Curves are clamped on surface.

`kA3DContextNoSplit`

  Faces are split.

`kA3DContextHasAnalytics`

  B-rep can contain analytic elements (not exclusively BSpline).

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