Module layers 

Loosely coupled layers, that together define shapes

See Layers.

Modules

geometry

Layer infrastructure for Geometry

objects

Layer infrastructure for Objects

presentation

Layer infrastructure for Presentation

validation

Layer infrastructure for Validation

Structs

Layer

A generic layer, which controls access to layer state

Layers

Loosely coupled layers, that together define shapes

Traits

Command

A command that encodes a request to update a layer’s state

Event

An event that encodes a change to a layer’s state