This is a helper for drawing simple geometric shapes including texture coordinates and surface normals.

• Cube
• Sphere
• GeoSphere
• Cylinder
• Torus
• Teapot

Initialization

The GeometryPrimitive class must be created from a factory method which takes the Direct3D 11 device context.

For exception safety, it is recommended you make use of the C++ RAII pattern and use a std::unique_ptr or std::shared_ptr

• CreateCube( deviceContext, float size = 1)
• CreateSphere( deviceContext, float diameter = 1, size_t tessellation = 16)
• CreateGeoSphere( deviceContext, float diameter = 1, size_t tessellation = 3)
• CreateCylinder( deviceContext, float height = 1, float diameter = 1, size_t tessellation = 32)
• CreateTorus( deviceContext, float diameter = 1, float thickness = 0.333f, size_t tessellation = 32)
• CreateTeapot( deviceContext, float size = 1, size_t tessellation = 8)

Simple drawing

The draw method accepts an optional texture parameter, wireframe flag, and a callback function which can be used to override the default rendering state:

Coordinate Systems

The geometric primitives created by default are set up for 'counter-clockwise' winding for rendering with right-handed projection matrices. There is an optional parameter that can be passed to make the rendering use 'clockwise' backface culling for use with left-handed projection matrices.

Threading model

Each GeometricPrimitive instance only supports drawing from one thread at a time, but you can simultaneously submit primitives on multiple threads if you create a separate GeometricPrimitive instance per Direct3D 11 deferred context.
http://msdn.microsoft.com/en-us/library/windows/desktop/ff476892.aspx