Implement the Proper Interface

Note that OpenNI has a different interface for a node implementation (MPI) than the actual API of the node. Although they seem superficially very similar, the MPI and API interfaces are different.

The module's MPI interfaces (C++ ones) are defined in file XnModuleCppInterface.h.

The following table lists current OpenNI node types and their module interface.

Node Type	Module Interface
Production Node	xn::ModuleProductionNode
Device	xn::ModuleDevice
Generator	xn::ModuleGenerator
Recorder	xn::ModuleRecorder
Player	xn::ModulePlayer
Map Generator	xn::ModuleMapGenerator
Depth Generator	xn::ModuleDepthGenerator
Image Generator	xn::ModuleImageGenerator
IR Generator	xn::ModuleIRGenerator
Gestures Generator	xn::ModuleGestureGenerator
Scene Analyzer	xn::ModuleSceneAnalyzer
Hands Generator	xn::ModuleHandsGenerator
User Generator	xn::ModuleUserGenerator
Audio Generator	xn::ModuleAudioGenerator
Codec	xn::ModuleCodec
Script	xn::ModuleScriptNode

When you want to create a new class, it must inherit virtually from the corresponding interface. For example, if you are developing a hand generator, the class declaration must be as follows:

class MyHandGenerator: public virtual xn::ModuleHandsGenerator
{
...
};