Reference the axis of a rotating Geometry for custom factory (EDEM API Tutorial 6: Snooker Factory)

Hi, 

I've been using the Edem API Tutorial 6 to get a feeling for custom factories. So far I have:

• adjusted the code to create particles every 0.2 seconds at a fixed location on the table
• with a Z-Velocity of 1.0 (gravity off) 
• adjusted code is attached below

I am now rotating the table (could be any other geometry) along the X-axis and I want the particles to reference the rotating Z-Axis of the table and spawn along that Z-direction. The Particle are spawning along the local/global? Z-Axis currently (see attached image)

It would be very useful if someone could name some API/Classes/Methods in the documentation to look for. Or any other suggestions to handle this problem.

Some ideas of mine:

• Reference the coordinates of the table with some getMethod()? or the initial velocity of the rotation with getVelocity()?
• Calculate the normal to a rotating object, and set the direction of the velocity of the particles to that normal

I appreciate all suggestions.

Semih

// Calculate number of iteration int numIteration = 0; // spawn a particle every after time double timerStep = 0.0; // [s]  NApi::ECalculateResult CSnooker::createParticle( 	double  time, 	double  timestep, 	bool& particleCreated, 	bool& additionalParticleRequired, 	char    type[NApi::API_BASIC_STRING_LENGTH], 	double& scale, 	double& posX, 	double& posY, 	double& posZ, 	double& velX, 	double& velY, 	double& velZ, 	double& angVelX, 	double& angVelY, 	double& angVelZ, 	double  orientation[9], 	NApiCore::ICustomPropertyDataApi_1_0* propData, 	NApiCore::ICustomPropertyDataApi_1_0* simData) { 	if (time > 9 || m_numberCreated >= 100) 	{ 		particleCreated = false; 		additionalParticleRequired = false; 		return eSuccess; 	} 	if (timerStep - time < 1e-04) { 		// Mark that we are creating a particle 		particleCreated = true;  		// Set some fixed values for all particles we create 		velX = 0.0; 		velY = 0.0; 		velZ = 0.0;  		angVelX = 0.0; 		angVelY = 0.0; 		angVelZ = 0.0;  		for (unsigned int i = 0; i < 9; i++) 		{ 			orientation[i] = 0.0; 		}  		scale = 1.0;  		// Z position is the same for all aprticles (just above the table 		// X and Y vary 		posZ = 0.025;  		strncpy(type, "red", API_BASIC_STRING_LENGTH); 		posZ = 0.1; 		posX = 1; 		posY = 0.5; 		velZ = 1.0;  		// Mark the particle as created 		m_numberCreated++; 		timerStep += 0.2;  		// We are creating 21 particles, if we've done them all 		// then no more are required 		additionalParticleRequired = (100 != m_numberCreated); 		return eSuccess; 	} 	else { 		// timerStep += 0.1; 	} 	// Count the number of iteration 	numIteration++; }