void SphereEmitter::Emit(const float gameTime,
const unsigned int availableIndiceCount, physx::PxParticleCreationData& creationData)
{
unsigned int emissionCount(GetEmissionCount(gameTime, availableIndiceCount));
//If we have creation data and indices can be used
if(emissionCount > 0)
{
//reset forces
forces.clear();
positions.clear();
RandomNumberGenerator* random = RandomNumberGenerator::GetInstance();
//Generate initial force and update available indices
for (unsigned int i = 0; i < emissionCount; i++)
{
float ranSpeed = random->GenerateRandom(minSpeed, maxSpeed);
physx::PxVec3 ranDirection = physx::PxVec3(
random->GenerateRandom(minimumDirection.x, maximumDirection.x),
random->GenerateRandom(minimumDirection.y, maximumDirection.y),
random->GenerateRandom(minimumDirection.z, maximumDirection.z));
if(EmitFromShell)
positions.push_back(position + (ranDirection * Radius));
else
positions.push_back(position + (ranDirection * random->GenerateRandom(0.0f, Radius)));
if(TowardsSphereCenter)
forces.push_back(-ranDirection * ranSpeed);
else
forces.push_back(ranDirection * ranSpeed);
}
//set creation data parameters
creationData.numParticles = emissionCount;
creationData.positionBuffer = physx::PxStrideIterator<physx::PxVec3>(&positions[0]);
creationData.velocityBuffer = physx::PxStrideIterator<physx::PxVec3>(&forces[0]);
}
}
