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CextensionManager* extensionManager = CextensionManager::instance();
CgeometryProceduralExtension* geomProcExtension = extensionManager->createGeometryProceduralExtension( "MaxwellParticles" );
//Get the extension container. When using this method of getting the container,
//nearly all parameters have default values, and there is no need to explicitly set them.
MXparamList* particlesParams = geomProcExtension->getExtensionData();

//Fill the required data
char* filename = "/home/rocco/Emitter01_00023.bin";
particlesParams->setString( "FileName", filename );

//Enable loading particle densities data
byte load = 1;
particlesParams->setByte( "Load particle Density", load );

//These two numbers can be obtained parsing the particles file or all the particles sequence
//They're needed to map the values of densitiesvelocities from 0.0 to 1.0 to access the texture.
float minDminV = 0.190;
float maxDmaxV = 123.67;
particlesParams->setFloat( "Min DensityVelocity", minDminV );
particlesParams->setFloat( "Max DensityVelocity", maxDmaxV );

//GetAdd the numberprocedural ofobject customto generators available
byte numCustomUVGenerators = geomProcPlugin->getNumberOfUVGenerators();the scene
Cmaxwell::Cobject obj = scene->createGeometryProceduralObject( "My Particles", particlesParams );

dword uvIndex;//Let´s add a uv channel...
dword uvIndex;//returned uv channel index. Use this index in the texture map properties to access its uv's
byte isOk = obj.addChannelUVW( uvIndex );= obj.addChannelUVW( uvIndex ); // uvIndex will be set to the actual uv channel number of the object.
//...and set it to a custom UV generator, 3, in this case, velocity modulus
obj.generateCustomUVW( uvIndex, 343 );//343 is the type of the custom uv generator.

//Now assign a material and set the first BSDF reflectance0º color a texture driven by uv channel 'uvIndex'
 

//This uv channel, since it is a one-valued channel, stores its value in the U coordinate.