Function ApplyCCLibAlgorithm

qCC/ccLibAlgorithms.cpp:425–595

	bool ApplyCCLibAlgorithm(CC_LIB_ALGORITHM algo, ccHObject::Container& entities, QWidget* parent/*=nullptr*/, void** additionalParameters/*=nullptr*/)
	{
		size_t selNum = entities.size();
		if (selNum < 1)
			return false;
		
		//generic parameters
		QString sfName;

		//computeScalarFieldGradient parameters
		bool euclidean = false;
		
		switch (algo)
		{
			case CCLIB_ALGO_SF_GRADIENT:
			{
				sfName = CC_GRADIENT_NORMS_FIELD_NAME;
				//parameters already provided?
				if (additionalParameters)
				{
					euclidean = *static_cast<bool*>(additionalParameters[0]);
				}
				else //ask the user!
				{
					euclidean = (	QMessageBox::question(parent,
																	 "Gradient",
																	 "Is the scalar field composed of (euclidean) distances?",
																	 QMessageBox::Yes | QMessageBox::No,
																	 QMessageBox::No ) == QMessageBox::Yes );
				}
			}
			break;
				
			default:
				assert(false);
				return false;
		}
		
		for (size_t i = 0; i < selNum; ++i)
		{
			//is the ith selected data is eligible for processing?
			ccGenericPointCloud* cloud = nullptr;
			switch (algo)
			{
				case CCLIB_ALGO_SF_GRADIENT:
					//for scalar field gradient, we can apply it directly on meshes
					bool lockedVertices;
					cloud = ccHObjectCaster::ToGenericPointCloud(entities[i], &lockedVertices);
					if (lockedVertices)
					{
						ccUtils::DisplayLockedVerticesWarning(entities[i]->getName(), selNum == 1);
						cloud = nullptr;
					}
					if (cloud)
					{
						//but we need an already displayed SF!
						if (cloud->isA(CC_TYPES::POINT_CLOUD))
						{