Using the Eigen library in CUDA kernels
Eigen is a fantastic library, which since version 3.3 can be used inside CUDA kernels.
This MWE shows the calculation of a sum of dot products using a std::vector<Eigen::Vector3d>.
The USE_CUDA macro switches from the regular C++ (CPU) implementation to the CUDA implementation.
CMake is used to configure the build and CORE_USE_CUDA can be used to switch between implementations.