About updating density and velocity about fluidx3d

[ProjectPhysX]

Hi @tyrafluid! By default, density and velocity are not updated during time marching. Only when you call lbm.update_fields(); in main_setup() explicitly, they are updated in GPU memory, and a subsequent lbm.rho.read_from_device();/lbm.u.read_from_device(); brings them in CPU memory to evaluate by accessing lbm.rho[n]/lbm.u.x[n]/lbm.u.y[n]/lbm.u.z[n].

If you want density and velocity do be updated during time marching, you can add the line #define UPDATE_FIELDS somewhere in src/defines.hpp.

[tyrafluid]

Thank you @ProjectPhysX
I want to know how to read the your code. First of all, I would like to learn the structure of your code. Could you teach me ?