fine_to_coarse interpolation

[seanconverge]

During develop my own CFD code based on AMReX, I want to transfer the data on the fine level to the coarse level with biquadratic
formula. However, I only find the amrex::average_down function is emoloyed in the example codes, and I didn't see any related functions in the src. Are there some fine_to_coarse functions can be used?

Thanks in advance.

[WeiqunZhang]

You can implement what you need following the example of average_down functions.

Those average_down functions are usually sufficient for many AMReX application codes because for finite-volume methods the states are cell averaged values (even for high-order say 4th-order), and for finite-difference methods we can put the states on nodes instead of cell centers.

[seanconverge]

Thanks for your reply. I will have a try following the example of average_down functions.