CyprienBosserelle/xbeach_gpu

Wave height producing all 0's for small grid

dgreer1 opened this issue · 1 comments

Using an example grid that has 420 x 840 cells, the model works fine (top image in attached pic). When using a reduced grid dimensions, the model output starts to produce all 0's for Hs. This happens once the dimensions fall below 420 x 262 (bottom image in attached pic.

xbeach_comparison

Example files attached.

XB.zip

Hi @dgreer1,
I figured it out. Rather then a problem with XBGPU I think it is a problem with your md file generator (and mine ).
My writemd() function had a round off error that makes it write a md file with (nx-1) by ny but the header still says nx-ny.

I tried to make a grid with nx =420 but my function only wrote 419 values making XBGPU incapable of reading the file correctly.
this is because (floor(nx/11)*11+(nx/11-floor(nx/11))*11) = 419.9999999999 which is truncated to 419...

See my Julia function here. it should be easy to apply a similar fix on your function.