Cannot regrid generic grids

[chaosphere2112]

import cdms2, vcs

f = cdms2.open(vcs.sample_data + "/sampleGenGrid3.nc")
f2 = cdms2.open(vcs.sample_data + "/clt.nc")
sample = f("sample")
clt = f("clt")
sample.regrid(clt.getGrid())

raises:

/Users/fries2/anaconda/envs/cdat_widgets/lib/python2.7/site-packages/cdms2/avariable.pyc in regrid(self, togrid, missing, order, mask, **keywords)
   1128                             dstGridMask = None,
   1129                             dstGridAreas = None,
-> 1130                             **keywords)
   1131             # now interpolate
   1132             return ro(self, **keywords)

/Users/fries2/anaconda/envs/cdat_widgets/lib/python2.7/site-packages/cdms2/mvCdmsRegrid.pyc in __init__(self, srcGrid, dstGrid, dtype, regridMethod, regridTool, srcGridMask, srcGridAreas, dstGridMask, dstGridAreas, **args)
    337         self.dstGrid = dstGrid
    338 
--> 339         srcCoords = _getCoordList(srcGrid)
    340         dstCoords = _getCoordList(dstGrid)
    341 

/Users/fries2/anaconda/envs/cdat_widgets/lib/python2.7/site-packages/cdms2/mvCdmsRegrid.pyc in _getCoordList(grid)
    216 
    217         # have axes, need to convert to curvilinear grid
--> 218         cgrid = grid.toCurveGrid()
    219 
    220         lats = cgrid.getLatitude()

AttributeError: 'TransientGenericGrid' object has no attribute 'toCurveGrid'

This is because the TransientGenericGrid object has no function to convert to a TransientCurveGrid. I tried switching toCurveGrid() to toGenericGrid(), but that leads to a lot of weird errors.

[durack1]

@dnadeau4 @chaosphere2112 the ocean grids are a particularly good test target for this.. See CDAT/cdat#1707, CDAT/cdat#819 and CDAT/cdat#402 - these may be dupes if the grid issues are correctly resolved

[chaosphere2112]

@durack1 Yup, I'm trying to plot MPAS data right now 😄

[durack1]

@chaosphere2112 let me know if you want a bunch of the CMIP5 ocean grid data, adding these to the test suite will ensure that the software is up-to-date with at least the latest (circa ~2012) grid info

[chaosphere2112]

The sample I provided should hopefully be enough for @dnadeau4 to make it so the generic grids can even get to the regridding stage; more data would be good for more rigorous testing once we've gotten to that point.

[durack1]

@chaosphere2112 @dnadeau4 no problem, when you get to that stage tap me again (here) and I'll generate the other test data