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Avoid writeImageVtk modifying the input Img object. #18

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Avoid writeImageVtk modifying the input Img object. #18

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10 changes: 7 additions & 3 deletions src/geone/img.py
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Original file line number Diff line number Diff line change
Expand Up @@ -6468,7 +6468,8 @@ def writeImageVtk(
name of the file

missing_value : float, optional
`numpy.nan` value will be replaced by `missing_value` before writing
`numpy.nan` value will be replaced by `missing_value` if provided.
Otherwise, `numpy.nan` will be used.

fmt : str, default: '%.10g'
format for single variable value, `fmt` is a string of the form
Expand Down Expand Up @@ -6513,15 +6514,18 @@ def writeImageVtk(
im.nxyz(),
'/'.join(im.varname), data_type, im.nv)

# Save data into a separate array, otherwise the img will be modified
data = np.copy(im.val)

# Replace np.nan by missing_value
if missing_value is not None:
np.putmask(im.val, np.isnan(im.val), missing_value)
np.putmask(data, np.isnan(data), missing_value)

# Open the file in write binary mode
with open(filename,'wb') as ff:
ff.write(shead.encode())
# Write variable values
np.savetxt(ff, im.val.reshape(im.nv, -1).T, delimiter=' ', fmt=fmt)
np.savetxt(ff, data.reshape(im.nv, -1).T, delimiter=' ', fmt=fmt)
# ----------------------------------------------------------------------------

# ----------------------------------------------------------------------------
Expand Down