def copy_volume(self, existing_volume, starts=None, sizes=None):
"""create a Volume object by copying an existing Volume
Usage: copy_volume(existing_volume [, start=(s0,s1, ...), sizes=(n0,n1,...)])
Arguments:
Volume : existing_volume
start : extract a subvolume starting at given voxel (optional)
size : extract a subvolume of given dimensions (optional)
"""
if hasattr(self, 'volume_io_obj'):
raise RuntimeError, \
'volume_io_obj can only be created by a constructor'
if existing_volume.__class__ is not Volume:
raise TypeError, ("Cannot create volume of type %s from type Volume."
+ " Try copy='definition' instead.") \
% existing_volume.__class
# copy the whole volume
if starts is None and sizes is None:
self.volume_io_obj = VolumeIO_a.copy_volume(
existing_volume.volume_io_obj)
# or copy only a subvolume
else:
Volume._copy_sub_volume_definition_no_alloc(
self, existing_volume, starts, sizes)
VolumeIO_a.alloc_volume_data(self.volume_io_obj)
hyperslab = VolumeIO._get_real_subvolume(
existing_volume.volume_io_obj, tuple(starts), tuple(sizes))
VolumeIO._set_real_subvolume(self.volume_io_obj, (0, ) *
existing_volume.get_n_dimensions(),
hyperslab)
if self.volume_io_obj is None:
raise RuntimeError
self._copy_attributes(existing_volume.attributes)
def copy_volume(self, existing_volume, starts=None, sizes=None):
"""create a Volume object by copying an existing Volume
Usage: copy_volume(existing_volume [, start=(s0,s1, ...), sizes=(n0,n1,...)])
Arguments:
Volume : existing_volume
start : extract a subvolume starting at given voxel (optional)
size : extract a subvolume of given dimensions (optional)
"""
if hasattr(self, 'volume_io_obj'):
raise RuntimeError, \
'volume_io_obj can only be created by a constructor'
if existing_volume.__class__ is not Volume:
raise TypeError, ("Cannot create volume of type %s from type Volume."
+ " Try copy='definition' instead.") \
% existing_volume.__class
# copy the whole volume
if starts is None and sizes is None:
self.volume_io_obj = VolumeIO_a.copy_volume(existing_volume.volume_io_obj)
# or copy only a subvolume
else:
Volume._copy_sub_volume_definition_no_alloc(self, existing_volume, starts, sizes)
VolumeIO_a.alloc_volume_data(self.volume_io_obj)
hyperslab = VolumeIO._get_real_subvolume(existing_volume.volume_io_obj,
tuple(starts), tuple(sizes))
VolumeIO._set_real_subvolume(self.volume_io_obj,
(0,) * existing_volume.get_n_dimensions(),
hyperslab)
if self.volume_io_obj is None:
raise RuntimeError
self._copy_attributes(existing_volume.attributes)
def get_hyperslab(self, start, size, typecode=numpy.float_):
"get an n dimensional array of real values from the volume"
return self._cast(VolumeIO._get_real_subvolume(self.volume_io_obj,
tuple(start), tuple(size)), typecode)
def get_hyperslab(self, start, size, typecode=numpy.float_):
"get an n dimensional array of real values from the volume"
return self._cast(
VolumeIO._get_real_subvolume(self.volume_io_obj, tuple(start),
tuple(size)), typecode)