def _set_up_coordinate_component_links(self, ndim):
def make_toworld_func(i):
def pix2world(*args):
return self.coords.pixel2world_single_axis(*args[::-1],
axis=ndim - 1 - i)
return pix2world
def make_topixel_func(i):
def world2pix(*args):
return self.coords.world2pixel_single_axis(*args[::-1],
axis=ndim - 1 - i)
return world2pix
result = []
for i in range(ndim):
link = CoordinateComponentLink(self._pixel_component_ids,
self._world_component_ids[i],
self.coords, i)
result.append(link)
link = CoordinateComponentLink(self._world_component_ids,
self._pixel_component_ids[i],
self.coords,
i,
pixel2world=False)
result.append(link)
self._coordinate_links = result
return result
def _load_coordinate_component_link(rec, context):
to = list(map(context.object, rec['to']))[0] # XXX why is this a list?
coords = context.object(rec['coords'])
index = rec['index']
pix2world = rec['pix2world']
frm = list(map(context.object, rec['frm']))
return CoordinateComponentLink(frm, to, coords, index, pix2world)
def coordinate_links(self):
"""A list of the ComponentLinks that connect pixel and
world. If no coordinate transformation object is present,
return an empty list.
"""
if self._coordinate_links:
return self._coordinate_links
if not self.coords:
return []
if self.ndim != len(self._pixel_component_ids) or \
self.ndim != len(self._world_component_ids):
# haven't populated pixel, world coordinates yet
return []
def make_toworld_func(i):
def pix2world(*args):
return self.coords.pixel2world_single_axis(*args[::-1],
axis=self.ndim - 1 -
i)
return pix2world
def make_topixel_func(i):
def world2pix(*args):
return self.coords.world2pixel_single_axis(*args[::-1],
axis=self.ndim - 1 -
i)
return world2pix
result = []
for i in range(self.ndim):
link = CoordinateComponentLink(self._pixel_component_ids,
self._world_component_ids[i],
self.coords, i)
result.append(link)
link = CoordinateComponentLink(self._world_component_ids,
self._pixel_component_ids[i],
self.coords,
i,
pixel2world=False)
result.append(link)
self._coordinate_links = result
return result
