from __future__ import annotations
from pathlib import Path
from typing import List, Union
from .extendable import Extendable
from .tile_content import TileContent
[docs]
class Tile(Extendable):
def __init__(self, geometric_error=500, bounding_volume=None, refine_mode="ADD"):
super().__init__()
self.bounding_volume = bounding_volume
self.geometric_error = geometric_error
self._refine = ""
self.set_refine_mode(refine_mode)
self._content = None
self._children = []
# Some possible valid properties left un-delt with viewerRequestVolume
self._transform = None
[docs]
def set_content(self, content: TileContent, force=True) -> None:
if not force and self._content is not None:
return
self._content = content
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def get_content(self) -> TileContent:
return self._content
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def set_content_uri(self, uri: str) -> None:
if self._content is None:
raise AttributeError('Tile with unset content.')
# self._content.set_uri(uri) # TODO add set_uri in TileContent
[docs]
def get_content_uri(self) -> str:
if self._content is None:
raise AttributeError('Tile with unset content.')
# return self._content.get_uri() # TODO add get_uri in TileContent
return ""
[docs]
def set_refine_mode(self, mode: str) -> None:
if mode != 'ADD' and mode != 'REPLACE':
raise ValueError(f"Unknown refinement mode {mode}. Should be either 'ADD' or 'REPLACE'.")
self._refine = mode
[docs]
def get_refine_mode(self) -> str:
return self._refine
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def add_child(self, tile: Tile) -> None:
self._children.append(tile)
[docs]
def has_children(self) -> bool:
return len(self._children) != 0
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def get_direct_children(self) -> List[Tile]:
return self._children
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def get_children(self) -> List[Tile]:
"""
:return: the recursive (across the children tree) list of the children
tiles
"""
descendants = []
for child in self._children:
# Add the child...
descendants.append(child)
# and if (and only if) they are grand-children then recurse
if child.has_children():
descendants += child.get_children()
return descendants
[docs]
def sync_bounding_volume_with_children(self) -> None:
if self.bounding_volume is None:
raise AttributeError('This Tile has no bounding volume: exiting.')
if not self.bounding_volume.is_box():
raise NotImplementedError("Don't know how to sync non box bounding volume.")
# We consider that whatever information is present it is the
# proper one (in other terms: when they are no sub-tiles this tile
# is a leaf-tile and thus is has no synchronization to do)
for child in self.get_direct_children():
child.sync_bounding_volume_with_children()
# The information that depends on (is defined by) the children
# nodes is limited to be bounding volume.
self.bounding_volume.sync_with_children(self)
[docs]
def write_content(self, directory: Path) -> None:
"""
Write (or overwrite) the tile _content_ to the directory specified
as parameter and withing the relative filename designated by
the tile's content uri. Note that it is the responsibility of the
owning TileSet to
- set those uris
- to explicitly invoke write_content() (this is to be opposed with
the Tile attributes which get serialized when recursing on the
TileSet attributes)
:param directory: the target directory
"""
file_name = self.get_content_uri()
if not file_name:
raise AttributeError("Tile with no content or no uri in content.")
path_name = directory / file_name
# Make sure the output directory exists (note that target_dir may
# be a sub-directory of 'directory' because the uri might hold its
# own path):
path_name.parent.mkdir(parents=True, exist_ok=True)
# Write the tile content of this tile:
with path_name.open('wb') as f:
f.write(self.get_content().to_array())
[docs]
def to_dict(self) -> dict:
dict_data = {}
if self.bounding_volume is not None:
bounding_volume = self.bounding_volume
else:
raise AttributeError('Bounding volume is not set')
dict_data['boundingVolume'] = bounding_volume.to_dict()
dict_data['geometricError'] = self.geometric_error
if self._children:
# The children list exists indeed (for technical reasons) yet it
# happens to be still empty. This would pollute the json output
# by adding a "children" entry followed by an empty list. In such
# case just remove that attributes entry:
dict_data['children'] = [child.to_dict() for child in self._children]
if self._content is not None:
# Refer to children related above comment (mutatis mutandis):
dict_data['content'] = self._content
return dict_data