def _generate_v2(point_group,
camera,
points,
start_frame=None,
undistort=False):
"""
Generate the UV file format contents, using JSON format.
:param point_group: The 3DE Point Group containing 'points'
:type point_group: str
:param camera: The 3DE Camera containing 2D 'points' data.
:type camera: str
:param points: The list of 3DE Points representing 2D data to
save.
:type points: list of str
:param start_frame: The frame number to be considered at
'first frame'. Defaults to 1001 if
set to None.
:type start_frame: None or int
:param undistort: Should we apply undistortion to the 2D points
data? Yes or no.
:type undistort: bool
Each point will store:
- Point name
- X, Y position (in UV coordinates, per-frame)
- Point weight (per-frame)
- Point Set name
- Point 'Persistent ID'
"""
assert isinstance(point_group, basestring)
assert isinstance(camera, basestring)
assert isinstance(points, (list, tuple))
assert start_frame is None or isinstance(start_frame, int)
assert isinstance(undistort, bool)
if start_frame is None:
start_frame = 1001
data = UV_TRACK_HEADER_VERSION_2.copy()
cam_num_frames = tde4.getCameraNoFrames(camera)
if len(points) == 0:
return ''
frame0 = int(start_frame)
frame0 -= 1
data['num_points'] = len(points)
data['is_undistorted'] = bool(undistort)
data['points'] = []
for point in points:
point_data = {}
# Query point information
name = tde4.getPointName(point_group, point)
uid = None
if SUPPORT_PERSISTENT_ID is True:
uid = tde4.getPointPersistentID(point_group, point)
point_set = tde4.getPointSet(point_group, point)
point_set_name = None
if point_set is not None:
point_set_name = tde4.getSetName(point_group, point_set)
point_data['name'] = name
point_data['id'] = uid
point_data['set_name'] = point_set_name
# Write per-frame position data
frame = 1 # 3DE starts at frame '1' regardless of the 'start frame'.
point_data['per_frame'] = []
pos_block = tde4.getPointPosition2DBlock(point_group, point, camera, 1,
cam_num_frames)
for pos in pos_block:
if pos[0] == -1.0 or pos[1] == -1.0:
# No valid data here.
frame += 1
continue
# Does the 2D point go outside the camera FOV? Is that ok?
valid_2d = tde4.isPointPos2DValid(point_group, point, camera,
frame)
if valid_2d != 1:
# No valid data here.
frame += 1
continue
f = frame + frame0
if undistort is True:
pos = tde4.removeDistortion2D(camera, frame, pos)
weight = 1.0
if SUPPORT_POINT_WEIGHT_BY_FRAME is True:
weight = tde4.getPointWeightByFrame(point_group, point, camera,
frame)
frame_data = {'frame': f, 'pos': pos, 'weight': weight}
point_data['per_frame'].append(frame_data)
frame += 1
data['points'].append(point_data)
data_str = json.dumps(data)
return data_str
def _generate_v2_v3_and_v4(point_group,
camera,
points,
version=None,
**kwargs):
"""
Generate the UV file format contents, using JSON format.
Set the individual _generate_v2 or _generate_v3 functions for
details of what is stored.
:param point_group: The 3DE Point Group containing 'points'
:type point_group: str
:param camera: The 3DE Camera containing 2D 'points' data.
:type camera: str
:param points: The list of 3DE Points representing 2D data to
save.
:type points: list of str
:param version: The version of file to generate,
UV_TRACK_FORMAT_VERSION_2 or
UV_TRACK_FORMAT_VERSION_3.
:type version: int
:param start_frame: Format v2 and v3; The frame number to be
considered at 'first frame'.
Defaults to 1001 if set to None.
:type start_frame: None or int
:param undistort: Format v2; Should we apply undistortion to the 2D
points data? Yes or no.
:type undistort: bool
:returns: A JSON format string, with the UV Track data in it.
:rtype: str
"""
assert isinstance(point_group, basestring)
assert isinstance(camera, basestring)
assert isinstance(points, (list, tuple))
assert isinstance(version, (int, long))
assert version in [
UV_TRACK_FORMAT_VERSION_2, UV_TRACK_FORMAT_VERSION_3,
UV_TRACK_FORMAT_VERSION_4
]
start_frame = kwargs.get('start_frame')
assert start_frame is None or isinstance(start_frame, int)
if start_frame is None:
start_frame = 1001
undistort = None
if version == UV_TRACK_FORMAT_VERSION_2:
undistort = kwargs.get('undistort')
assert isinstance(undistort, bool)
data = None
if version == UV_TRACK_FORMAT_VERSION_2:
data = UV_TRACK_HEADER_VERSION_2.copy()
elif version == UV_TRACK_FORMAT_VERSION_3:
data = UV_TRACK_HEADER_VERSION_3.copy()
elif version == UV_TRACK_FORMAT_VERSION_4:
data = UV_TRACK_HEADER_VERSION_4.copy()
else:
raise ValueError("Version number is invalid; %r" % version)
cam_num_frames = tde4.getCameraNoFrames(camera)
camera_fov = tde4.getCameraFOV(camera)
if len(points) == 0:
return ''
frame0 = int(start_frame)
frame0 -= 1
data['num_points'] = len(points)
data['is_undistorted'] = None
if version == UV_TRACK_FORMAT_VERSION_2:
data['is_undistorted'] = bool(undistort)
data['points'] = []
for point in points:
point_data = {}
# Query point information
name = tde4.getPointName(point_group, point)
uid = None
if SUPPORT_PERSISTENT_ID is True:
uid = tde4.getPointPersistentID(point_group, point)
point_set = tde4.getPointSet(point_group, point)
point_set_name = None
if point_set is not None:
point_set_name = tde4.getSetName(point_group, point_set)
point_data['name'] = name
point_data['id'] = uid
point_data['set_name'] = point_set_name
valid_mode = _get_point_valid_mode(point_group, point)
# Get the 3D point position
if version in [UV_TRACK_FORMAT_VERSION_3, UV_TRACK_FORMAT_VERSION_4]:
point_data['3d'] = _get_3d_data_from_point(point_group, point)
# Write per-frame position data
frame = 1 # 3DE starts at frame '1' regardless of the 'start frame'.
point_data['per_frame'] = []
pos_block = tde4.getPointPosition2DBlock(point_group, point, camera, 1,
cam_num_frames)
for pos in pos_block:
if pos[0] == -1.0 or pos[1] == -1.0:
# No valid data here.
frame += 1
continue
# Is the 2D point obscured?
valid = tde4.isPointPos2DValid(point_group, point, camera, frame)
if valid == 0:
# No valid data here.
frame += 1
continue
# Check if we're inside the FOV / Frame or not.
valid_pos = _is_valid_position(pos, camera_fov, valid_mode)
if valid_pos is False:
frame += 1
continue
pos_undist = pos
if undistort is True or undistort is None:
pos_undist = tde4.removeDistortion2D(camera, frame, pos)
weight = _get_point_weight(point_group, point, camera, frame)
f = frame + frame0
frame_data = {'frame': f, 'pos': pos_undist, 'weight': weight}
if version in [
UV_TRACK_FORMAT_VERSION_3, UV_TRACK_FORMAT_VERSION_4
]:
frame_data['pos_dist'] = pos
point_data['per_frame'].append(frame_data)
frame += 1
data['points'].append(point_data)
if version == UV_TRACK_FORMAT_VERSION_4:
lens = tde4.getCameraLens(camera)
data['camera'] = _generate_camera_data(camera, lens, frame0)
data_str = json.dumps(data)
return data_str