<commit_before># Copyright (c) 2020-2021, <NAME>
# License: MIT License
from typing import (
    TYPE_CHECKING, List, Iterable, Tuple, Optional, Dict, Sequence,
)

import math
import itertools
from ezdxf.math import (
    Vec3, Z_AXIS, OCS, Matrix44, BoundingBox, ConstructionEllipse,
    cubic_bezier_from_ellipse, Bezier4P, Bezier3P, BSpline,
    reverse_bezier_curves, bulge_to_arc,
)

from ezdxf.query import EntityQuery

from .path import Path
from .commands import Command
from . import converter

if TYPE_CHECKING:
    from ezdxf.eztypes import Vertex, Layout, EntityQuery

__all__ = [
    'bbox', 'fit_paths_into_box', 'transform_paths', 'transform_paths_to_ocs',
    'render_lwpolylines', 'render_polylines2d', 'render_polylines3d',
    'render_lines', 'render_hatches', 'render_splines_and_polylines',
    'add_bezier4p', 'add_bezier3p', 'add_ellipse', 'add_2d_polyline',
    'add_spline', 'to_multi_path', 'single_paths'
]

MAX_DISTANCE = 0.01
MIN_SEGMENTS = 4
G1_TOL = 1e-4
IS_CLOSE_TOL = 1e-10


def to_multi_path(paths: Iterable[Path]) -> Path:
    """Returns a multi-path object from all given paths and their sub-paths.

    .. versionadded:: 0.17

    """
    multi_path = Path()
    for p in paths:
        multi_path.extend_multi_path(p)
    return multi_path


def single_paths(paths: Iterable[Path]) -> Iterable[Path]:
    """Yields all given paths and their sub-paths as single path objects.

    .. versionadded:: 0.17

    """
    for p in paths:
        if p.has_sub_paths:
            yield from p.sub_paths()
        else:
            yield p


def transform_paths(paths: Iterable[Path], m: Matrix44) -> List[Path]:
    """ Transform multiple :class:`Path` objects at once by transformation
    matrix `m`. Returns a list of the transformed :class:`Path` objects.

    Args:
        paths: iterable of :class:`Path` objects
        m: transformation matrix of type :class:`~ezdxf.math.Matrix44`

    """

    def decompose(path: Path):
        vertices.append(path.start)
        commands.append(Command.START_PATH)
        for cmd in path:
            commands.extend(itertools.repeat(cmd.type, len(cmd)))
            vertices.extend(cmd)

    def rebuild(vertices):
        path = None
        collect = []
        for vertex, cmd in zip(vertices, commands):
            if cmd == Command.START_PATH:
                if path is not None:
                    transformed_paths.append(path)
                path = Path(vertex)
            elif cmd == Command.LINE_TO:
                path.line_to(vertex)
            elif cmd == Command.CURVE3_TO:
                collect.append(vertex)
                if len(collect) == 2:
                    path.curve3_to(collect[0], collect[1])
                    collect.clear()
            elif cmd == Command.CURVE4_TO:
                collect.append(vertex)
                if len(collect) == 3:
                    path.curve4_to(collect[0], collect[1], collect[2])
                    collect.clear()
            elif cmd == Command.MOVE_TO:
                path.move_to(vertex)

        if path is not None:
            transformed_paths.append(path)

    vertices = []
    commands = []
    transformed_paths = []

    for path in paths:
        decompose(path)
    if len(commands):
        rebuild(m.transform_vertices(vertices))
    return transformed_paths


def transform_paths_to_ocs(paths: Iterable[Path], ocs: OCS) -> List[Path]:
    """ Transform multiple :class:`Path` objects at once from WCS to OCS.
    Returns a list of the transformed :class:`Path` objects.

    Args:
        paths: iterable of :class:`Path` objects
        ocs: OCS transformation of type :class:`~ezdxf.math.OCS`<commit_msg>optimize transform_paths() by localizing variables<commit_after># Copyright (c) 2020-2021, <NAME>
# License: MIT License
from typing import (
    TYPE_CHECKING, List, Iterable, Tuple, Optional, Dict, Sequence,
)

import math
import itertools
from ezdxf.math import (
    Vec3, Z_AXIS, OCS, Matrix44, BoundingBox, ConstructionEllipse,
    cubic_bezier_from_ellipse, Bezier4P, Bezier3P, BSpline,
    reverse_bezier_curves, bulge_to_arc,
)

from ezdxf.query import EntityQuery

from .path import Path
from .commands import Command
from . import converter

if TYPE_CHECKING:
    from ezdxf.eztypes import Vertex, Layout, EntityQuery

__all__ = [
    'bbox', 'fit_paths_into_box', 'transform_paths', 'transform_paths_to_ocs',
    'render_lwpolylines', 'render_polylines2d', 'render_polylines3d',
    'render_lines', 'render_hatches', 'render_splines_and_polylines',
    'add_bezier4p', 'add_bezier3p', 'add_ellipse', 'add_2d_polyline',
    'add_spline', 'to_multi_path', 'single_paths'
]

MAX_DISTANCE = 0.01
MIN_SEGMENTS = 4
G1_TOL = 1e-4
IS_CLOSE_TOL = 1e-10


def to_multi_path(paths: Iterable[Path]) -> Path:
    """Returns a multi-path object from all given paths and their sub-paths.

    .. versionadded:: 0.17

    """
    multi_path = Path()
    for p in paths:
        multi_path.extend_multi_path(p)
    return multi_path


def single_paths(paths: Iterable[Path]) -> Iterable[Path]:
    """Yields all given paths and their sub-paths as single path objects.

    .. versionadded:: 0.17

    """
    for p in paths:
        if p.has_sub_paths:
            yield from p.sub_paths()
        else:
            yield p


def transform_paths(paths: Iterable[Path], m: Matrix44) -> List[Path]:
    """ Transform multiple :class:`Path` objects at once by transformation
    matrix `m`. Returns a list of the transformed :class:`Path` objects.

    Args:
        paths: iterable of :class:`Path` objects
        m: transformation matrix of type :class:`~ezdxf.math.Matrix44`

    """

    def decompose(path: Path):
        vertices.append(path.start)
        commands.append(Command.START_PATH)
        for cmd in path:
            commands.extend(itertools.repeat(cmd.type, len(cmd)))
            vertices.extend(cmd)

    def rebuild(vertices):
        # localize variables:
        start_path, line_to, curve3_to, curve4_to, move_to = Command

        path = None
        collect = []
        for vertex, cmd in zip(vertices, commands):
            if cmd == start_path:
                if path is not None:
                    transformed_paths.append(path)
                path = Path(vertex)
            elif cmd == line_to:
                path.line_to(vertex)
            elif cmd == curve3_to:
                collect.append(vertex)
                if len(collect) == 2:
                    path.curve3_to(collect[0], collect[1])
                    collect.clear()
            elif cmd == curve4_to:
                collect.append(vertex)
                if len(collect) == 3:
                    path.curve4_to(collect[0], collect[1], collect[2])
                    collect.clear()
            elif cmd == move_to:
                path.move_to(vertex)

        if path is not None:
            transformed_paths.append(path)

    vertices = []
    commands = []
    transformed_paths = []

    for path in paths:
        decompose(path)
    if len(commands):
        rebuild(m.transform_vertices(vertices))
    return transformed_paths


def transform_paths_to_ocs(paths: Iterable[Path], ocs: OCS) -> List[Path]:
    """ Transform multiple :class:`Path` objects at once from WCS to OCS.
    Returns a list of the transformed :class:`Path` objects.

    Args:
        paths: iterable of :class:`Path` objects
        ocs: OCS transformation of type :class:`~ezdxf.math.OCS`
{'fraction_non_alphanumeric': 0.1028801071667783, 'fraction_numerical': 0.013395847287340924, 'mean_word_length': 2.5501664289110795, 'pattern_counts': {'":': 0, '<': 5, '<?xml version=': 0, '>': 13, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
{'dir': 'git-commits-cleaned', 'id': '4590863', 'n_tokens_mistral': 2417, 'n_tokens_neox': 2306, 'n_words': 601}