technical_drawings_extraction/venv/lib/python3.7/site-packages/ezdxf/modern/helix.py

# Created: 08.04.2018
# Copyright (c) 2018, Manfred Moitzi
# License: MIT-License
from .graphics import ExtendedTags, DXFAttr, DefSubclass, DXFAttributes, XType
from .graphics import none_subclass, entity_subclass
from .spline import Spline, spline_subclass

_HELIX_CLS = """  0
CLASS
1
HELIX
2
AcDbHelix
3
ObjectDBX Classes
90
4095
91
0
280
0
281
1
"""

_HELIX_TPL = """0
HELIX
5
0
330
0
100
AcDbEntity
8
0
100
AcDbSpline
70
0
71
3
72
0
73
0
74
0
100
AcDbHelix
90
29
91
63
10
0.0
20
0.0
30
0.0
11
1.0
21
0.0
31
0.0
12
0.0
22
0.0
32
1.0
40
1.0
41
1.0
42
1.0
290
1
280
1
"""

helix_subclass = DefSubclass('AcDbHelix', {
    'major_release_number': DXFAttr(90),
    'maintenance_release_number': DXFAttr(91),
    'axis_base_point': DXFAttr(10, xtype=XType.point3d),
    'start_point': DXFAttr(11, xtype=XType.point3d),
    'axis_vector': DXFAttr(12, xtype=XType.point3d),
    'radius': DXFAttr(40),
    'turns': DXFAttr(41),
    'turn_height': DXFAttr(42),
    'handedness': DXFAttr(290),  # Handedness: 0=left, 1=right
    'constrain': DXFAttr(280),  # Constrain type: 0= Constrain turn height; 1= Constrain turns; 2= Constrain height
})


class Helix(Spline):
    # Requires AC1021/R2007
    __slots__ = ()
    TEMPLATE = ExtendedTags.from_text(_HELIX_TPL)
    DXFATTRIBS = DXFAttributes(none_subclass, entity_subclass, spline_subclass, helix_subclass)
    CLASS = ExtendedTags.from_text(_HELIX_CLS)