def path(self) -> Optional[Path]:
""" Create path representation on demand.
:class:`Path` can not represent a point, a :class:`Path` with only a
start point yields not vertices!
"""
if self._path is None:
self._path = Path(self.entity.dxf.location)
return self._path
def _convert_entity(self):
""" Calculates the rough border path for a single line text.
Calculation is based on a mono-spaced font and therefore the border
path is just an educated guess.
Vertical text generation and oblique angle is ignored.
"""
def get_text_rotation() -> float:
if alignment in ('FIT', 'ALIGNED') and not p1.isclose(p2):
return (p2 - p1).angle
else:
return math.degrees(text.dxf.rotation)
def get_insert() -> Vec3:
if alignment == 'LEFT':
return p1
elif alignment in ('FIT', 'ALIGNED'):
return p1.lerp(p2, factor=0.5)
else:
return p2
text = cast('Text', self.entity)
if text.dxftype() == 'ATTDEF':
# ATTDEF outside of a BLOCK renders the tag rather than the value
content = text.dxf.tag
else:
content = text.dxf.text
content = plain_text(content)
if len(content) == 0:
# empty path - does not render any vertices!
self._path = Path()
return
p1: Vec3 = text.dxf.insert
p2: Vec3 = text.dxf.align_point
font = fonts.make_font(get_font_name(text), text.dxf.height,
text.dxf.width)
text_line = TextLine(content, font)
alignment: str = text.get_align()
if text.dxf.halign > 2: # ALIGNED=3, MIDDLE=4, FIT=5
text_line.stretch(alignment, p1, p2)
halign, valign = unified_alignment(text)
corner_vertices = text_line.corner_vertices(get_insert(),
halign, valign,
get_text_rotation())
ocs = text.ocs()
self._path = Path.from_vertices(
ocs.points_to_wcs(corner_vertices),
close=True,
)
def _convert_entity(self):
""" Calculates the rough border path for a MTEXT entity.
Calculation is based on a mono-spaced font and therefore the border
path is just an educated guess.
Most special features of MTEXT is not supported.
"""
def get_content() -> List[str]:
text = mtext.plain_text(split=False)
return text_wrap(text, box_width, font.text_width)
def get_max_str() -> str:
return max(content, key=lambda s: len(s))
def get_rect_width() -> float:
if box_width:
return box_width
s = get_max_str()
if len(s) == 0:
s = " "
return font.text_width(s)
def get_rect_height() -> float:
line_height = font.measurements.total_height
cap_height = font.measurements.cap_height
# Line spacing factor: Percentage of default (3-on-5) line
# spacing to be applied.
# thx to mbway: multiple of cap_height between the baseline of the
# previous line and the baseline of the next line
# 3-on-5 line spacing = 5/3 = 1.67
line_spacing = cap_height * mtext.dxf.line_spacing_factor * 1.67
spacing = line_spacing - line_height
line_count = len(content)
return line_height * line_count + spacing * (line_count - 1)
def get_ucs() -> UCS:
""" Create local coordinate system:
origin = insertion point
z-axis = extrusion vector
x-axis = text_direction or text rotation, text rotation requires
extrusion vector == (0, 0, 1) or treatment like an OCS?
"""
origin = mtext.dxf.insert
z_axis = mtext.dxf.extrusion # default is Z_AXIS
x_axis = X_AXIS
if mtext.dxf.hasattr('text_direction'):
x_axis = mtext.dxf.text_direction
elif mtext.dxf.hasattr('rotation'):
# TODO: what if extrusion vector is not (0, 0, 1)
x_axis = Vec3.from_deg_angle(mtext.dxf.rotation)
z_axis = Z_AXIS
return UCS(origin=origin, ux=x_axis, uz=z_axis)
def get_shift_factors():
halign, valign = unified_alignment(mtext)
shift_x = 0
shift_y = 0
if halign == const.CENTER:
shift_x = -0.5
elif halign == const.RIGHT:
shift_x = -1.0
if valign == const.MIDDLE:
shift_y = 0.5
elif valign == const.BOTTOM:
shift_y = 1.0
return shift_x, shift_y
def get_corner_vertices() -> Iterable[Vec3]:
""" Create corner vertices in the local working plan, where
the insertion point is the origin.
"""
rect_width = mtext.dxf.get('rect_width', get_rect_width())
rect_height = mtext.dxf.get('rect_height', get_rect_height())
# TOP LEFT alignment:
vertices = [
Vec3(0, 0),
Vec3(rect_width, 0),
Vec3(rect_width, -rect_height),
Vec3(0, -rect_height)
]
sx, sy = get_shift_factors()
shift = Vec3(sx * rect_width, sy * rect_height)
return (v + shift for v in vertices)
mtext: "MText" = cast("MText", self.entity)
box_width = mtext.dxf.get('width', 0)
font = fonts.make_font(get_font_name(mtext), mtext.dxf.char_height,
1.0)
content: List[str] = get_content()
if len(content) == 0:
# empty path - does not render any vertices!
self._path = Path()
return
ucs = get_ucs()
corner_vertices = get_corner_vertices()
self._path = Path.from_vertices(
ucs.points_to_wcs(corner_vertices),
close=True,
)
