96 lines
2.9 KiB
Python
96 lines
2.9 KiB
Python
# Copyright (c) 2019-2022 Manfred Moitzi
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# License: MIT License
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from __future__ import annotations
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from typing import TYPE_CHECKING, Optional
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from ezdxf.lldxf import validator
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from ezdxf.lldxf.attributes import (
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DXFAttr,
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DXFAttributes,
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DefSubclass,
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XType,
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RETURN_DEFAULT,
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group_code_mapping,
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)
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from ezdxf.lldxf.const import SUBCLASS_MARKER, DXF2000
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from ezdxf.math import Vec3, Matrix44, NULLVEC, Z_AXIS
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from .dxfentity import base_class, SubclassProcessor
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from .dxfgfx import DXFGraphic, acdb_entity
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from .factory import register_entity
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if TYPE_CHECKING:
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from ezdxf.entities import DXFNamespace
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from ezdxf.lldxf.tagwriter import AbstractTagWriter
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__all__ = ["Ray", "XLine"]
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acdb_xline = DefSubclass(
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"AcDbXline",
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{
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"start": DXFAttr(10, xtype=XType.point3d, default=NULLVEC),
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"unit_vector": DXFAttr(
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11,
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xtype=XType.point3d,
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default=Z_AXIS,
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validator=validator.is_not_null_vector,
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fixer=RETURN_DEFAULT,
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),
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},
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)
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acdb_xline_group_codes = group_code_mapping(acdb_xline)
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@register_entity
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class XLine(DXFGraphic):
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"""DXF XLINE entity"""
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DXFTYPE = "XLINE"
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DXFATTRIBS = DXFAttributes(base_class, acdb_entity, acdb_xline)
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MIN_DXF_VERSION_FOR_EXPORT = DXF2000
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XLINE_SUBCLASS = "AcDbXline"
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def load_dxf_attribs(
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self, processor: Optional[SubclassProcessor] = None
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) -> DXFNamespace:
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dxf = super().load_dxf_attribs(processor)
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if processor:
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processor.fast_load_dxfattribs(
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dxf, acdb_xline_group_codes, subclass=2, recover=True
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)
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return dxf
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def export_entity(self, tagwriter: AbstractTagWriter) -> None:
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"""Export entity specific data as DXF tags."""
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super().export_entity(tagwriter)
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tagwriter.write_tag2(SUBCLASS_MARKER, self.XLINE_SUBCLASS)
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self.dxf.export_dxf_attribs(tagwriter, ["start", "unit_vector"])
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def transform(self, m: Matrix44) -> XLine:
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"""Transform the XLINE/RAY entity by transformation matrix `m` inplace."""
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self.dxf.start = m.transform(self.dxf.start)
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self.dxf.unit_vector = m.transform_direction(
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self.dxf.unit_vector
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).normalize()
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self.post_transform(m)
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return self
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def translate(self, dx: float, dy: float, dz: float) -> XLine:
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"""Optimized XLINE/RAY translation about `dx` in x-axis, `dy` in
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y-axis and `dz` in z-axis.
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"""
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self.dxf.start = Vec3(dx, dy, dz) + self.dxf.start
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# Avoid Matrix44 instantiation if not required:
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if self.is_post_transform_required:
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self.post_transform(Matrix44.translate(dx, dy, dz))
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return self
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@register_entity
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class Ray(XLine):
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"""DXF Ray entity"""
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DXFTYPE = "RAY"
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DXFATTRIBS = DXFAttributes(base_class, acdb_entity, acdb_xline)
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MIN_DXF_VERSION_FOR_EXPORT = DXF2000
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XLINE_SUBCLASS = "AcDbRay"
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