# ##### BEGIN GPL LICENSE BLOCK ##### # # This program is free software; you can redistribute it and/or # modify it under the terms of the GNU General Public License # as published by the Free Software Foundation; either version 2 # of the License, or (at your option) any later version. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program; if not, write to the Free Software Foundation, # Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. # # ##### END GPL LICENSE BLOCK ##### # from mathutils import Vector _MESH_ENTITIES = frozenset(["POLYFACE", "POLYMESH", "MESH", "POINT", "3DFACE", "SOLID", "TRACE"]) def mesh_entity(entity): return entity.dxftype in _MESH_ENTITIES def mesh(typestr): return typestr in _MESH_ENTITIES _POLYS = frozenset(["LWPOLYLINE", "POLYLINE"]) def closed_poly_no_bulge(entity): return entity.dxftype in _POLYS and not any([b != 0 for b in entity.bulge]) and entity.is_closed _CURVE_ENTITIES = frozenset(("POLYLINE", "POLYGON", "LWPOLYLINE", "SPLINE", "CIRCLE", "ARC", "ELLIPSE", "LINE", "HELIX")) def curve_entity(entity): return entity.dxftype in _CURVE_ENTITIES def curve(typestr): return typestr in _CURVE_ENTITIES _NURBS_ENTITIES = frozenset(("BODY", "REGION", "PLANESURFACE", "SURFACE", "3DSOLID")) def nurbs_entity(entity): return entity.dxftype in _NURBS_ENTITIES def nurbs(typestr): return typestr in _NURBS_ENTITIES _TEXT_ENTITIES = frozenset(("MTEXT", "TEXT")) def text_entity(entity): return entity.dxftype in _TEXT_ENTITIES def text(typestr): return typestr in _TEXT_ENTITIES def insert_entity(entity): return entity.dxftype == "INSERT" def insert(typestr): return typestr == "INSERT" def light_entity(entity): return entity.dxftype == "LIGHT" def light(typestr): return typestr == "LIGHT" def attrib(entity): return entity.dxftype == "ATTDEF" def attrib(typestr): return typestr == "ATTDEF" _2D_ENTITIES = frozenset(("CIRCLE", "ARC", "SOLID", "TRACE", "TEXT", "ATTRIB", "ATTDEF", "SHAPE", "INSERT", "LWPOLYLINE", "HATCH", "IMAGE", "ELLIPSE")) def _2D_entity(entity): return entity.dxftype in _2D_ENTITIES or (entity.dxftype == "POLYGON" and entity.mode == "spline2d") def varying_width(entity): if hasattr(entity, "width"): ew = entity.width if hasattr(ew, "__iter__"): if len(ew) == 0: return False else: return ew.count(ew[0]) != len(ew) or ew[0][0] != ew[0][1] return False _SEPERATED_ENTITIES = frozenset(("POLYFACE", "POLYMESH", "LIGHT", "MTEXT", "TEXT", "INSERT", "BLOCK")) def separated_entity(entity): """ Indicates if the entity should be imported to one single Blender object or if it can be merged with other entities. This depends not only on the type of a dxf-entity but also whether the width values are varying or all the same. """ return entity.dxftype in _SEPERATED_ENTITIES or varying_width(entity) def separated(typestr): return typestr in _SEPERATED_ENTITIES _NOT_COMBINED_ENTITIES = frozenset(tuple(_SEPERATED_ENTITIES) + ("ATTDEF",)) def combined_entity(entity): return not separated_entity(entity) and not entity.dxftype == "ATTDEF" def combined(typestr): return typestr not in _NOT_COMBINED_ENTITIES def extrusion(entity): if entity.extrusion is None: return False return Vector(entity.extrusion) != Vector((0, 0, 1)) \ or (hasattr(entity, "elevation") and entity.elevation != 0)