diff --git a/freecad/bem/boundaries.py b/freecad/bem/boundaries.py
index 8c18f0f..88b7509 100644
--- a/freecad/bem/boundaries.py
+++ b/freecad/bem/boundaries.py
@@ -1,919 +1,921 @@
# coding: utf8
"""This module adapt IfcRelSpaceBoundary and create SIA specific bem boundaries in FreeCAD.
© All rights reserved.
ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE, Switzerland, Laboratory CNPA, 2019-2020
See the LICENSE.TXT file for more details.
Author : Cyril Waechter
"""
import itertools
import os
from collections import namedtuple
import typing
from typing import NamedTuple, Iterable, List, Optional, Dict
import ifcopenshell
import ifcopenshell.geom
import ifcopenshell.util.element
import ifcopenshell.util.unit
import FreeCAD
import FreeCADGui
import Part
from freecad.bem import materials
from freecad.bem.bem_xml import BEMxml
from freecad.bem.bem_logging import logger, LOG_STREAM
from freecad.bem.progress import Progress
from freecad.bem import utils
from freecad.bem.entities import (
RelSpaceBoundary,
BEMBoundary,
Element,
)
from freecad.bem.ifc_importer import IfcImporter, TOLERANCE
if typing.TYPE_CHECKING:
from freecad.bem.typing import (
SpaceFeature,
ContainerFeature,
) # pylint: disable=no-name-in-module, import-error
def processing_sia_boundaries(doc=FreeCAD.ActiveDocument) -> None:
"""Create SIA specific boundaries cf. https://www.sia.ch/fr/services/sia-norm/"""
Progress.set(30, "ProcessingSIABoundaries_Prepare", "")
for space in utils.get_elements_by_ifctype("IfcSpace", doc):
ensure_hosted_element_are(space)
ensure_hosted_are_coplanar(space)
compute_space_area(space)
set_face_to_boundary_info(space)
join_over_splitted_boundaries(space, doc)
handle_curtain_walls(space, doc)
find_closest_edges(space)
set_leso_type(space)
ensure_external_earth_is_set(space, doc)
Progress.set(70, "ProcessingSIABoundaries_Create", "")
create_sia_boundaries(doc)
doc.recompute()
def ensure_external_earth_is_set(space: "SpaceFeature", doc=FreeCAD.ActiveDocument):
sites: List["ContainerFeature"] = list(
utils.get_elements_by_ifctype("IfcSite", doc)
)
ground_bound_box = get_ground_bound_box(sites)
if space.Shape.BoundBox.ZMin - ground_bound_box.ZMax > 1000:
return
ground_shape = Part.Compound([])
for site in sites:
ground_shape.add(site.Shape)
if not ground_shape.BoundBox.isValid():
ground_shape = Part.Plane().toShape()
for boundary in space.SecondLevel.Group:
if boundary.InternalOrExternalBoundary in (
"INTERNAL",
"EXTERNAL_EARTH",
"EXTERNAL_WATER",
"EXTERNAL_FIRE",
):
continue
+ if boundary.InnerBoundaries:
+ continue
if not is_underground(boundary, ground_shape):
continue
boundary.InternalOrExternalBoundary = "EXTERNAL_EARTH"
def is_underground(boundary, ground_shape) -> bool:
closest_points = ground_shape.distToShape(boundary.Shape)[1][0]
direction: FreeCAD.Vector = closest_points[1] - closest_points[0]
if direction.z > 1000:
return False
if boundary.LesoType == "Flooring":
el_thickness = getattr(
getattr(getattr(boundary, "RelatedBuildingElement", 0), "Thickness", 0),
"Value",
0,
)
if direction.z - el_thickness * 1.5 > 0:
return False
boundary.UndergroundDepth = abs(direction.z - el_thickness)
return True
if boundary.LesoType == "Wall":
bbox = boundary.Shape.BoundBox
if (bbox.ZMax + bbox.ZMin) / 2 + direction.z < 0:
return True
if boundary.LesoType == "Ceiling":
if direction.z < TOLERANCE:
return True
return False
def get_ground_bound_box(sites: Iterable["ContainerFeature"]) -> FreeCAD.BoundBox:
boundbox = FreeCAD.BoundBox()
for site in sites:
boundbox.add(site.Shape.BoundBox)
return boundbox if boundbox.isValid() else FreeCAD.BoundBox(0, 0, -30000, 0, 0, 0)
class FaceToBoundary:
def __init__(self, boundary, face):
self.boundary = boundary
self.face = face
self.point_on_face = None
self.point_on_boundary = None
self.compute_shortest()
self.boundary_normal = utils.get_boundary_normal(
boundary, self.point_on_boundary
)
self.face_normal = utils.get_face_normal(face, self.point_on_face)
self.distance = self.vec_to_space.Length
@property
def vec_to_space(self):
return self.point_on_face - self.point_on_boundary
def compute_shortest(self):
boundary_face = self.boundary.Shape.Faces[0]
min_dist = self.face.distToShape(boundary_face)
self.point_on_face = min_dist[1][0][0]
self.point_on_boundary = min_dist[1][0][1]
@property
def is_valid(self):
# Not valid face if its normal and boundary normal do not point in same direction
return abs(self.boundary_normal.dot(self.face_normal)) > 1 - TOLERANCE
@property
def fixed_normal(self):
return (
self.boundary_normal
if self.face_normal.dot(self.boundary_normal) > 0
else -self.boundary_normal
)
@property
def translation_to_face(self):
return self.face_normal * self.face_normal.dot(self.vec_to_space)
def set_face_to_boundary_info(space):
faces = space.Shape.Faces
for boundary in space.SecondLevel.Group:
if boundary.IsHosted:
continue
candidates = (FaceToBoundary(boundary, face) for face in faces)
result = min(candidates, key=lambda x: x.distance if x.is_valid else 10000)
boundary.TranslationToSpace = result.translation_to_face
normal = result.fixed_normal
boundary.Normal = normal
for hosted in boundary.InnerBoundaries:
hosted.Normal = normal
def compute_space_area(space: Part.Feature):
"""Compute both gross and net area"""
z_min = space.Shape.BoundBox.ZMin
z_sre = z_min + 1000 # 1 m above ground. See SIA 380:2015 &3.2.3 p.26-27
sre_plane = Part.Plane(FreeCAD.Vector(0, 0, z_sre), FreeCAD.Vector(0, 0, 1))
space.Area = space.Shape.common(sre_plane.toShape()).Area
# TODO: Not valid yet as it return net area. Find a way to get gross space volume
space.AreaAE = space.Area
def handle_curtain_walls(space, doc) -> None:
"""Add an hosted window with full area in curtain wall boundaries as they are not handled
by BEM softwares"""
for boundary in space.SecondLevel.Group:
if getattr(boundary.RelatedBuildingElement, "IfcType", "") != "IfcCurtainWall":
continue
# Prevent Revit issue which produce curtain wall with an hole inside but no inner boundary
if not boundary.InnerBoundaries:
if len(boundary.Shape.SubShapes) > 2:
outer_wire = boundary.Shape.SubShapes[1]
utils.generate_boundary_compound(boundary, outer_wire, ())
boundary.LesoType = "Wall"
fake_window = doc.copyObject(boundary)
fake_window.IsHosted = True
fake_window.LesoType = "Window"
fake_window.ParentBoundary = boundary
fake_window.GlobalId = ifcopenshell.guid.new()
fake_window.Id = IfcId.new(doc)
RelSpaceBoundary.set_label(fake_window)
space.SecondLevel.addObject(fake_window)
# Host cannot be an empty face so inner wire is scaled down a little
inner_wire = utils.get_outer_wire(boundary).scale(0.999)
inner_wire = utils.project_wire_to_plane(inner_wire, utils.get_plane(boundary))
utils.append_inner_wire(boundary, inner_wire)
utils.append(boundary, "InnerBoundaries", fake_window)
if FreeCAD.GuiUp:
fake_window.ViewObject.ShapeColor = (0.0, 0.7, 1.0)
class IfcId:
"""Generate new id for generated boundaries missing from ifc and keep track of last id used"""
current_id = 0
@classmethod
def new(cls, doc) -> int:
if not cls.current_id:
cls.current_id = max((getattr(obj, "Id", 0) for obj in doc.Objects))
cls.current_id += 1
return cls.current_id
def write_xml(doc=FreeCAD.ActiveDocument) -> BEMxml:
"""Read BEM infos for FreeCAD file and write it to an xml.
xml is stored in an object to allow different outputs"""
bem_xml = BEMxml()
for project in utils.get_elements_by_ifctype("IfcProject", doc):
bem_xml.write_project(project)
for space in utils.get_elements_by_ifctype("IfcSpace", doc):
bem_xml.write_space(space)
for boundary in space.SecondLevel.Group:
bem_xml.write_boundary(boundary)
for building_element in utils.get_by_class(doc, Element):
bem_xml.write_building_elements(building_element)
for material in utils.get_by_class(
doc, (materials.Material, materials.ConstituentSet, materials.LayerSet)
):
bem_xml.write_material(material)
return bem_xml
def output_xml_to_path(bem_xml, xml_path=None):
if not xml_path:
xml_path = (
"./output.xml" if os.name == "nt" else "/home/cyril/git/BIMxBEM/output.xml"
)
bem_xml.write_to_file(xml_path)
def group_by_shared_element(boundaries) -> Dict[str, List["boundary"]]:
elements_dict = dict()
for rel_boundary in boundaries:
try:
key = f"{rel_boundary.RelatedBuildingElement.Id}_{rel_boundary.InternalOrExternalBoundary}"
except AttributeError:
if rel_boundary.PhysicalOrVirtualBoundary == "VIRTUAL":
logger.info("IfcElement %s is VIRTUAL. Modeling error ?")
key = "VIRTUAL"
else:
logger.warning(
"IfcElement %s has no RelatedBuildingElement", rel_boundary.Id
)
corresponding_boundary = rel_boundary.CorrespondingBoundary
if corresponding_boundary:
key += str(corresponding_boundary.Id)
elements_dict.setdefault(key, []).append(rel_boundary)
return elements_dict
def group_coplanar_boundaries(boundary_list) -> List[List["boundary"]]:
coplanar_boundaries = list()
for boundary in boundary_list:
if not coplanar_boundaries:
coplanar_boundaries.append([boundary])
continue
for coplanar_list in coplanar_boundaries:
# TODO: Test if comparison is not too strict considering precision
if utils.is_coplanar(boundary, coplanar_list[0]):
coplanar_list.append(boundary)
break
else:
coplanar_boundaries.append([boundary])
return coplanar_boundaries
def join_over_splitted_boundaries(space, doc=FreeCAD.ActiveDocument):
boundaries = space.SecondLevel.Group
# Considered as the minimal size for an oversplit to occur (1 ceiling, 3 wall, 1 flooring)
if len(boundaries) <= 5:
return
elements_dict = group_by_shared_element(boundaries)
for key, boundary_list in elements_dict.items():
# None coplanar boundaries should not be connected.
# eg. round wall splitted with multiple orientations.
# Case1: No oversplitted boundaries
if len(boundary_list) == 1:
continue
coplanar_groups = group_coplanar_boundaries(boundary_list)
for group in coplanar_groups:
# Case 1 : only 1 boundary related to the same element. Cannot group boundaries.
if len(group) == 1:
continue
# Case 2 : more than 1 boundary related to the same element might be grouped.
try:
join_coplanar_boundaries(group, doc)
except Part.OCCError:
logger.warning(
f"Cannot join boundaries in space <{space.Id}> with key <{key}>"
)
class CommonSegment(NamedTuple):
index1: int
index2: int
opposite_dir: FreeCAD.Vector
def join_coplanar_boundaries(boundaries: list, doc=FreeCAD.ActiveDocument):
"""Try to join coplanar boundaries"""
boundary1 = max(boundaries, key=lambda x: x.Area)
boundaries.remove(boundary1)
remove_from_doc = list()
def find_common_segment(wire1, wire2):
"""Find if wires have common segments and between which edges
return named tuple with edge index from each wire and if they have opposite direction"""
for (ei1, edge1), (ei2, edge2) in itertools.product(
enumerate(wire1.Edges), enumerate(wire2.Edges)
):
if wire1 == wire2 and ei1 == ei2:
continue
common_segment = edges_have_common_segment(edge1, edge2)
if common_segment:
return CommonSegment(ei1, ei2, common_segment.opposite_dir)
def edges_have_common_segment(edge1, edge2):
"""Check if edges have common segments and tell if these segments have same direction"""
p0_1, p0_2 = utils.get_vectors_from_shape(edge1)
p1_1, p1_2 = utils.get_vectors_from_shape(edge2)
v0_12 = p0_2 - p0_1
v1_12 = p1_2 - p1_1
dir0 = (v0_12).normalize()
dir1 = (v1_12).normalize()
# if edge1 and edge2 are not collinear no junction is possible.
if not (
(dir0.isEqual(dir1, TOLERANCE) or dir0.isEqual(-dir1, TOLERANCE))
and v0_12.cross(p1_1 - p0_1).Length < TOLERANCE
):
return
# Check in which order vectors1 and vectors2 should be connected
if dir0.isEqual(dir1, TOLERANCE):
p0_1_next_point, other_point = p1_1, p1_2
opposite_dir = False
else:
p0_1_next_point, other_point = p1_2, p1_1
opposite_dir = True
# Check if edge1 and edge2 have a common segment
if not (
dir0.dot(p0_1_next_point - p0_1) < dir0.dot(p0_2 - p0_1)
and dir0.negative().dot(other_point - p0_2)
< dir0.negative().dot(p0_1 - p0_2)
):
return
return CommonSegment(None, None, opposite_dir)
def join_boundaries(boundary1, boundary2):
wire1 = utils.get_outer_wire(boundary1)
vectors1 = utils.get_vectors_from_shape(wire1)
wire2 = utils.get_outer_wire(boundary2)
vectors2 = utils.get_vectors_from_shape(wire2)
common_segment = find_common_segment(wire1, wire2)
if not common_segment:
return False
ei1, ei2, opposite_dir = common_segment
# join vectors1 and vectors2 at indexes
new_points = vectors2[ei2 + 1 :] + vectors2[: ei2 + 1]
if not opposite_dir:
new_points.reverse()
# Efficient way to insert elements at index : https://stackoverflow.com/questions/14895599/insert-an-element-at-specific-index-in-a-list-and-return-updated-list/48139870#48139870 pylint: disable=line-too-long
vectors1[ei1 + 1 : ei1 + 1] = new_points
inner_wires = utils.get_inner_wires(boundary1)[:]
inner_wires.extend(utils.get_inner_wires(boundary2))
if not boundary1.IsHosted:
for inner_boundary in boundary2.InnerBoundaries:
utils.append(boundary1, "InnerBoundaries", inner_boundary)
inner_boundary.ParentBoundary = boundary1
# Update shape
utils.clean_vectors(vectors1)
utils.close_vectors(vectors1)
wire1 = Part.makePolygon(vectors1)
utils.generate_boundary_compound(boundary1, wire1, inner_wires)
RelSpaceBoundary.recompute_areas(boundary1)
return True
while True and boundaries:
for boundary2 in boundaries:
if join_boundaries(boundary1, boundary2):
boundaries.remove(boundary2)
remove_from_doc.append(boundary2)
break
else:
logger.warning(
f"""Unable to join boundaries RelSpaceBoundary Id <{boundary1.Id}>
with boundaries <{", ".join(str(b.Id) for b in boundaries)}>"""
)
break
wire1 = utils.get_outer_wire(boundary1)
vectors1 = utils.get_vectors_from_shape(wire1)
inner_wires = utils.get_inner_wires(boundary1)[:]
while True:
common_segment = find_common_segment(wire1, wire1)
if not common_segment:
break
ei1, ei2 = common_segment[0:2]
# join vectors1 and vectors2 at indexes
vectors_split1 = vectors1[: ei1 + 1] + vectors1[ei2 + 1 :]
vectors_split2 = vectors1[ei1 + 1 : ei2 + 1]
utils.clean_vectors(vectors_split1)
utils.clean_vectors(vectors_split2)
area1 = Part.Face(Part.makePolygon(vectors_split1 + [vectors_split1[0]])).Area
area2 = Part.Face(Part.makePolygon(vectors_split2 + [vectors_split2[0]])).Area
if area1 > area2:
vectors1 = vectors_split1
inner_vectors = vectors_split2
else:
vectors1 = vectors_split2
inner_vectors = vectors_split1
utils.close_vectors(inner_vectors)
inner_polygon = Part.makePolygon(inner_vectors)
if Part.Face(inner_polygon).Area > TOLERANCE:
inner_wires.extend([inner_polygon])
# Update shape
utils.close_vectors(vectors1)
wire1 = Part.makePolygon(vectors1)
utils.generate_boundary_compound(boundary1, wire1, inner_wires)
RelSpaceBoundary.recompute_areas(boundary1)
# Clean FreeCAD document if join operation was a success
for fc_object in remove_from_doc:
doc.removeObject(fc_object.Name)
def ensure_hosted_element_are(space):
for boundary in space.SecondLevel.Group:
try:
ifc_type = boundary.RelatedBuildingElement.IfcType
except AttributeError:
continue
if not is_typically_hosted(ifc_type):
continue
if boundary.IsHosted and boundary.ParentBoundary:
continue
def are_too_far(boundary1, boundary2):
max_distance = getattr(
getattr(boundary2.RelatedBuildingElement, "Thickness", 0), "Value", 0
)
return (
boundary1.Shape.distToShape(boundary2.Shape)[0] - max_distance
> TOLERANCE
)
def find_host(boundary):
fallback_solution = None
for boundary2 in space.SecondLevel.Group:
if boundary is boundary2:
continue
if not utils.are_parallel_boundaries(boundary, boundary2):
continue
if are_too_far(boundary, boundary2):
continue
fallback_solution = boundary2
for inner_wire in utils.get_inner_wires(boundary2):
if (
not abs(Part.Face(inner_wire).Area - boundary.Area.Value)
< TOLERANCE
):
continue
return boundary2
if not fallback_solution:
raise HostNotFound(
f"No host found for RelSpaceBoundary Id<{boundary.Id}>"
)
logger.warning(
f"Using fallback solution to resolve host of RelSpaceBoundary Id<{boundary.Id}>"
)
return fallback_solution
try:
host = find_host(boundary)
except HostNotFound as err:
logger.exception(err)
boundary.IsHosted = True
boundary.ParentBoundary = host
utils.append(host, "InnerBoundaries", boundary)
def ensure_hosted_are_coplanar(space):
for boundary in space.SecondLevel.Group:
for inner_boundary in boundary.InnerBoundaries:
if utils.is_coplanar(inner_boundary, boundary):
continue
utils.project_boundary_onto_plane(inner_boundary, utils.get_plane(boundary))
outer_wire = utils.get_outer_wire(boundary)
inner_wires = utils.get_inner_wires(boundary)
inner_wire = utils.get_outer_wire(inner_boundary)
inner_wires.append(inner_wire)
try:
face = boundary.Shape.Faces[0]
face = face.cut(Part.Face(inner_wire))
except RuntimeError:
pass
boundary.Shape = Part.Compound([face, outer_wire, *inner_wires])
def is_typically_hosted(ifc_type: str):
"""Say if given ifc_type is typically hosted eg. windows, doors"""
usually_hosted_types = ("IfcWindow", "IfcDoor", "IfcOpeningElement")
for usual_type in usually_hosted_types:
if ifc_type.startswith(usual_type):
return True
return False
class HostNotFound(LookupError):
pass
Closest = namedtuple("Closest", ["boundary", "edge", "distance"])
def init_closest_default_values(boundaries):
for boundary in boundaries:
n_edges = len(utils.get_outer_wire(boundary).Edges)
boundary.Proxy.closest = [
Closest(boundary=None, edge=-1, distance=100000)
] * n_edges
def compare_closest_edges(boundary1, ei1, edge1, boundary2, ei2, edge2):
distance = boundary1.Proxy.closest[ei1].distance
edge_to_edge = edge_distance_to_edge(edge1, edge2)
if distance <= TOLERANCE:
return
elif edge_to_edge <= TOLERANCE or edge_to_edge - distance - TOLERANCE <= 0:
boundary1.Proxy.closest[ei1] = Closest(boundary2, ei2, edge_to_edge)
def find_closest_by_distance(boundary1, boundary2):
edges1 = utils.get_outer_wire(boundary1).Edges
edges2 = utils.get_outer_wire(boundary2).Edges
for (ei1, edge1), (ei2, edge2) in itertools.product(
enumerate(edges1), enumerate(edges2)
):
if not is_low_angle(edge1, edge2):
continue
compare_closest_edges(boundary1, ei1, edge1, boundary2, ei2, edge2)
compare_closest_edges(
boundary2, ei2, edge2, boundary1, ei1, edge1
) # pylint: disable=arguments-out-of-order
def find_closest_by_intersection(boundary1, boundary2):
intersect_line = utils.get_plane(boundary1).intersectSS(utils.get_plane(boundary2))[
0
]
boundaries_distance = boundary1.Shape.distToShape(boundary2.Shape)[0]
edges1 = utils.get_outer_wire(boundary1).Edges
edges2 = utils.get_outer_wire(boundary2).Edges
for (ei1, edge1), (ei2, edge2) in itertools.product(
enumerate(edges1), enumerate(edges2)
):
distance1 = edge_distance_to_line(edge1, intersect_line) + boundaries_distance
distance2 = edge_distance_to_line(edge2, intersect_line) + boundaries_distance
min_distance = boundary1.Proxy.closest[ei1].distance
if distance1 < min_distance:
boundary1.Proxy.closest[ei1] = Closest(boundary2, -1, distance1)
min_distance = boundary2.Proxy.closest[ei2].distance
if distance2 < min_distance:
boundary2.Proxy.closest[ei2] = Closest(boundary1, -1, distance2)
def find_closest_edges(space: "SpaceFeature") -> None:
"""Find closest boundary and edge to be able to reconstruct a closed shell"""
boundaries = [b for b in space.SecondLevel.Group if not b.IsHosted]
init_closest_default_values(boundaries)
# Loop through all boundaries and edges to find the closest edge
for boundary1, boundary2 in itertools.combinations(boundaries, 2):
# If boundary1 and boundary2 have opposite direction no match possible
normals_dot = boundary2.Normal.dot(boundary1.Normal)
if normals_dot <= -1 + TOLERANCE:
continue
# If boundaries are not almost parallel, they must intersect
if not normals_dot >= 1 - TOLERANCE:
find_closest_by_intersection(boundary1, boundary2)
# If they are parallel all edges need to be compared
else:
find_closest_by_distance(boundary1, boundary2)
# Store found values in standard FreeCAD properties
for boundary in boundaries:
closest_boundaries, boundary.ClosestEdges, closest_distances = (
list(i) for i in zip(*boundary.Proxy.closest)
)
boundary.ClosestBoundaries = [b.Id if b else -1 for b in closest_boundaries]
boundary.ClosestDistance = [int(d) for d in closest_distances]
def set_leso_type(space):
for boundary in space.SecondLevel.Group:
# LesoType is defined in previous steps for curtain walls
if boundary.LesoType != "Unknown":
continue
boundary.LesoType = define_leso_type(boundary)
def define_leso_type(boundary):
try:
ifc_type = boundary.RelatedBuildingElement.IfcType
except AttributeError:
if boundary.PhysicalOrVirtualBoundary != "VIRTUAL":
logger.warning(f"Unable to define LesoType for boundary <{boundary.Id}>")
return "Unknown"
if ifc_type.startswith("IfcWindow"):
return "Window"
elif ifc_type.startswith("IfcDoor"):
return "Door"
elif ifc_type.startswith("IfcWall"):
return "Wall"
elif ifc_type.startswith("IfcSlab") or ifc_type == "IfcRoof":
# Pointing up => Ceiling. Pointing down => Flooring
if boundary.Normal.z > 0:
return "Ceiling"
return "Flooring"
elif ifc_type.startswith("IfcOpeningElement"):
return "Opening"
else:
logger.warning(f"Unable to define LesoType for Boundary Id <{boundary.Id}>")
return "Unknown"
def edge_distance_to_edge(edge1: Part.Edge, edge2: Part.Edge) -> float:
mid_point = edge1.CenterOfMass
line_segment = (v.Point for v in edge2.Vertexes)
return mid_point.distanceToLineSegment(*line_segment).Length
def edge_distance_to_line(edge, line):
mid_point = edge.CenterOfMass
return mid_point.distanceToLine(line.Location, line.Direction)
def is_low_angle(edge1, edge2):
dir1 = (edge1.Vertexes[1].Point - edge1.Vertexes[0].Point).normalize()
dir2 = (edge2.Vertexes[1].Point - edge2.Vertexes[0].Point).normalize()
return (
abs(dir1.dot(dir2)) > 0.866
) # Low angle considered as < 30°. cos(pi/6)=0.866.
def create_sia_boundaries(doc=FreeCAD.ActiveDocument):
"""Create boundaries necessary for SIA calculations"""
for space in utils.get_elements_by_ifctype("IfcSpace", doc):
create_sia_ext_boundaries(space)
create_sia_int_boundaries(space)
rejoin_boundaries(space, "SIA_Exterior")
rejoin_boundaries(space, "SIA_Interior")
def get_intersecting_line(boundary1, boundary2) -> Optional[Part.Line]:
plane_intersect = utils.get_plane(boundary1).intersectSS(utils.get_plane(boundary2))
return plane_intersect[0] if plane_intersect else None
def get_medial_axis(boundary1, boundary2, ei1, ei2) -> Optional[Part.Line]:
line1 = utils.line_from_edge(utils.get_outer_wire(boundary1).Edges[ei1])
try:
line2 = utils.line_from_edge(utils.get_outer_wire(boundary2).Edges[ei2])
except IndexError:
logger.warning(
f"""Cannot find closest edge index <{ei2}> in boundary <{boundary2.Label}>
to rejoin boundary <{boundary1.Label}>"""
)
return None
# Case 2a : edges are not parallel
if abs(line1.Direction.dot(line2.Direction)) < 1 - TOLERANCE:
b1_plane = utils.get_plane(boundary1)
line_intersect = line1.intersect2d(line2, b1_plane)
if line_intersect:
point1 = b1_plane.value(*line_intersect[0])
if line1.Direction.dot(line2.Direction) > 0:
point2 = point1 + line1.Direction + line2.Direction
else:
point2 = point1 + line1.Direction - line2.Direction
# Case 2b : edges are parallel
else:
point1 = (line1.Location + line2.Location) * 0.5
point2 = point1 + line1.Direction
try:
return Part.Line(point1, point2)
except Part.OCCError:
logger.exception(
f"Failure in boundary id <{boundary1.SourceBoundary.Id}> {point1} and {point2} are equal"
)
return None
def is_valid_join(line, fallback_line):
"""Angle < 15 ° is considered as valid join. cos(pi/6 ≈ 0.96)"""
return abs(line.Direction.dot(fallback_line.Direction)) > 0.96
def rejoin_boundaries(space, sia_type):
"""
Rejoin boundaries after their translation to get a correct close shell surfaces.
1 Fill gaps between boundaries (2b)
2 Fill gaps gerenate by translation to make a boundary on the inside or outside boundary of
building elements
https://standards.buildingsmart.org/IFC/RELEASE/IFC4/ADD2_TC1/HTML/schema/ifcproductextension/lexical/ifcrelspaceboundary2ndlevel.htm # pylint: disable=line-too-long
"""
base_boundaries = space.SecondLevel.Group
for base_boundary in base_boundaries:
lines = []
fallback_lines = [
utils.line_from_edge(edge)
for edge in utils.get_outer_wire(base_boundary).Edges
]
boundary1 = getattr(base_boundary, sia_type)
if (
base_boundary.IsHosted
or base_boundary.PhysicalOrVirtualBoundary == "VIRTUAL"
or not base_boundary.RelatedBuildingElement
):
continue
b1_plane = utils.get_plane(boundary1)
for b2_id, (ei1, ei2), fallback_line in zip(
base_boundary.ClosestBoundaries,
enumerate(base_boundary.ClosestEdges),
fallback_lines,
):
base_boundary2 = utils.get_in_list_by_id(base_boundaries, b2_id)
boundary2 = getattr(base_boundary2, sia_type, None)
if not boundary2:
logger.warning(f"Cannot find corresponding boundary with id <{b2_id}>")
lines.append(
utils.line_from_edge(utils.get_outer_wire(base_boundary).Edges[ei1])
)
continue
# Case 1 : boundaries are not parallel
line = get_intersecting_line(boundary1, boundary2)
if line:
if not is_valid_join(line, fallback_line):
line = fallback_line
lines.append(line)
continue
# Case 2 : boundaries are parallel
line = get_medial_axis(boundary1, boundary2, ei1, ei2)
if line and is_valid_join(line, fallback_line):
lines.append(line)
continue
lines.append(fallback_line)
# Generate new shape
try:
outer_wire = utils.polygon_from_lines(lines, b1_plane)
except Part.OCCError:
logger.exception(
f"Invalid geometry while rejoining boundary Id <{base_boundary.Id}>"
)
continue
try:
Part.Face(outer_wire)
except Part.OCCError:
logger.exception(f"Unable to rejoin boundary Id <{base_boundary.Id}>")
continue
inner_wires = utils.get_inner_wires(boundary1)
try:
utils.generate_boundary_compound(boundary1, outer_wire, inner_wires)
except RuntimeError as err:
logger.exception(err)
continue
boundary1.Area = area = boundary1.Shape.Area
for inner_boundary in base_boundary.InnerBoundaries:
area = area + inner_boundary.Shape.Area
boundary1.AreaWithHosted = area
def create_sia_ext_boundaries(space):
"""Create SIA boundaries from RelSpaceBoundaries and translate it if necessary"""
sia_group_obj = space.Boundaries.newObject(
"App::DocumentObjectGroup", "SIA_Exteriors"
)
space.SIA_Exteriors = sia_group_obj
for boundary1 in space.SecondLevel.Group:
if boundary1.IsHosted or boundary1.PhysicalOrVirtualBoundary == "VIRTUAL":
continue
bem_boundary = BEMBoundary.create(boundary1, "SIA_Exterior")
sia_group_obj.addObject(bem_boundary)
if not boundary1.RelatedBuildingElement:
continue
thickness = boundary1.RelatedBuildingElement.Thickness.Value
leso_type = boundary1.LesoType
normal = boundary1.Normal
# EXTERNAL: there is multiple possible values for external so testing internal is better.
if boundary1.InternalOrExternalBoundary != "INTERNAL":
distance = thickness
# INTERNAL
else:
if leso_type == "Flooring":
distance = 0
elif leso_type == "Ceiling":
distance = thickness
else: # Walls
distance = thickness / 2
bem_boundary.Placement.move(normal * distance + boundary1.TranslationToSpace)
def create_sia_int_boundaries(space):
"""Create boundaries necessary for SIA calculations"""
sia_group_obj = space.Boundaries.newObject(
"App::DocumentObjectGroup", "SIA_Interiors"
)
space.SIA_Interiors = sia_group_obj
for boundary in space.SecondLevel.Group:
if boundary.IsHosted or boundary.PhysicalOrVirtualBoundary == "VIRTUAL":
continue
bem_boundary = BEMBoundary.create(boundary, "SIA_Interior")
sia_group_obj.addObject(bem_boundary)
# Bad location in some software like Revit (last check : revit-ifc 21.1.0.0)
if not boundary.TranslationToSpace.isEqual(FreeCAD.Vector(), TOLERANCE):
bem_boundary.Placement.move(boundary.TranslationToSpace)
class XmlResult(NamedTuple):
xml: str
log: str
def generate_bem_xml_from_file(ifc_path: str) -> XmlResult:
try:
import pyCaller
Progress.progress_func = pyCaller.SetProgress
except ImportError:
pass
Progress.set(0, "IfcImport_OpenIfcFile", "")
ifc_importer = IfcImporter(ifc_path)
ifc_importer.generate_rel_space_boundaries()
doc = ifc_importer.doc
processing_sia_boundaries(doc)
Progress.set(90, "Communicate_Write", "")
xml_str = write_xml(doc).tostring()
log_str = LOG_STREAM.getvalue()
Progress.set(100, "Communicate_Send", "")
return XmlResult(xml_str, log_str)
def process_test_file(ifc_path, doc):
ifc_importer = IfcImporter(ifc_path, doc)
ifc_importer.generate_rel_space_boundaries()
processing_sia_boundaries(doc)
bem_xml = write_xml(doc)
output_xml_to_path(bem_xml)
ifc_importer.xml = bem_xml
ifc_importer.log = LOG_STREAM.getvalue()
if FreeCAD.GuiUp:
FreeCADGui.activeView().viewIsometric()
FreeCADGui.SendMsgToActiveView("ViewFit")
with open("./boundaries.log", "w", encoding="utf-8") as log_file:
log_file.write(ifc_importer.log)
return ifc_importer