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operator.py
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operator.py
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# BlenderBIM Add-on - OpenBIM Blender Add-on
# Copyright (C) 2020, 2021 Dion Moult <dion@thinkmoult.com>
#
# This file is part of BlenderBIM Add-on.
#
# BlenderBIM Add-on 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 3 of the License, or
# (at your option) any later version.
#
# BlenderBIM Add-on 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 BlenderBIM Add-on. If not, see <http://www.gnu.org/licenses/>.
import os
import re
import bpy
import json
import time
import bmesh
import shutil
import hashlib
import shapely
import subprocess
import numpy as np
import multiprocessing
import ifcopenshell
import ifcopenshell.geom
import ifcopenshell.util.selector
import ifcopenshell.util.representation
import ifcopenshell.util.element
import blenderbim.bim.schema
import blenderbim.tool as tool
import blenderbim.core.drawing as core
import blenderbim.bim.module.drawing.svgwriter as svgwriter
import blenderbim.bim.module.drawing.annotation as annotation
import blenderbim.bim.module.drawing.sheeter as sheeter
import blenderbim.bim.module.drawing.scheduler as scheduler
import blenderbim.bim.module.drawing.helper as helper
import blenderbim.bim.export_ifc
from blenderbim.bim.module.drawing.decoration import CutDecorator
from blenderbim.bim.module.drawing.data import DecoratorData, DrawingsData
from typing import NamedTuple, List, Union, Optional
from lxml import etree
from mathutils import Vector, Color, Matrix
from timeit import default_timer as timer
from blenderbim.bim.module.drawing.prop import RasterStyleProperty, Literal, RASTER_STYLE_PROPERTIES_EXCLUDE
from blenderbim.bim.ifc import IfcStore
from pathlib import Path
from bpy_extras.image_utils import load_image
cwd = os.path.dirname(os.path.realpath(__file__))
class profile:
"""
A python context manager timing utility
"""
def __init__(self, task):
self.task = task
def __enter__(self):
self.start = timer()
def __exit__(self, *args):
print(self.task, timer() - self.start)
class Operator:
def execute(self, context):
IfcStore.execute_ifc_operator(self, context)
blenderbim.bim.handler.refresh_ui_data()
return {"FINISHED"}
class LineworkContexts(NamedTuple):
body: List[List[int]]
annotation: List[List[int]]
class AddAnnotationType(bpy.types.Operator, Operator):
bl_idname = "bim.add_annotation_type"
bl_label = "Add Annotation Type"
bl_options = {"REGISTER", "UNDO"}
def _execute(self, context):
props = context.scene.BIMAnnotationProperties
object_type = props.object_type
has_representation = props.create_representation_for_type
drawing = tool.Ifc.get_entity(bpy.context.scene.camera)
if props.create_representation_for_type:
obj = tool.Drawing.create_annotation_object(drawing, object_type)
else:
obj = bpy.data.objects.new(object_type, None)
obj.name = props.type_name
element = tool.Drawing.run_root_assign_class(
obj=obj,
ifc_class="IfcTypeProduct",
predefined_type=object_type,
should_add_representation=has_representation,
context=ifcopenshell.util.representation.get_context(tool.Ifc.get(), "Model", "Annotation", "MODEL_VIEW"),
ifc_representation_class=tool.Drawing.get_ifc_representation_class(object_type),
)
element.ApplicableOccurrence = f"IfcAnnotation/{object_type}"
if props.create_representation_for_type and object_type == "IMAGE":
bpy.ops.bim.add_reference_image("INVOKE_DEFAULT", use_existing_object_by_name=obj.name)
class EnableAddAnnotationType(bpy.types.Operator, Operator):
bl_idname = "bim.enable_add_annotation_type"
bl_label = "Enable Add Annotation Type"
bl_options = {"REGISTER", "UNDO"}
def _execute(self, context):
bpy.context.scene.BIMAnnotationProperties.is_adding_type = True
class DisableAddAnnotationType(bpy.types.Operator, Operator):
bl_idname = "bim.disable_add_annotation_type"
bl_label = "Disable Add Annotation Type"
bl_options = {"REGISTER", "UNDO"}
def _execute(self, context):
bpy.context.scene.BIMAnnotationProperties.is_adding_type = False
class AddDrawing(bpy.types.Operator, Operator):
bl_idname = "bim.add_drawing"
bl_label = "Add Drawing"
bl_options = {"REGISTER", "UNDO"}
def _execute(self, context):
self.props = context.scene.DocProperties
hint = self.props.location_hint
if self.props.target_view in ["PLAN_VIEW", "REFLECTED_PLAN_VIEW"]:
hint = int(hint)
core.add_drawing(
tool.Ifc,
tool.Collector,
tool.Drawing,
target_view=self.props.target_view,
location_hint=hint,
)
try:
drawing = tool.Ifc.get().by_id(self.props.active_drawing_id)
core.sync_references(tool.Ifc, tool.Collector, tool.Drawing, drawing=drawing)
except:
pass
class DuplicateDrawing(bpy.types.Operator, Operator):
bl_idname = "bim.duplicate_drawing"
bl_label = "Duplicate Drawing"
bl_options = {"REGISTER", "UNDO"}
drawing: bpy.props.IntProperty()
should_duplicate_annotations: bpy.props.BoolProperty(name="Should Duplicate Annotations", default=False)
def invoke(self, context, event):
return context.window_manager.invoke_props_dialog(self)
def draw(self, context):
row = self.layout
row.prop(self, "should_duplicate_annotations")
def _execute(self, context):
self.props = context.scene.DocProperties
core.duplicate_drawing(
tool.Ifc,
tool.Drawing,
drawing=tool.Ifc.get().by_id(self.drawing),
should_duplicate_annotations=self.should_duplicate_annotations,
)
try:
drawing = tool.Ifc.get().by_id(self.props.active_drawing_id)
core.sync_references(tool.Ifc, tool.Collector, tool.Drawing, drawing=drawing)
except:
pass
class CreateDrawing(bpy.types.Operator):
"""Creates/refreshes a .svg drawing
Only available if :
- IFC file is created
- Camera is in Orthographic mode"""
bl_idname = "bim.create_drawing"
bl_label = "Create Drawing"
bl_description = (
"Creates/refreshes a .svg drawing based on currently active camera.\n\n"
+ "SHIFT+CLICK to print all selected drawings"
)
print_all: bpy.props.BoolProperty(name="Print All", default=False, options={"SKIP_SAVE"})
sync: bpy.props.BoolProperty(
name="Sync Before Creating Drawing",
description="Could save some time if you're sure IFC and current Blender session are already in sync",
default=True,
)
@classmethod
def poll(cls, context):
return bool(tool.Ifc.get() and tool.Drawing.is_drawing_active())
def invoke(self, context, event):
# printing all drawings on shift+click
# make sure to use SKIP_SAVE on property, otherwise it might get stuck
if event.type == "LEFTMOUSE" and event.shift:
self.print_all = True
return self.execute(context)
def execute(self, context):
self.props = context.scene.DocProperties
if self.print_all:
original_drawing_id = self.props.active_drawing_id
drawings_to_print = [d.ifc_definition_id for d in self.props.drawings if d.is_selected and d.is_drawing]
else:
drawings_to_print = [self.props.active_drawing_id]
for drawing_i, drawing_id in enumerate(drawings_to_print):
self.drawing_index = drawing_i
if self.print_all:
bpy.ops.bim.activate_drawing(drawing=drawing_id, camera_view_point=False)
self.camera = context.scene.camera
self.camera_element = tool.Ifc.get_entity(self.camera)
self.camera_document = tool.Drawing.get_drawing_document(self.camera_element)
self.file = IfcStore.get_file()
with profile("Drawing generation process"):
with profile("Initialize drawing generation process"):
self.cprops = self.camera.data.BIMCameraProperties
self.drawing = self.file.by_id(drawing_id)
self.drawing_name = self.drawing.Name
self.metadata = tool.Drawing.get_drawing_metadata(self.camera_element)
self.get_scale(context)
if self.cprops.update_representation(self.camera):
bpy.ops.bim.update_representation(obj=self.camera.name, ifc_representation_class="")
self.svg_writer = svgwriter.SvgWriter()
self.svg_writer.human_scale = self.human_scale
self.svg_writer.scale = self.scale
self.svg_writer.data_dir = context.scene.BIMProperties.data_dir
self.svg_writer.camera = self.camera
self.svg_writer.camera_width, self.svg_writer.camera_height = self.get_camera_dimensions()
self.svg_writer.camera_projection = tuple(
self.camera.matrix_world.to_quaternion() @ Vector((0, 0, -1))
)
self.svg_writer.setup_drawing_resource_paths(self.camera_element)
underlay_svg = None
linework_svg = None
annotation_svg = None
with profile("Generate underlay"):
underlay_svg = self.generate_underlay(context)
with profile("Generate linework"):
if tool.Drawing.is_camera_orthographic():
linework_svg = self.generate_linework(context)
with profile("Generate annotation"):
if tool.Drawing.is_camera_orthographic():
annotation_svg = self.generate_annotation(context)
with profile("Combine SVG layers"):
svg_path = self.combine_svgs(context, underlay_svg, linework_svg, annotation_svg)
tool.Drawing.open_with_user_command(
context.preferences.addons["blenderbim"].preferences.svg_command, svg_path
)
if self.print_all:
bpy.ops.bim.activate_drawing(drawing=original_drawing_id, camera_view_point=False)
return {"FINISHED"}
def get_camera_dimensions(self):
render = bpy.context.scene.render
if self.is_landscape(render):
width = self.camera.data.ortho_scale
height = width / render.resolution_x * render.resolution_y
else:
height = self.camera.data.ortho_scale
width = height / render.resolution_y * render.resolution_x
return width, height
def combine_svgs(self, context, underlay, linework, annotation):
# Hacky :)
svg_path = self.get_svg_path()
with open(svg_path, "w") as outfile:
self.svg_writer.create_blank_svg(svg_path).define_boilerplate()
boilerplate = self.svg_writer.svg.tostring()
outfile.write(boilerplate.replace("</svg>", ""))
if underlay:
with open(underlay) as infile:
for i, line in enumerate(infile):
if i < 2:
continue
elif "</svg>" in line:
continue
outfile.write(line)
shutil.copyfile(os.path.splitext(underlay)[0] + ".png", os.path.splitext(svg_path)[0] + "-underlay.png")
if linework:
with open(linework) as infile:
should_skip = False
for i, line in enumerate(infile):
if i == 0:
continue
if "</svg>" in line:
continue
elif "<defs>" in line:
should_skip = True
continue
elif "</defs>" in line:
should_skip = False
continue
elif should_skip:
continue
outfile.write(line)
if annotation:
with open(annotation) as infile:
for i, line in enumerate(infile):
if i < 2:
continue
if "</svg>" in line:
continue
outfile.write(line)
outfile.write("</svg>")
return svg_path
def generate_underlay(self, context):
if not ifcopenshell.util.element.get_pset(self.drawing, "EPset_Drawing", "HasUnderlay"):
return
svg_path = self.get_svg_path(cache_type="underlay")
if os.path.isfile(svg_path) and self.props.should_use_underlay_cache:
return svg_path
visible_object_names = {obj.name for obj in bpy.context.visible_objects}
for obj in bpy.context.view_layer.objects:
obj.hide_render = obj.name not in visible_object_names
context.scene.render.filepath = svg_path[0:-4] + ".png"
drawing_style = context.scene.DocProperties.drawing_styles[self.cprops.active_drawing_style_index]
if drawing_style.render_type == "DEFAULT":
bpy.ops.render.render(write_still=True)
else:
previous_visibility = {}
for obj in self.camera.BIMObjectProperties.collection.objects:
if bpy.context.view_layer.objects.get(obj.name):
previous_visibility[obj.name] = obj.hide_get()
obj.hide_set(True)
for obj in context.visible_objects:
if (
(not obj.data and not obj.instance_collection)
or isinstance(obj.data, bpy.types.Camera)
or "IfcGrid/" in obj.name
or "IfcGridAxis/" in obj.name
or "IfcOpeningElement/" in obj.name
):
if bpy.context.view_layer.objects.get(obj.name):
previous_visibility[obj.name] = obj.hide_get()
obj.hide_set(True)
space = self.get_view_3d(context.screen.areas)
previous_shading = space.shading.type
previous_format = context.scene.render.image_settings.file_format
space.shading.type = "RENDERED"
context.scene.render.image_settings.file_format = "PNG"
bpy.ops.render.opengl(write_still=True)
space.shading.type = previous_shading
context.scene.render.image_settings.file_format = previous_format
for name, value in previous_visibility.items():
bpy.data.objects[name].hide_set(value)
self.svg_writer.create_blank_svg(svg_path).draw_underlay(context.scene.render.filepath).save()
return svg_path
def get_linework_contexts(self, ifc, target_view) -> LineworkContexts:
plan_body_target_contexts = []
plan_body_model_contexts = []
model_body_target_contexts = []
model_body_model_contexts = []
plan_annotation_target_contexts = []
plan_annotation_model_contexts = []
model_annotation_target_contexts = []
model_annotation_model_contexts = []
for rep_context in ifc.by_type("IfcGeometricRepresentationContext"):
if rep_context.is_a("IfcGeometricRepresentationSubContext"):
if rep_context.ContextType == "Plan":
if rep_context.ContextIdentifier in ["Body", "Facetation"]:
if rep_context.TargetView == target_view:
plan_body_target_contexts.append(rep_context.id())
elif rep_context.TargetView == "MODEL_VIEW":
plan_body_model_contexts.append(rep_context.id())
elif rep_context.ContextIdentifier == "Annotation":
if rep_context.TargetView == target_view:
plan_annotation_target_contexts.append(rep_context.id())
elif rep_context.TargetView == "MODEL_VIEW":
plan_annotation_model_contexts.append(rep_context.id())
elif rep_context.ContextType == "Model":
if rep_context.ContextIdentifier in ["Body", "Facetation"]:
if rep_context.TargetView == target_view:
model_body_target_contexts.append(rep_context.id())
elif rep_context.TargetView == "MODEL_VIEW":
model_body_model_contexts.append(rep_context.id())
elif rep_context.ContextIdentifier == "Annotation":
if rep_context.TargetView == target_view:
model_annotation_target_contexts.append(rep_context.id())
elif rep_context.TargetView == "MODEL_VIEW":
model_annotation_model_contexts.append(rep_context.id())
elif rep_context.ContextType == "Model":
# You should never purely assign to a "Model" context, but
# if you do, this is what we assume your intention is.
model_body_model_contexts.append(rep_context.id())
continue
body_contexts = (
[
plan_body_target_contexts,
plan_body_model_contexts,
model_body_target_contexts,
model_body_model_contexts,
]
if target_view in ["PLAN_VIEW", "REFLECTED_PLAN_VIEW"]
else [
model_body_target_contexts,
model_body_model_contexts,
]
)
annotation_contexts = (
[
plan_annotation_target_contexts,
plan_annotation_model_contexts,
model_annotation_target_contexts,
model_annotation_model_contexts,
]
if target_view in ["PLAN_VIEW", "REFLECTED_PLAN_VIEW"]
else [
model_annotation_target_contexts,
model_annotation_model_contexts,
]
)
return LineworkContexts(body_contexts, annotation_contexts)
def serialize_contexts_elements(
self,
ifc: ifcopenshell.file,
tree: ifcopenshell.geom.tree,
contexts: LineworkContexts,
context_type: str,
drawing_elements: set[ifcopenshell.entity_instance],
target_view: str,
) -> None:
drawing_elements = drawing_elements.copy()
contexts = getattr(contexts, context_type)
for context in contexts:
with profile(f"Processing {context_type} context"):
if not context or not drawing_elements:
continue
geom_settings = ifcopenshell.geom.settings(
DISABLE_TRIANGULATION=True, STRICT_TOLERANCE=True, INCLUDE_CURVES=True
)
if ifc.by_id(context[0]).ContextType == "Plan" and "PLAN_VIEW" in target_view:
offset = ifcopenshell.ifcopenshell_wrapper.float_array_3()
# A 2mm Z offset to combat Z-fighting in plan or RCPs
offset[2] = 0.002 if target_view == "PLAN_VIEW" else -0.002
geom_settings.offset = offset
geom_settings.set_context_ids(context)
it = ifcopenshell.geom.iterator(
geom_settings, ifc, multiprocessing.cpu_count(), include=drawing_elements
)
processed = set()
for elem in it:
processed.add(ifc.by_id(elem.id))
self.serialiser.write(elem)
tree.add_element(elem)
drawing_elements -= processed
def generate_linework(self, context: bpy.types.Context) -> Union[str, None]:
if not ifcopenshell.util.element.get_pset(self.drawing, "EPset_Drawing", "HasLinework"):
return
svg_path = self.get_svg_path(cache_type="linework")
if os.path.isfile(svg_path) and self.props.should_use_linework_cache:
return svg_path
# in case of printing multiple drawings we need to sync just once
if self.sync and self.drawing_index == 0:
with profile("sync"):
# All very hackish whilst prototyping
exporter = blenderbim.bim.export_ifc.IfcExporter(None)
exporter.file = tool.Ifc.get()
invalidated_elements = exporter.sync_all_objects(skip_unlinking=True)
invalidated_elements += exporter.sync_edited_objects()
invalidated_guids = [e.GlobalId for e in invalidated_elements if hasattr(e, "GlobalId")]
cache = IfcStore.get_cache()
[cache.remove(guid) for guid in invalidated_guids]
# If we have already calculated it in the SVG in the past, don't recalculate
edited_guids = set()
for obj in IfcStore.edited_objs:
element = tool.Ifc.get_entity(obj)
edited_guids.add(element.GlobalId) if hasattr(element, "GlobalId") else None
cached_linework = set()
if os.path.isfile(svg_path):
tree = etree.parse(svg_path)
root = tree.getroot()
cached_linework = {
el.get("{http://www.ifcopenshell.org/ns}guid")
for el in root.findall(".//{http://www.w3.org/2000/svg}g[@{http://www.ifcopenshell.org/ns}guid]")
}
cached_linework -= edited_guids
files = {context.scene.BIMProperties.ifc_file: tool.Ifc.get()}
for ifc_path, ifc in files.items():
# Don't use draw.main() just whilst we're prototyping and experimenting
# TODO: hash paths are never used
ifc_hash = hashlib.md5(ifc_path.encode("utf-8")).hexdigest()
ifc_cache_path = os.path.join(context.scene.BIMProperties.data_dir, "cache", f"{ifc_hash}.h5")
# Get all representation contexts to see what we're dealing with.
# Drawings only draw bodies and annotations (and facetation, due to a Revit bug).
# A drawing prioritises a target view context first, followed by a model view context as a fallback.
# Specifically for PLAN_VIEW and REFLECTED_PLAN_VIEW, any Plan context is also prioritised.
target_view = ifcopenshell.util.element.get_psets(self.camera_element)["EPset_Drawing"]["TargetView"]
contexts = self.get_linework_contexts(ifc, target_view)
drawing_elements = tool.Drawing.get_drawing_elements(self.camera_element)
self.setup_serialiser(ifc, target_view)
tree = ifcopenshell.geom.tree()
tree.enable_face_styles(True)
self.serialize_contexts_elements(ifc, tree, contexts, "body", drawing_elements, target_view)
self.serialize_contexts_elements(ifc, tree, contexts, "annotation", drawing_elements, target_view)
if self.camera_element not in drawing_elements:
with profile("Camera element"):
# The camera must always be included, regardless of any include/exclude filters.
geom_settings = ifcopenshell.geom.settings(DISABLE_TRIANGULATION=True, STRICT_TOLERANCE=True)
it = ifcopenshell.geom.iterator(geom_settings, ifc, include=[self.camera_element])
for elem in it:
self.serialiser.write(elem)
with profile("Finalizing"):
self.serialiser.finalize()
results = self.svg_buffer.get_value()
root = etree.fromstring(results)
group = root.find("{http://www.w3.org/2000/svg}g")
if group is None:
with open(svg_path, "wb") as svg:
svg.write(etree.tostring(root))
return svg_path
self.move_projection_to_bottom(root)
self.merge_linework_and_add_metadata(root)
if self.camera.data.BIMCameraProperties.calculate_shapely_surfaces:
# shapely variant
group = root.find("{http://www.w3.org/2000/svg}g")
nm = group.attrib["{http://www.ifcopenshell.org/ns}name"]
m4 = np.array(json.loads(group.attrib["{http://www.ifcopenshell.org/ns}plane"]))
m3 = np.array(json.loads(group.attrib["{http://www.ifcopenshell.org/ns}matrix3"]))
m44 = np.eye(4)
m44[0][0:2] = m3[0][0:2]
m44[1][0:2] = m3[1][0:2]
m44[0][3] = m3[0][2]
m44[1][3] = m3[1][2]
m44 = np.linalg.inv(m44)
elements_with_faces = set()
for element in drawing_elements.copy():
obj = tool.Ifc.get_object(element)
if obj and obj.type == "MESH" and len(obj.data.polygons):
elements_with_faces.add(element.GlobalId)
projections = root.xpath(
".//svg:g[contains(@class, 'projection')]", namespaces={"svg": "http://www.w3.org/2000/svg"}
)
boundary_lines = []
for projection in projections:
global_id = projection.attrib["{http://www.ifcopenshell.org/ns}guid"]
if global_id not in elements_with_faces:
continue
for path in projection.findall("./{http://www.w3.org/2000/svg}path"):
start, end = [[float(o) for o in co[1:].split(",")] for co in path.attrib["d"].split()]
if start == end:
continue
# Extension by 0.5mm is necessary to ensure lines overlap with other diagonal lines
start, end = tool.Drawing.extend_line(start, end, 0.5)
boundary_lines.append(shapely.LineString([start, end]))
unioned_boundaries = shapely.union_all(shapely.GeometryCollection(boundary_lines))
closed_polygons = shapely.polygonize(unioned_boundaries.geoms)
for polygon in closed_polygons.geoms:
# Less than 1mm2 is not worth styling on sheet
if polygon.area < 1:
continue
centroid = polygon.centroid
internal_point = centroid if polygon.contains(centroid) else polygon.representative_point()
if internal_point:
internal_point = [internal_point.x, internal_point.y]
a, b = self.drawing_to_model_co(m44, m4, internal_point, 0.0), self.drawing_to_model_co(
m44, m4, internal_point, -100.0
)
inside_elements = [e for e in tree.select(self.pythonize(a)) if not e.is_a("IfcAnnotation")]
if not inside_elements:
elements = [
e
for e in tree.select_ray(self.pythonize(a), self.pythonize(b - a))
if not e.instance.is_a("IfcAnnotation")
and tool.Cad.is_point_on_edge(
Vector(list(e.position)), (Vector(self.pythonize(a)), Vector(self.pythonize(b)))
)
]
if elements:
path = etree.Element("path")
d = (
"M"
+ " L".join([",".join([str(o) for o in co]) for co in polygon.exterior.coords[0:-1]])
+ " Z"
)
for interior in polygon.interiors:
d += (
" M"
+ " L".join([",".join([str(o) for o in co]) for co in interior.coords[0:-1]])
+ " Z"
)
path.attrib["d"] = d
classes = self.get_svg_classes(ifc.by_id(elements[0].instance.id()))
classes.append(f"intpoint-{internal_point}")
classes.append(f"ab-{a}, {b}")
for i, ray_result in enumerate(elements):
classes.append(f"el{i}-{ray_result.instance.id()}")
classes.append(f"el{i}-pos-{list(ray_result.position)}")
classes.append(f"el{i}-dst-{ray_result.distance}")
classes.append("surface")
path.set("class", " ".join(list(classes)))
group.insert(0, path)
if self.camera.data.BIMCameraProperties.calculate_svgfill_surfaces:
results = etree.tostring(root).decode("utf8")
svg_data_1 = results
from xml.dom.minidom import parseString
def yield_groups(n):
if n.nodeType == n.ELEMENT_NODE and n.tagName == "g":
yield n
for c in n.childNodes:
yield from yield_groups(c)
dom1 = parseString(svg_data_1)
svg1 = dom1.childNodes[0]
groups1 = [g for g in yield_groups(svg1) if "projection" in g.getAttribute("class")]
ls_groups = ifcopenshell.ifcopenshell_wrapper.svg_to_line_segments(results, "projection")
for i, (ls, g1) in enumerate(zip(ls_groups, groups1)):
projection, g1 = g1, g1.parentNode
svgfill_context = ifcopenshell.ifcopenshell_wrapper.context(
ifcopenshell.ifcopenshell_wrapper.EXACT_CONSTRUCTIONS, 1.0e-3
)
# EXACT_CONSTRUCTIONS is significantly faster than FILTERED_CARTESIAN_QUOTIENT
# remove duplicates (without tolerance)
ls = [l for l in map(tuple, set(map(frozenset, ls))) if len(l) == 2 and l[0] != l[1]]
svgfill_context.add(ls)
num_passes = 0
for iteration in range(num_passes + 1):
# initialize empty group, note that in the current approach only one
# group is stored
ps = ifcopenshell.ifcopenshell_wrapper.svg_groups_of_polygons()
if iteration != 0 or svgfill_context.build():
svgfill_context.write(ps)
if iteration != num_passes:
pairs = svgfill_context.get_face_pairs()
semantics = [None] * (max(pairs) + 1)
# Reserialize cells into an SVG string
svg_data_2 = ifcopenshell.ifcopenshell_wrapper.polygons_to_svg(ps, True)
# We parse both SVG files to create on document with the combination of sections from
# the output directly from the serializer and the cells found from the hidden line
# rendering
dom2 = parseString(svg_data_2)
svg2 = dom2.childNodes[0]
# file 2 only has the groups we are interested in.
# in fact in the approach, it's only a single group
g2 = list(yield_groups(svg2))[0]
# These are attributes on the original group that we can use to reconstruct
# a 4x4 matrix of the projection used in the SVG generation process
nm = g1.getAttribute("ifc:name")
m4 = np.array(json.loads(g1.getAttribute("ifc:plane")))
m3 = np.array(json.loads(g1.getAttribute("ifc:matrix3")))
m44 = np.eye(4)
m44[0][0:2] = m3[0][0:2]
m44[1][0:2] = m3[1][0:2]
m44[0][3] = m3[0][2]
m44[1][3] = m3[1][2]
m44 = np.linalg.inv(m44)
# Loop over the cell paths
for pi, p in enumerate(g2.getElementsByTagName("path")):
d = p.getAttribute("d")
coords = [co[1:].split(",") for co in d.split() if co[1:]]
polygon = shapely.Polygon(coords)
# 1mm2 polygons aren't worth styling in paperspace. Raycasting is expensive!
if polygon.area < 1:
continue
# point inside is an attribute that comes from line_segments_to_polygons() polygons_to_svg?
# it is an arbitrary point guaranteed to be inside the polygon and outside
# of any potential inner bounds. We can use this to construct a ray to find
# the face of the IFC element that the cell belongs to.
assert p.hasAttribute("ifc:pointInside")
xy = list(map(float, p.getAttribute("ifc:pointInside").split(",")))
a, b = self.drawing_to_model_co(m44, m4, xy, 0.0), self.drawing_to_model_co(m44, m4, xy, -100.0)
inside_elements = [e for e in tree.select(self.pythonize(a)) if not e.is_a("IfcAnnotation")]
if inside_elements:
elements = None
if iteration != num_passes:
semantics[pi] = (inside_elements[0], -1)
else:
elements = [
e
for e in tree.select_ray(self.pythonize(a), self.pythonize(b - a))
if not e.instance.is_a("IfcAnnotation")
]
if elements:
classes = self.get_svg_classes(ifc.by_id(elements[0].instance.id()))
classes.append("projection")
if iteration != num_passes:
semantics[pi] = elements[0]
else:
classes = ["projection"]
p.setAttribute("style", "")
p.setAttribute("class", " ".join(classes))
if iteration != num_passes:
to_remove = []
for he_idx in range(0, len(pairs), 2):
# @todo instead of ray_distance, better do (x.point - y.point).dot(x.normal)
# to see if they're coplanar, because ray-distance will be different in case
# of element surfaces non-orthogonal to the view direction
def format(x):
if x is None:
return None
elif isinstance(x, tuple):
# found to be inside element using tree.select() no face or style info
return x
else:
return (x.instance.is_a(), x.ray_distance, tuple(x.position))
pp = pairs[he_idx : he_idx + 2]
if pp == (-1, -1):
continue
data = list(map(format, map(semantics.__getitem__, pp)))
if None not in data and data[0][0] == data[1][0] and abs(data[0][1] - data[1][1]) < 1.0e-5:
to_remove.append(he_idx // 2)
# Print edge index and semantic data
# print(he_idx // 2, *data)
svgfill_context.merge(to_remove)
# Swap the XML nodes from the files
# Remove the original hidden line node we still have in the serializer output
g1.removeChild(projection)
g2.setAttribute("class", "projection")
# Find the children of the projection node parent
children = [x for x in g1.childNodes if x.nodeType == x.ELEMENT_NODE]
if children:
# Insert the new semantically enriched cell-based projection node
# *before* the node with sections from the serializer. SVG derives
# draw order from node order in the DOM so sections are draw over
# the projections.
g1.insertBefore(g2, children[0])
else:
# This generally shouldn't happen
g1.appendChild(g2)
results = dom1.toxml()
results = results.encode("ascii", "xmlcharrefreplace")
root = etree.fromstring(results)
# Spaces are handled as a special case, since they are often overlayed
# in addition to elements. For example, a space should not obscure
# other elements in projection. Spaces should also not override cut
# elements but instead be drawn in addition to cut elements.
spaces = tool.Drawing.get_drawing_spaces(self.camera_element)
group = root.findall(".//{http://www.w3.org/2000/svg}g")[0]
self.svg_writer.calculate_scale()
x_offset = self.svg_writer.raw_width / 2
y_offset = self.svg_writer.raw_height / 2
for space in spaces:
obj = tool.Ifc.get_object(space)
if not obj or not tool.Drawing.is_intersecting_camera(obj, self.camera):
continue
verts, edges = tool.Drawing.bisect_mesh(obj, self.camera)
verts = [self.svg_writer.project_point_onto_camera(Vector(v)) for v in verts]
line_strings = [
shapely.LineString(
[
(
(x_offset + verts[e[0]][0]) * self.svg_writer.svg_scale,
(y_offset - verts[e[0]][1]) * self.svg_writer.svg_scale,
),
(
(x_offset + verts[e[1]][0]) * self.svg_writer.svg_scale,
(y_offset - verts[e[1]][1]) * self.svg_writer.svg_scale,
),
]
)
for e in edges
]
closed_polygons = shapely.polygonize(line_strings)
for polygon in closed_polygons.geoms:
classes = self.get_svg_classes(space)
path = etree.Element("path")
d = "M" + " L".join([",".join([str(o) for o in co]) for co in polygon.exterior.coords[0:-1]]) + " Z"
for interior in polygon.interiors:
d += " M" + " L".join([",".join([str(o) for o in co]) for co in interior.coords[0:-1]]) + " Z"
path.attrib["d"] = d
path.set("class", " ".join(list(classes)))
group.append(path)
with open(svg_path, "wb") as svg:
svg.write(etree.tostring(root))
return svg_path
def setup_serialiser(self, ifc, target_view):
self.svg_settings = ifcopenshell.geom.settings(
DISABLE_TRIANGULATION=True, STRICT_TOLERANCE=True, INCLUDE_CURVES=True
)
self.svg_buffer = ifcopenshell.geom.serializers.buffer()
self.serialiser = ifcopenshell.geom.serializers.svg(self.svg_buffer, self.svg_settings)
self.serialiser.setFile(ifc)
self.serialiser.setWithoutStoreys(True)
self.serialiser.setPolygonal(True)
self.serialiser.setUseHlrPoly(True)
# Objects with more than these edges are rendered as wireframe instead of HLR for optimisation
self.serialiser.setProfileThreshold(10000)
self.serialiser.setUseNamespace(True)
self.serialiser.setAlwaysProject(True)
self.serialiser.setAutoElevation(False)
self.serialiser.setAutoSection(False)
self.serialiser.setPrintSpaceNames(False)
self.serialiser.setPrintSpaceAreas(False)
self.serialiser.setDrawDoorArcs(False)
self.serialiser.setNoCSS(True)
self.serialiser.setElevationRefGuid(self.camera_element.GlobalId)
self.serialiser.setScale(self.scale)
self.serialiser.setSubtractionSettings(ifcopenshell.ifcopenshell_wrapper.ALWAYS)
self.serialiser.setUsePrefiltering(True) # See #3359
self.serialiser.setUnifyInputs(True)
self.serialiser.setSegmentProjection(True)
if target_view == "REFLECTED_PLAN_VIEW":
self.serialiser.setMirrorY(True)
# tree = ifcopenshell.geom.tree()
# This instructs the tree to explode BReps into faces and return
# the style of the face when running tree.select_ray()
# tree.enable_face_styles(True)
def get_svg_classes(self, element):
classes = [element.is_a()]
material = ifcopenshell.util.element.get_material(element, should_skip_usage=True)
material_name = ""
if material:
if material.is_a("IfcMaterialLayerSet"):
material_name = material.LayerSetName or "null"
else:
material_name = getattr(material, "Name", "null") or "null"
material_name = tool.Drawing.canonicalise_class_name(material_name)
classes.append(f"material-{material_name}")
else:
classes.append(f"material-null")
for key in self.metadata:
value = ifcopenshell.util.selector.get_element_value(element, key)
if value:
classes.append(
tool.Drawing.canonicalise_class_name(key) + "-" + tool.Drawing.canonicalise_class_name(str(value))
)
return classes
def is_manifold(self, obj):
result = self.is_manifold_cache.get(obj.data.name, None)
if result is not None:
return result
bm = bmesh.new()
bm.from_mesh(obj.data)
for edge in bm.edges:
if not edge.is_manifold:
bm.free()
self.is_manifold_cache[obj.data.name] = False
return False
self.is_manifold_cache[obj.data.name] = True
return True
def merge_linework_and_add_metadata(self, root):
join_criteria = ifcopenshell.util.element.get_pset(self.camera_element, "EPset_Drawing", "JoinCriteria")
if join_criteria:
join_criteria = join_criteria.split(",")
else:
# Drawing convention states that same objects classes with the same material are merged when cut.
join_criteria = ["class", "material.Name", "/Pset_.*Common/.Status", "EPset_Status.Status"]
group = root.find("{http://www.w3.org/2000/svg}g")
joined_paths = {}
self.is_manifold_cache = {}
ifc = tool.Ifc.get()
for el in root.findall(".//{http://www.w3.org/2000/svg}g[@{http://www.ifcopenshell.org/ns}guid]"):
element = ifc.by_guid(el.get("{http://www.ifcopenshell.org/ns}guid"))
if "projection" in el.get("class", "").split():
classes = self.get_svg_classes(element)
classes.append("projection")
el.set("class", " ".join(classes))
continue
else:
classes = self.get_svg_classes(element)
classes.append("cut")
el.set("class", " ".join(classes))
obj = tool.Ifc.get_object(element)
if not self.is_manifold(obj):
continue
# An element group will contain a bunch of paths representing the
# cut of that element. However IfcOpenShell may not correctly
# create closed paths. We post-process all paths with shapely to
# ensure things that should be closed (i.e.
# shapely.polygonize_full) are, and things which aren't are left
# alone (e.g. dangles, cuts, invalids). See #3421.
line_strings = []
old_paths = []
has_open_paths = False
for path in el.findall("{http://www.w3.org/2000/svg}path"):
for subpath in path.attrib["d"].split("M")[1:]:
subpath = "M" + subpath.strip()
coords = [[float(o) for o in co[1:].split(",")] for co in subpath.split()]
if coords[0] != coords[-1]:
has_open_paths = True
line_strings.append(shapely.LineString(coords))
old_paths.append(path)
results = []
if has_open_paths:
unioned_line_strings = shapely.union_all(shapely.GeometryCollection(line_strings))
if hasattr(unioned_line_strings, "geoms"):
results = shapely.polygonize_full(unioned_line_strings.geoms)
# If we succeeded in generating new path geometry, remove all the
# old paths and add new ones.
if results:
for path in old_paths:
path.getparent().remove(path)
for result in results:
for geom in result.geoms:
path = etree.SubElement(el, "{http://www.w3.org/2000/svg}path")
if isinstance(geom, shapely.Polygon):
d = (
"M"