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Import rebar more efficiently without needing to create a profile

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Dion Moult
2020-05-01 10:23:19 +10:00
parent 9d9911c4c0
commit 7b5d8a4079
1 changed files with 1 additions and 30 deletions
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src/ifcblenderexport/blenderbim/bim/import_ifc.py
+1 -30
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@@ -292,40 +292,12 @@ class IfcImporter():
def parse_native_products(self):
# TODO: simple code for now as we only treat rebar specially
self.native_data['rebar_profiles'] = {}
for element in self.file.by_type('IfcReinforcingBar'):
for representation in element.Representation.Representations:
self.replace_with_directrix(representation, element)
for item in representation.Items:
if item.is_a('IfcMappedItem'):
self.replace_with_directrix(item.MappingSource.MappedRepresentation, element)
for radius in self.native_data['rebar_profiles'].keys():
obj = bpy.data.objects.new('rebar-profile-{}'.format(radius), self.create_bezier_circle(radius))
self.native_data['rebar_profiles'][radius] = obj
bpy.context.scene.collection.objects.link(obj)
def create_bezier_circle(self, radius):
curve = bpy.data.curves.new('circle-profile', type='CURVE')
spline = curve.splines.new('BEZIER')
spline.use_cyclic_u = True
spline.bezier_points.add(3)
approx_distance = (4/3)*math.tan(math.pi/(2*4))
for i in range(0, 4):
spline.bezier_points[i].handle_left_type = 'AUTO'
spline.bezier_points[i].handle_right_type = 'AUTO'
spline.bezier_points[0].co = mathutils.Vector((-radius, 0, 0))
spline.bezier_points[0].handle_left = mathutils.Vector((-radius, -approx_distance, 0))
spline.bezier_points[0].handle_right = mathutils.Vector((-radius, approx_distance, 0))
spline.bezier_points[1].co = mathutils.Vector((0, radius, 0))
spline.bezier_points[1].handle_left = mathutils.Vector((-approx_distance, radius, 0))
spline.bezier_points[1].handle_right = mathutils.Vector((approx_distance, radius, 0))
spline.bezier_points[2].co = mathutils.Vector((radius, 0, 0))
spline.bezier_points[2].handle_left = mathutils.Vector((radius, approx_distance, 0))
spline.bezier_points[2].handle_right = mathutils.Vector((radius, -approx_distance, 0))
spline.bezier_points[3].co = mathutils.Vector((0, -radius, 0))
spline.bezier_points[3].handle_left = mathutils.Vector((approx_distance, -radius, 0))
spline.bezier_points[3].handle_right = mathutils.Vector((-approx_distance, -radius, 0))
return curve
def replace_with_directrix(self, representation, element):
new_items = []
@@ -334,7 +306,6 @@ class IfcImporter():
new_items.append(item.Directrix)
radius = round(self.unit_scale * item.Radius, 3)
self.native_elements[element.GlobalId] = { 'radius': radius }
self.native_data['rebar_profiles'][radius] = None
else:
new_items.append(item)
representation.Items = new_items
@@ -489,7 +460,7 @@ class IfcImporter():
# TODO: figure out a design pattern for native objects
if element.is_a('IfcReinforcingBar'):
mesh = self.create_mesh(element, shape, is_curve=True)
mesh.bevel_object = self.native_data['rebar_profiles'][self.native_elements[element.GlobalId]['radius']]
mesh.bevel_depth = self.native_elements[element.GlobalId]['radius']
mesh.use_fill_caps = True
else:
mesh = self.create_mesh(element, shape)