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bends - support for start and end segments

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This commit is contained in:
Andrej730
2023-09-12 15:25:54 +05:00
parent 959f05d154
commit e7b6fad348
3 changed files with 54 additions and 23 deletions
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src/ifcopenshell-python/ifcopenshell/util/shape_builder.py
+47 -14
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@@ -1356,10 +1356,26 @@ class ShapeBuilder:
O[lateral_axis] = (radius + profile_dim[lateral_axis]) * lateral_sign
theta = angle
def get_circle_point(angle, radius):
point = V(0, 0, 0)
angle -= pi / 2
# fmt: off
point.z = z_sign * cos(angle) * radius
point[lateral_axis] = lateral_sign * sin(angle) * radius
# fmt: on
return point
def get_circle_tangent(angle):
tangent = V(0, 0, 0)
tangent.z = cos(angle) * z_sign
tangent[lateral_axis] = sin(angle) * lateral_sign
return tangent
def get_bend_representation_item():
if is_circular_profile:
theta_segments = [0, theta / 2, theta]
else:
# TODO: try to replace with curves instead of segments
# get as much segment_length segments as possible
segment_length = pi / 20
num_segments = ceil(theta / segment_length)
@@ -1371,32 +1387,27 @@ class ShapeBuilder:
r = radius
if is_circular_profile:
r += profile_dim[lateral_axis]
else:
outer_r = r + 2 * profile_dim[lateral_axis]
for cur_theta in theta_segments:
cur_theta -= pi / 2
inner = V(0, 0, 0)
# fmt: off
inner.z = z_sign * cos(cur_theta) * r
inner[lateral_axis] = lateral_sign * sin(cur_theta) * r
inner_points.append(inner)
inner_points.append(get_circle_point(cur_theta, r))
if not is_circular_profile:
outer = V(0, 0, 0)
outer.z = z_sign * cos(cur_theta) * (r + 2 * profile_dim[lateral_axis])
outer[lateral_axis] = lateral_sign * sin(cur_theta) * (r + 2 * profile_dim[lateral_axis])
outer_points.append(outer)
# fmt: on
outer_points.append(get_circle_point(cur_theta, outer_r))
points = inner_points + outer_points[::-1]
points = [p + O for p in points]
offset = V(0, 0, 0)
offset.z = z_sign * start_length
if is_circular_profile:
bend_path = self.polyline(points, closed=False, arc_points=[1])
bend_path = self.polyline(points, closed=False, arc_points=[1], position_offset=offset)
bend = self.create_swept_disk_solid(bend_path, profile_dim[lateral_axis])
else:
main_axes = lambda v: getattr(v, "xy"[lateral_axis] + "z")
offset = V(0, 0, 0)
offset[non_lateral_axis] = -profile_dim[non_lateral_axis]
extrusion_kwargs = self.extrude_kwargs("XY"[non_lateral_axis])
profile_curve = self.polyline([main_axes(p) for p in points], closed=True)
bend = self.extrude(
@@ -1405,6 +1416,28 @@ class ShapeBuilder:
return bend
rep_items.append(get_bend_representation_item())
if start_length:
rep_items.append(self.extrude(profile, start_length, extrusion_vector=V(0, 0, z_sign)))
if end_length:
end_position = O + get_circle_point(theta, radius + profile_dim[lateral_axis])
end_position.z += start_length * z_sign
# define extrusion space for the segment after the bend
z_axis = get_circle_tangent(theta)
extrude_kwargs = {
"position_z_axis": z_axis,
"extrusion_vector": Vector((0, 0, 1)),
}
# since we are sure that tangent involves only two axis
# it's safe to assume that non lateral axis is untouched
if lateral_axis == 0:
x_axis = z_axis.cross(Vector((0, 1, 0)))
else:
x_axis = Vector((1, 0, 0))
extrude_kwargs["position_x_axis"] = x_axis
rep_items.append(self.extrude(profile, end_length, end_position, **extrude_kwargs))
body = ifcopenshell.util.representation.get_context(self.file, "Model", "Body", "MODEL_VIEW")
rep = self.get_representation(body, rep_items)