184 lines
6.3 KiB
Python
184 lines
6.3 KiB
Python
"""
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To build, execute
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```
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python3 nhf/touhou/houjuu_nue/__init__.py
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```
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This cosplay consists of 3 components:
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## Trident
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The trident is composed of individual segments, made of acrylic, and a 3D
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printed head (convention rule prohibits metal) with a metallic paint. To ease
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transportation, the trident handle has individual segments with threads and can
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be assembled on site.
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## Snake
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A 3D printed snake with a soft material so it can wrap around and bend
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## Wings
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This is the crux of the cosplay and the most complex component. The wings mount
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on a wearable harness. Each wing consists of 4 segments with 3 joints. Parts of
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the wing which demands transluscency are created from 1/16" acrylic panels.
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These panels serve double duty as the exoskeleton.
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The wings are labeled r1,r2,r3,l1,l2,l3. The segments of the wings are labeled
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from root to tip s0 (root),
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s1, s2, s3. The joints are named (from root to tip)
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shoulder, elbow, wrist in analogy with human anatomy.
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"""
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from dataclasses import dataclass, field
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import cadquery as Cq
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from nhf.build import Model, TargetKind, target, assembly
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from nhf.parts.joints import HirthJoint, TorsionJoint
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from nhf.parts.handle import Handle, BayonetMount
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import nhf.touhou.houjuu_nue.wing as MW
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import nhf.touhou.houjuu_nue.trident as MT
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import nhf.touhou.houjuu_nue.joints as MJ
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import nhf.touhou.houjuu_nue.harness as MH
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import nhf.utils
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@dataclass
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class Parameters(Model):
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"""
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Defines dimensions for the Houjuu Nue cosplay
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"""
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# Thickness of the exoskeleton panel in millimetres
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panel_thickness: float = 25.4 / 16
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# Harness
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harness: MH.Harness = field(default_factory=lambda: MH.Harness())
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hs_hirth_joint: HirthJoint = field(default_factory=lambda: HirthJoint(
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radius=30,
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radius_inner=20,
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tooth_height=10,
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base_height=5,
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n_tooth=24
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))
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wing_profile: MW.WingProfile = field(default_factory=lambda: MW.WingProfile(
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shoulder_joint=MJ.ShoulderJoint(
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height=100.0,
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),
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elbow_joint=MJ.ElbowJoint(),
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wrist_joint=MJ.ElbowJoint(),
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elbow_height=110.0,
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))
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# Exterior radius of the wing root assembly
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wing_root_radius: float = 40
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wing_root_wall_thickness: float = 8
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"""
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Heights for various wing joints, where the numbers start from the first
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joint.
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"""
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wing_s0_thickness: float = 40
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# Length of the spacer
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wing_s1_thickness: float = 20
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wing_s1_spacer_thickness: float = 25.4 / 8
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wing_s1_spacer_width: float = 20
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wing_s1_spacer_hole_diam: float = 8
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wing_s1_shoulder_spacer_hole_dist: float = 20
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wing_s1_shoulder_spacer_width: float = 60
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trident_handle: Handle = field(default_factory=lambda: Handle(
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diam=38,
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diam_inner=38-2 * 25.4/8,
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diam_connector_internal=18,
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simplify_geometry=False,
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mount=BayonetMount(n_pin=3),
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))
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trident_terminal_height: float = 80
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trident_terminal_hole_diam: float = 24
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trident_terminal_bottom_thickness: float = 10
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def __post_init__(self):
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super().__init__(name="houjuu-nue")
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self.harness.hs_hirth_joint = self.hs_hirth_joint
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self.wing_profile.base_joint = self.hs_hirth_joint
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assert self.wing_root_radius > self.hs_hirth_joint.radius, \
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"Wing root must be large enough to accomodate joint"
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assert self.wing_s1_shoulder_spacer_hole_dist > self.wing_s1_spacer_hole_diam, \
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"Spacer holes are too close to each other"
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@target(name="trident/handle-connector")
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def handle_connector(self):
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return self.trident_handle.connector()
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@target(name="trident/handle-insertion")
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def handle_insertion(self):
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return self.trident_handle.insertion()
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@target(name="trident/proto-handle-connector", prototype=True)
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def proto_handle_connector(self):
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return self.trident_handle.one_side_connector(height=15)
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@target(name="trident/handle-terminal-connector")
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def handle_terminal_connector(self):
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result = self.trident_handle.one_side_connector(height=self.trident_terminal_height)
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#result.faces("<Z").circle(radius=25/2).cutThruAll()
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h = self.trident_terminal_height + self.trident_handle.insertion_length - self.trident_terminal_bottom_thickness
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result = result.faces(">Z").hole(self.trident_terminal_hole_diam, depth=h)
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return result
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@target(name="harness", kind=TargetKind.DXF)
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def harness_profile(self) -> Cq.Sketch:
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return self.harness.profile()
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def harness_surface(self) -> Cq.Workplane:
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return self.harness.surface()
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def hs_joint_parent(self) -> Cq.Workplane:
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return self.harness.hs_joint_parent()
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@assembly()
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def harness_assembly(self) -> Cq.Assembly:
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return self.harness.assembly()
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@target(name="wing/proto-shoulder-joint-parent", prototype=True)
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def proto_shoulder_joint_parent(self):
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return self.wing_profile.shoulder_joint.torsion_joint.track()
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@target(name="wing/proto-shoulder-joint-child", prototype=True)
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def proto_shoulder_joint_child(self):
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return self.wing_profile.shoulder_joint.torsion_joint.rider()
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@assembly()
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def wing_r1_assembly(self) -> Cq.Assembly:
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return self.wing_profile.assembly()
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@assembly()
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def wings_harness_assembly(self) -> Cq.Assembly:
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"""
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Assembly of harness with all the wings
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"""
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a_tooth = self.hs_hirth_joint.tooth_angle
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result = (
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Cq.Assembly()
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.add(self.harness_assembly(), name="harness", loc=Cq.Location((0, 0, 0)))
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.add(self.wing_r1_assembly(), name="wing_r1")
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.add(self.wing_r1_assembly(), name="wing_r2")
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.add(self.wing_r1_assembly(), name="wing_r3")
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)
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self.hs_hirth_joint.add_constraints(result, "harness/r1", "wing_r1/s0/hs", angle=9)
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self.hs_hirth_joint.add_constraints(result, "harness/r2", "wing_r2/s0/hs", angle=8)
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self.hs_hirth_joint.add_constraints(result, "harness/r3", "wing_r3/s0/hs", angle=7)
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return result.solve()
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@assembly(collision_check=False)
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def trident_assembly(self) -> Cq.Assembly:
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"""
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Disable collision check since the threads may not align.
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"""
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return MT.trident_assembly(self.trident_handle)
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if __name__ == '__main__':
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p = Parameters()
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p.build_all()
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