80 lines
2.1 KiB
Python
80 lines
2.1 KiB
Python
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from nhf.build import Model, TargetKind, target, assembly, submodel
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from nhf.materials import Role, Material
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import nhf.utils
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import math
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from dataclasses import dataclass
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import cadquery as Cq
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@dataclass
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class Onbashira(Model):
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n_side: int = 6
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# Dimensions of each side panel
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side_width: float = 200.0
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side_length: float = 600.0
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side_thickness: float = 25.4 / 8
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material_side: Material = Material.WOOD_BIRCH
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material_brace: Material = Material.ALUMINUM
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def __post_init__(self):
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assert self.n_side >= 3
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@property
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def angle_side(self) -> float:
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return 360 / self.n_side
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@property
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def angle_dihedral(self) -> float:
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return 180 - self.angle_side
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@property
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def barrel_radius(self) -> float:
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"""
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Calculate radius of the barrel to the centre
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"""
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return self.side_width / 2 / math.tan(math.radians(self.angle_side / 2))
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@target(name="side-panel", kind=TargetKind.DXF)
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def profile_side_panel(self) -> Cq.Sketch:
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return (
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Cq.Sketch()
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.rect(self.side_width, self.side_length)
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)
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def side_panel(self) -> Cq.Workplane:
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w = self.side_width
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l = self.side_length
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result = (
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Cq.Workplane()
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.placeSketch(self.profile_side_panel())
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.extrude(self.side_thickness)
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)
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intersector = (
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Cq.Workplane('XZ')
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.polyline([
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(-w/2, 0),
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(w/2, 0),
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(0, self.barrel_radius),
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])
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.close()
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.extrude(l)
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.translate(Cq.Vector(0, l/2,0))
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)
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# Intersect the side panel
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return result * intersector
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def assembly(self) -> Cq.Assembly:
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a = Cq.Assembly()
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side = self.side_panel()
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r = self.barrel_radius
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for i in range(6):
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a = a.addS(
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side,
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name=f"side{i}",
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material=self.material_side,
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role=Role.STRUCTURE | Role.DECORATION,
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loc=Cq.Location(0,0,0,0,i*60,0) * Cq.Location(0,0,-r)
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)
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return a
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