326 lines
9.7 KiB
Python
326 lines
9.7 KiB
Python
import math
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from dataclasses import dataclass, field
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import cadquery as Cq
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from nhf import Material, Role
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from nhf.build import Model, target, assembly, TargetKind
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import nhf.utils
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@dataclass
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class Rod(Model):
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width: float = 120.0
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length: float = 550.0
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length_tip: float = 100.0
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width_tail: float = 60.0
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margin: float = 10.0
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thickness_top: float = 25.4 / 4
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thickness_side: float = 25.4 / 8
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# counted from middle to the bottom
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fac_bar_top: float = 0.1
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# counted from bottom to top
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fac_window_tsumi_bot: float = 0.63
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fac_window_tsumi_top: float = 0.88
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fac_window_footer_bot: float = 0.33
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fac_window_footer_top: float = 0.59
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material_shell: Material = Material.WOOD_BIRCH
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def __post_init__(self):
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super().__init__(name="rod")
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self.loc_core = Cq.Location.from2d(self.length - self.length_tip, 0)
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assert self.length_tip * 2 < self.length
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#assert self.fac_bar_top + self.fac_window_tsumi_top < 1
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assert self.fac_window_tsumi_bot < self.fac_window_tsumi_top
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@property
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def length_tail(self):
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return self.length - self.length_tip
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@property
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def _reduced_tip_x(self):
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return self.length_tip - self.margin
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@property
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def _reduced_y(self):
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return self.width / 2 - self.margin
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@property
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def _reduced_tail_y(self):
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return self.width_tail / 2 - self.margin
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def _window_tip(self) -> Cq.Sketch:
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dxh = self._reduced_tip_x
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dy = self._reduced_y
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return (
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Cq.Sketch()
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.segment(
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(dxh, 0),
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(dxh / 2, dy / 2),
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)
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.bezier([
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(dxh / 2, dy / 2),
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(dxh * 0.6, dy * 0.4),
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(dxh * 0.6, -dy * 0.4),
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(dxh / 2, -dy / 2),
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])
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.segment(
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(dxh, 0),
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)
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.assemble()
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.moved(self.loc_core.to2d_pos())
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)
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def _window_eye(self, refl: bool = False) -> Cq.Sketch:
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sign = -1 if refl else 1
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dxh = self._reduced_tip_x
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xm = dxh * 0.45
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dy = sign * self._reduced_y
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fac = 0.05
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p1 = Cq.Location.from2d(xm, sign * self.margin / 2)
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p2 = Cq.Location.from2d(dxh * 0.1, sign * self.margin / 2)
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p3 = Cq.Location.from2d(dxh * 0.15, dy * 0.55)
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p4 = Cq.Location.from2d(dxh * 0.4, dy * 0.45)
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d4 = Cq.Location.from2d(dxh * fac, -dy * fac)
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return (
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Cq.Sketch()
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.segment(
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p1.to2d_pos(),
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p2.to2d_pos(),
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)
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.bezier([
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p2.to2d_pos(),
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(p2 * Cq.Location.from2d(0, dy * fac)).to2d_pos(),
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(p3 * Cq.Location.from2d(-dxh * fac, -dy * fac)).to2d_pos(),
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p3.to2d_pos(),
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])
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.bezier([
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p3.to2d_pos(),
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(p3 * Cq.Location.from2d(0, dy * fac)).to2d_pos(),
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(p4 * d4.inverse).to2d_pos(),
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p4.to2d_pos(),
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])
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.bezier([
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p4.to2d_pos(),
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(p4 * d4).to2d_pos(),
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(p1 * Cq.Location.from2d(0, dy * fac)).to2d_pos(),
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p1.to2d_pos(),
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])
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.assemble()
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.moved(self.loc_core.to2d_pos())
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)
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def _window_bar(self) -> Cq.Sketch():
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dxh = self._reduced_tip_x
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dy = self._reduced_y
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dyt = self._reduced_tail_y
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dxt = self.length_tail
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ext_fac = self.fac_bar_top
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p_corner = Cq.Location.from2d(0, dy)
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p_top = Cq.Location.from2d(0.3 * dxh, 0.7 * dy)
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p_bot = Cq.Location.from2d(-ext_fac * dxt, dy + ext_fac * (dyt - dy))
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p_top_int = p_corner * Cq.Location.from2d(.05 * dxh, -.2 * dy)
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p_top_ctrl = Cq.Location.from2d(0, .3 * dy)
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p_bot_int = p_corner * Cq.Location.from2d(-.15 * dxh, -.2 * dy)
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p_bot_ctrl = Cq.Location.from2d(-.25 * dxh, .3 * dy)
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return (
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Cq.Sketch()
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.segment(
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p_corner.to2d_pos(),
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p_top.to2d_pos(),
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)
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.segment(p_top_int.to2d_pos())
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.bezier([
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p_top_int.to2d_pos(),
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p_top_ctrl.to2d_pos(),
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p_top_ctrl.flip_y().to2d_pos(),
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p_top_int.flip_y().to2d_pos(),
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])
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.segment(p_top.flip_y().to2d_pos())
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.segment(p_corner.flip_y().to2d_pos())
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.segment(p_bot.flip_y().to2d_pos())
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.segment(p_bot_int.flip_y().to2d_pos())
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.bezier([
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p_bot_int.flip_y().to2d_pos(),
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p_bot_ctrl.flip_y().to2d_pos(),
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p_bot_ctrl.to2d_pos(),
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p_bot_int.to2d_pos(),
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])
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.segment(p_bot.to2d_pos())
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.segment(p_corner.to2d_pos())
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.assemble()
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.moved(self.loc_core.to2d_pos())
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)
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def _window_tsumi(self) -> Cq.Sketch:
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dx = (self.fac_window_tsumi_top - self.fac_window_tsumi_bot) * self.length_tail
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dy = 2 * self._reduced_y * 0.8
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loc = Cq.Location(self.fac_window_tsumi_bot * self.length_tail, 0)
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# Construction of the top part of the kanji
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dx_top = dx * 0.3
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x_top = dx - dx_top / 2
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dy_top = dy
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dy_eye = dy * 0.2
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dy_border = (dy_top - 3 * dy_eye) / 4
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# The skip must follow 3 * eye + 4 * border = dy_top
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y_skip = dy_eye + dy_border
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# Construction of the bottom part
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x_bot = dx * 0.6
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y3 = dy * 0.4
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y2 = dy * 0.2
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y1 = dy * 0.1
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# x/y-centers of the legs
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x_leg0 = x_bot / 14
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dx_leg = x_bot / 7
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y_leg = (y3 + y1) / 2
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return (
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Cq.Sketch()
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.push([(x_top, 0)])
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.rect(dx_top, dy_top)
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.push([
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(x_top, -y_skip),
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(x_top, 0),
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(x_top, y_skip),
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])
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.rect(dx_top / 3, dy_eye, mode='s')
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# Construct the two sides
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.push([
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(x_bot / 2, (y2 + y1) / 2),
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(x_bot / 2, -(y2 + y1) / 2),
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])
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.rect(x_bot, y2 - y1, mode='a')
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.push([
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(x_leg0 + dx_leg, y_leg),
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(x_leg0 + 3 * dx_leg, y_leg),
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(x_leg0 + 5 * dx_leg, y_leg),
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(x_leg0 + dx_leg, -y_leg),
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(x_leg0 + 3 * dx_leg, -y_leg),
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(x_leg0 + 5 * dx_leg, -y_leg),
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])
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.rect(dx_leg, y3 - y1, mode='a')
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.moved(loc)
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)
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def _window_footer(self) -> Cq.Sketch:
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x_bot = self.fac_window_footer_bot * self.length_tail
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dx = (self.fac_window_footer_top - self.fac_window_footer_bot) * self.length_tail
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loc = Cq.Location(x_bot, 0)
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dy = self._reduced_y * 0.8
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# eyes
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eye_y2 = dy * .5
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eye_y1 = dy * .2
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eye_width = eye_y2 - eye_y1
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eye_x = dx - eye_width / 2
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# bar polygon
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bar_x0 = dx * 0.65
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bar_dx = dx * 0.1
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bar_x1 = bar_x0 + bar_dx
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bar_x2 = bar_x0 + bar_dx * 2
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bar_x3 = bar_x0 + bar_dx * 3
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bar_y1 = dy * .75
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assert bar_y1 > eye_y2
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bar_y2 = dy * .9
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assert bar_y1 < bar_y2
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# Construction of the cross
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cross_dx = dx * 0.7 / math.sqrt(2)
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cross_dy = dy * 0.2
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cross = (
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Cq.Sketch()
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.rect(cross_dx, cross_dy)
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.rect(cross_dy, cross_dx, mode='a')
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.moved(Cq.Location.from2d(dx * 0.5, 0, 45))
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)
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return (
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Cq.Sketch()
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# eyes
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.push([
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(eye_x, (eye_y1 + eye_y2)/2),
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(eye_x, -(eye_y1 + eye_y2)/2),
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])
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.rect(eye_width, eye_width, mode='a')
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# middle bar
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.push([(0,0)])
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.polygon([
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(bar_x1, bar_y1),
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(bar_x0, bar_y1),
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(bar_x0, bar_y2),
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(bar_x3, bar_y2),
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(bar_x3, bar_y1),
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(bar_x2, bar_y1),
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(bar_x2, -bar_y1),
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(bar_x3, -bar_y1),
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(bar_x3, -bar_y2),
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(bar_x0, -bar_y2),
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(bar_x0, -bar_y1),
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(bar_x1, -bar_y1),
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], mode='a')
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# cross
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.boolean(cross, mode='a')
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#.push([(0,0)])
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#.rect(10, 10)
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.moved(loc)
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)
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@target(name="surface", kind=TargetKind.DXF)
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def profile_top(self) -> Cq.Sketch:
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sketch = (
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Cq.Sketch()
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.polygon([
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(self.length, 0),
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(self.length - self.length_tip, self.width/2),
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(0, self.width_tail / 2),
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(0, -self.width_tail / 2),
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(self.length - self.length_tip, -self.width/2),
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])
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)
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sketch = (
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sketch
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.boolean(self._window_tip(), mode='s')
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.boolean(self._window_eye(True), mode='s')
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.boolean(self._window_eye(False), mode='s')
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.boolean(self._window_bar(), mode='s')
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.boolean(self._window_tsumi(), mode='s')
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.boolean(self._window_footer(), mode='s')
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)
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return sketch
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def surface_top(self) -> Cq.Workplane:
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return (
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Cq.Workplane('XZ')
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.placeSketch(self.profile_top())
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.extrude(self.thickness_top)
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)
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@assembly()
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def assembly(self) -> Cq.Assembly:
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a = (
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Cq.Assembly()
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.addS(
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self.surface_top(),
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name="top",
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material=self.material_shell,
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role=Role.STRUCTURE | Role.DECORATION
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)
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)
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return a
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