Cosplay/nhf/parts/box.py

import cadquery as Cq
from dataclasses import dataclass, field
from typing import Tuple, Optional, Union
from nhf.build import Model, TargetKind, target
import nhf.utils

def box_with_centre_holes(
        length: float,
        width: float,
        height: float,
        hole_loc: list[float],
        hole_diam: float = 6.0,
        ) -> Cq.Workplane:
    """
    Creates a box with holes along the X axis, marked `conn0, conn1, ...`. The
    box's y axis is centred
    """
    result = (
        Cq.Workplane('XY')
        .box(length, width, height, centered=(False, True, False))
        .faces(">Z")
        .workplane()
    )
    plane = result
    for i, x in enumerate(hole_loc):
        result = result.moveTo(x, 0).hole(hole_diam)
        plane.moveTo(x, 0).tagPlane(f"conn{i}")
    return result

@dataclass
class Hole:
    x: float
    y: float = 0.0
    diam: Optional[float] = None
    tag: Optional[str] = None

@dataclass
class MountingBox(Model):
    """
    Create a box with marked holes
    """
    length: float = 100.0
    width: float = 60.0
    thickness: float = 1.0

    # List of (x, y), diam
    holes: list[Hole] = field(default_factory=lambda: [])
    hole_diam: Optional[float] = None

    centred: Tuple[bool, bool] = (False, True)

    generate_side_tags: bool = True

    # Determines the position of side tags
    flip_y: bool = False

    @target(kind=TargetKind.DXF)
    def profile(self) -> Cq.Sketch:
        bx, by = 0, 0
        if not self.centred[0]:
            bx = self.length / 2
        if not self.centred[1]:
            by = self.width / 2
        result = (
            Cq.Sketch()
            .push([(bx, by)])
            .rect(self.length, self.width)
        )
        for hole in self.holes:
            diam = hole.diam if hole.diam else self.hole_diam
            result.push([(hole.x, hole.y)]).circle(diam / 2, mode='s')
        return result

    def generate(self) -> Cq.Workplane:
        """
        Creates box shape with markers
        """
        result = (
            Cq.Workplane('XY')
            .placeSketch(self.profile())
            .extrude(self.thickness)
        )
        plane = result.copyWorkplane(Cq.Workplane('XY')).workplane(offset=self.thickness)
        for i, hole in enumerate(self.holes):
            tag = hole.tag if hole.tag else f"conn{i}"
            plane.moveTo(hole.x, hole.y).tagPlane(tag)

        if self.generate_side_tags:
            result.faces("<Y").workplane(origin=result.vertices("<X and <Y and >Z").val().Center()).tagPlane("left")
            result.faces(">Y").workplane(origin=result.vertices("<X and >Y and >Z").val().Center()).tagPlane("right")

            c_y = ">Y" if self.flip_y else "<Y"
            result.faces("<X").workplane(origin=result.vertices(f"<X and {c_y} and >Z").val().Center()).tagPlane("bot")
            result.faces(">X").workplane(origin=result.vertices(f">X and {c_y} and >Z").val().Center()).tagPlane("top")
            result.faces(">Z").tag("dir")
        return result

    def marked_assembly(self) -> Cq.Assembly:
        result = (
            Cq.Assembly()
            .add(self.generate(), name="box")
        )
        for i in range(len(self.holes)):
            result.markPlane(f"box?conn{i}")
        if self.generate_side_tags:
            (
                result
                .markPlane("box?left")
                .markPlane("box?right")
                .markPlane("box?dir")
                .markPlane("box?top")
                .markPlane("box?bot")
            )
        return result.solve()