tweak the fit of the parts

2026-08-04 12:27:31 -07:00
parent 45a77885f9
commit 69d9b956e6
41 changed files with 5378 additions and 324 deletions
@@ -0,0 +1,31 @@
+# Attitude no battery
+
+Generated by the Feather Case Wizard.
+
+- Top profile: `generic`
+- FeatherWings: 1
+- Battery compartment: no
+- 1/4-20 insert: yes
+- Approximate exterior: 60.8 × 41.7 × 33.2 mm
+- Formats: 3mf
+- Parts: `body`, `lid`, `lid_base`, `lid_accent`
+- Custom cutouts: 0
+
+Run `ruby build.rb` in this directory to regenerate exports and previews.
+OpenSCAD, Blender, and Python 3 must be installed. Set `OPENSCAD`,
+`BLENDER`, or `PYTHON` to override their executable paths.
+
+To open the saved Customizer values manually:
+
+```bash
+openscad -p parameters.json -P attitude-no-battery source/feather_case.scad
+```
+
+The 3MF files contain portable geometry only. Choose printer, filament,
+plate, and slicing settings in Bambu Studio.
+
+For a two-color lid, open `exports/3mf/lid_multicolor.3mf` as one
+multipart object. Assign “Lid base — Filament 1” and “Accent inlays —
+Filament 2” to the desired filaments. `lid.3mf` is the complete
+single-color fallback; `lid_base.3mf` and `lid_accent.3mf` are also
+provided separately.
@@ -0,0 +1,148 @@
+#!/usr/bin/env ruby
+# frozen_string_literal: true
+
+require "fileutils"
+require "json"
+require "open3"
+require "pathname"
+require "tmpdir"
+require "yaml"
+
+ROOT = Pathname(__dir__).expand_path
+
+def executable(env_name, command)
+  override = ENV[env_name]
+  return File.expand_path(override) if override && File.executable?(override)
+
+  ENV.fetch("PATH", "").split(File::PATH_SEPARATOR).each do |directory|
+    candidate = File.join(directory, command)
+    return candidate if File.file?(candidate) && File.executable?(candidate)
+  end
+  nil
+end
+
+def literal(value)
+  case value
+  when String then JSON.generate(value)
+  when TrueClass then "true"
+  when FalseClass then "false"
+  when Numeric then value.to_s
+  when Array then "[#{value.map { |item| literal(item) }.join(",")}]"
+  else raise "Cannot convert #{value.inspect} to OpenSCAD"
+  end
+end
+
+def run!(*command, env: {})
+  stdout, stderr, status = Open3.capture3(env, *command)
+  return if status.success?
+
+  warn [stdout, stderr].reject(&:empty?).join("\n")
+  raise "Command failed (#{status.exitstatus}): #{command.first}"
+end
+
+config = YAML.safe_load_file(ROOT.join("case.yml"), permitted_classes: [],
+                             permitted_symbols: [], aliases: false)
+openscad = executable("OPENSCAD", "openscad")
+blender = executable("BLENDER", "blender")
+python = executable("PYTHON", "python3")
+abort "OpenSCAD not found; install it or set OPENSCAD" unless openscad
+abort "Blender not found; install it or set BLENDER" unless blender
+
+parameters = config.fetch("parameters").merge(
+  "extra_cutouts" => config.fetch("resolved").fetch("extra_cutouts")
+)
+artwork = !parameters.fetch("lid_label", "").empty? ||
+          parameters.fetch("lid_logo_enabled", false)
+abort "Python 3 not found; install it or set PYTHON" if artwork && !python
+parts = %w[body lid] + config.fetch("outputs").fetch("coupons")
+parts.concat(%w[lid_base lid_accent]) if artwork
+buttons = %w[button_a button_b button_c button_reset]
+if parameters["top_profile"] == "oled128x64" &&
+   buttons.any? { |name| parameters[name] }
+  parts << "buttons"
+end
+
+stage = Pathname(Dir.mktmpdir(".rebuild-", ROOT.to_s))
+begin
+  exports = stage.join("exports")
+  previews = stage.join("previews")
+  scratch = stage.join("meshes")
+  FileUtils.mkdir_p([exports, previews, scratch])
+  model = ROOT.join("source/feather_case.scad")
+  renderer = ROOT.join("source/render_stl_previews.py")
+
+  export = lambda do |output, part, overrides = {}|
+    values = parameters.merge(overrides).merge("part" => part)
+    command = [openscad, "-o", output.to_s]
+    values.each { |name, value| command.concat(["-D", "#{name}=#{literal(value)}"]) }
+    run!(*command, model.to_s)
+  end
+
+  config.fetch("outputs").fetch("formats").each do |format|
+    directory = exports.join(format)
+    FileUtils.mkdir_p(directory)
+    parts.each do |part|
+      puts "Exporting #{part}.#{format}…"
+      export.call(directory.join("#{part}.#{format}"), part)
+    end
+    if artwork && format == "3mf"
+      puts "Packaging lid_multicolor.3mf…"
+      run!(
+        python, ROOT.join("tools/package_multimaterial_3mf.py").to_s,
+        directory.join("lid_base.3mf").to_s,
+        directory.join("lid_accent.3mf").to_s,
+        directory.join("lid_multicolor.3mf").to_s,
+        "--title", "#{config.fetch("name")} Lid"
+      )
+    end
+  end
+
+  assembly = scratch.join("assembly.stl")
+  puts "Preparing assembly preview…"
+  export.call(assembly, "assembly",
+              "exploded_view" => config.fetch("outputs").fetch("assembly_exploded_view"),
+              "show_references" => false)
+  render_env = {"DISPLAY" => nil, "WAYLAND_DISPLAY" => nil}
+  run!(blender, "--background", "-noaudio", "--python", renderer.to_s, "--",
+       assembly.to_s, previews.to_s, "assembly", env: render_env)
+  parts.each do |part|
+    puts "Rendering #{part} preview…"
+    mesh = scratch.join("#{part}.stl")
+    export.call(mesh, part) unless mesh.file?
+    run!(blender, "--background", "-noaudio", "--python", renderer.to_s, "--",
+         mesh.to_s, previews.to_s, part, "iso", env: render_env)
+  end
+  if artwork
+    puts "Rendering multicolor lid preview…"
+    run!(
+      blender, "--background", "-noaudio", "--python",
+      ROOT.join("source/render_multicolor_lid.py").to_s, "--",
+      scratch.join("lid_base.stl").to_s,
+      scratch.join("lid_accent.stl").to_s,
+      previews.to_s, "lid_multicolor", parameters["lid_art_orientation"], env: render_env
+    )
+  end
+
+  backup = ROOT.join(".build-old-#{Process.pid}")
+  FileUtils.mkdir_p(backup)
+  %w[exports previews].each do |name|
+    current = ROOT.join(name)
+    FileUtils.mv(current, backup.join(name)) if current.exist?
+  end
+  begin
+    FileUtils.mv(exports, ROOT.join("exports"))
+    FileUtils.mv(previews, ROOT.join("previews"))
+    FileUtils.rm_rf(backup)
+  rescue StandardError
+    FileUtils.rm_rf(ROOT.join("exports"))
+    FileUtils.rm_rf(ROOT.join("previews"))
+    %w[exports previews].each do |name|
+      saved = backup.join(name)
+      FileUtils.mv(saved, ROOT.join(name)) if saved.exist?
+    end
+    raise
+  end
+  puts "Rebuilt #{ROOT}"
+ensure
+  FileUtils.rm_rf(stage)
+end
@@ -0,0 +1,94 @@
+---
+schema_version: 1
+name: Attitude no battery
+slug: attitude-no-battery
+generator:
+  sha256: daeb9015a2bd04a16a75b77b32ee84bca2a9e2a4f4fe16605f3d5dc7e6d53036
+  created_with: feather-case-wizard
+parameters:
+  top_profile: generic
+  wing_count: 1
+  wing_pitch: 11.0
+  stack_height_override: 0.0
+  generic_component_height: 3.0
+  generic_top_gap: 2.0
+  gps_antenna_height: 4.0
+  gps_top_gap: 5.0
+  oled_component_height: 2.4
+  oled_face_gap: 0.8
+  button_a: true
+  button_b: true
+  button_c: true
+  button_reset: false
+  button_projection: 1.5
+  button_cap_size:
+  - 5.0
+  - 3.2
+  button_flange_size:
+  - 6.6
+  - 3.6
+  button_flange_thickness: 0.9
+  button_travel: 0.5
+  button_contact_extension: 0.7
+  battery_enabled: false
+  battery_length: 69.0
+  battery_diameter: 18.0
+  battery_radial_clearance: 0.6
+  battery_end_clearance: 1.0
+  battery_partition_thickness: 1.8
+  rocker_cutout_size:
+  - 12.9
+  - 19.4
+  rocker_corner_radius: 0.8
+  rocker_body_size:
+  - 15.0
+  - 21.0
+  - 21.0
+  rocker_artwork_gap: 2.0
+  tripod_insert_enabled: true
+  tripod_insert_length: 5.0
+  tripod_insert_hole_diameter: 7.2
+  tripod_insert_outer_diameter: 8.0
+  tripod_thread_clearance_diameter: 6.8
+  tripod_boss_diameter: 14.0
+  m25_insert_length: 4.0
+  m25_insert_hole_diameter: 3.1
+  m25_insert_outer_diameter: 3.5
+  m25_screw_clearance: 2.8
+  m25_boss_diameter: 7.0
+  insert_entry_chamfer: 0.6
+  insert_melt_relief: 0.8
+  wall_thickness: 2.4
+  floor_thickness: 2.4
+  lid_thickness: 3.2
+  corner_radius: 4.0
+  board_bottom_clearance: 5.4
+  board_side_clearance: 7.0
+  board_rear_clearance: 4.0
+  usb_board_wall_gap: 1.2
+  lid_lip_depth: 2.4
+  lid_lip_thickness: 1.2
+  fit_clearance: 0.35
+  hole_compensation: 0.2
+  lid_screw_head_diameter: 5.2
+  lid_screw_head_height: 2.5
+  lid_label: IMU
+  lid_logo_enabled: true
+  lid_art_orientation: usb_front
+  lid_inlay_depth: 0.6
+  lid_inlay_fit_clearance: 0.08
+  lid_label_size: 5.0
+  lid_label_logo_gap: 2.0
+  lid_art_margin: 8.5
+  usb_opening_width: 12.5
+  usb_opening_height: 7.0
+  usb_opening_radius: 1.5
+  usb_vertical_offset: 0.0
+cutouts: []
+outputs:
+  formats:
+  - 3mf
+  coupons: []
+  assembly_exploded_view: 8
+resolved:
+  extra_cutouts: []
@@ -0,0 +1,76 @@
+{
+  "parameterSets": {
+    "attitude-no-battery": {
+      "top_profile": "\"generic\"",
+      "wing_count": "1",
+      "wing_pitch": "11.0",
+      "stack_height_override": "0.0",
+      "generic_component_height": "3.0",
+      "generic_top_gap": "2.0",
+      "gps_antenna_height": "4.0",
+      "gps_top_gap": "5.0",
+      "oled_component_height": "2.4",
+      "oled_face_gap": "0.8",
+      "button_a": "true",
+      "button_b": "true",
+      "button_c": "true",
+      "button_reset": "false",
+      "button_projection": "1.5",
+      "button_cap_size": "[5.0,3.2]",
+      "button_flange_size": "[6.6,3.6]",
+      "button_flange_thickness": "0.9",
+      "button_travel": "0.5",
+      "button_contact_extension": "0.7",
+      "battery_enabled": "false",
+      "battery_length": "69.0",
+      "battery_diameter": "18.0",
+      "battery_radial_clearance": "0.6",
+      "battery_end_clearance": "1.0",
+      "battery_partition_thickness": "1.8",
+      "rocker_cutout_size": "[12.9,19.4]",
+      "rocker_corner_radius": "0.8",
+      "rocker_body_size": "[15.0,21.0,21.0]",
+      "rocker_artwork_gap": "2.0",
+      "tripod_insert_enabled": "true",
+      "tripod_insert_length": "5.0",
+      "tripod_insert_hole_diameter": "7.2",
+      "tripod_insert_outer_diameter": "8.0",
+      "tripod_thread_clearance_diameter": "6.8",
+      "tripod_boss_diameter": "14.0",
+      "m25_insert_length": "4.0",
+      "m25_insert_hole_diameter": "3.1",
+      "m25_insert_outer_diameter": "3.5",
+      "m25_screw_clearance": "2.8",
+      "m25_boss_diameter": "7.0",
+      "insert_entry_chamfer": "0.6",
+      "insert_melt_relief": "0.8",
+      "wall_thickness": "2.4",
+      "floor_thickness": "2.4",
+      "lid_thickness": "3.2",
+      "corner_radius": "4.0",
+      "board_bottom_clearance": "5.4",
+      "board_side_clearance": "7.0",
+      "board_rear_clearance": "4.0",
+      "usb_board_wall_gap": "1.2",
+      "lid_lip_depth": "2.4",
+      "lid_lip_thickness": "1.2",
+      "fit_clearance": "0.35",
+      "hole_compensation": "0.2",
+      "lid_screw_head_diameter": "5.2",
+      "lid_screw_head_height": "2.5",
+      "lid_label": "\"IMU\"",
+      "lid_logo_enabled": "true",
+      "lid_art_orientation": "\"usb_front\"",
+      "lid_inlay_depth": "0.6",
+      "lid_inlay_fit_clearance": "0.08",
+      "lid_label_size": "5.0",
+      "lid_label_logo_gap": "2.0",
+      "lid_art_margin": "8.5",
+      "usb_opening_width": "12.5",
+      "usb_opening_height": "7.0",
+      "usb_opening_radius": "1.5",
+      "usb_vertical_offset": "0.0"
+    }
+  },
+  "fileFormatVersion": "1"
+}
@@ -0,0 +1,82 @@
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@@ -0,0 +1,101 @@
+"""Render aligned lid-base and accent STLs with distinct materials."""
+
+import os
+import sys
+import math
+
+import bpy
+from mathutils import Matrix, Vector
+
+
+def import_mesh(path, name, color):
+    bpy.ops.wm.stl_import(filepath=os.path.abspath(path))
+    model = bpy.context.selected_objects[0]
+    model.name = name
+    material = bpy.data.materials.new(f"{name} material")
+    material.diffuse_color = color
+    material.metallic = 0.0
+    material.roughness = 0.45
+    model.data.materials.append(material)
+    return model
+
+
+def look_at(camera, target):
+    direction = Vector(target) - camera.location
+    camera.rotation_euler = direction.to_track_quat("-Z", "Y").to_euler()
+
+
+def main():
+    args = sys.argv[sys.argv.index("--") + 1 :]
+    if len(args) not in (4, 5):
+        raise SystemExit(
+            "expected: lid-base.stl lid-accent.stl output-directory basename [orientation]"
+        )
+    base_path, accent_path, output_dir, basename = args[:4]
+    orientation = args[4] if len(args) == 5 else "usb_left"
+    angles = {"usb_left": 0, "usb_front": 90, "usb_right": 180, "usb_rear": 270}
+    if orientation not in angles:
+        raise SystemExit(f"unknown lid orientation: {orientation}")
+    os.makedirs(output_dir, exist_ok=True)
+    bpy.ops.wm.read_factory_settings(use_empty=True)
+    models = [
+        import_mesh(base_path, "Lid base", (0.16, 0.42, 0.72, 1.0)),
+        import_mesh(accent_path, "Accent inlays", (0.95, 0.42, 0.08, 1.0)),
+    ]
+    # Lid exports are print-oriented with the decorated exterior face down.
+    # Turn both aligned parts over and present the configured USB edge in its
+    # named position so previews inspect the finished face as the user will.
+    for model in models:
+        model.matrix_world = (
+            Matrix.Rotation(math.radians(angles[orientation]), 4, "Z")
+            @ Matrix.Rotation(math.pi, 4, "X")
+        )
+    bpy.context.view_layer.update()
+
+    corners = [obj.matrix_world @ Vector(corner) for obj in models for corner in obj.bound_box]
+    mins = Vector([min(v[i] for v in corners) for i in range(3)])
+    maxs = Vector([max(v[i] for v in corners) for i in range(3)])
+    center = (mins + maxs) / 2
+    span = max(maxs - mins)
+
+    world = bpy.data.worlds.new("Inspection world")
+    world.use_nodes = True
+    world.node_tree.nodes["Background"].inputs["Color"].default_value = (0.035, 0.04, 0.05, 1)
+    world.node_tree.nodes["Background"].inputs["Strength"].default_value = 0.5
+    bpy.context.scene.world = world
+
+    camera_data = bpy.data.cameras.new("Camera")
+    camera = bpy.data.objects.new("Camera", camera_data)
+    bpy.context.collection.objects.link(camera)
+    bpy.context.scene.camera = camera
+    camera.data.type = "ORTHO"
+    camera.data.ortho_scale = span * 1.35
+
+    key_data = bpy.data.lights.new("Key", type="AREA")
+    key_data.energy = 900
+    key_data.size = span
+    key = bpy.data.objects.new("Key", key_data)
+    key.location = center + Vector((span, -span, span * 1.5))
+    bpy.context.collection.objects.link(key)
+
+    scene = bpy.context.scene
+    scene.render.engine = "BLENDER_WORKBENCH"
+    scene.render.resolution_x = 800
+    scene.render.resolution_y = 600
+    scene.render.resolution_percentage = 100
+    scene.render.image_settings.file_format = "PNG"
+    scene.display.shading.light = "STUDIO"
+    scene.display.shading.color_type = "MATERIAL"
+    scene.display.shading.show_shadows = True
+    scene.display.shading.show_cavity = True
+    scene.display.shading.cavity_type = "BOTH"
+
+    for view, direction in {"iso": (1, -1, 0.8), "top": (0, 0, 1)}.items():
+        camera.location = center + Vector(direction).normalized() * span * 2.2
+        look_at(camera, center)
+        scene.render.filepath = os.path.join(output_dir, f"{basename}_{view}.png")
+        bpy.ops.render.render(write_still=True)
+
+
+if __name__ == "__main__":
+    main()
@@ -0,0 +1,127 @@
+"""Render six inspection views of an STL using Blender.
+
+Usage:
+    blender --background --python tools/render_stl_previews.py -- \
+        input.stl output-directory basename [comma-separated-views]
+"""
+
+import os
+import sys
+
+import bpy
+from mathutils import Vector
+
+
+def arguments():
+    args = sys.argv[sys.argv.index("--") + 1 :]
+    if len(args) not in (3, 4):
+        raise SystemExit(
+            "expected: input.stl output-directory basename [comma-separated-views]"
+        )
+    requested_views = args[3].split(",") if len(args) == 4 else None
+    return args[0], args[1], args[2], requested_views
+
+
+def look_at(camera, target):
+    direction = Vector(target) - camera.location
+    camera.rotation_euler = direction.to_track_quat("-Z", "Y").to_euler()
+
+
+def render_view(camera, center, span, name, direction, output_dir, basename):
+    distance = span * 2.2
+    camera.location = Vector(center) + Vector(direction).normalized() * distance
+    look_at(camera, center)
+    camera.data.type = "ORTHO"
+    camera.data.ortho_scale = span * 1.35
+    bpy.context.scene.render.filepath = os.path.join(
+        output_dir, f"{basename}_{name}.png"
+    )
+    bpy.ops.render.render(write_still=True)
+
+
+def main():
+    input_path, output_dir, basename, requested_views = arguments()
+    os.makedirs(output_dir, exist_ok=True)
+
+    bpy.ops.wm.read_factory_settings(use_empty=True)
+    bpy.ops.wm.stl_import(filepath=os.path.abspath(input_path))
+    model = bpy.context.selected_objects[0]
+    model.name = "Feather case"
+
+    material = bpy.data.materials.new("Case material")
+    material.diffuse_color = (0.16, 0.42, 0.72, 1.0)
+    material.metallic = 0.0
+    material.roughness = 0.45
+    model.data.materials.append(material)
+
+    corners = [model.matrix_world @ Vector(corner) for corner in model.bound_box]
+    mins = Vector([min(v[i] for v in corners) for i in range(3)])
+    maxs = Vector([max(v[i] for v in corners) for i in range(3)])
+    center = (mins + maxs) / 2
+    span = max(maxs - mins)
+
+    world = bpy.data.worlds.new("Inspection world")
+    world.use_nodes = True
+    world.node_tree.nodes["Background"].inputs["Color"].default_value = (
+        0.035,
+        0.04,
+        0.05,
+        1,
+    )
+    world.node_tree.nodes["Background"].inputs["Strength"].default_value = 0.5
+    bpy.context.scene.world = world
+
+    camera_data = bpy.data.cameras.new("Camera")
+    camera = bpy.data.objects.new("Camera", camera_data)
+    bpy.context.collection.objects.link(camera)
+    bpy.context.scene.camera = camera
+
+    key_data = bpy.data.lights.new("Key", type="AREA")
+    key_data.energy = 900
+    key_data.shape = "DISK"
+    key_data.size = span
+    key = bpy.data.objects.new("Key", key_data)
+    key.location = center + Vector((span, -span, span * 1.5))
+    bpy.context.collection.objects.link(key)
+
+    fill_data = bpy.data.lights.new("Fill", type="AREA")
+    fill_data.energy = 500
+    fill_data.size = span
+    fill = bpy.data.objects.new("Fill", fill_data)
+    fill.location = center + Vector((-span, span, span))
+    bpy.context.collection.objects.link(fill)
+
+    scene = bpy.context.scene
+    scene.render.engine = "BLENDER_WORKBENCH"
+    scene.render.resolution_x = 800
+    scene.render.resolution_y = 600
+    scene.render.resolution_percentage = 100
+    scene.render.image_settings.file_format = "PNG"
+    scene.render.film_transparent = False
+    scene.display.shading.light = "STUDIO"
+    scene.display.shading.color_type = "MATERIAL"
+    scene.display.shading.show_shadows = True
+    scene.display.shading.show_cavity = True
+    scene.display.shading.cavity_type = "BOTH"
+    scene.display.shading.curvature_ridge_factor = 1.5
+    scene.display.shading.curvature_valley_factor = 1.2
+
+    views = {
+        "iso": (1, -1, 0.8),
+        "front": (-1, 0, 0),
+        "back": (1, 0, 0),
+        "left": (0, -1, 0),
+        "right": (0, 1, 0),
+        "top": (0, 0, 1),
+    }
+    selected = requested_views or list(views)
+    unknown = sorted(set(selected) - set(views))
+    if unknown:
+        raise SystemExit(f"unknown views: {', '.join(unknown)}")
+    for name in selected:
+        direction = views[name]
+        render_view(camera, center, span, name, direction, output_dir, basename)
+
+
+if __name__ == "__main__":
+    main()
@@ -0,0 +1,138 @@
+#!/usr/bin/env python3
+"""Combine aligned lid meshes into one slicer-friendly multipart 3MF."""
+
+from __future__ import annotations
+
+import argparse
+import copy
+import zipfile
+from pathlib import Path
+from xml.etree import ElementTree as ET
+
+
+CORE = "http://schemas.microsoft.com/3dmanufacturing/core/2015/02"
+ET.register_namespace("", CORE)
+
+CONTENT_TYPES_XML = b'''<?xml version="1.0" encoding="UTF-8"?>
+<Types xmlns="http://schemas.openxmlformats.org/package/2006/content-types">
+  <Default Extension="rels" ContentType="application/vnd.openxmlformats-package.relationships+xml"/>
+  <Default Extension="model" ContentType="application/vnd.ms-package.3dmanufacturing-3dmodel+xml"/>
+</Types>
+'''
+
+RELATIONSHIPS_XML = b'''<?xml version="1.0" encoding="UTF-8"?>
+<Relationships xmlns="http://schemas.openxmlformats.org/package/2006/relationships">
+  <Relationship Target="/3D/3dmodel.model" Id="rel0" Type="http://schemas.microsoft.com/3dmanufacturing/2013/01/3dmodel"/>
+</Relationships>
+'''
+
+
+def load_mesh(path: Path) -> ET.Element:
+    with zipfile.ZipFile(path) as archive:
+        root = ET.fromstring(archive.read("3D/3dmodel.model"))
+    mesh = root.find(f".//{{{CORE}}}mesh")
+    if mesh is None:
+        raise ValueError(f"{path} does not contain a 3MF mesh")
+    return copy.deepcopy(mesh)
+
+
+def model_xml(base: Path, accent: Path, title: str) -> bytes:
+    root = ET.Element(
+        f"{{{CORE}}}model",
+        {
+            "unit": "millimeter",
+            "{http://www.w3.org/XML/1998/namespace}lang": "en-US",
+        },
+    )
+    ET.SubElement(root, f"{{{CORE}}}metadata", {"name": "Title"}).text = title
+    ET.SubElement(root, f"{{{CORE}}}metadata", {"name": "Generator"}).text = (
+        "feather-case-wizard"
+    )
+    resources = ET.SubElement(root, f"{{{CORE}}}resources")
+    materials = ET.SubElement(resources, f"{{{CORE}}}basematerials", {"id": "1"})
+    ET.SubElement(
+        materials, f"{{{CORE}}}base", {"name": "Lid base", "displaycolor": "#D1D5DB"}
+    )
+    ET.SubElement(
+        materials,
+        f"{{{CORE}}}base",
+        {"name": "Accent inlays", "displaycolor": "#F97316"},
+    )
+
+    for object_id, name, source in (
+        (2, "Lid base — Filament 1", base),
+        (3, "Accent inlays — Filament 2", accent),
+    ):
+        obj = ET.SubElement(
+            resources,
+            f"{{{CORE}}}object",
+            {
+                "id": str(object_id),
+                "name": name,
+                "type": "model",
+                "pid": "1",
+                "pindex": str(object_id - 2),
+            },
+        )
+        obj.append(load_mesh(source))
+
+    assembly = ET.SubElement(
+        resources, f"{{{CORE}}}object", {"id": "4", "name": title, "type": "model"}
+    )
+    components = ET.SubElement(assembly, f"{{{CORE}}}components")
+    ET.SubElement(components, f"{{{CORE}}}component", {"objectid": "2"})
+    ET.SubElement(components, f"{{{CORE}}}component", {"objectid": "3"})
+    build = ET.SubElement(root, f"{{{CORE}}}build")
+    ET.SubElement(build, f"{{{CORE}}}item", {"objectid": "4"})
+    return ET.tostring(root, encoding="utf-8", xml_declaration=True)
+
+
+def bambu_model_settings_xml(title: str) -> bytes:
+    root = ET.Element("config")
+    obj = ET.SubElement(root, "object", {"id": "4"})
+    ET.SubElement(obj, "metadata", {"key": "name", "value": title})
+    for part_id, name, extruder in (
+        (2, "Lid base — Filament 1", 1),
+        (3, "Accent inlays — Filament 2", 2),
+    ):
+        part = ET.SubElement(obj, "part", {"id": str(part_id), "subtype": "normal_part"})
+        ET.SubElement(part, "metadata", {"key": "name", "value": name})
+        ET.SubElement(part, "metadata", {"key": "extruder", "value": str(extruder)})
+    ET.SubElement(root, "assemble")
+    return ET.tostring(root, encoding="utf-8", xml_declaration=True)
+
+
+def write_entry(archive: zipfile.ZipFile, name: str, data: bytes) -> None:
+    info = zipfile.ZipInfo(name)
+    info.create_system = 3
+    info.external_attr = 0o100644 << 16
+    info.compress_type = zipfile.ZIP_DEFLATED
+    archive.writestr(info, data)
+
+
+def main() -> None:
+    parser = argparse.ArgumentParser()
+    parser.add_argument("base", type=Path)
+    parser.add_argument("accent", type=Path)
+    parser.add_argument("output", type=Path)
+    parser.add_argument("--title", required=True)
+    args = parser.parse_args()
+
+    args.output.parent.mkdir(parents=True, exist_ok=True)
+    with zipfile.ZipFile(args.output, "w", zipfile.ZIP_DEFLATED) as archive:
+        write_entry(archive, "[Content_Types].xml", CONTENT_TYPES_XML)
+        write_entry(archive, "_rels/.rels", RELATIONSHIPS_XML)
+        write_entry(
+            archive,
+            "3D/3dmodel.model",
+            model_xml(args.base, args.accent, args.title),
+        )
+        write_entry(
+            archive,
+            "Metadata/model_settings.config",
+            bambu_model_settings_xml(args.title),
+        )
+
+
+if __name__ == "__main__":
+    main()