coin bank-safe

boxes/generators/coinbanksafe.py

@@ -0,0 +1,215 @@
+# Copyright (C) 2024 Oliver Jensen
+#
+#   This program is free software: you can redistribute it and/or modify
+#   it under the terms of the GNU General Public License as published by
+#   the Free Software Foundation, either version 3 of the License, or
+#   (at your option) any later version.
+#
+#   This program is distributed in the hope that it will be useful,
+#   but WITHOUT ANY WARRANTY; without even the implied warranty of
+#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#   GNU General Public License for more details.
+#
+#   You should have received a copy of the GNU General Public License
+#   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+from boxes import *
+
+class CoinBankSafe(Boxes):
+    """A piggy-bank designed to look like a safe."""
+
+    description ='''
+When gluing together the dials, you're pretty much guaranteed to get some glue between them and the door.
+Make sure to actuate the dials a couple times while the glue is curing to ensure they can turn at the end.
+
+Make sure not to discard the circle cutouts from the lid, base, and door. They are all needed.
+
+![Open](static/samples/CoinBankSafe-2.jpg)
+'''
+
+    ui_group = "Misc"
+
+    def __init__(self) -> None:
+        Boxes.__init__(self)
+        self.addSettingsArgs(edges.FingerJointSettings)
+        self.buildArgParser("x", "y", "h")
+        self.argparser.add_argument(
+            "--slotlength", action="store", type=float, default=30,
+            help="Length of the coin slot in mm")
+        self.argparser.add_argument(
+            "--slotwidth", action="store", type=float, default=4,
+            help="Width of the coin slot in mm")
+        self.argparser.add_argument(
+            "--handlelength", action="store", type=float, default=8,
+            help="Length of handle in multiples of thickness")
+        self.argparser.add_argument(
+            "--handleclearance", action="store", type=float, default=1.5,
+            help="Clearance of handle in multiples of thickness")
+
+    def circleSquareHole(self, x, y, radius, variant=False):
+        t = self.thickness
+        with self.saved_context():
+            self.rectangularHole(x, y, t, t)
+            if not variant:
+                self.circle(x, y, radius)
+            elif variant == "D":
+                # can't use dhole because it's a part, not a hole
+                # self.dHole(x, y, radius, rel_w=0.80)
+                rel_w = 0.8
+                w = 2.0 * radius * rel_w
+                w -= radius
+                a = math.degrees(math.acos(w / radius))
+                self.moveTo(x, y, -a)
+                self.moveTo(radius, 0, -90)
+                self.corner(-360+2*a, radius)
+                self.corner(-a)
+                self.edge(2*radius*math.sin(math.radians(a)))
+            elif variant == "W":
+                # need to deal with the annoying margin applied to all Parts
+                self.moveTo(-t/2, -t/2) # resolve weird margin thing of parts
+                self.parts.waivyKnob(radius*2)
+
+
+    def render(self):
+        x, y, h = self.x, self.y, self.h
+        t = self.thickness
+
+        slot_length = self.slotlength
+        slot_width = self.slotwidth
+
+        handle_length = self.handlelength * t
+        handle_clearance = self.handleclearance * t
+
+        # lock parameters
+        big_radius = 2.25 * t
+        small_radius = 1.4 * t
+        spacing = 1
+
+        # side walls
+        with self.saved_context():
+            self.rectangularWall(x, h, "seFf", move="mirror right")
+            self.rectangularWall(y, h, "sFFF", move="right")
+
+            # wall with holes for the locking bar
+            # I don't know what that extra 0.3 is doing, this equation was derived experimentally
+            # from measuring the correct distances at t=3 and t=6, and doing a regression.
+            # The distance between the holes and the edge should be equal to t plus the distance
+            # between the bottom of the square in the hinge of the lid.
+            self.fingerHolesAt(x - 1.52*t + 0.3, 4.3*t, h, 90)
+            self.rectangularWall(x, h, "sfFe", ignore_widths=[3,4,7,8], move="mirror right")
+
+            # locking bar
+            with self.saved_context():
+                self.moveTo(0, 4*t)
+                self.rectangularWall(1.5*t, h, "eeef", move="right")
+            self.rectangularWall(1.5*t, h, "eeef", move="right only")
+            # door
+            door_clearance = .25 * t # amount to shave off of the door width so it can open
+            self.moveTo(1, 1+t*4)
+            self.polyline(
+                (y - 2.25*t - door_clearance), -90, t, 90, t, 90, t, -90, 1.25*t, 90,
+                h, 90,
+                1.25*t, -90, t, 90, t, 90, t, -90, (y - 2.25*t - door_clearance), 90,
+                h, 90)
+            num_dials = 3
+            space_under_dials = 6*big_radius
+            space_not_under_dials = h - space_under_dials
+            dial_spacing = space_not_under_dials / (num_dials + 1)
+            if dial_spacing < 1 :
+                min_height = 6*big_radius + 4
+                raise ValueError(f"With thickness {t}, h must be at least {min_height} to fit the dials.")
+
+            self.circleSquareHole(3*t - door_clearance, h/2, 1.25 * t)
+            self.circleSquareHole(3*t - door_clearance, h/2 - (2*big_radius + dial_spacing), 1.25 * t)
+            self.circleSquareHole(3*t - door_clearance, h/2 + (2*big_radius + dial_spacing), 1.25 * t)
+            self.rectangularHole(y/2 - door_clearance, h/2, t, handle_length / 2)
+
+        self.rectangularWall(x, h, "seff", move="up only")
+        self.moveTo(0, t/2)
+
+        # lid
+        with self.saved_context():
+            #self.rectangularWall(y, x, "efff")
+            self.edges["e"](y)
+            self.corner(90)
+            self.edges["f"](x)
+            self.corner(90)
+            self.edges["f"](y)
+            self.corner(90)
+            self.edges["f"](x)
+            self.corner(90)
+
+            self.circleSquareHole(y - 1.75*t, 1.75*t, 1.15*t)
+            self.rectangularHole(y/2, x/2, slot_length, slot_width)
+        self.rectangularWall(y, x, "efff", move="right only")
+
+        # bottom
+        with self.saved_context():
+            #self.rectangularWall(y, x, "efff")
+            #self.moveTo(1, 1)
+            self.edges["e"](y)
+            self.corner(90)
+            self.edges["f"](x)
+            self.corner(90)
+            self.edges["f"](y)
+            self.corner(90)
+            self.edges["f"](x)
+            self.corner(90)
+            self.circleSquareHole(1.75*t, 1.75*t, 1.15*t)
+        self.rectangularWall(y, x, "efff", move="right only")
+
+        # locks
+        with self.saved_context():
+            self.circleSquareHole(big_radius, big_radius, big_radius)
+            self.moveTo(2 * big_radius + spacing, 0)
+            self.circleSquareHole(big_radius, big_radius, big_radius)
+            self.moveTo(2 * big_radius + spacing, 0)
+            self.circleSquareHole(big_radius, big_radius, big_radius)
+            self.moveTo(2 * big_radius + spacing, 0)
+            self.circleSquareHole(big_radius, big_radius, big_radius, "D")
+            self.moveTo(2 * 0.8 * big_radius + spacing, 0)
+            self.circleSquareHole(big_radius, big_radius, big_radius, "D")
+            self.moveTo(2 * 0.8 * big_radius + spacing, 0)
+            self.circleSquareHole(big_radius, big_radius, big_radius, "D")
+            self.moveTo(2 * 0.8 * big_radius + spacing, 0)
+
+            self.circleSquareHole(small_radius, small_radius, small_radius)
+            self.moveTo(2 * small_radius + spacing, 0)
+            self.circleSquareHole(small_radius, small_radius, small_radius)
+            self.moveTo(2 * small_radius + spacing, 0)
+            self.circleSquareHole(small_radius, small_radius, small_radius)
+            self.moveTo(2 * small_radius + spacing, 0)
+            self.circleSquareHole(small_radius, small_radius, small_radius, "W")
+            self.moveTo(2 * small_radius + spacing, 0)
+            self.circleSquareHole(small_radius, small_radius, small_radius, "W")
+            self.moveTo(2 * small_radius + spacing, 0)
+            self.circleSquareHole(small_radius, small_radius, small_radius, "W")
+        self.moveTo(0, 2 * big_radius + spacing)
+
+        # lock pins
+        with self.saved_context():
+            self.rectangularWall(5*t, t, move="up")
+            self.rectangularWall(5*t, t, move="up")
+            self.rectangularWall(5*t, t, move="up")
+        self.rectangularWall(5*t, t, move="right only")
+
+        # handle
+        handle_curve_radius = 0.2 * t
+        self.moveTo(2 * handle_curve_radius,0)
+        self.polyline(
+            handle_length - 2 * handle_curve_radius,
+            (90, handle_curve_radius),
+            handle_clearance - handle_curve_radius,
+            90,
+            handle_length / 4,
+            -90,
+            t,
+            90,
+            handle_length / 2,
+            90,
+            t,
+            -90,
+            handle_length / 4,
+            90,
+            handle_clearance - handle_curve_radius,
+            (90, handle_curve_radius))