feat: new side-hinge box

boxes/edges.py

@@ -367,6 +367,22 @@ def startwidth(self) -> float:
         return self.settings if self.settings is not None else self.boxes.thickness
 
 
+class NoopEdge(BaseEdge):
+    """
+    Edge which does nothing, not even turn or move.
+    """
+
+    def __init__(self, boxes, margin=0) -> None:
+        super().__init__(boxes, None)
+        self._margin = margin
+
+    def __call__(self, _, **kw):
+        # cancel turn
+        self.corner(-90)
+
+    def margin(self) -> float:
+        return self._margin
+
 #############################################################################
 ####     MountingEdge
 #############################################################################

boxes/generators/agricolainsert.py

@@ -557,7 +557,7 @@ def render_player_box(self, player_box_height, player_box_inner_width):
         bed_edge = Bed2SidesEdge(
             self, bed_inner_length, bed_head_length, bed_foot_height
         )
-        noop_edge = NoopEdge(self)
+        noop_edge = edges.NoopEdge(self)
         self.ctx.save()
         optim_180_x = (
             bed_inner_length + self.thickness + bed_head_length + 2 * self.spacing
@@ -916,16 +916,3 @@ def __call__(self, bed_height, **kw):
             (90, head_corner),
             head_length,
         )
-
-
-class NoopEdge(edges.BaseEdge):
-    """
-    Edge which does nothing, not even turn or move.
-    """
-
-    def __init__(self, boxes) -> None:
-        super().__init__(boxes, None)
-
-    def __call__(self, length, **kw):
-        # cancel turn
-        self.corner(-90)

boxes/generators/sidehingebox.py

@@ -0,0 +1,305 @@
+# Copyright (C) 2024 Guillaume Collic
+#
+#   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/>.
+
+import math
+
+from boxes import *
+
+
+class SideHingeBox(Boxes):
+    """Box, with an hinge that does not protrude from the back of the box, and a latch."""
+
+    description = """
+This box is another take on a hinge box.
+The hinges doesn't protrude from the box, but the sides needs double walls.
+When opened, 2 sides are opening, improving access inside the box.
+An optional latch is included, based on a mechanical switch and a 3D printed button.
+The latch is one-way: the box can be closed freely
+(this side of the button is angled, and totally smooth since it's the printing bed surface),
+but can't be inadvertently opened.
+
+![Bottom view](static/samples/SideHingeBox.jpg)
+"""
+
+    ui_group = "Box"
+
+    def __init__(self) -> None:
+        Boxes.__init__(self)
+        self.buildArgParser("x", "y", "h", "outside")
+        self.addSettingsArgs(edges.FingerJointSettings, finger=2.0, space=2.0)
+
+        self.argparser.add_argument(
+            "--play",  action="store", type=float, default=0.15,
+            help="play between the two sides as multiple of the wall thickness")
+
+        self.argparser.add_argument(
+            "--hinge_center",  action="store", type=float, default=None,
+            help="distance between the hinge center and adjacent sides")
+
+        self.argparser.add_argument(
+            "--hinge_radius",  action="store", type=float, default=5.5,
+            help="radius of the hinge inner circle")
+
+        self.argparser.add_argument(
+            "--cherrymx_latch",  action="store", type=bool, default=False,
+            help="add a latch, based on 3D printing and a cherry mx compatible mechanical keyboard switch")
+
+
+    def render(self):
+        x, yi, hi = self.x, self.y, self.h
+        t = self.thickness
+        p = self.play * t
+        hinge_radius = self.hinge_radius
+        hinge_center = self.hinge_center if self.hinge_center else 2*t + hinge_radius
+        with_latch = self.cherrymx_latch
+        if with_latch and t>3.7:
+            raise "cherrymx_latch not compatible with thickness > 3.7mm"
+        self.mx_width = 15.4
+        self.mx_length = t+16.4+2.8 #2.8 can be removed if the switch is trimmed flush
+
+        if self.outside:
+            x -= 2*t
+            yi -= 4*t + 2*p
+            hi -= 2*t
+
+        yo = yi + 2*(t+p)
+        ho = hi + t
+
+        # one side is shared between inside and outside part,
+        # so that the lid can rotate and lay flat, without touching the inner bottom
+        fingered_hi = 2*hinge_center-t
+        # a small gap is also needed for both part to rotate freely
+        # (for a rounded angled finish, a gapless version could be added, with manual sanding or mechanical round milling)
+        gap = math.sqrt(abs(pow(hinge_center*math.sqrt(2),2)-pow(hinge_center-t,2)))-hinge_center
+        fingered_ho = ho - gap - 2*hinge_center
+
+        with self.saved_context():
+            self.inner_side(x, hi, hinge_center, hinge_radius, fingered_hi, with_latch=with_latch, reverse=True)
+            d_side_callback = [
+                lambda:self.fingerHolesAt(self.mx_length+t/2, 0, self.mx_width),
+            ] if with_latch else None
+            self.rectangularWall(yi, hi, "fFeF", callback=d_side_callback, move="right", label="inner - full side D")
+            self.inner_side(x, hi, hinge_center, hinge_radius, fingered_hi)
+        self.rectangularWall(0, hi, "ffef", move="up only")
+
+        with self.saved_context():
+            self.outer_side(x, ho, hinge_center, hinge_radius, fingered_ho, with_latch=with_latch)
+            with self.saved_context():
+                self.rectangularWall(yo, fingered_ho, "fFeF", move="up", label="outer - small side B")
+                self.moveTo(t+p,0)
+                self.rectangularWall(yi, fingered_hi, "eFfF", move="right", label="inner - small side B")
+            self.rectangularWall(yo, 0, "fFeF", move="right only")
+            self.outer_side(x, ho, hinge_center, hinge_radius, fingered_ho, reverse=True)
+        self.rectangularWall(0, ho, "ffef", move="up only")
+
+        bottom_callback = [
+            lambda:self.fingerHolesAt(x-self.mx_width-t/2, 0, self.mx_length),
+            lambda:self.fingerHolesAt(self.mx_length+t/2, 0, self.mx_width),
+        ] if with_latch else None
+        self.rectangularWall(x, yi, "FFFF", callback=bottom_callback, move="right", label="inner - bottom")
+        self.rectangularWall(x, yo, "FEFF", move="right", label="outer - upper lid")
+        for _ in range(2):
+            self.rectangularWall(2*t, 1.5*t, "eeee", move="right")
+        if with_latch:
+            self.rectangularWall(self.mx_width, self.mx_width, "eeee", move="right")
+            self.rectangularWall(self.mx_width, self.mx_width, "ffef", move="right")
+            self.rectangularWall(self.mx_length, self.mx_width, "ffeF", move="right")
+            self.text(f"""
+OpenSCAD code for 3D printing the cherry MX latch button:
+#############################################
+play = 0.1;
+plywood_t = {t};
+ear_t = 0.4;
+ear_d = 15;
+btn_d = 11.4;
+btn_h = ear_t + plywood_t*2;
+module mx_outer() {{
+  translate([0,0,btn_h+4])
+    mirror([0,0,1])
+    linear_extrude(height = 4.2) {{
+      offset(r=1, $fn=32){{
+        square([4.5, 2.8], center=true);
+      }}
+    }};
+}}
+module mx_inner() {{
+  translate([0,0,btn_h+4.01])
+  mirror([0,0,1])
+  for (rect = [ [4.05, 1.32], [1.22, 5] ]) {{
+    linear_extrude(height = 4)
+      square(rect, center=true);
+    hull() {{
+      linear_extrude(height = 0.01)
+        offset(delta = 0.4)
+        square(rect, center=true);
+      translate([0, 0, 0.5])
+        linear_extrude(height = 0.01)
+        square(rect, center=true);
+    }};
+  }}
+}}
+angle = atan2(plywood_t+0.2, btn_d/2);
+rotate([0, angle, 0]) difference(){{
+  union(){{
+    cylinder(d=btn_d-2*play, h=btn_h, $fn=512);
+    translate([0, 0, ear_t/2+plywood_t*2])
+      cube([btn_d/2, ear_d, ear_t], center=true);
+    mx_outer();
+  }}
+  rotate([0, 90-angle, 0])
+    translate([0, -btn_d/2, 0])
+    cube(btn_d);
+  mx_inner();
+}}""")
+
+
+    def inner_side_cb(self, x):
+        self.fingerHolesAt(x-self.mx_width-self.thickness/2, 0, self.mx_width)
+        self.circle(x-self.mx_width/2, self.mx_width/2, 5.7+self.burn)
+
+    def inner_side(self, x, h, hinge_center, hinge_radius, fingered_h, with_latch=False, reverse=False):
+        sides = Inner2SidesEdge(
+            self, x,  h, hinge_center, hinge_radius, fingered_h, reverse
+        )
+        noop_edge = edges.NoopEdge(self, margin=self.thickness if reverse else 0)
+        self.rectangularWall(
+            x,
+            h,
+            ["f", "f", sides, noop_edge] if reverse else["f", sides, noop_edge, "f"],
+            move="right",
+            label="inner - hinge side " + ("A" if reverse else "C"),
+            callback=[
+                lambda: self.inner_side_cb(x)
+            ] if with_latch and reverse else None,
+        )
+
+    def outer_side(self, x, h, hinge_center, hinge_radius, fingered_h, with_latch=False, reverse=False):
+        t = self.thickness
+        sides = Outer2SidesEdge(
+            self, x,  h, hinge_center, hinge_radius, fingered_h, reverse
+        )
+        noop_edge = edges.NoopEdge(self, margin=t if reverse else 0)
+
+        self.rectangularWall(
+            x,
+            h,
+            ["f", "E", sides, noop_edge] if reverse else["f", sides, noop_edge, "E"],
+            move="right",
+            label="outer - hinge side " + ("C" if reverse else "A"),
+            callback=[
+                None,
+                None,
+                lambda: self.circle(t+self.mx_width/2, self.mx_width/2, 5.7+self.burn)
+            ] if with_latch and not reverse else None,
+        )
+
+class Inner2SidesEdge(edges.BaseEdge):
+    """
+    The next edge should be a NoopEdge
+    """
+
+    def __init__(self, boxes, length, height, hinge_center, hinge_radius, fingered_h, reverse) -> None:
+        super().__init__(boxes, None)
+        self.length = length
+        self.height = height
+        self.hinge_center=hinge_center
+        self.hinge_radius=hinge_radius
+        self.fingered_h=fingered_h
+        self.reverse=reverse
+
+    def __call__(self, _, **kw):
+        actions = [self.hinge_hole, self.fingers, self.smooth_corner]
+        actions = list(reversed(actions)) if self.reverse else actions
+        for action in actions:
+            action()
+
+    def fingers(self):
+        self.boxes.edges['f'](self.fingered_h)
+
+    def smooth_corner(self):
+        # the corner has to be rounded to rotate freely
+        hinge_to_lid = self.height+self.boxes.thickness-self.hinge_center
+        hinge_to_side = self.hinge_center-self.boxes.thickness
+        corner_height = hinge_to_lid-math.sqrt(math.pow(hinge_to_lid, 2) - math.pow(hinge_to_side, 2))
+        angle = math.degrees(math.asin(hinge_to_side/hinge_to_lid))
+        path = [
+            self.height-self.fingered_h-corner_height,
+            (90-angle, 0),
+            0,
+            (angle, hinge_to_lid),
+            self.boxes.thickness+self.length-self.hinge_center,
+        ]
+        path = list(reversed(path)) if self.reverse else path
+        self.polyline(*path)
+
+    def hinge_hole(self):
+        direction = -1 if self.reverse else 1
+        x = direction*(self.hinge_center-self.boxes.thickness-self.boxes.burn)
+        y = self.hinge_center-self.boxes.thickness
+        t = self.boxes.thickness
+        self.boxes.rectangularHole(x, y, 1.5*t, t)
+
+    def margin(self) -> float:
+        return 0 if self.reverse else self.boxes.edges['f'].margin()
+
+class Outer2SidesEdge(edges.BaseEdge):
+    """
+    The next edge should be a NoopEdge
+    """
+
+    def __init__(self, boxes, length, height, hinge_center, hinge_radius, fingered_h, reverse) -> None:
+        super().__init__(boxes, None)
+        self.length = length
+        self.height = height
+        self.hinge_center=hinge_center
+        self.hinge_radius=hinge_radius
+        self.fingered_h=fingered_h
+        self.reverse=reverse
+
+    def __call__(self, _, **kw):
+        actions = [self.fingers, self.smooth_corner, self.hinge_hole]
+        actions = list(reversed(actions)) if self.reverse else actions
+        for action in actions:
+            action()
+
+    def fingers(self):
+        self.boxes.edges['f'](self.fingered_h)
+
+    def smooth_corner(self):
+        # the corner has to be rounded to rotate freely
+        path = [
+            0,
+            (-90, 0),
+            self.boxes.thickness,
+            (90, 0),
+            self.height-self.fingered_h-self.hinge_center,
+            (90, self.hinge_center),
+            self.boxes.thickness+self.length-self.hinge_center,
+        ]
+        path = list(reversed(path)) if self.reverse else path
+        self.polyline(*path)
+
+    @restore
+    @holeCol
+    def hinge_hole(self):
+        direction = -1 if self.reverse else 1
+        x = direction*(self.hinge_center-self.length-self.boxes.thickness-self.boxes.burn)
+        y = self.hinge_center
+        t = self.boxes.thickness
+        self.boxes.circle(x, y, self.hinge_radius)
+        self.boxes.rectangularHole(x, y, t, 1.5*t)
+
+    def margin(self) -> float:
+        return 0 if self.reverse else self.boxes.edges['f'].margin()