New generator: RollHolder

Holder for kitchen, toilet paper or other rolls

boxes/generators/rollholder.py

@@ -0,0 +1,134 @@
+#!/usr/bin/env python3
+# Copyright (C) 2013-2016 Florian Festi
+#
+#   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 RollHolder(Boxes):
+    """Holder for kitchen rolls or other rolls"""
+
+    description = """Needs a dowel or pipe as axle."""
+    
+    ui_group = "Misc"
+    ui_group = "Unstable"
+
+    def __init__(self) -> None:
+        Boxes.__init__(self)
+
+        self.addSettingsArgs(edges.FingerJointSettings)
+        self.argparser.add_argument(
+            "--width",  action="store", type=float, default=275,
+            help="length of the axle in mm")
+        self.argparser.add_argument(
+            "--diameter",  action="store", type=float, default=120,
+            help="maximum diameter of the roll in mm (choose generously)")
+        self.argparser.add_argument(
+            "--height",  action="store", type=float, default=80,
+            help="height of mounting plate in mm")
+        self.argparser.add_argument(
+            "--axle",  action="store", type=float, default=25,
+            help="diameter of the axle in mm including play")
+        self.argparser.add_argument(
+            "--screw_holes",  action="store", type=float, default=4,
+            help="diameter of mounting holes in mm")
+        self.argparser.add_argument(
+            "--one_piece",  action="store", type=boolarg, default=True,
+            help="have a continuous back plate instead of two separate holders")
+
+    def side(self, move=None):
+        d = self.diameter
+        a = self.axle
+        h = self.height
+        t = self.thickness
+
+        tw, th = h, (d + a) / 2 + 4 * t
+
+        if self.move(tw, th, move, True):
+            return
+
+        self.moveTo(0, t)
+        self.edges["f"](h)
+        self.fingerHolesAt(-(a/2+3*t), self.burn, d/2, 90)
+        self.polyline(0, 90, d/2, (90, a/2 + 3*t))
+
+        r = a/2 + 3*t
+        a = math.atan2(float(d/2), (h-a-6*t))
+        alpha = math.degrees(a)
+
+        self.corner(alpha, r)
+        self.edge(((h-2*r)**2+(d/2)**2)**0.5)
+        self.corner(90-alpha, r)
+        self.corner(90)
+        
+        self.move(tw, th, move)
+
+    def backCB(self):
+        t = self.thickness
+        a = self.axle
+        h = self.height
+        w = self.width
+
+        plate = w + 2*t + h/2 if self.one_piece else h/2 + t
+        
+        self.fingerHolesAt(h/4+t/2-3*t, 0, h, 90)
+        self.fingerHolesAt(h/4-3*t, h-3*t-a/2, h/4, 180)
+
+        if self.one_piece:
+            self.fingerHolesAt(h/4+t/2+t-3*t+w, 0, h, 90)
+            self.fingerHolesAt(h/4+2*t-3*t+w, h-3*t-a/2, h/4, 0)
+
+        for x in (0, plate-6*t):
+            for y in (3*t, h-3*t):
+                self.hole(x, y, d=self.screw_holes)
+
+    def rings(self):
+        a = self.axle
+        r = a/2
+        t = self.thickness
+        
+        self.moveTo(0, a+1.5*t, -90)
+        for i in range(2):
+            self.polyline(r-1.5*t, (180, r+3*t), 0, (180, 1.5*t), 0,
+                          (-180, r), r-1.5*t, (180, 1.5*t))
+            self.moveTo(a-t, a+12*t, 180)
+                          
+                      
+    def render(self):
+        t = self.thickness
+        w = self.width
+        d = self.diameter
+        a = self.axle
+        h = self.height
+
+        self.height = h = max(h, a+10*t)
+
+        self.side(move="right")
+        self.side(move="right")
+
+        self.rectangularTriangle(h/4, d/2, "ffe", num=2, r=3*t, move="right")
+
+        if self.one_piece:
+            self.roundedPlate(w+h/2+2*t, h, edge="e", r=3*t,
+                              extend_corners=False,
+                              callback=[self.backCB], move="right")
+        else:
+            self.roundedPlate(h/2+t, h, edge="e", r=3*t,
+                              extend_corners=False,
+                              callback=[self.backCB], move="right")
+            self.roundedPlate(h/2+t, h, edge="e", r=3*t,
+                              extend_corners=False,
+                              callback=[self.backCB], move="right mirror")
+
+        self.rings()