New generator: FlexBox5

Resolves #147

boxes/generators/flexbox5.py

@@ -0,0 +1,122 @@
+#!/usr/bin/env python3
+# Copyright (C) 2013-2014 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/>.
+
+import boxes
+import math
+
+
+class FlexBox5(boxes.Boxes):
+    """Box with living hinge and round corners"""
+
+    ui_group = "FlexBox"
+
+    def __init__(self):
+        boxes.Boxes.__init__(self)
+        self.addSettingsArgs(boxes.edges.FingerJointSettings)
+        self.addSettingsArgs(boxes.edges.FlexSettings)
+        self.buildArgParser("x", "h", "outside")
+        self.argparser.add_argument(
+            "--top_diameter", action="store", type=float, default=60,
+            help="diameter at the top")
+        self.argparser.add_argument(
+            "--bottom_diameter", action="store", type=float, default=60,
+            help="diameter at the bottom")
+        self.argparser.add_argument(
+            "--latchsize", action="store", type=float, default=8,
+            help="size of latch in multiples of thickness")
+
+    def flexBoxSide(self, callback=None, move=None):
+        t = self.thickness
+
+        r1, r2 = self.top_diameter/2., self.bottom_diameter/2
+        a = self.a
+        l = self.l
+
+        tw , th = l+r1+r2, 2*max(r1, r2)+2*t
+        
+        if self.move(tw, th, move, True):
+            return
+
+        self.moveTo(r2, t)
+
+        self.cc(callback, 0)
+        self.edges["f"](l)
+        self.corner(180+2*a, r1)
+        self.cc(callback, 1)
+        self.latch(self.latchsize)
+        self.cc(callback, 2)
+        self.edges["f"](l - self.latchsize)
+        self.corner(180-2*a, r2)
+
+        self.move(tw, th, move)
+
+    def surroundingWall(self, move=None):
+        t = self.thickness
+
+        r1, r2 = self.top_diameter/2., self.bottom_diameter/2
+        h = self.h
+        a = self.a
+        l = self.l
+
+
+        c1 = math.radians(180+2*a) * r1
+        c2 = math.radians(180-2*a) * r2
+
+        tw = 2*l + c1 + c2
+        th = h + 2.5*t
+
+        if self.move(tw, th, move, True):
+            return
+
+        self.moveTo(0, 0.25*t)
+
+        self.edges["F"](l - self.latchsize, False)
+        self.edges["X"](c2, h + 2 * t)
+        self.edges["F"](l, False)
+        self.edges["X"](c1, h + 2 * t)
+        self.latch(self.latchsize, False)
+        self.edge(h + 2 * t)
+        self.latch(self.latchsize, False, True)
+        self.edge(c1)
+        self.edges["F"](l, False)
+        self.edge(c2)
+        self.edges["F"](l - self.latchsize, False)
+        self.corner(90)
+        self.edge(h + 2 * t)
+        self.corner(90)
+
+        self.move(tw, th, move)
+
+    def render(self):
+
+        if self.outside:
+            self.x = self.adjustSize(self.x)
+            self.h = self.adjustSize(self.h)
+            self.top_diameter = self.adjustSize(self.top_diameter)
+            self.bottom_diameter = self.adjustSize(self.bottom_diameter)
+            
+        t = self.thickness
+        self.latchsize *= self.thickness
+        d_t, d_b = self.top_diameter, self.bottom_diameter
+        self.x = max(self.x, self.latchsize + 2*t + (d_t + d_b)/2)
+
+        d_c = self.x - d_t/2. - d_b/2.
+        self.a = math.degrees(math.asin((d_t-d_b)/2 / d_c))
+        self.l = d_c * math.cos(math.radians(self.a))
+
+        self.surroundingWall(move="up")
+        self.flexBoxSide(move="right")
+        self.flexBoxSide(move="mirror")