New generator: RegularStarBox

Box made from two regular polygon pieces that go together to form a star.

boxes/generators/regularstarbox.py

@@ -0,0 +1,104 @@
+#!/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/>.
+
+from boxes import *
+import copy
+
+class SlotEdge(edges.Edge):
+
+    def __call__(self, length, **kw):
+        t, n = self.settings.thickness, self.settings.n
+        r, h = self.settings.radius, self.settings.h
+        sh = self.settings.sh # distance side to center
+
+        li = 2 * sh * math.tan(math.radians(90/n)) # side inner 2x polygone
+        ls2 = t / math.tan(math.radians(180/n))
+        ls1 = t / math.cos(math.radians(90-(180/n)))
+
+        lo = (length-li-2*ls1)/2
+
+        li = li - 2*ls2 # correct for overlap of wall
+        
+        d = h/2
+        
+        if li > 0:
+            poly = [lo-1, (90, 1), d+t-1, -90, ls1+ls2, -90, d-t, (90, t)]
+        self.polyline(*(poly + [li-2*t] + list(reversed(poly))))
+
+    def startwidth(self):
+        return self.settings.thickness
+
+
+class RegularStarBox(Boxes):
+    """Regular polygon boxes that form a star when closed"""
+
+    ui_group = "Box"
+
+
+    description = """![Open box](static/samples/RegularStarBox-2.jpg)"""
+
+    def __init__(self):
+        Boxes.__init__(self)
+        self.addSettingsArgs(edges.FingerJointSettings)
+        self.buildArgParser("h", "outside")
+        self.argparser.add_argument(
+            "--radius",  action="store", type=float, default=50.0,
+            help="inner radius if the box (center to corners)")
+        self.argparser.add_argument(
+            "--n",  action="store", type=int, default=5,
+            choices=(3, 4, 5),
+            help="number of sides")
+
+    def render(self):
+
+        r, h, n = self.radius, self.h, self.n
+
+        if self.outside:
+            self.r = r = r - self.thickness / math.cos(math.radians(360/(2*n)))
+            self.h = h = self.adjustSize(h)
+
+        t = self.thickness
+
+        fingerJointSettings = copy.deepcopy(self.edges["f"].settings)
+        fingerJointSettings.setValues(self.thickness, angle=360./n)
+        fingerJointSettings.edgeObjects(self, chars="gGH")
+
+        self.edges["e"] = SlotEdge(self, self)
+
+        r, sh, side  = self.regularPolygon(n, radius=r)
+        self.sh = sh
+
+        with self.saved_context():
+            self.regularPolygonWall(corners=n, r=r, edges='F', move="right")
+            self.regularPolygonWall(corners=n, r=r, edges='F', move="right")
+
+        self.regularPolygonWall(corners=n, r=r, edges='F', move="up only")
+
+        for s in range(2):
+            with self.saved_context():
+                if n % 2:
+                    for i in range(n):
+                        self.rectangularWall(side, h, move="right",
+                                             edges="fgeG")
+                else:
+                    for i in range(n//2):
+                        self.rectangularWall(side, h, move="right",
+                                                 edges="fGeG")
+                        self.rectangularWall(side, h, move="right",
+                                             edges="fgeg")
+
+            self.rectangularWall(side, h, move="up only",
+                                 edges="fgeG")

static/samples/samples.sha256

@@ -94,3 +94,5 @@ b843c04a6ec530afaf40c664479c6f1eeadc9d48f1ff7ca99bea3575da733144  ../static/samp
 42aee460ccffbd7487f748e917f9083fb768a7e2b5f3012f57f8f55c20425ea6  ../static/samples/WallPliersHolder.jpg
 1ed8dc40cbbbee9f7782f1b19013f4e60201f6bf0775728da43862d2c95418b5  ../static/samples/Platonic-Icosahedron.jpg
 207089f5546205c6f812cf95036f9700d15bb9b830ded6a4667689f2af311b89  ../static/samples/SlidingDrawer.jpg
+6d7819ccc6851558121b43fca9f3a8dbba632d09091605c97e891ca1e10e51e8  ../static/samples/RegularStarBox.jpg
+7ab0da6aa8aa87e72e803bbdc18653622d9f1fb5dd0fe826dbf085bb338e28f6  ../static/samples/RegularStarBox-2.jpg