BirdHouse: Add overhang parameter

to allow making the roof bigger and better looking.
Declare stable by moving to "Misc"

Resolves: #414

boxes/generators/birdhouse.py

@@ -19,15 +19,16 @@ from boxes import *
 class BirdHouse(Boxes):
     """Simple Bird House"""
 
-    ui_group = "Unstable" # "Misc"
+    ui_group = "Misc"
 
     def __init__(self) -> None:
         Boxes.__init__(self)
 
         self.addSettingsArgs(edges.FingerJointSettings, finger=10.0,space=10.0)
-
-        # remove cli params you do not need
         self.buildArgParser(x=200, y=200, h=200)
+        self.argparser.add_argument(
+            "--roof_overhang",  action="store", type=float, default=0.4,
+            help="overhang as fraction of the roof length")
 
     def side(self, x, h, edges="hfeffef", callback=None, move=None):
         angles = (90, 0, 45, 90, 45, 0, 90)
@@ -52,6 +53,30 @@ class BirdHouse(Boxes):
         
         self.move(tw, th, move)
 
+    def roof(self, x, h, overhang, edges="eefe", move=None):
+        t = self.thickness
+        edges = [self.edges.get(e, e) for e in edges]
+
+        tw = x + 2*t + 2*overhang + edges[1].spacing() + edges[3].spacing()
+        th = h + 2*t + overhang + edges[0].spacing() + edges[2].spacing()
+
+        if self.move(tw, th, move, True):
+            return
+
+        self.moveTo(overhang + edges[3].spacing(), edges[0].margin())
+        edges[0](x + 2*t)
+        self.corner(90, overhang)
+        edges[1](h + 2*t)
+        self.edgeCorner(edges[1], edges[2])
+        self.fingerHolesAt(overhang + 0.5*t, edges[2].startwidth(), h, 90)
+        self.fingerHolesAt(x + overhang + 1.5*t, edges[2].startwidth(), h, 90)
+        edges[2](x + 2*t + 2*overhang)
+        self.edgeCorner(edges[2], edges[3])
+        edges[3](h + 2*t)
+        self.corner(90, overhang)
+
+        self.move(tw, th, move)
+
     def side_hole(self, width):
         self.rectangularHole(width/2, self.h/2,
                              0.75*width, 0.75*self.h,
@@ -61,7 +86,8 @@ class BirdHouse(Boxes):
         x, y, h = self.x, self.y, self.h
 
         roof = 2**0.5 * x / 2
-
+        overhang = roof * self.roof_overhang
+        
         cbx = [lambda: self.side_hole(x)]
         cby = [lambda: self.side_hole(y)]
         
@@ -70,6 +96,6 @@ class BirdHouse(Boxes):
         self.rectangularWall(y, h, "hFeF", callback=cby, move="right")
         self.rectangularWall(y, h, "hFeF", callback=cby, move="right")
         self.rectangularWall(x, y, "ffff", move="right")
-        self.edges["h"].settings.setValues(self.thickness, relative=False, edge_width=0.1*roof)
-        self.flangedWall(y, roof, "ehfh", r=0.2*roof, flanges=[0.2*roof], move="right")
-        self.flangedWall(y, roof, "ehFh", r=0.2*roof, flanges=[0.2*roof], move="right")
+        self.edges["h"].settings.setValues(self.thickness, relative=False, edge_width=overhang)
+        self.roof(y, roof, overhang, "eefe", move="right")
+        self.roof(y, roof, overhang, "eeFe", move="right")