boxespy/boxes/generators/bottlestack.py

#!/usr/bin/env python3
# Copyright (C) 2013-2020 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 BottleStack(Boxes):
    """Stack bottles in a fridge"""

    description = """When rendered with the "double" option the parts with the double slots get connected the shorter beams in the asymmetrical slots.

Without the "double" option the stand is a bit more narrow.
"""

    ui_group = "Misc"

    def __init__(self):
        Boxes.__init__(self)
        
        self.argparser.add_argument(
            "--diameter",  action="store", type=float, default=80,
            help="diameter of the bottles in mm")
        self.argparser.add_argument(
            "--number",  action="store", type=int, default=3,
            help="number of bottles to hold in the bottom row")
        self.argparser.add_argument(
            "--depth",  action="store", type=float, default=80,
            help="depth of the stand along the base of the bottles")
        self.argparser.add_argument(
            "--double",  action="store", type=boolarg, default=True,
            help="two pieces that can be combined to up to double the width")
        


    def front(self, h_sides, offset=0, move=None):
        t = self.thickness
        a = 60
        nr = self.number
        r1 = self.diameter / 2.0 # bottle
        r2 = r1 / math.cos(math.radians(90-a)) - r1 # inbetween
        if self.double:
            r3 = 1.5*t # upper corners
        else:
            r3 = .5*t
        h = (r1+r2) * (1-math.cos(math.radians(a)))
        h_extra = 1*t
        h_s = h_sides - t
        p = 0.05*t # play
        
        tw, th = nr * r1 * 2 + 2*r3, h + 2*t

        
        if self.move(tw, th, move, True):
            return

        open_sides = r3 <= 0.5*t

        if offset == 0:
            slot = [0, 90, h_s, -90, t, -90, h_s, 90]
            if open_sides:
                self.moveTo(0, h_s)
                self.polyline(r3-0.5*t)
                self.polyline(*slot[4:])
            else:
                self.polyline(r3-0.5*t)
                self.polyline(*slot)
            for i in range(nr-open_sides):
                self.polyline(2*r1-t)
                self.polyline(*slot)
            if open_sides:
                self.polyline(2*r1-t)
                self.polyline(*slot[:-3])
                self.polyline(r3-0.5*t)
            else:
                self.polyline(r3-0.5*t)
        else:
            slot = [0, 90, h_s, -90, t, -90, h_s, 90]
            h_s += t
            slot2 = [0, 90, h_s, -90, t+2*p, -90, h_s, 90]
            if open_sides:
                self.moveTo(0, h_s)
                self.polyline(t+p, -90, h_s, 90)
            else:
                self.polyline(r3-0.5*t-p)
                self.polyline(*slot2)
            self.polyline(t-p)
            self.polyline(*slot)
            self.polyline(2*r1-5*t)
            self.polyline(*slot)
            self.polyline(t-p)
            self.polyline(*slot2)
            for i in range(1, nr-open_sides):
                self.polyline(2*r1-3*t-p)
                self.polyline(*slot)
                self.polyline(t-p)
                self.polyline(*slot2)
            if open_sides:
                self.polyline(2*r1-3*t-p)
                self.polyline(*slot)
                self.polyline(t-p)
                self.polyline(0, 90, h_s, -90, t+p)
            else:
                self.polyline(r3-0.5*t-p)

        if open_sides:
            h_extra -= h_s
        
        self.polyline(0, 90, h_extra+h-r3, (90, r3))

        for i in range(nr):
            self.polyline(0, (a, r2), 0, (-2*a, r1), 0, (a, r2))
        self.polyline(0, (90, r3), h_extra+h-r3, 90)
            
        self.move(tw, th, move)

    def side(self, l, h, short=False, move=None):
        t = self.thickness
        short = bool(short)
        
        tw, th = l + 2*t - 4*t*short, h

        if self.move(tw, th, move, True):
            return

        self.moveTo(t, 0)
        
        self.polyline(l-3*t*short)
        if short:
            end = [90, h-t, 90, t, -90, t, 90]
        else:
            end = [(90, t), h-2*t, (90, t), 0, 90, t, -90, t, -90, t, 90]
        self.polyline(0, *end)
        self.polyline(l-2*t- 3*t*short)
        self.polyline(0, *reversed(end))

        self.move(tw, th, move)

    def render(self):
        t = self.thickness
        d = self.depth
        nr = self.number
        h_sides = 2*t
        pieces = 2 if self.double else 1
        
        for offset in range(pieces):
            self.front(h_sides, offset, move="up")
            self.front(h_sides, offset, move="up")

        for short in range(pieces):
            for i in range(nr+1):
                self.side(d, h_sides, short, move="up")