547 lines
18 KiB
Python
547 lines
18 KiB
Python
#!/usr/bin/env python3
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# -*- coding: utf-8 -*-
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# Copyright (C) 2013-2014 Florian Festi
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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from functools import partial
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from boxes import Boxes, edges, boolarg
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import math
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class DividerTray(Boxes):
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"""Divider tray - rows and dividers"""
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ui_group = "Tray"
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def __init__(self):
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Boxes.__init__(self)
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self.addSettingsArgs(edges.FingerJointSettings)
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self.buildArgParser("sx", "sy", "h", "outside")
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self.argparser.add_argument(
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"--slot_depth", type=float, default=20, help="depth of the slot in mm"
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)
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self.argparser.add_argument(
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"--slot_angle",
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type=float,
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default=0,
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help="angle at which slots are generated, in degrees. 0° is vertical.",
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)
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self.argparser.add_argument(
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"--slot_radius",
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type=float,
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default=2,
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help="radius of the slot entrance in mm",
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)
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self.argparser.add_argument(
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"--slot_extra_slack",
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type=float,
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default=0.2,
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help="extra slack (in addition to thickness and kerf) for slot width to help insert dividers",
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)
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self.argparser.add_argument(
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"--divider_bottom_margin",
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type=float,
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default=0,
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help="margin between box's bottom and divider's",
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)
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self.argparser.add_argument(
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"--divider_upper_notch_radius",
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type=float,
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default=1,
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help="divider's notch's upper radius",
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)
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self.argparser.add_argument(
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"--divider_lower_notch_radius",
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type=float,
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default=8,
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help="divider's notch's lower radius",
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)
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self.argparser.add_argument(
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"--divider_notch_depth",
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type=float,
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default=15,
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help="divider's notch's depth",
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)
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self.argparser.add_argument(
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"--left_wall",
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type=boolarg,
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default=True,
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help="generate wall on the left side",
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)
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self.argparser.add_argument(
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"--right_wall",
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type=boolarg,
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default=True,
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help="generate wall on the right side",
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)
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self.argparser.add_argument(
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"--bottom", type=boolarg, default=False, help="generate wall on the bottom",
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)
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def render(self):
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side_walls_number = len(self.sx) - 1 + sum([self.left_wall, self.right_wall])
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if side_walls_number == 0:
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raise ValueError("You need at least one side wall to generate this tray")
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# If measures are inside, we need to adjust height before slot generation
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if not self.outside:
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# If the parameter 'h' is the inner height of the content itself,
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# then the actual tray height needs to be adjusted with the angle
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self.h = self.h * math.cos(math.radians(self.slot_angle))
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slot_descriptions = SlotDescriptionsGenerator().generate_all_same_angles(
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self.sy,
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self.thickness,
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self.slot_extra_slack,
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self.slot_depth,
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self.h,
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self.slot_angle,
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self.slot_radius,
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)
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# If measures are outside, we need to readjust slots afterwards
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if self.outside:
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self.sx = self.adjustSize(self.sx, self.left_wall, self.right_wall)
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side_wall_target_length = sum(self.sy) - 2 * self.thickness
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slot_descriptions.adjust_to_target_length(side_wall_target_length)
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self.ctx.save()
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# Facing walls (outer) with finger holes to support side walls
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facing_wall_length = sum(self.sx) + self.thickness * (len(self.sx) - 1)
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side_edge = lambda with_wall: "F" if with_wall else "e"
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bottom_edge = lambda with_wall: "F" if with_wall else "e"
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for _ in range(2):
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self.rectangularWall(
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facing_wall_length,
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self.h,
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[
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bottom_edge(self.bottom),
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side_edge(self.right_wall),
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"e",
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side_edge(self.left_wall),
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],
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callback=[partial(self.generate_finger_holes, self.h)],
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move="up",
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)
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# Side walls (outer & inner) with slots to support dividers
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side_wall_length = slot_descriptions.total_length()
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for _ in range(side_walls_number):
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if _ < side_walls_number - (len(self.sx) - 1):
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be = "F" if self.bottom else "e"
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else:
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be = "f" if self.bottom else "e"
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se = DividerSlotsEdge(self, slot_descriptions.descriptions)
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self.rectangularWall(
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side_wall_length, self.h, [be, "f", se, "f"], move="up"
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)
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# Switch to right side of the file
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self.ctx.restore()
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self.rectangularWall(
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max(facing_wall_length, side_wall_length), self.h, "ffff", move="right only"
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)
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# Bottom piece.
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if self.bottom:
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self.rectangularWall(
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facing_wall_length,
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side_wall_length,
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[
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"f",
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"f" if self.right_wall else "e",
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"f",
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"f" if self.left_wall else "e",
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],
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callback=[partial(self.generate_finger_holes, side_wall_length)],
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move="up",
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)
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# Dividers
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divider_height = (
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# h, with angle adjustement
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self.h / math.cos(math.radians(self.slot_angle))
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# removing what exceeds in the width of the divider
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- self.thickness * math.tan(math.radians(self.slot_angle))
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# with margin
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- self.divider_bottom_margin
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)
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for i, length in enumerate(self.sx):
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is_first_wall = i == 0
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is_last_wall = i == len(self.sx) - 1
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self.generate_divider(
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length,
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divider_height,
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"up",
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only_one_wall=(is_first_wall and not self.left_wall)
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or (is_last_wall and not self.right_wall),
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)
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if self.debug:
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debug_info = ["Debug"]
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debug_info.append(
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"Slot_edge_outer_length:{0:.2f}".format(
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slot_descriptions.total_length() + 2 * self.thickness
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)
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)
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debug_info.append(
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"Slot_edge_inner_lengths:{0}".format(
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str.join(
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"|",
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[
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"{0:.2f}".format(e.usefull_length())
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for e in slot_descriptions.get_straigth_edges()
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],
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)
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)
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)
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debug_info.append(
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"Face_edge_outer_length:{0:.2f}".format(
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facing_wall_length
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+ self.thickness * sum([self.left_wall, self.right_wall])
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)
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)
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debug_info.append(
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"Face_edge_inner_lengths:{0}".format(
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str.join("|", ["{0:.2f}".format(e) for e in self.sx])
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)
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)
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debug_info.append("Tray_height:{0:.2f}".format(self.h))
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debug_info.append(
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"Content_height:{0:.2f}".format(
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self.h / math.cos(math.radians(self.slot_angle))
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)
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)
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self.text(str.join("\n", debug_info), x=5, y=5, align="bottom left")
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def generate_finger_holes(self, length):
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posx = -0.5 * self.thickness
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for x in self.sx[:-1]:
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posx += x + self.thickness
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self.fingerHolesAt(posx, 0, length)
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def generate_divider(self, width, height, move, only_one_wall=False):
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second_tab_width = 0 if only_one_wall else self.thickness
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total_width = width + self.thickness + second_tab_width
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if self.move(total_width, height, move, True):
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return
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# Upper edge with a finger notch
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upper_radius = self.divider_upper_notch_radius
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lower_radius = self.divider_lower_notch_radius
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upper_third = (width - 2 * upper_radius - 2 * lower_radius) / 3
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# Upper: first tab width
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self.edge(self.thickness)
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# Upper: divider width (with notch if possible)
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if upper_third > 0:
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self.polyline(
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upper_third,
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(90, upper_radius),
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self.divider_notch_depth - upper_radius - lower_radius,
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(-90, lower_radius),
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upper_third,
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(-90, lower_radius),
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self.divider_notch_depth - upper_radius - lower_radius,
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(90, upper_radius),
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upper_third,
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)
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else:
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# if there isn't enough room for the radius, we don't use it
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self.edge(width)
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self.polyline(
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# Upper: second tab width if needed
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second_tab_width,
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# First side, with tab depth only if there is 2 walls
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90,
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self.slot_depth,
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90,
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second_tab_width,
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-90,
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height - self.slot_depth,
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# Lower edge
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90,
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width,
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# Second side, always a tab
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90,
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height - self.slot_depth,
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-90,
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self.thickness,
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90,
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self.slot_depth,
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)
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# Move for next piece
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self.move(total_width, height, move)
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class SlottedEdgeDescriptions:
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def __init__(self):
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self.descriptions = []
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def add(self, description):
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self.descriptions.append(description)
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def get_straigth_edges(self):
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return [x for x in self.descriptions if isinstance(x, StraightEdgeDescription)]
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def get_last_edge(self):
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return self.descriptions[-1]
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def adjust_to_target_length(self, target_length):
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actual_length = sum([d.tracing_length() for d in self.descriptions])
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compensation = actual_length - target_length
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compensation_ratio = compensation / sum(
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[d.asked_length for d in self.get_straigth_edges()]
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)
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for edge in self.get_straigth_edges():
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edge.outside_ratio = 1 - compensation_ratio
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def total_length(self):
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return sum([x.tracing_length() for x in self.descriptions])
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class StraightEdgeDescription:
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def __init__(
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self,
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asked_length,
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round_edge_compensation=0,
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outside_ratio=1,
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angle_compensation=0,
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):
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self.asked_length = asked_length
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self.round_edge_compensation = round_edge_compensation
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self.outside_ratio = outside_ratio
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self.angle_compensation = angle_compensation
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def __repr__(self):
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return (
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"StraightEdgeDescription({0}, round_edge_compensation={1}, angle_compensation={2}, outside_ratio={3})"
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).format(
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self.asked_length,
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self.round_edge_compensation,
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self.angle_compensation,
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self.outside_ratio,
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)
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def tracing_length(self):
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"""
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How much length should take tracing this straight edge
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"""
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return (
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(self.asked_length * self.outside_ratio)
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- self.round_edge_compensation
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+ self.angle_compensation
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)
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def usefull_length(self):
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"""
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Part of the length which might be used by the content of the tray
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"""
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return self.asked_length * self.outside_ratio
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class Memoizer(dict):
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def __init__(self, computation):
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self.computation = computation
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def __missing__(self, key):
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res = self[key] = self.computation(key)
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return res
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class SlotDescription:
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_div_by_cos_cache = Memoizer(lambda a: 1 / math.cos(math.radians(a)))
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_tan_cache = Memoizer(lambda a: math.tan(math.radians(a)))
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def __init__(
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self, width, depth=20, angle=0, radius=0, start_radius=None, end_radius=None
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):
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self.depth = depth
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self.width = width
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self.start_radius = radius if start_radius == None else start_radius
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self.end_radius = radius if end_radius == None else end_radius
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self.angle = angle
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def __repr__(self):
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return "SlotDescription({0}, depth={1}, angle={2}, start_radius={3}, end_radius={4})".format(
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self.width, self.depth, self.angle, self.start_radius, self.end_radius
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)
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def _div_by_cos(self):
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return SlotDescription._div_by_cos_cache[self.angle]
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def _tan(self):
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return SlotDescription._tan_cache[self.angle]
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def angle_corrected_width(self):
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"""
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returns how much width is the slot when measured horizontally, since the angle makes it bigger.
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It's the same as the slot entrance width when radius is 0°.
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"""
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return self.width * self._div_by_cos()
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def round_edge_start_correction(self):
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"""
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returns by how much we need to stop tracing our straight lines at the start of the slot
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in order to do a curve line instead
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"""
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return self.start_radius * (self._div_by_cos() - self._tan())
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def round_edge_end_correction(self):
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"""
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returns by how much we need to stop tracing our straight lines at the end of the slot
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in order to do a curve line instead
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"""
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return self.end_radius * (self._div_by_cos() + self._tan())
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def _depth_angle_correction(self):
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"""
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The angle makes one side of the slot deeper than the other.
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"""
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extra_depth = self.width * self._tan()
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return extra_depth
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def corrected_start_depth(self):
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"""
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Returns the depth of the straigth part of the slot starting side
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"""
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extra_depth = self._depth_angle_correction()
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return self.depth + max(0, extra_depth) - self.round_edge_start_correction()
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def corrected_end_depth(self):
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"""
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Returns the depth of the straigth part of the slot ending side
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"""
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extra_depth = self._depth_angle_correction()
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return self.depth + max(0, -extra_depth) - self.round_edge_end_correction()
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def tracing_length(self):
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"""
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How much length this slot takes on an edge
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"""
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return (
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self.round_edge_start_correction()
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+ self.angle_corrected_width()
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+ self.round_edge_end_correction()
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)
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class SlotDescriptionsGenerator:
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def generate_all_same_angles(
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self, sections, thickness, extra_slack, depth, height, angle, radius=2,
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):
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width = thickness + extra_slack
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descriptions = SlottedEdgeDescriptions()
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# Special case: if first slot start at 0, then radius is 0
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first_correction = 0
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current_section = 0
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if sections[0] == 0:
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slot = SlotDescription(
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width, depth=depth, angle=angle, start_radius=0, end_radius=radius,
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)
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descriptions.add(slot)
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first_correction = slot.round_edge_end_correction()
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current_section += 1
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first_length = sections[current_section]
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current_section += 1
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descriptions.add(
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StraightEdgeDescription(
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first_length, round_edge_compensation=first_correction
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)
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)
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for l in sections[current_section:]:
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slot = SlotDescription(width, depth=depth, angle=angle, radius=radius,)
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# Fix previous edge length
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previous_edge = descriptions.get_last_edge()
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previous_edge.round_edge_compensation += slot.round_edge_start_correction()
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# Add this slot
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descriptions.add(slot)
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# Add the straigth edge after this slot
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descriptions.add(
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StraightEdgeDescription(l, slot.round_edge_end_correction())
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)
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# We need to add extra space for the divider (or the actual content)
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# to slide all the way down to the bottom of the tray in spite of walls
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end_length = height * math.tan(math.radians(angle))
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descriptions.get_last_edge().angle_compensation += end_length
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return descriptions
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class DividerSlotsEdge(edges.BaseEdge):
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"""Edge with multiple angled rounded slots for dividers"""
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description = "Edge with multiple angled rounded slots for dividers"
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def __init__(self, boxes, descriptions):
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super(DividerSlotsEdge, self).__init__(boxes, None)
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self.descriptions = descriptions
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def __call__(self, length, **kw):
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self.ctx.save()
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for description in self.descriptions:
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if isinstance(description, SlotDescription):
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self.do_slot(description)
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elif isinstance(description, StraightEdgeDescription):
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self.do_straight_edge(description)
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# rounding errors might accumulates :
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# restore context and redo the move straight
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self.ctx.restore()
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self.moveTo(length)
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def do_straight_edge(self, straight_edge):
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self.edge(straight_edge.tracing_length())
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def do_slot(self, slot):
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self.ctx.save()
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self.polyline(
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0,
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(90 - slot.angle, slot.start_radius),
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slot.corrected_start_depth(),
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-90,
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||
slot.width,
|
||
-90,
|
||
slot.corrected_end_depth(),
|
||
(90 + slot.angle, slot.end_radius),
|
||
)
|
||
|
||
# rounding errors might accumulates :
|
||
# restore context and redo the move straight
|
||
self.ctx.restore()
|
||
self.moveTo(slot.tracing_length())
|