85 lines
3.1 KiB
Python
85 lines
3.1 KiB
Python
# Copyright (C) 2018 Michael Matthews
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#
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# This file is part of CutCraft.
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#
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# CutCraft 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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# CutCraft 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 CutCraft. If not, see <http://www.gnu.org/licenses/>.
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from ..core.trace import Trace
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from .support import Support
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from ..util import isclose
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class Pier(Support):
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""" List of segments that make up a part. """
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def __init__(self, height, depth, cutdepth, levels, thickness):
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super(Pier, self).__init__(height, thickness)
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self.depth = depth
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self.cutdepth = cutdepth
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# The 'levels' list is defined as follows:
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# [(height1, x-offset1), (height2, x-offset2), ...]
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# where the values are:
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# height<n>: The height of the bottom of the platform (0.0=at base level, height-thickness=at top level).
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# x-offset<n>: The distance from the core axis for this level. Used to create slopes and curves.
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ys, xs = zip(*sorted(levels))
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if any([(h2) - (h1) < 3*thickness for h1, h2
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in zip(ys[:-1], ys[1:])]):
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raise RuntimeError("Pier levels are too close. Try decreasing the number of levels.")
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self.topcut = isclose(ys[-1], height-thickness)
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self.bottomcut = isclose(ys[0], 0.0)
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self.vertical = all([isclose(x1, x2) for x1, x2 in zip(xs[:-1], xs[1:])])
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# Starting at the bottom inner point, trace up the uncut side.
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if self.vertical:
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tx = [0.0, 0.0]
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ty = [0.0, height]
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else:
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tx = list(xs)
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ty = list(ys[:-1]) + [height]
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# Add the top points.
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xtop = xs[0]
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xbottom = xs[-1]
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if self.topcut:
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tx.extend([xtop+depth-cutdepth, xtop+depth-cutdepth, xtop+depth])
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ty.extend([height, height-thickness, height-thickness])
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else:
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tx.extend([xtop+depth])
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ty.extend([height])
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if self.topcut and self.bottomcut:
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xs = xs[1:-1]
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ys = ys[1:-1]
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elif self.topcut:
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xs = xs[:-1]
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ys = ys[:-1]
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elif self.bottomcut:
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xs = xs[1:]
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ys = ys[1:]
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for y, x in zip(reversed(ys), reversed(xs)):
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tx.extend([x+depth, x+depth-cutdepth, x+depth-cutdepth, x+depth])
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ty.extend([y+thickness, y+thickness, y, y])
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if self.bottomcut:
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tx.extend([xbottom+depth, xbottom+depth-cutdepth, xbottom+depth-cutdepth, xbottom])
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ty.extend([thickness, thickness, 0.0, 0.0])
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else:
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tx.extend([xbottom+depth, xbottom])
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ty.extend([0.0, 0.0])
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self.traces.append(Trace(x=tx, y=ty))
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