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985c397 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 | # SPDX-License-Identifier: LGPL-2.1-or-later
# /***************************************************************************
# * Copyright (c) 2016 Victor Titov (DeepSOIC) <vv.titov@gmail.com> *
# * *
# * This file is part of the FreeCAD CAx development system. *
# * *
# * This library is free software; you can redistribute it and/or *
# * modify it under the terms of the GNU Library General Public *
# * License as published by the Free Software Foundation; either *
# * version 2 of the License, or (at your option) any later version. *
# * *
# * This library 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 Library General Public License for more details. *
# * *
# * You should have received a copy of the GNU Library General Public *
# * License along with this library; see the file COPYING.LIB. If not, *
# * write to the Free Software Foundation, Inc., 59 Temple Place, *
# * Suite 330, Boston, MA 02111-1307, USA *
# * *
# ***************************************************************************/
__title__ = "BOPTools.JoinAPI module"
__author__ = "DeepSOIC"
__url__ = "https://www.freecad.org"
__doc__ = "JoinFeatures functions that operate on shapes."
import Part
from . import ShapeMerge
from .GeneralFuseResult import GeneralFuseResult
from .Utils import compoundLeaves
def shapeOfMaxSize(list_of_shapes):
"""shapeOfMaxSize(list_of_shapes): finds the shape that has the largest "
"mass in the list and returns it. The shapes in the list must be of same dimension."""
# first, check if shapes can be compared by size
ShapeMerge.dimensionOfShapes(list_of_shapes)
rel_precision = 1e-8
# find it!
max_size = -1e100 # max size encountered so far
count_max = 0 # number of shapes with size equal to max_size
shape_max = None # shape of max_size
for sh in list_of_shapes:
v = abs(Part.cast_to_shape(sh).Mass)
if v > max_size * (1 + rel_precision):
max_size = v
shape_max = sh
count_max = 1
elif (1 - rel_precision) * max_size <= v and v <= (1 + rel_precision) * max_size:
count_max = count_max + 1
if count_max > 1:
raise ValueError("There is more than one largest piece!")
return shape_max
def connect(list_of_shapes, tolerance=0.0):
"""connect(list_of_shapes, tolerance = 0.0): connects solids (walled objects), shells and
wires by throwing off small parts that result when splitting them at intersections.
Compounds in list_of_shapes are automatically exploded, so self-intersecting compounds
are valid for connect."""
# explode all compounds before GFA.
new_list_of_shapes = []
for sh in list_of_shapes:
new_list_of_shapes.extend(compoundLeaves(sh))
list_of_shapes = new_list_of_shapes
# test if shapes are compatible for connecting
dim = ShapeMerge.dimensionOfShapes(list_of_shapes)
if dim == 0:
raise TypeError("Cannot connect vertices!")
if len(list_of_shapes) < 2:
return Part.makeCompound(list_of_shapes)
pieces, map = list_of_shapes[0].generalFuse(list_of_shapes[1:], tolerance)
ao = GeneralFuseResult(list_of_shapes, (pieces, map))
ao.splitAggregates()
# print len(ao.pieces)," pieces total"
keepers = []
all_danglers = [] # debug
# add all biggest dangling pieces
for src in ao.source_shapes:
danglers = [
piece for piece in ao.piecesFromSource(src) if len(ao.sourcesOfPiece(piece)) == 1
]
all_danglers.extend(danglers)
largest = shapeOfMaxSize(danglers)
if largest is not None:
keepers.append(largest)
touch_test_list = Part.makeCompound(keepers)
# add all intersection pieces that touch danglers, triple intersection pieces that touch duals, and so on
for ii in range(2, ao.largestOverlapCount() + 1):
list_ii_pieces = [piece for piece in ao.pieces if len(ao.sourcesOfPiece(piece)) == ii]
keepers_2_add = []
for piece in list_ii_pieces:
if ShapeMerge.isConnected(piece, touch_test_list):
keepers_2_add.append(piece)
if len(keepers_2_add) == 0:
break
keepers.extend(keepers_2_add)
touch_test_list = Part.makeCompound(keepers_2_add)
# merge, and we are done!
# print len(keepers)," pieces to keep"
return ShapeMerge.mergeShapes(keepers)
def connect_legacy(shape1, shape2, tolerance=0.0):
"""connect_legacy(shape1, shape2, tolerance = 0.0): alternative implementation of
connect, without use of generalFuse. Slow. Provided for backwards compatibility, and
for older OCC."""
if tolerance > 0.0:
import FreeCAD as App
App.Console.PrintWarning("connect_legacy does not support tolerance (yet).\n")
cut1 = shape1.cut(shape2)
cut1 = shapeOfMaxSize(cut1.childShapes())
cut2 = shape2.cut(shape1)
cut2 = shapeOfMaxSize(cut2.childShapes())
return cut1.multiFuse([cut2, shape2.common(shape1)])
# def embed(shape_base, shape_tool, tolerance = 0.0):
# (TODO)
def embed_legacy(shape_base, shape_tool, tolerance=0.0):
"""embed_legacy(shape_base, shape_tool, tolerance = 0.0): alternative implementation of
embed, without use of generalFuse. Slow. Provided for backwards compatibility, and
for older OCC."""
if tolerance > 0.0:
import FreeCAD as App
App.Console.PrintWarning("embed_legacy does not support tolerance (yet).\n")
# using legacy implementation, except adding support for shells
pieces = compoundLeaves(shape_base.cut(shape_tool))
piece = shapeOfMaxSize(pieces)
result = piece.fuse(shape_tool)
dim = ShapeMerge.dimensionOfShapes(pieces)
if dim == 2:
# fusing shells returns shells that are still split. Reassemble them
result = ShapeMerge.mergeShapes(result.Faces)
elif dim == 1:
result = ShapeMerge.mergeShapes(result.Edges)
return result
def cutout_legacy(shape_base, shape_tool, tolerance=0.0):
"""cutout_legacy(shape_base, shape_tool, tolerance = 0.0): alternative implementation of
cutout, without use of generalFuse. Slow. Provided for backwards compatibility, and
for older OCC."""
if tolerance > 0.0:
import FreeCAD as App
App.Console.PrintWarning("cutout_legacy does not support tolerance (yet).\n")
# if base is multi-piece, work on per-piece basis
shapes_base = compoundLeaves(shape_base)
if len(shapes_base) > 1:
result = []
for sh in shapes_base:
result.append(cutout(sh, shape_tool))
return Part.makeCompound(result)
shape_base = shapes_base[0]
pieces = compoundLeaves(shape_base.cut(shape_tool))
return shapeOfMaxSize(pieces)
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