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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 | # SPDX-License-Identifier: LGPL-2.1-or-later
# ***************************************************************************
# * Copyright (c) 2009, 2010 Yorik van Havre <yorik@uncreated.net> *
# * Copyright (c) 2009, 2010 Ken Cline <cline@frii.com> *
# * *
# * This file is part of the FreeCAD CAx development system. *
# * *
# * This program is free software; you can redistribute it and/or modify *
# * it under the terms of the GNU Lesser General Public License (LGPL) *
# * as published by the Free Software Foundation; either version 2 of *
# * the License, or (at your option) any later version. *
# * for detail see the LICENCE text file. *
# * *
# * FreeCAD 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 FreeCAD; if not, write to the Free Software *
# * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 *
# * USA *
# * *
# ***************************************************************************
"""Provides various functions to work with cubic shapes (parallelepipeds)."""
## @package cuboids
# \ingroup draftgeoutils
# \brief Provides various functions for cubic shapes (parallelepipeds).
## \addtogroup draftgeoutils
# @{
import math
import FreeCAD as App
import DraftVecUtils
from draftgeoutils.general import geomType, vec, precision
def isCubic(shape):
"""Return True if the shape is a parallelepiped (cuboid).
A parallelepiped of cube-like shape has 8 vertices, 6 faces, 12 edges,
and all angles are 90 degrees between its edges.
"""
# first we try fast methods
if len(shape.Vertexes) != 8 or len(shape.Faces) != 6 or len(shape.Edges) != 12:
return False
for e in shape.Edges:
if geomType(e) != "Line":
return False
# if ok until now, let's do more advanced testing
for f in shape.Faces:
if len(f.Edges) != 4:
return False
for i in range(4):
e1 = vec(f.Edges[i])
if i < 3:
e2 = vec(f.Edges[i + 1])
else:
e2 = vec(f.Edges[0])
rpi = [0.0, round(math.pi / 2, precision())]
if round(e1.getAngle(e2), precision()) not in rpi:
return False
return True
def getCubicDimensions(shape):
"""Return a list containing the placement, and dimensions of the shape.
The dimensios are length, width and height of a the parallelepiped,
rounded to the value indicated by `precision`.
The placement point is the lowest corner of the shape.
If it is not a parallelepiped (cuboid), return None.
"""
if not isCubic(shape):
return None
# determine lowest face, which will be our base
z = [10, 1000000000000]
for i in range(len(shape.Faces)):
if shape.Faces[i].CenterOfMass.z < z[1]:
z = [i, shape.Faces[i].CenterOfMass.z]
if z[0] > 5:
return None
base = shape.Faces[z[0]]
basepoint = base.Edges[0].Vertexes[0].Point
plpoint = base.CenterOfMass
# basenorm = base.normalAt(0.5, 0.5)
# getting length and width
vx = vec(base.Edges[0])
vy = vec(base.Edges[1])
if round(vx.Length) == round(vy.Length):
vy = vec(base.Edges[2])
# getting rotations
rotZ = DraftVecUtils.angle(vx)
rotY = DraftVecUtils.angle(vx, App.Vector(vx.x, vx.y, 0))
rotX = DraftVecUtils.angle(vy, App.Vector(vy.x, vy.y, 0))
# getting height
vz = None
rpi = round(math.pi / 2, precision())
for i in range(1, 6):
for e in shape.Faces[i].Edges:
if basepoint in [e.Vertexes[0].Point, e.Vertexes[1].Point]:
vtemp = vec(e)
# print(vtemp)
if round(vtemp.getAngle(vx), precision()) == rpi:
if round(vtemp.getAngle(vy), precision()) == rpi:
vz = vtemp
if not vz:
return None
mat = App.Matrix()
mat.move(plpoint)
mat.rotateX(rotX)
mat.rotateY(rotY)
mat.rotateZ(rotZ)
return [
App.Placement(mat),
round(vx.Length, precision()),
round(vy.Length, precision()),
round(vz.Length, precision()),
]
## @}
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