File size: 5,355 Bytes
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 | # SPDX-License-Identifier: LGPL-2.1-or-later
# ***************************************************************************
# * Copyright (c) 2017 Lorenz Lechner *
# * *
# * 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 *
# * *
# ***************************************************************************/
import Mesh
import FreeCAD as App
import FreeCADGui as Gui
import Part
import MeshPartGui
from PySide.QtCore import QT_TRANSLATE_NOOP # for translations
class BaseCommand(object):
def __init__(self):
pass
def IsActive(self):
if App.ActiveDocument is None:
return False
else:
return True
class CreateFlatMesh(BaseCommand):
"""create flat wires from a meshed face"""
def GetResources(self):
return {
"Pixmap": "MeshPart_CreateFlatMesh.svg",
"MenuText": QT_TRANSLATE_NOOP("MeshPart_CreateFlatMesh", "Unwrap Mesh"),
"ToolTip": QT_TRANSLATE_NOOP(
"MeshPart_CreateFlatMesh", "Finds a flat representation of a mesh"
),
}
def Activated(self):
import numpy as np
import flatmesh
obj = Gui.Selection.getSelection()[
0
] # obj must be a Mesh (Mesh-Design->Meshes->Create-Mesh)
points = np.array([[i.x, i.y, i.z] for i in obj.Mesh.Points])
faces = np.array([list(i) for i in obj.Mesh.Topology[1]])
flattener = flatmesh.FaceUnwrapper(points, faces)
flattener.findFlatNodes(5, 0.95)
boundaries = flattener.getFlatBoundaryNodes()
# print('number of nodes: {}'.format(len(flattener.ze_nodes)))
# print('number of faces: {}'.format(len(flattener.tris)))
wires = []
for edge in boundaries:
pi = Part.makePolygon([App.Vector(*node) for node in edge])
Part.show(Part.Wire(pi))
def IsActive(self):
assert super(CreateFlatMesh, self).IsActive()
assert isinstance(Gui.Selection.getSelection()[0].Mesh, Mesh.Mesh)
return True
class CreateFlatFace(BaseCommand):
"""create a flat face from a single face
only full faces are supported right now"""
def GetResources(self):
return {
"Pixmap": "MeshPart_CreateFlatFace.svg",
"MenuText": QT_TRANSLATE_NOOP("MeshPart_CreateFlatFace", "Unwrap Face"),
"ToolTip": QT_TRANSLATE_NOOP(
"MeshPart_CreateFlatFace", "Finds a flat representation of a face"
),
}
def Activated(self):
import numpy as np
import flatmesh
face = Gui.Selection.getSelectionEx()[0].SubObjects[0]
shape = face.toNurbs()
face = shape.Faces[0]
nurbs = face.Surface
nurbs.setUNotPeriodic()
nurbs.setVNotPeriodic()
bs = nurbs.toBSpline(1, "C0", "C0", 3, 3, 10)
face = bs.toShape()
face.tessellate(0.01)
flattener = flatmesh.FaceUnwrapper(face)
flattener.findFlatNodes(5, 0.99)
poles = flattener.interpolateFlatFace(face)
num_u_poles = len(bs.getPoles())
num_v_poles = len(bs.getPoles()[0])
i = 0
for u in range(num_u_poles):
for v in range(num_v_poles):
bs.setPole(u + 1, v + 1, App.Vector(poles[i]))
i += 1
Part.show(bs.toShape())
def IsActive(self):
assert super(CreateFlatFace, self).IsActive()
assert isinstance(Gui.Selection.getSelectionEx()[0].SubObjects[0], Part.Face)
return True
# Test if pybind11 dependency is available
try:
import flatmesh
Gui.addCommand("MeshPart_CreateFlatMesh", CreateFlatMesh())
Gui.addCommand("MeshPart_CreateFlatFace", CreateFlatFace())
except ImportError:
App.Console.PrintLog("flatmesh-commands are not available\n")
App.Console.PrintLog("flatmesh needs pybind11 as build dependency\n")
except AttributeError:
# Can happen when running FreeCAD in headless mode
pass
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