File size: 10,363 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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 | # 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> *
# * Copyright (c) 2020 FreeCAD Developers *
# * Copyright (c) 2024 FreeCAD Project Association *
# * *
# * 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. *
# * *
# * This program 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 program; if not, write to the Free Software *
# * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 *
# * USA *
# * *
# ***************************************************************************
"""Provides functions to create Sketch objects from Draft objects."""
## @package make_sketch
# \ingroup draftmake
# \brief Provides functions to create Sketch objects from Draft objects.
## \addtogroup draftmake
# @{
import math
import FreeCAD as App
import DraftVecUtils
import DraftGeomUtils
from draftutils import gui_utils
from draftutils import utils
from draftutils.translate import translate
def make_sketch(
objects_list,
autoconstraints=False,
addTo=None,
delete=False,
name="Sketch",
radiusPrecision=-1,
tol=1e-3,
):
"""make_sketch(objects_list, [autoconstraints], [addTo], [delete],
[name], [radiusPrecision], [tol])
Makes a Sketch objects_list with the given Draft objects.
Parameters
----------
objects_list: can be single or list of objects of Draft type objects,
Part::Feature, Part.Shape, or mix of them.
autoconstraints(False): if True, coincident, horizontal and vertical
constraints will be added automatically.
addTo(None): if set to an existing sketch, geometry will be added to it
instead of creating a new one.
delete(False): if True, the original object will be deleted.
If set to a string "all" the object and all its linked object will be
deleted.
name("Sketch"): the name for the new sketch object.
radiusPrecision(-1): If <0, disable radius constraint. If =0, add individual
radius constraint. If >0, the radius will be rounded according to this
precision, and "Equal" constraint will be added to curve with equal
radius within precision.
tol(1e-3): Tolerance used to check if the shapes are planar and coplanar.
Consider change to tol=-1 for a more accurate analysis.
"""
if not App.ActiveDocument:
App.Console.PrintError("No active document. Aborting\n")
return
import Part
from Sketcher import Constraint
# lists to accumulate shapes with defined normal and undefined normal
shape_norm_yes = list()
shape_norm_no = list()
if not isinstance(objects_list, (list, tuple)):
objects_list = [objects_list]
for obj in objects_list:
if isinstance(obj, Part.Shape):
shape = obj
elif not hasattr(obj, "Shape"):
App.Console.PrintError(translate("draft", "No shape found") + "\n")
return None
else:
shape = obj.Shape
if not DraftGeomUtils.is_planar(shape, tol):
App.Console.PrintError(translate("draft", "All shapes must be planar") + "\n")
return None
if DraftGeomUtils.get_normal(shape, tol):
shape_norm_yes.append(shape)
else:
shape_norm_no.append(shape)
shapes_list = shape_norm_yes + shape_norm_no
# test if all shapes are coplanar
if len(shape_norm_yes) >= 1:
for shape in shapes_list[1:]:
if not DraftGeomUtils.are_coplanar(shapes_list[0], shape, tol):
App.Console.PrintError(translate("draft", "All shapes must be coplanar") + "\n")
return None
# define sketch normal
normal = DraftGeomUtils.get_normal(shapes_list[0], tol)
else:
# suppose all geometries are straight lines or points
points = [vertex.Point for shape in shapes_list for vertex in shape.Vertexes]
if len(points) >= 2:
try:
poly = Part.makePolygon(points)
except Part.OCCError:
# all points coincide
normal = App.Vector(0, 0, 1)
else:
if not DraftGeomUtils.is_planar(poly, tol):
App.Console.PrintError(translate("draft", "All shapes must be coplanar") + "\n")
return None
normal = DraftGeomUtils.get_shape_normal(poly)
else:
# only one point
normal = App.Vector(0, 0, 1)
if addTo:
nobj = addTo
else:
nobj = App.ActiveDocument.addObject("Sketcher::SketchObject", name)
# Collect constraints and add in one go to improve performance
constraints = []
radiuses = {}
def addRadiusConstraint(edge):
try:
if radiusPrecision < 0:
return
if radiusPrecision == 0:
constraints.append(Constraint("Radius", nobj.GeometryCount - 1, edge.Curve.Radius))
return
r = round(edge.Curve.Radius, radiusPrecision)
constraints.append(Constraint("Equal", radiuses[r], nobj.GeometryCount - 1))
except KeyError:
radiuses[r] = nobj.GeometryCount - 1
constraints.append(Constraint("Radius", nobj.GeometryCount - 1, r))
except AttributeError:
pass
def convertBezier(edge):
if DraftGeomUtils.geomType(edge) == "BezierCurve":
return edge.Curve.toBSpline(edge.FirstParameter, edge.LastParameter).toShape()
else:
return edge
axis = App.Vector(0, 0, 1).cross(normal)
if axis.Length > 1e-6:
axis.normalize()
elif normal.z >= 0:
axis = App.Vector(0, 0, 1)
else:
axis = App.Vector(0, 0, -1)
angle = math.degrees(DraftVecUtils.angle(normal, App.Vector(0, 0, 1)))
rotation = App.Rotation(axis, angle)
point = shapes_list[0].Vertexes[0].Point
base = App.Vector(normal)
base.Length = point.dot(
base.normalize()
) # See https://forum.freecad.org/viewtopic.php?f=22&t=69304#p601149
nobj.Placement = App.Placement(base, rotation)
for obj in objects_list:
ok = False
tp = utils.get_type(obj)
if tp == "Point":
# obj.Shape.copy() does not work properly for a Draft_Point.
# The coords of the point are multiplied by 2.
# We therefore create a Part Vertex instead.
shape = Part.Vertex(obj.Shape.Point)
if angle:
shape.rotate(App.Vector(0, 0, 0), axis, -angle)
point = Part.Point(shape.Point)
nobj.addGeometry(point)
ok = True
elif tp == "Shape" or hasattr(obj, "Shape"):
shape = obj if tp == "Shape" else obj.Shape
for e in shape.Edges:
newedge = convertBezier(e)
nobj.addGeometry(DraftGeomUtils.orientEdge(newedge, normal, make_arc=True))
addRadiusConstraint(newedge)
ok = True
if ok and delete:
def delObj(obj):
if obj.InList:
App.Console.PrintWarning(
translate(
"draft", "Cannot delete object {} with dependency".format(obj.Label)
)
+ "\n"
)
else:
obj.Document.removeObject(obj.Name)
try:
if delete == "all":
objs = [obj]
while objs:
obj = objs[0]
objs = objs[1:] + obj.OutList
delObj(obj)
else:
delObj(obj)
except Exception as ex:
App.Console.PrintWarning(
translate("draft", "Failed to delete object {}: {}".format(obj.Label, ex))
+ "\n"
)
nobj.addConstraint(constraints)
if autoconstraints:
nobj.detectMissingPointOnPointConstraints(utils.tolerance())
nobj.makeMissingPointOnPointCoincident(False)
nobj.detectMissingVerticalHorizontalConstraints(utils.tolerance())
nobj.makeMissingVerticalHorizontal(False)
# The MissingVerticalHorizontal functions do not work properly.
# If elements are added to an existing sketch redundant constraints are created.
# This can happen if DXF files are imported with the legacy importer.
# https://forum.freecad.org/viewtopic.php?t=97072
# https://github.com/FreeCAD/FreeCAD/issues/21396
# To address this we check for redundant constraints. This can be necessary even
# the functions were to work properly. For example with this scenario:
# https://github.com/FreeCAD/FreeCAD/issues/19978
nobj.solve()
for idx in nobj.RedundantConstraints[::-1]:
# Output of RedundantConstraints is one-based.
nobj.delConstraint(idx - 1)
return nobj
makeSketch = make_sketch
## @}
|