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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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 | # 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 *
# * *
# * 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 the object code for the BezCurve object."""
## @package bezcurve
# \ingroup draftobjects
# \brief Provides the object code for the BezCurve object.
## \addtogroup draftobjects
# @{
from PySide.QtCore import QT_TRANSLATE_NOOP
import FreeCAD as App
from draftutils import gui_utils
from draftutils import params
from draftobjects.base import DraftObject
class BezCurve(DraftObject):
"""The BezCurve object"""
def __init__(self, obj):
super().__init__(obj, "BezCurve")
_tip = QT_TRANSLATE_NOOP("App::Property", "The points of the Bezier curve")
obj.addProperty("App::PropertyVectorList", "Points", "Draft", _tip, locked=True)
_tip = QT_TRANSLATE_NOOP("App::Property", "The degree of the Bezier function")
obj.addProperty("App::PropertyInteger", "Degree", "Draft", _tip, locked=True)
_tip = QT_TRANSLATE_NOOP("App::Property", "Continuity")
obj.addProperty("App::PropertyIntegerList", "Continuity", "Draft", _tip, locked=True)
_tip = QT_TRANSLATE_NOOP("App::Property", "If the Bezier curve should be closed or not")
obj.addProperty("App::PropertyBool", "Closed", "Draft", _tip, locked=True)
_tip = QT_TRANSLATE_NOOP("App::Property", "Create a face if this curve is closed")
obj.addProperty("App::PropertyBool", "MakeFace", "Draft", _tip, locked=True)
_tip = QT_TRANSLATE_NOOP("App::Property", "The length of this object")
obj.addProperty("App::PropertyLength", "Length", "Draft", _tip, locked=True)
_tip = QT_TRANSLATE_NOOP("App::Property", "The area of this object")
obj.addProperty("App::PropertyArea", "Area", "Draft", _tip, locked=True)
obj.MakeFace = params.get_param("MakeFaceMode")
obj.Closed = False
obj.Degree = 3
obj.Continuity = []
# obj.setEditorMode("Degree", 2)
obj.setEditorMode("Continuity", 1)
def onDocumentRestored(self, obj):
super().onDocumentRestored(obj)
gui_utils.restore_view_object(
obj, vp_module="view_bezcurve", vp_class="ViewProviderBezCurve"
)
def execute(self, fp):
if self.props_changed_placement_only():
fp.positionBySupport()
self.props_changed_clear()
return
self.createGeometry(fp)
fp.positionBySupport()
self.props_changed_clear()
def _segpoleslst(self, fp):
"""Split the points into segments."""
if not fp.Closed and len(fp.Points) >= 2: # allow lower degree segment
poles = fp.Points[1:]
elif fp.Closed and len(fp.Points) >= fp.Degree: # drawable
# poles=fp.Points[1:(fp.Degree*(len(fp.Points)//fp.Degree))]+fp.Points[0:1]
poles = fp.Points[1:] + fp.Points[0:1]
else:
poles = []
return [poles[x : x + fp.Degree] for x in range(0, len(poles), (fp.Degree or 1))]
def resetcontinuity(self, fp):
fp.Continuity = [0] * (len(self._segpoleslst(fp)) - 1 + 1 * fp.Closed)
# nump= len(fp.Points)-1+fp.Closed*1
# numsegments = (nump // fp.Degree) + 1 * (nump % fp.Degree > 0) -1
# fp.Continuity = [0]*numsegments
def onChanged(self, fp, prop):
self.props_changed_store(prop)
if prop == "Closed":
# if remove the last entry when curve gets opened
oldlen = len(fp.Continuity)
newlen = len(self._segpoleslst(fp)) - 1 + 1 * fp.Closed
if oldlen > newlen:
fp.Continuity = fp.Continuity[:newlen]
if oldlen < newlen:
fp.Continuity = fp.Continuity + [0] * (newlen - oldlen)
if (
hasattr(fp, "Closed")
and fp.Closed
and prop in ["Points", "Degree", "Closed"]
and len(fp.Points) % fp.Degree
):
# the curve editing tools can't handle extra points
fp.Points = fp.Points[: (fp.Degree * (len(fp.Points) // fp.Degree))]
# for closed curves
if prop in ["Degree"] and fp.Degree >= 1:
self.resetcontinuity(fp)
if prop in ["Points", "Degree", "Continuity", "Closed"]:
self.createGeometry(fp)
def createGeometry(self, fp):
import Part
plm = fp.Placement
if fp.Points:
startpoint = fp.Points[0]
edges = []
for segpoles in self._segpoleslst(fp):
# if len(segpoles) == fp.Degree # would skip additional poles
c = Part.BezierCurve() # last segment may have lower degree
c.increase(len(segpoles))
c.setPoles([startpoint] + segpoles)
edges.append(Part.Edge(c))
startpoint = segpoles[-1]
w = Part.Wire(edges)
if fp.Closed and w.isClosed():
try:
if hasattr(fp, "MakeFace"):
if fp.MakeFace:
w = Part.Face(w)
else:
w = Part.Face(w)
except Part.OCCError:
pass
fp.Shape = w
if hasattr(fp, "Area") and hasattr(w, "Area"):
fp.Area = w.Area
if hasattr(fp, "Length") and hasattr(w, "Length"):
fp.Length = w.Length
fp.Placement = plm
@classmethod
def symmetricpoles(cls, knot, p1, p2):
"""Make two poles symmetric respective to the knot."""
p1h = App.Vector(p1)
p2h = App.Vector(p2)
p1h.multiply(0.5)
p2h.multiply(0.5)
return (knot + p1h - p2h, knot + p2h - p1h)
@classmethod
def tangentpoles(cls, knot, p1, p2, allowsameside=False):
"""Make two poles have the same tangent at knot."""
p12n = p2.sub(p1)
p12n.normalize()
p1k = knot - p1
p2k = knot - p2
p1k_ = App.Vector(p12n)
kon12 = p1k * p12n
if allowsameside or not (kon12 < 0 or p2k * p12n > 0): # instead of moving
p1k_.multiply(kon12)
pk_k = knot - p1 - p1k_
return (p1 + pk_k, p2 + pk_k)
else:
return cls.symmetricpoles(knot, p1, p2)
@staticmethod
def modifysymmetricpole(knot, p1):
"""calculate the coordinates of the opposite pole
of a symmetric knot"""
return knot + knot - p1
@staticmethod
def modifytangentpole(knot, p1, oldp2):
"""calculate the coordinates of the opposite pole
of a tangent knot"""
pn = knot - p1
pn.normalize()
pn.multiply((knot - oldp2).Length)
return pn + knot
# Alias for compatibility with v0.18 and earlier
_BezCurve = BezCurve
## @}
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