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# * Copyright (c) 2023 edi <edi271@a1.net> *
# * *
# * 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 TechDraw AxoLengthDimension GuiCommand.
00.01 2023/02/01 Basic version
00.02 2023/12/07 Calculate real 3D values if parallel to coordinate axis
"""
__title__ = "TechDrawTools.CommandAxoLengthDimension"
__author__ = "edi"
__url__ = "https://www.freecad.org"
__version__ = "00.02"
__date__ = "2023/12/07"
from PySide.QtCore import QT_TRANSLATE_NOOP
import FreeCAD as App
import FreeCADGui as Gui
import TechDrawTools.TDToolsUtil as Utils
import TechDraw
import math
# A hack to deal with garbage in the low bits causing wrong decisions. dimensionLineAngle is in radians. If
# dimensionLineAngle is 90deg +/- AngularTolerance, we treat it as a vertical dimension line. This affects which
# side of the dimension line is used for the dimension text.
def makePlumb(dimensionLineAngle):
HalfPi = math.pi / 2.0
AngularTolerance = 0.01 # This value is a guess. It works for the file in issue #16172, but
# seems small (~0.5deg).
if math.isclose(dimensionLineAngle, HalfPi, abs_tol=AngularTolerance):
return HalfPi
elif math.isclose(dimensionLineAngle, -HalfPi, abs_tol=AngularTolerance):
return -HalfPie
return dimensionLineAngle
class CommandAxoLengthDimension:
"""Creates a 3D length dimension."""
def __init__(self):
"""Initialize variables for the command that must exist at all times."""
pass
def GetResources(self):
"""Return a dictionary with data that will be used by the button or menu item."""
return {'Pixmap': 'actions/TechDraw_AxoLengthDimension.svg',
'Accel': "",
'MenuText': QT_TRANSLATE_NOOP("TechDraw_AxoLengthDimension", "Axonometric Length Dimension"),
'ToolTip': QT_TRANSLATE_NOOP("TechDraw_AxoLengthDimension", "Creates a length dimension in with "
"axonometric view, using selected edges or vertex pairs to define direction and measurement")}
def Activated(self):
"""Run the following code when the command is activated (button press)."""
App.setActiveTransaction("Create axonometric length dimension")
vertexes = []
edges = []
if not Utils.getSelEdges(2):
return
edges = Utils.getSelEdges(2)
vertexes = Utils.getSelVertexes(0)
vertNames = list()
edgeNames = list()
if len(vertexes)<2:
vertexes.append(edges[0].Vertexes[0])
vertexes.append(edges[0].Vertexes[1])
edgeNames = Utils.getSelEdgeNames(2)
else:
vertNames = Utils.getSelVertexNames(2)
view = Utils.getSelView()
page = view.findParentPage()
scale = view.getScale()
StartPt, EndPt = edges[1].Vertexes[0].Point, edges[1].Vertexes[1].Point
extLineVec = EndPt.sub(StartPt)
StartPt, EndPt = edges[0].Vertexes[0].Point, edges[0].Vertexes[1].Point
dimLineVec = EndPt.sub(StartPt)
xAxis = App.Vector(1,0,0)
extAngle = math.degrees(extLineVec.getAngle(xAxis))
lineAngle = math.degrees(makePlumb(dimLineVec.getAngle(xAxis)))
if extLineVec.y < 0.0:
extAngle = 180-extAngle
if dimLineVec.y < 0.0:
lineAngle = 180-lineAngle
if abs(extAngle-lineAngle)>0.1:
# re issue: https://github.com/FreeCAD/FreeCAD/issues/13677
# Instead of using makeDistanceDim (which is meant for extent dimensions), we use the
# same steps as in CommandCreateDims.cpp to create a regular length dimension. This avoids
# the creation of CosmeticVertex objects to serve as dimension points. These CosmeticVertex
# objects are never deleted, but are no longer used once their dimension is deleted.
# distanceDim=TechDraw.makeDistanceDim(view,'Distance',vertexes[0].Point*scale,vertexes[1].Point*scale)
distanceDim = view.Document.addObject("TechDraw::DrawViewDimension", "Dimension")
distanceDim.Type = "Distance"
distanceDim.MeasureType = "Projected" #should this not be True?
self.setReferences(distanceDim, view, edgeNames, vertNames)
page.addView(distanceDim)
distanceDim.AngleOverride = True
distanceDim.LineAngle = lineAngle
distanceDim.ExtensionAngle = extAngle
distanceDim.recompute() # ensure linearPoints has been set
# as in CmdCreateDims::positionDimText:
linearPoints = distanceDim.getLinearPoints()
mid = (linearPoints[0] + linearPoints[1]) / 2
distanceDim.X = mid.x
distanceDim.Y = -mid.y
(px,py,pz) = Utils.getCoordinateVectors(view)
arrowTips = distanceDim.getArrowPositions()
value2D = (arrowTips[1].sub(arrowTips[0])).Length
value3D = 1.0
if px.isParallel(dimLineVec,0.1):
value3D = value2D/px.Length
elif py.isParallel(dimLineVec,0.1):
value3D = value2D/py.Length
elif pz.isParallel(dimLineVec,0.1):
value3D = value2D/pz.Length
if value3D != 1.0:
fomatted3DValue = self._formatValueToSpec(value3D,distanceDim.FormatSpec)
distanceDim.Arbitrary = True
distanceDim.Label = distanceDim.Label.replace('Dimension','Dimension3D')
distanceDim.FormatSpec = fomatted3DValue
distanceDim.recompute()
view.requestPaint()
Gui.Selection.clearSelection()
App.closeActiveTransaction()
view.touch() # make view claim its new child
def IsActive(self):
"""Return True when the command should be active or False when it should be disabled (greyed)."""
if App.ActiveDocument:
return Utils.havePage() and Utils.haveView()
else:
return False
def _formatValueToSpec(self, value, formatSpec):
'''Calculate value using "%.nf" or "%.nw" formatSpec'''
formatSpec = '{'+formatSpec+'}'
formatSpec = formatSpec.replace('%',':')
if formatSpec.find('w') > 0:
formatSpec = formatSpec.replace('w','f')
numDig = formatSpec.find(":.")
if numDig != -1:
numDig = numDig+2
charList = list(formatSpec)
digits = int(charList[numDig])
value = round(value,digits)
strValue = formatSpec.format(value)
strValueList = list(strValue)
while strValueList[-1] == '0':
strValueList.pop()
if strValueList[-1] == '.':
strValueList.pop()
return ''.join(strValueList)
else:
return formatSpec.format(value)
def setReferences(self, dimension, view, edgeNameList, vertexNameList):
references = list()
if vertexNameList:
for vert in vertexNameList:
references.append((view, vert))
else:
references.append((view, edgeNameList[0]))
dimension.References2D = references
#
# The command must be "registered" with a unique name by calling its class.
Gui.addCommand('TechDraw_AxoLengthDimension', CommandAxoLengthDimension())
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