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prismatic.py
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prismatic.py
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# -*- coding: utf-8 -*-
###################################################################################
#
# Copyright 2021 Jose Gabriel Egas Ortuno
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
# MA 02110-1301, USA.
#
#
###################################################################################
import FreeCAD
import Draft
'''
joint: <label>,
in line,
<node 1>,
<relative line position>,
<relative orientation>,
<node 2>,
[ offset, <relative offset> ];#Still don't get this, jut used 0,0,0
<node 2> (or the point offset by <relative offset>) is constrained on the straight line fixed to <node 1>
that goes through <relative line position> and is parallel to the z-direction defined by <relative orientation>.
'''
class Prismatic:
def __init__(self, obj, label, node1, node2):
x = node1.position_X
y = node1.position_Y
z = node1.position_Z
obj.addExtension("App::GroupExtensionPython", self)
#Create scripted object:
obj.addProperty("App::PropertyString","label","In line joint","label",1).label = label
obj.addProperty("App::PropertyString","joint","In line joint","joint",1).joint = 'prismatic'
obj.addProperty("App::PropertyString","node 1","In line joint","node 1",1).node_1 = node1.label
obj.addProperty("App::PropertyString","node 2","In line joint","node 2",1).node_2 = node2.label
#Absolute position at the node 1 position, only for animation, not for MBDyn sumulation:
obj.addProperty("App::PropertyDistance","position X","Initial absolute position","position X",1).position_X = x
obj.addProperty("App::PropertyDistance","position Y","Initial absolute position","position Y",1).position_Y = y
obj.addProperty("App::PropertyDistance","position Z","Initial absolute position","position Z",1).position_Z = z
obj.addProperty("App::PropertyString","animate","Animation","animate").animate = 'false'
obj.addProperty("App::PropertyString","frame","Animation","frame").frame = 'local'
obj.addProperty("App::PropertyString","structural dummy","Animation","structural dummy").structural_dummy = '2'
obj.addProperty("App::PropertyString","force vector multiplier","Animation","force vector multiplier").force_vector_multiplier = '1'
obj.Proxy = self
length = FreeCAD.ActiveDocument.getObjectsByLabel("x: structural: " + node1.label)[0].Length.Value # Calculate the body characteristic length. Will be used to size the arrows that represent the node.
p1 = FreeCAD.Vector(0, 0, 0)
#Add x vector of the coordinate system:
p2 = FreeCAD.Vector(length, 0, 0)
l = Draft.makeLine(p1, p2)
l.Label = 'x: joint: '+ label
l.ViewObject.LineColor = (1.00,0.00,0.00)
l.ViewObject.PointColor = (1.00,0.00,0.00)
l.Placement=FreeCAD.Placement(FreeCAD.Vector(x,y,z), FreeCAD.Rotation(FreeCAD.Vector(0,0,1),0), FreeCAD.Vector(0,0,0))
l.ViewObject.EndArrow = True
l.ViewObject.ArrowType = u"Arrow"
l.ViewObject.LineWidth = 1.00
l.ViewObject.PointSize = 1.00
l.ViewObject.ArrowSize = str(length/15)+' mm'
l.ViewObject.Selectable = False
#Add y vector of the coordinate system:
p2 = FreeCAD.Vector(0, length, 0)
l = Draft.makeLine(p1, p2)
l.Label = 'y: joint: '+ label
l.ViewObject.LineColor = (0.00,1.00,0.00)
l.ViewObject.PointColor = (0.00,1.00,0.00)
l.Placement=FreeCAD.Placement(FreeCAD.Vector(x,y,z), FreeCAD.Rotation(FreeCAD.Vector(0,0,1),0), FreeCAD.Vector(0,0,0))
l.ViewObject.EndArrow = True
l.ViewObject.ArrowType = u"Arrow"
l.ViewObject.LineWidth = 1.00
l.ViewObject.PointSize = 1.00
l.ViewObject.ArrowSize = str(length/15)+' mm'
l.ViewObject.Selectable = False
#Add z vector of the coordinate system:
p2 = FreeCAD.Vector(0, 0, length)
l = Draft.makeLine(p1, p2)
l.Label = 'z: joint: '+ label
l.ViewObject.ArrowType = u"Arrow"
l.ViewObject.LineColor = (0.00,0.00,1.00)
l.ViewObject.PointColor = (0.00,0.00,1.00)
l.Placement=FreeCAD.Placement(FreeCAD.Vector(x,y,z), FreeCAD.Rotation(FreeCAD.Vector(0,0,1),0), FreeCAD.Vector(0,0,0))
l.ViewObject.EndArrow = True
l.ViewObject.LineWidth = 1.00
l.ViewObject.PointSize = 1.00
l.ViewObject.ArrowSize = str(length/15)+' mm'
l.ViewObject.Selectable = False
#Add the vector to visualize reaction forces
Llength = FreeCAD.Units.Quantity(FreeCAD.ActiveDocument.getObjectsByLabel("X")[0].End[0]/4,FreeCAD.Units.Unit('mm'))
p1 = FreeCAD.Vector(x, y, z)
p2 = FreeCAD.Vector(x+Llength, y+Llength, z+Llength)
d = Draft.makeLine(p1, p2)
d.ViewObject.LineColor = (1.00,0.00,0.00)
d.ViewObject.PointColor = (1.00,0.00,0.00)
d.ViewObject.LineWidth = 1.00
d.ViewObject.PointSize = 1.00
d.ViewObject.EndArrow = True
d.ViewObject.ArrowType = u"Arrow"
d.ViewObject.ArrowSize = str(Llength/75)#+' mm'
d.ViewObject.Selectable = False
d.Label = "jf: "+ label
FreeCAD.ActiveDocument.recompute()
def execute(self, fp):
'''Do something when doing a recomputation, this method is mandatory'''
FreeCAD.Console.PrintMessage("Recompute...\n")