rebar based on wire

[bernd]

attached some screen of a stirrup and a FreeCAD file. This rebar is based on a wire. But I could not found a GUI tool to make a rebar based on a Draft-Wire. Did I miss something?

Is there a Python method to make a Rebar out of a wire?

bernd

rebar-based-on-wire.FCStd

(13.96 KiB) Downloaded 30 times

screen4.jpg (175.28 KiB) Viewed 1601 times

[chakkree]

Is there a Python method to make a Rebar out of a wire?

I use pivy.coin to represent rebar shape. This code for create U-Shape rebar.

Rebar_PivyCoin_01.png (122.54 KiB) Viewed 1561 times

TestRebarPivy01.py

(3.87 KiB) Downloaded 23 times

Code: Select all

'''
  Test Create rebars by pivy.coin
  24 Apr 2019

  Version: 0.19.16502 (Git)
  Python version: 3.6.8
'''

import os
from pivy import coin
from math import sin,cos ,pi

def creteRebarU(dia = 12, A= 300, B=1000 , num = 1 , spacing = 100):
    Switch = coin.SoSwitch()
    Switch.whichChild = 1
    
    Group1 = coin.SoGroup()
    Switch.addChild(Group1)
    
    myNode = coin.SoSeparator()
    Group1.addChild(myNode)
    myNode.setName('RebarU1')
    material = coin.SoMaterial()    
    material.diffuseColor.setValue(0.667, 0.000,0.000)
    material.specularColor.setValue(1,1,1)
    rebar = coin.SoVRMLExtrusion()
    rebar.beginCap = True
    rebar.endCap = True
    
    n = 3*4
    r = dia/2.0
    points = []
    for i in range(0,n+1):
        x = r * cos(2*pi/n*i); y = r * sin(2*pi/n*i)
        points.append( coin.SbVec2f(  x   ,  y) )
    crossSection = coin.SoMFVec2f()
    crossSection.setValues(points)    
    rebar.crossSection=crossSection
    
    R = 2.0*dia
    points = []
    points.append( coin.SbVec3f(  0   ,  -B/2 , A) )
    points.append( coin.SbVec3f(  0   ,  -B/2 , R) )
    n = 6
    for i in range(0,n):
        dx = R * cos(pi/2/n*i); dy = R * sin(pi/2/n*i)
        x = -B/2 + R-dx ;  y = +R-dy
        points.append( coin.SbVec3f(  0   ,  x , y) )
    points.append( coin.SbVec3f(  0   ,  -B/2+R , 0) )
    points.append( coin.SbVec3f(  0   ,  +B/2-R , 0) )
    for i in range(0,n):
        dx = R * cos(pi/2/n*i); dy = R * sin(pi/2/n*i)
        x = +B/2-R + dy ;  y = +R-dx
        points.append( coin.SbVec3f(  0   ,  x , y) )
    points.append( coin.SbVec3f(  0   ,  +B/2 , R) )
    points.append( coin.SbVec3f(  0   ,  +B/2 , A) )
    rebar.spine.setValues(points )
    
    myNode.addChild(material)
    myNode.addChild(rebar)
    
    Group2 = coin.SoGroup()
    Switch.addChild(Group2)
    
    tr = coin.SoTransform()
    tr.translation.setValue(0,0,0)
    tr.rotation.setValue(0,0,1 , 0.00   )
    Group2.addChild(tr)
    array1 = coin.SoArray() 
    Group2.addChild(array1)
    array1.origin = 'CENTER'
    array1.numElements1 = num
    array1.separation1.setValue(spacing,0,0)
    array1.addChild(myNode)
    
    return Switch

if __name__=='__main__':
    B = 1500; L = B
    t = 300
    numRebar = 10
    dia = 12
    '''
    B = 5000; L = B
    t = 800
    numRebar = 48
    dia = 19
    '''
    
    
    covering = 50
    R = 2*dia
    spacing1 = (B-2*covering - dia - 2*R)/float(numRebar-1)
    
    rebarA = t-2*covering - dia
    rebarB  = B-2*covering - dia
    rebarSet1 = creteRebarU(A= rebarA , B=rebarB ,dia = dia, num=numRebar , spacing = spacing1)
    rebarSet2 = creteRebarU(A= rebarA-dia , B=rebarB ,dia = dia, num=numRebar , spacing = spacing1)
    
    
    
    footingSep = coin.SoSeparator()
    group1 = rebarSet1.getChildren()[1]
    tr = group1.getChildren()[0]
    tr.translation.setValue(0,0,covering+dia/2.0)
    
    group2 = rebarSet2.getChildren()[1]
    tr = group2.getChildren()[0]
    tr.translation.setValue(0,0,dia)
    tr.rotation.setValue(coin.SbRotation(coin.SbVec3f(0.0, 0.0, 1.0), pi/2.0))
    
    material = coin.SoMaterial()
    material.transparency.setValue(0.55)
    material.diffuseColor.setValue(0.000,0.667,1.000)
    tr = coin.SoTransform()
    tr.translation.setValue(0,0,+t/2)
    
    """
    concSep = coin.SoSeparator()
    concrete = coin.SoCube()
    concrete.width = L
    concrete.height=B
    concrete.depth = t
    concSep.addChild(material)
    concSep.addChild(tr)
    concSep.addChild(concrete)
    """
    
    #footingSep.addChild(concSep)
    footingSep.addChild(rebarSet1)
    footingSep.addChild(rebarSet2)
    
    
    sg = FreeCADGui.ActiveDocument.ActiveView.getSceneGraph()
    sg.addChild(footingSep)
    
    """
    filePath, fileName = os.path.split(__file__)
    out=coin.SoOutput()
    out.openFile(filePath+os.sep+'Rebar_U_temp.iv')
    wa = coin.SoWriteAction(out)
    wa.apply(footingSep)
    #wa.apply(rebarSet2)
    #wa.apply(concSep)
    out.closeFile()
    """
    
    Msg('Done!!\n\n')
    

[bernd]

Very interesting? Is there any specific reason for using pivy.coin for this ?

[bernd]

Code: Select all

import FreeCAD, Arch, Draft
myh = 3000

Structure = Arch.makeStructure(None, length=1000, width=1000, height=myh)
Structure.ViewObject.Transparency = 80
FreeCAD.ActiveDocument.recompute()

p1 = FreeCAD.Vector(0, 0, 0)
p2 = FreeCAD.Vector(0, 0, myh)
Wire1 = Draft.makeWire([p1, p2])
FreeCAD.ActiveDocument.recompute()

Rebar = Arch.makeRebar(Structure, Wire1, diameter=30, amount=1, offset=0)
FreeCAD.ActiveDocument.recompute()

[bernd]

But somehow it seams not possible to make rebar without a structure object? This should be possible IMHO.

[bernd]

But somehow it seams not possible to make rebar without a structure object? This should be possible IMHO.

it only needs a small change in rebar code. I my go for a PR.

[yorik]

But somehow it seams not possible to make rebar without a structure object? This should be possible IMHO.

I think you are right.. But indeed there is no real need, I think it would be easy to change

[chakkree]

When I use python macro to create rebar in all beam, it takes a long time to generate rebars, and it has a file's size about 5.05 MB.(Not included rebars in columns, footings, and slab)

Rebar_in_Home01.png (1011.33 KiB) Viewed 1502 times

[bernd]

I like the coin idea. Especially if I think of the reinforcement we do on work ... But I would not move all to coin. Might it be a good idea to leave the wire as a real shape and only make the solid a pivy.coin node. With this all rebar operation could be done with the wire, like material bill, place rebare against each other etc.

[ebrahim raeyat]

I like the coin idea. Especially if I think of the reinforcement we do on work ... But I would not move all to coin. Might it be a good idea to leave the wire as a real shape and only make the solid a pivy.coin node. With this all rebar operation could be done with the wire, like material bill, place rebare against each other etc.

It is good idea. we must set the wire shape default for rebars and if user want to view reality we can set a render option. because it is time consuming process for real structures.