Rotate a line along a circle path using Revit API

REDO10 · May 18, 2023, 9:00pm

Hi All,
I want to rotate a vertical line (curve) along a circle based on a computed rotation angle (counted lines = 158) and I’m stuck how to define the rotation function according to this code: Rotate Method, please check below a part of my code:

# curve to rotate
curv = IN[0][0].ToRevitType()
# circle defining path rotation
out_path = IN[0][1].ToRevitType()
spacing = IN[1]/0.3048
# computing rotation angle
def rebar_rotation(circle, space):
    sweepAngle = (space * 360) / (circle.Radius *  2 * math.pi)
    return sweepAngle
angle = rebar_rotation(out_path, spacing)
# angle count around 360°
count = int(math.ceil(360/angle))

for i in range(0, count):   
    a= i*angle
    # I'm stuck to define the rotation function
    rebar_curve = curv.Rotate(Line.CreateBound(XYZ(0,0,0), XYZ(0,0,1)), a)

rotation

Thanks in advance for your help.

Alien · May 18, 2023, 9:31pm

import sys
import clr
clr.AddReference('ProtoGeometry')
from Autodesk.DesignScript.Geometry import *
import math

# curve to rotate
curv = IN[0]
# circle defining path rotation
out_path = IN[1]
spacing = 10

# computing rotation angle
def rebar_rotation(circle, space):
    sweepAngle = (space * 360) / (circle.Radius *  2 * math.pi)
    return sweepAngle
    
angle = rebar_rotation(out_path, spacing)
# angle count around 360°
count = int(math.ceil(360/angle))

rebar_curve = []
for i in range(0, count):   
    a = i * angle    
    rebar_curve.append(curv.Rotate(Point.ByCoordinates(0, 0, 0), Vector.ZAxis(), a))
 
OUT = rebar_curve

Like that?

REDO10 · May 18, 2023, 10:04pm

@Alien

As I said above, I want to do the rotation using Revit API not using ProtoGeometry

Thanks.

Alien · May 18, 2023, 10:22pm

import sys
import clr
import math

# curve to rotate
curve = IN[0]
# circle defining path rotation
out_path = IN[1]
spacing = 10
plane = IN[2]

# computing rotation angle
def rebar_rotation(circle, space):
    sweepAngle = (space * 360) / (circle.Radius *  2 * math.pi)
    return sweepAngle
    
angle = rebar_rotation(out_path, spacing)
# angle count around 360°
count = int(math.ceil(360/angle))


rebar_curve = []
for i in range (count):   
	a = i * angle   
	rebar_curve.append(curve.Rotate(plane, a))    
 
OUT = rebar_curve

You mean more like this?

REDO10 · May 18, 2023, 10:54pm

@Alien
Thanks for your reply but as I said I want that everything will be done using Revit API according the method I linked above.
Thanks.

jacob.small · May 18, 2023, 11:35pm

Full code and a sample showing the given input instead of 9 lines of a clearly much larger data set would help quite a bit…

I suggest you look into this method of the curve class: CreateTransformed Method

REDO10 · May 19, 2023, 11:03am

Hi @jacob.small ,

1- I tried rotation using CreateTransformed Method but I got a syntax error and I dont know it’s due to what?

Please check my references below:

1st script: Dynamo curves

import sys
import clr
import math
clr.AddReference('ProtoGeometry')
from Autodesk.DesignScript.Geometry import *

clr.AddReference('RevitNodes')
import Revit
from Revit.Elements import Element

element = IN[0]
cover = IN[1]
rebar_type = IN[2]
spacing = IN[3]

geo = element.Geometry()
surfaces = geo[0].Explode()

s_area = []

for i in surfaces:
    s_area.append(i.Area)
    
S_area = ["%0.2f"%(round(i,2)) for i in s_area]
    
surf = []
surf_area = set()

for s, a in zip(surfaces, S_area):
    if a not in surf_area and S_area.count(a) == 2:
        surf.append(s)
        surf_area.add(a)
        

out_V_crv = surf[1].GetIsoline(0, 1).Explode()[0]
out_direct = out_V_crv.Direction

if out_direct.Z > 0 :
    out_V_crv = out_V_crv
else:
    out_V_crv = out_V_crv.reverse()
    
vect = out_direct.Cross(Vector.ByCoordinates(0,1,0))  
out_V_rebar = out_V_crv.Translate(vect, cover)

overlap_length = rebar_type.GetParameterValueByName("Diamètre de barre")*50/1000
out_V_rebar = out_V_rebar.ExtendEnd(overlap_length)

out_path = surf[1].GetIsoline(1, 0).Explode()[0]
out_path = out_path.Offset(-cover)

2nd script: rotation with Transformed Method

import sys
import clr
import math
import System

from System.Collections.Generic import IList, List 

clr.AddReference('RevitAPI')
import Autodesk
from Autodesk.Revit.DB import *
from Autodesk.Revit.DB.Structure import *

clr.AddReference('RevitNodes')
import Revit
clr.ImportExtensions(Revit.GeometryConversion)

clr.AddReference('RevitServices')
import RevitServices
from RevitServices.Persistence import DocumentManager
from RevitServices.Transactions import TransactionManager

doc = DocumentManager.Instance.CurrentDBDocument

curv = IN[0][0].ToRevitType()
out_path = IN[0][1].ToRevitType()
cover = IN[1]/0.3048
rebar_type = UnwrapElement(IN[2])
Hook_type = UnwrapElement(IN[3])
host= UnwrapElement(IN[4])
spacing = IN[5]/0.3048

# compute the angle rotation
def rebar_rotation(circle, space):
    sweepAngle = (space * 360) / (circle.Radius *  2 * math.pi)
    return sweepAngle

angle = rebar_rotation(out_path, spacing)

# rotated rebars count
count = int(math.ceil(360/angle))

rebars = []


for i in range(0, count):   
    a= i*angle
    rot = Transform.CreateRotation(XYZ.BasisZ, a*math.2*pi/360)
    rebar_curve = curv.CreateTransformed(rot)
    rebars.append(rebar_curve)
    
OUT = rebars

rot_curve.dyn (14.9 KB)
Shaft_rebar.rvt (3.4 MB)

Thanks.

christian.stan · May 19, 2023, 1:40pm

Hello, I tried but it seems that Class Location is only done for cf support elements. example

wal=UnwrapElement(IN[0])
pos=wal.Location
vec_Z=XYZ(0,0,1)
Line_Revit=Line.CreateBound(XYZ(5/0.3048,0,0),XYZ(5/0.3048,0,5/0.3048))
container=[]
test=Line_Revit.IsReadOnly
TransactionManager.Instance.EnsureInTransaction(doc)
res_move=pos.Move(XYZ(1/0.3048,0,0))
deb=pos.Curve.GetEndPoint(0)
res_rotate=pos.Rotate(Line.CreateBound(deb,XYZ(deb.X,deb.Y,(deb.Z)+1)),2*30*math.pi/360)
TransactionManager.Instance.TransactionTaskDone()
OUT = pos,res_move,res_rotate

Do not forget to place this in a transaction
Cordially
christian.stan

REDO10 · May 19, 2023, 2:22pm

Hi @christian.stan

I’ve a line to rotate not a wall (they have the same class method?)

should I use Multiply Method after the first rotation by CreateRotation Method to generate all rotated curves?

Thanks.

christian.stan · May 19, 2023, 3:49pm

As the expression says: there are always plenty of roads that lead to Rome
Let’s say that for these parts (and many others) the dynamo nodes largely do the job (there is no point in reinventing the wheel) it already turns well

Pt_revit=IN[0].ToRevitType()

def li(pdeb,ray,elev,angle):
    return Line.CreateBound(XYZ(pdeb.X+ray/0.3048*math.cos(angle*math.pi/180),pdeb.Y+ray/0.3048*math.sin(angle*math.pi/180),pdeb.Z),XYZ(pdeb.X+ray/0.3048*math.cos(angle*math.pi/180),pdeb.Y+ray/0.3048*math.sin(angle*math.pi/180),pdeb.Z+elev/0.3048)).ToProtoType()
    
curv=[li(Pt_revit,12,3,i) for i in range(0,285,15)]

OUT = curv

Have a good day

Cordially
christian.stan

REDO10 · May 19, 2023, 5:59pm

@christian.stan

Pfff!!!..somtimes a stupid mistake costs you all day!!

I discoverd my error :
error

and I corrected it by this line and the rotation by CreateTransformed Method works perfectly!

rot = Transform.CreateRotation(XYZ.BasisZ, a*2*math.pi/360)

Asyou said : there are always plenty of roads that lead to Rome

Sorry, I dont understand what pdeb, ray means in your function?

Thanks.

christian.stan · May 19, 2023, 6:26pm

pdeb I should have called it p_center of the circle (but that’s my starting point of everything)
and the ray as the radius of the line scan circle

to err is human, it is better to make a syntax error (normally not at all, but hey… nobody’s perfect End of the day philosophy: I’m done) than understanding, it takes less time to process

happy evening
cordially
christian.stan

Alien · May 19, 2023, 6:30pm

OK, could be because I’ve been off work sick with Covid all week…

But I found that hilarious.

christian.stan · May 19, 2023, 6:33pm

start off topic:
a pure malt whiskey of +15 years that overcomes everything
cheers
end Off topic: cordially
christian.stan

REDO10 · May 19, 2023, 6:36pm

@Alien

it doesn’t matter!!!..I made you work your brain

Thanks.

christian.stan · May 21, 2023, 3:03pm

Hello, Slight off topic more knowledge sharing found
the LocationCurve class is really nice (translate rotate and scale)
here is an example

wal=UnwrapElement(IN[0])
pos=wal.Location
newpos=Line.CreateBound(XYZ(0,0,0),XYZ(6/0.3048,1/0.3048,0))
TransactionManager.Instance.EnsureInTransaction(doc)
pos.Curve=newpos
TransactionManager.Instance.TransactionTaskDone()
OUT = pos,newpos

Cordially
christian.stan

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Rotate a line along a circle path using Revit API

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