Hi @bentraje,

Here is the code that can do:

import c4d

def AddLongDataType(obj):
    if obj is None: return

    bc = c4d.GetCustomDataTypeDefault(c4d.DTYPE_LONG) # Create default container
    bc[c4d.DESC_NAME] = "Test" # Rename the entry

    element = obj.AddUserData(bc) # Add userdata container
    obj[element] = 30 # Assign a value
    c4d.EventAdd() # Update

def main():
    obj = doc.GetActiveObject()    # Here you get selected/active object from scene
    AddLongDataType(obj)           # Call the AddLongDataType function to add user data to selected object

if __name__=='__main__':           # The "actual" place that code start to execute 
    main()                         # Call "main" function, start the processing

hi @passion3d,
There is no actual n-gon in the underlying layer of Cinema 4D.
Adjacent polygons use hidden edge to create n-gon-like shape(s).

Following code creates a 5-side polygon object:

import c4d, math
from c4d import utils
#Welcome to the world of Python

def main():
    pointCount = 5
    polygonCount = math.ceil(pointCount/4.0)                    # caculate minimum needed polygon number
    polyObj = c4d.BaseObject(c4d.Opolygon)                      # create an empty polygon object

    polyObj.ResizeObject(pcnt=pointCount, vcnt=polygonCount)    # resize object to have 5 points, 2 polygons

    # manually set all point position
    polyObj.SetPoint(id=0, pos=c4d.Vector(200,0,-200))
    polyObj.SetPoint(id=1, pos=c4d.Vector(-200,0,-200))
    polyObj.SetPoint(id=2, pos=c4d.Vector(-200,0,200))
    polyObj.SetPoint(id=3, pos=c4d.Vector(200,0,200))
    polyObj.SetPoint(id=4, pos=c4d.Vector(300,0,0))

    # associate points into polygons
    polygon0 = c4d.CPolygon(t_a=0, t_b=1, t_c=2, t_d=3)
    polygon1 = c4d.CPolygon(t_a=0, t_b=3, t_c=4)

    # set polygon in polygon object
    polyObj.SetPolygon(id=0, polygon=polygon0)
    polyObj.SetPolygon(id=1, polygon=polygon1)

    # set hidden edge
    nbr = utils.Neighbor()
    nbr.Init(op=polyObj, bs=None)                               # create Neighor counting all polygon in
    edge = c4d.BaseSelect()
    edge.Select(num=3)                                          # set selection, which is the id of the edge to be hidden
    polyObj.SetSelectedEdges(e=nbr, pSel=edge, ltype=c4d.EDGESELECTIONTYPE_HIDDEN)  # hide the edge

    polyObj.Message(c4d.MSG_UPDATE)

    doc.InsertObject(polyObj)

    c4d.EventAdd()

if __name__=='__main__':
    main()

Hi @ruckzuck ,

Please check this document:

c4d.utils.noise.C4DNoise

Here is a sample code:

import c4d
from c4d import utils
#Welcome to the world of Python

def main():
    
    pos = c4d.Vector(0,0,0) # Here is the input
    
    seed = 12346
    
    noiseGen = utils.noise.C4DNoise(seed)
    result = noiseGen.Noise(t=c4d.NOISE_NOISE,two_d=False,p=pos) # Here is the result
    
    print(result)

You can then remap result float number into a color using other methods.

Hi @pim,
As far as I know, there is no way to make a "perfect circle" with any type of spline in Cinema 4D.
I search on the Internet, based on this answer: How to create circle with Bézier curves?.
I write the following code to create a circular-like spline shape:

import c4d, math
#Welcome to the world of Python

deg = math.pi/180.0

def main():
    pCnt = 4             # Here is the point count
    radius = 200         # Here is the radius of circle
    subdAngle = 5*deg    # Here is the subdivision angle

    #Prepare the data
    tangentLength = (4/3)*math.tan(math.pi/(2*pCnt))*radius # single side tangent handle length
    pointPosLs = []
    tangentLs = []
    for i in range(0,pCnt):

        angle = i*(2*math.pi)/pCnt    # caculate the angle

        # caculate point position
        y = math.sin(angle)*radius
        x = math.cos(angle)*radius
        pointPosLs.append(c4d.Vector(x, y, 0))

        # tangent position
        lx = math.sin(angle)*tangentLength
        ly = -math.cos(angle)*tangentLength
        rx = -lx
        ry = -ly
        vl = c4d.Vector(lx, ly, 0)
        vr = c4d.Vector(rx, ry, 0)
        tangentLs.append([vl, vr])

    # init a bezier circle
    circle = c4d.SplineObject(pcnt=pCnt, type=c4d.SPLINETYPE_BEZIER)
    circle.ResizeObject(pcnt=pCnt, scnt=1)
    circle.SetSegment(id=0, cnt=pCnt, closed=True)
    circle[c4d.SPLINEOBJECT_CLOSED] = True
    circle[c4d.SPLINEOBJECT_ANGLE] = subdAngle
    
    circle.SetAllPoints(pointPosLs) # set point position

    # set tangent position
    for i in range(0, pCnt):
        circle.SetTangent(i, tangentLs[i][0], tangentLs[i][1])

    circle.Message(c4d.MSG_UPDATE)

    return circle

You can try put this code in a Python Generator object to get the result.

I'm not very sure about my answer, waiting for more convincing answers.

Hi @bonsak,
Try use op.GetObject().GetDeformCache().GetPointCount() in a Python Tag on the Polygon Object.
Here you can get more information: GetDeformCache().

It works like a charm!

Thanks a lot!

Hi,

How can I add a button to an object with python?

I'm trying to add a button to a Null Object, but only get a button userdata without button itself. Here is the code:

import c4d

def main():
    null_object = c4d.BaseObject(c4d.Onull)

    ud_btn_bc = c4d.GetCustomDatatypeDefault(c4d.DTYPE_BUTTON)
    ud_btn_bc.SetString(c4d.DESC_NAME, "Click")
    ud_btn_bc.SetString(c4d.DESC_SHORT_NAME, "click")
    null_object.AddUserData(ud_btn_bc)

    doc.InsertObject(null_object)
 
    c4d.EventAdd()

if __name__ == "__main__":
    main()

It seems that creating a button user data from GUI is different from Python. But I don't know how to do it correctly in Python.

Thanks!

Thank you @ferdinand for the detailed answer and code.
I will do more reading in the sdk document.

Thanks again @cairyn!
I will use the method your introduced, and keep this topic open, hoping someone could make this more clearly.

Thanks @cairyn! When i read c4d.IsCommandChecked(id), it says Forbidden to call in expressions (Python generator, tag, XPresso node, etc.). Is it safe to use this in a Interaction Tag?

Hi,

How can I get and set Move Tool's XYZ Axis Lock state? when I click the buttons, the Script Log display as:

c4d.CallCommand(12153) # X-Axis / Pitch
c4d.CallCommand(12154) # Y-Axis / Heading
c4d.CallCommand(12155) # Z-Axis / Bank

I append an Interaction Tag on a object, when I select this object, I want it automaticly change to Move Tool and lock the Y axis and Z axis,
when I deselect the object, it restore the original axis lock state, then change back to last active tool.

Here is the code I put in the tag:

import c4d
from c4d import gui

def onSelect():
    #Code for what happens when the object gets selected goes here
    global last_tool
    last_tool = doc.GetAction() # store the active tool
    
    c4d.CallCommand(c4d.ID_MODELING_MOVE) # change to Move Tool
    gui.ActiveObjectManager_SetObject( # change Attribute Manager to Object Mode
        c4d.ACTIVEOBJECTMODE_OBJECT, op, c4d.ACTIVEOBJECTMANAGER_SETOBJECTS_OPEN)

    # TODO: Get Move Tool current axis lock state, then change the state

def onDeselect():
    #Code for what happens when the object gets unselected goes here

    # TODO: Restore Move Tool's last axis lock state

    doc.SetAction(last_tool) # restore the last active tool

#def onHighlight():
    #Code for what happens when the object gets highlighted goes here

#def onUnhighlight():
    #Code for what happens when the object gets unhighlighted goes here

by the way, what is the difference between "onSelect" and "onHighlight"?

Thanks!

@s_bach thank you for your answer! I think I have the same question as mike do, so it has been solved now. Thank you again!

Hi, @m_adam

Thank you for your kindness and the inspiring answer! It's a GREAT Christmas present for me!

So sorry asking XPresso related questions in this forum.
The problem I faced is a little bit complex than this: I need sample Effectors' total Output Strengths in the position from a Polygon Object's Points, and store the result into a Vertex Color Map attached for further use.
This problem bothers me for months, and I didn't find any clue until your post. I have never think about using Python Node with global variable in XPresso Network can keep the data as I need and do the magic!

From the bottom of my heart, I want to say THANK YOU.
The answer you give not only solve this problem, but also inspire me re-thinking of ObjectList Node and Python Node, and how these nodes executed in an XPresso Network.

Just let me THANK YOU AGAIN!

Best wishes for you to have a wonderful holiday!

Hi,

I have a Null Object with an In-/Exclusion Userdata attached. In In-/Exclusion Userdata some Mograph Effector have been added. I want to use Sample Node to get all Strength of Mograph Effector, then add output Strength together. How can I do?

Here is the snapshot of the scene.

The problem I meet is that I can't use Python to sample the output of a Mograph Effector(Sample Node With Python), and I haven't found a way to cumulate output of an Object List Node.

Thanks!

Hi @r_gigante,
Thank you for replying. I'd like to know more about this topic: if I only know the Control Point Index from PointObject.GetPoint(id) of a spline, how could I get the Spline Position of this point?