jed

An XP version is probably going to be non dynamic.
 
Here's a Python sim -
 

 
if you want the sphere to roll, you'll need Roll It or equivalent
 
sph2.c4d
 
Roll-It 2020 EN – eggtion.net 

Rad and bounding box work a bit differently -
 
rad returns size along object x, y, z (result doesn't change when obj rotates)
 
bounding box returns size along scene axis (result changes when obj rotates)
 
here top is the parent null containing 3 objects
 
import c4d from c4d import utils def main(): global x, y, z mg = top.GetMg() result = utils.GetBBox(top, mg) # returns 2 vector tuple >> center position and radius of bounding box radius = result[1] x = radius.x * 2.0 y = radius.y * 2.0 z = radius.z * 2.0  
 
bounding box 3 objects.c4d
 
Bounding Box position can sometimes give the 'wrong' result.

Sort of - but it's a bit flaky. You can use the standard hierarchy path to go up/down etc using a reference node.
 

 
I just used D to go down one level from sphere to figure, then similar XP as the radius to control the figure height. I tried using scale, but it exploded.
 
Object Disappearance_0002.c4d

Was it this
 

 
Divider_demo_scene.c4d
 
Divider plugin.zip

A bit like this 😀
 
py_balloons.c4d

Use 2 tags.

XPresso method
 
rotor.c4d

Here's a compare node set to >=. It gives a 1 or True when frame is >= 30.
 

Here's a compare node set to >=. It gives a 1 or True when frame is >= 30.
 

Here's a compare node set to >=. It gives a 1 or True when frame is >= 30.
 

Try this
 
show.c4d

I think this does it
 
def main(): global Output1 # n is number of mats for a in range(n): if Input1 >= Input2 * a and Input1 < Input2 * (a + 1): Output1 = a  

Here I used xpresso to rotate the lower object and dynamics to push the rest
 

 
 
pump 4.c4d

Writing to user data and reading it back is one way to store and increment a value, although there's sometimes a 1F delay in reading it back. 
 
Since you know coding, why not use a python node, something like
 
import c4d #Welcome to the world of Python def main(): global x frame = doc.GetTime().GetFrame(doc.GetFps()) # get current frame if frame == 0: x = 50 # start value else: if Input1: # bool input x += 1  
This is evaluated every frame, but will increment when you click in the viewport - which is annoying. The fix is to check Frame Dependent so only calculates on new frame. 

If you keyframe dynamic off the objects return to start position in 'transition time'.
 

 
https://www.dropbox.com/s/686bd38ap4npqiv/rocks3.c4d?dl=1

Baking the scene seems to fix the lag. Spline dynamics can be left on default.
 

You were trying to extrude along the spline instead of at right angles, creating overlap
 

 
extrude is x y z, you used z but should have used x
 

Try GetRad()
 
getrad.c4d

Assuming you're using Noseman's method of getting the text from the name, it's possible if you use python zfill and make the cloner editable -
 

 
import c4d #Welcome to the world of Python def main(): global Output1 Output1 = Input1.zfill(3)  
zfill pads a string with zeros up to the max character count in brackets.
 
zfill.c4d
 
Noseman's method - Generating Number Sequences Using MoGraph in Cinema 4D - YouTube

I put the sweeping in the iteration
 
xpresso_setup_issue_0001.c4d

You could point the oar at a null moving on a circle - align to spline. On R20 AFAIK align can't go past 100%, so I used modulo 1. Later versions don't need the modulo node.
 
rowing_0001.c4d
 

You could point the oar at a null moving on a circle - align to spline. On R20 AFAIK align can't go past 100%, so I used modulo 1. Later versions don't need the modulo node.
 
rowing_0001.c4d
 

My (expandable) python solution -
 
sensors under a null, using hierarchy + a ref node (down)
same in Python GetDown() = down
 
lister is an empty list where 0 = target not hit, 1 = target hit
 
for loop iterates through the cloners and if a target is hit, puts a 1 in the relevant place in lister
 
now test if there's a 1 anywhere in lister > light up cursor thing
 
py 1.c4d

Here's a workaround. I used GetTags() and specified which tag I wanted.
 
Here I set a cone as the parent of the cube. I just dragged the fields into the window and did some editing. Some fields seem to have numerical names.
 
def main(): obj = doc.SearchObject('Cube') obj2 = doc.SearchObject('Cone') tag = obj.GetTags()[0] # assuming constraint is 1st tag tag[c4d.ID_CA_CONSTRAINT_TAG_PARENT] = 1 # enable parent tag[30001] = obj2 # Cone is parent  
there's probably a correct way to do this 😀

I think there's a couple of tex missing
 
lamp.zip