Selected Keys? Move Keys?

Helper

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On 23/02/2011 at 14:33, xxxxxxxx wrote:

Trying my best to follow this. Not sitting idly by.
So far I can only get key values on one track.
And the selection of key seems to depend on the object selection, rather than just a key selection
Confused - but learning as I go. Thanks again to all

Helper

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On 23/02/2011 at 15:34, xxxxxxxx wrote:

Originally posted by xxxxxxxx

So far I can only get key values on one track.

Yes. The python example I posted only loops though all the keys on a single track using a for loop.
In order to get the keys on the other tracks. That for loop would need to be inside of a while loop to move on to the next track. which isn't that difficult to do.
The hard part is that you have to get the last key first as you loop through all of this stuff. Because if you move the first keys in order. They will end up on top of eachother. And the loop will fail.
Think of a train pulling it's cargo cars.

The code in Coffee to do that looks like this: for(i=curve->GetKeyCount()-1; i>=0 ; --i)
Which means. Start from the last key. Then work your way back every time the loop runs.
I don't know how to write that kind of loop in python yet.

Originally posted by xxxxxxxx

And the selection of key seems to depend on the object selection, rather than just a key selection
Confused - but learning as I go. Thanks again to all

Sort of. It's a case of Parent ->Child relationships.
The document is the parent of all objects. So to get at objects in python you write doc.GetActiveObject(). Where doc is the parent, and the selected object is the child.

The same rule goes for things attached to objects.
-Tracks are the children of objects.
--Curves are the children of tracks
---Keys are the children of curves.

So you almost never grab things directly in C4D. You get the parent. Then drill down into it's children until you reach the item you want to manipulate.
Hope that makes sense.

-ScottA

Edit* - I just found this with Google. Turns out it's not as hard to do a revese loop in python as I thought. In fact it's pretty darned simple:

    cnt = curve.GetKeyCount()  
  for i in reversed(xrange(cnt)) :  
   keys = curve.GetKey(i)  
   if keys.GetNBit(5) is 1: # If a key is selected             
    print keys.GetValue() #print the key's value

We'll get it working eventually deepshade.

Helper

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On 23/02/2011 at 21:09, xxxxxxxx wrote:

Uhm. just by the way: Why do we need a reversed loop ?

Helper

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On 23/02/2011 at 21:55, xxxxxxxx wrote:

Now, i got it all work. Only thing missing is the GetNBit, cause I have not enough Time now. I'll post the full code later on.
But a look in the SDK makes me think that CKeys doesn't have the function GetNBit because it's a method of the GeListNode Class.. ?

PS: Still don't understand why you used an Invers Iteration.

//edit:

So, here's the complete function:
Even with Undo-Functionality

def MoveSelectedKeys(op,offset,timeln = 1) :    # offset in frames  
  import c4d  
  
  if (not op) or (not offset) : return False  
  
  if timeln == 1: timeln = c4d.NBIT_TL1_SELECT  
  elif timeln == 2: timeln = c4d.NBIT_TL2_SELECT  
  elif timeln == 3: timeln = c4d.NBIT_TL3_SELECT  
  elif timeln == 4: timeln = c4d.NBIT_TL4_SELECT  
  else:  
      import math  
      timeln = math.fmod(timeln,4)  
      MoveSelectedKeys(op,offset,timeln)  
  
  doc = op.GetDocument()  
  doc.StartUndo()  
  
  track = op.GetFirstCTrack()  
  if not track: return False  
  
  fps = float(doc.GetFps())  
  
  while track:  
      curve = track.GetCurve()  
      cnt = curve.GetKeyCount()  
      for i in xrange(cnt) :  
          key = curve.GetKey(i)  
          if key.GetNBit(int(timeln)) == True:  
              tme = key.GetTime()  
              doc.AddUndo(c4d.UNDOTYPE_CHANGE,op)  
              key.SetTime(curve,c4d.BaseTime(offset/fps+tme.Get()))  
      track = track.GetNext()  
  doc.EndUndo()  
  c4d.EventAdd(c4d.MSG_UPDATE)  
  
  return True

Is there a bit for keys in the "usual" timeline ? This one does only affect the selected keys in the Manager .. Confused

Cheers, nux

Helper

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On 24/02/2011 at 07:56, xxxxxxxx wrote:

Good job nux.
I like how you implemented the other timeline windows.

I needed to use a reverse loop in Coffee because if I had for example: keys ten frames apart and an offset value of ten. The first key would get moved on top of the last key. Then when the loop came around a second time. The keys were all on the same frame and it couldn't figure out what to move.
I didn't know of any other way to do it.

Deepshade,
Just in case you don't know this. What nux posted is a method.
So if you want to use this in the python script manager. You paste it above the def main section.
Then call to the method like this:

  
def main() :  
  obj = doc.GetActiveObject()  
  offset = 15 #change this value as needed  
  MoveSelectedKeys(obj,offset,timeln = 1)   
  
if __name__=='__main__':  
  main()

-ScottA

Helper

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On 24/02/2011 at 08:34, xxxxxxxx wrote:

OMG - just dropped in for a look. Middle of some exhibition visual at present. Back this evening. Will have a good read later.

cheers all

Helper

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On 24/02/2011 at 08:34, xxxxxxxx wrote:

Let me add, that in the SkriptManager op is automatically the selected Object.
And you don't need to overload the timeln since you don't want timeline 2,3 or 4.
So this works too:

  
    
    
    import c4d  
    def main() :  
      offset = 15 #change this value as needed  
      MoveSelectedKeys(op,offset)   
      
    if __name__=='__main__':  
      main()

Helper

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On 25/02/2011 at 03:47, xxxxxxxx wrote:

Hi All

Sorry for lack of contribution - yesterdays work over ran
try to get back to this as soon as job is out of the door

Helper

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On 26/02/2011 at 02:07, xxxxxxxx wrote:

Hi all

Finally escaped from the last job.

A couple of things

1
Confusion
Just to confirm - the original concept was for staggered keys on multiple objects
Don't get me wrong - not complaining - just need to be clear what I'm seeing

The code is there in the while loop looks like it iterates through all the tracks of a single selected object.
If I select more than one object - nothing happens? (no provision in script so far)

2
I'd assume (if you want to modify keys differently for different objects) it would be better to write a small function
and modify the Key value before running Key.SetTime(...etc
dependent on the number of selected tracks
Sadly I cant see a way to return the count of selected tracks (yes Scott I now see the route) - so I guess
the whole things needs to run in an outer loop - iterating through the selected objects?

Another issue - if you modify the offset inside the While track loop
ie after
key.SetTime..
with something as simple as offset = offset + 10
Assuming you have a POS ROT SCALE tracks as well
Selecting all tracks is fine
Selecting just one track ie POS - inserts two extra sets of keyframes
as the while loop count is based on the total number of tracks
Cant see a simple solution

3
can't find reference to
C4d.NBIT_TL1_SELECT in the SDK - I take it these refer to the 4 timelines
Where did you get that info pls?

def MoveSelectedKeys(op,offset,timeln = 1) :    # offset in frames
    import c4d
  
    if (not op) or (not offset) : return False
  
    if timeln == 1: timeln = c4d.NBIT_TL1_SELECT
    elif timeln == 2: timeln = c4d.NBIT_TL2_SELECT
    elif timeln == 3: timeln = c4d.NBIT_TL3_SELECT
    elif timeln == 4: timeln = c4d.NBIT_TL4_SELECT
    else:
        import math
        timeln = math.fmod(timeln,4)
        MoveSelectedKeys(op,offset,timeln)
  
    doc = op.GetDocument()
    doc.StartUndo()
  
    track = op.GetFirstCTrack()
    if not track: return False
  
    fps = float(doc.GetFps())
  
    while track:
        curve = track.GetCurve()
        cnt = curve.GetKeyCount()
        for i in xrange(cnt) :
            key = curve.GetKey(i)
            if key.GetNBit(int(timeln)) == True:
                tme = key.GetTime()
                doc.AddUndo(c4d.UNDOTYPE_CHANGE,op)
                key.SetTime(curve,c4d.BaseTime(offset/fps+tme.Get()))
        track = track.GetNext()
    doc.EndUndo()
    c4d.EventAdd(c4d.MSG_UPDATE)
  
    return True
  
  
import c4d
def main() :
    offset = 50 #change this value as needed
    MoveSelectedKeys(op,offset) 
  
if __name__=='__main__':
    main()

Helper

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On 26/02/2011 at 03:06, xxxxxxxx wrote:

1:
You can simply use the function in an iteration through the selected objects.

What means staggered ? Don't know the word ^^

2:
Why modifieng the
key value ? I thought it's about moving keys ?
And what do you want to achieve with offset = offset + 10

Don't select a track, select the keys.

3:
It's in the GetNBits() function. Search for it without the c4d. in front.

I'll can answer your questions better later when im at home in about 2 hours.
Till then,

cheers

Helper

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On 26/02/2011 at 04:32, xxxxxxxx wrote:

What means staggered ? Don't know the word ^^

All explained here
http://forums.cgsociety.org/showthread.php?f=182&t=959094
with sample file (first post)

file shows example of before and after stagger

hth

Helper

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On 26/02/2011 at 05:23, xxxxxxxx wrote:

Ah, you mean the 2nd Cube should start moving when the 1st one finished ?
That shouldn't be a problem.
I'll be back in a minute with a function doing this.

cheers

PS: Do still only the selected keys need to be moved ?

//So, this is a bit more complex than i thought.
But it works fine

import c4d  
from c4d import documents  
  
overlap = 20    ## Change this to the Frame you want to let the keys beeing overlapped  
  
def MoveSelectedKeys(op,offset,timeln = 1) :    # offset in frames  
  import c4d  
  
  if (not op) or (not offset) : return False  
  
  if timeln == 1: timeln = c4d.NBIT_TL1_SELECT  
  elif timeln == 2: timeln = c4d.NBIT_TL2_SELECT  
  elif timeln == 3: timeln = c4d.NBIT_TL3_SELECT  
  elif timeln == 4: timeln = c4d.NBIT_TL4_SELECT  
  else:  
      import math  
      timeln = math.fmod(timeln,4)  
      MoveSelectedKeys(op,offset,timeln)  
  
  doc = op.GetDocument()  
  
  track = op.GetFirstCTrack()  
  if not track: return False  
  
  fps = float(doc.GetFps())  
  
  while track:  
      curve = track.GetCurve()  
      cnt = curve.GetKeyCount()  
      for i in xrange(cnt) :  
          key = curve.GetKey(i)  
          if key.GetNBit(int(timeln)) == True:  
              tme = key.GetTime()  
              key.SetTime(curve,c4d.BaseTime(offset/fps+tme.Get()))  
      track = track.GetNext()  
  c4d.EventAdd(c4d.MSG_UPDATE)  
  
  return True  
  
def GetLastSelectedKey(track, timeln = 1) :  
  import c4d  
  
  if timeln == 1: timeln = c4d.NBIT_TL1_SELECT  
  elif timeln == 2: timeln = c4d.NBIT_TL2_SELECT  
  elif timeln == 3: timeln = c4d.NBIT_TL3_SELECT  
  elif timeln == 4: timeln = c4d.NBIT_TL4_SELECT  
  else:  
      import math  
      timeln = math.fmod(timeln,4)  
      MoveSelectedKeys(op,offset,timeln)  
  
  curve = track.GetCurve()  
  cnt = curve.GetKeyCount()  
  
  for i in xrange(cnt) :  
      key = curve.GetKey(cnt-i-1)  
      if key.GetNBit(int(timeln)) == True:  
          return key  
  
def GetHNext(op) :  
  if not op: return  
  if op.GetDown() : return op.GetDown()  
  while not op.GetNext() and op.GetUp() :  
      op = op.GetUp()  
  return op.GetNext()  
  
def GetActiveObjects(doc) :  
  import c4d  
  lst = list()  
  op = doc.GetFirstObject()  
  while op:  
      if op.GetBit(c4d.BIT_ACTIVE) == True: lst.append(op)  
      op = GetHNext(op)  
  return lst  
  
  
def main() :  
  doc = documents.GetActiveDocument()  
  doc.StartUndo()  
  
  lst = GetActiveObjects(doc)  
  op = lst[0]  
  if not op: return False  
  
  key = GetLastSelectedKey(op.GetFirstCTrack())  
  if not key: offset = 0  
  else: offset = key.GetTime().GetFrame(doc.GetFps())-overlap  
  
  
  for i in xrange(len(lst)) :  
      doc.AddUndo(c4d.UNDOTYPE_CHANGE,op)  
      MoveSelectedKeys(op,offset)  
      key = GetLastSelectedKey(op.GetFirstCTrack())  
      if not key: offset = 0  
      else: offset = key.GetTime().GetFrame(doc.GetFps())-overlap  
      print op.GetName()  
      op = lst[i+1]  
  doc.EndUndo()  
  
  
  
if __name__=='__main__':  
  main()

Here a tiny Screencast to show you how to use it:

" target="_blank" rel="noopener noreferrer nofollow ugc">

Helper

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On 26/02/2011 at 12:08, xxxxxxxx wrote:

Hey Nux95

This is just great

And there's so much useful stuff here for reference
It's really appreciated - many thanks

line 103
op=list[i+1]
is throwing an error
index out of range

I guess this is just incrementing one object too many? at the end of the selected objects

Not wanting to take anything away from what you've done here - far beyond the call of duty
I think it would be nice to have the 'processing' part of the script possibly
in a function

ie release a collection of key manipulating scripts - by just changing the function

stagger - by offset - as we have now
stagger - by total time - total time over which to stagger all frames
stagger exponentially large to small
stagger exponentially small to large
etc etc

cheers again

Helper

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On 26/02/2011 at 13:22, xxxxxxxx wrote:

Originally posted by xxxxxxxx

line 103
op=list[i+1]
is throwing an error
index out of range

Do you recieve that message every time ? It didn't appear when I was using the Script.

I guess this is just incrementing one object too many? at the end of the selected objects

Shouldnt. 'op' is already the object with index 0, and 'i' starts with '0', so the next object for 'op' in the first iteration should be 1 => 'i+1'
But .. Hm, very bizarre. I didn't recieve that error, but as I think about it, that error MUST occure at the end of the loop.
Try it like this and tell me if the problen still exists:

  
op = lst[i+1]   
if not op: break # Hopefully there is a 'break' expression for 'for'-loops. If not try something that stops the loop

stagger - by total time - total time over which to stagger all frames
stagger exponentially large to small
stagger exponentially small to large
etc etc

Why not writing a Plugin ?

cheers, nux

Helper

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On 27/02/2011 at 03:10, xxxxxxxx wrote:

Using

if i+1 < len(lst) :
	op = lst[i+1]

got rid of the index error

As far as writing a plugin. A bit beyond me at present, probably best to learn from your foundation work here Nux.

Helper

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On 27/02/2011 at 08:05, xxxxxxxx wrote:

Trying to move this on in a more modular way
ie have a function for each transformation on selected keys

just wondered if I was heading in the right direction???
(ignore print checkpoints just for testing)

Next objective to 'nudge' everything back
as 'everything' gets moved over by staggering process
ie first track shouldnt move - everything else - stagger

#####################################
Updated version in later post

Helper

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On 01/03/2011 at 00:42, xxxxxxxx wrote:

Making an effort to understand what I'm seeing

Line 14 function call within itself - seems incorrect?

MoveSelectedKeys(op,offset,timeln)

Helper

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On 01/03/2011 at 07:21, xxxxxxxx wrote:

I am sorry, I may can go to my pc this weekend, but not earlier.

Does the Console tell you this ? O.o

If A function calls itself, everything starts again. But you may have changed some values before. (Here the timeln variable)

Helper

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On 02/03/2011 at 01:03, xxxxxxxx wrote:

Can anyone tell me why this message
doesn't pop up if NO object is selected using the function from the code above?

lst = GetActiveObjects(doc)
   op = lst[0]
   if not op:
   gui.MessageDialog("No objects selected")
   return False #leave the script if not an object

Helper

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On 02/03/2011 at 02:37, xxxxxxxx wrote:

Dunnoo .. Gonna test this this weekend. Maybe it's because op = lst[0] ist not in the right column ?

  lst = GetActiveObjects(doc)
  op = lst[0] ## here
    if not op:
        gui.MessageDialog("No objects selected") 
        return False #leave the script if not an object