Axis position

Helper

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On 24/03/2012 at 10:33, xxxxxxxx wrote:

axis are just a representation of the difference of local and global coordinates. and yes you will have
to use matrices

edit :

here is the main entry point to mess with local/global coordinates.

http://www.thirdpartyplugins.com/python/modules/c4d/C4DAtom/GeListNode/BaseList2D/BaseObject/index.html#c4d.BaseObject

Helper

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On 24/03/2012 at 11:18, xxxxxxxx wrote:

thank you littledevil for your answer
i know that axis are just a representation. to get this, i use usually

  
obj.GetMg().off

the problem is, if i change these coordinates, the object will move too, and i need to keep the object in the same postion.

Helper

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On 24/03/2012 at 14:00, xxxxxxxx wrote:

You can only move the axis for point object.
You first store the original points, move the object, then reset the points
to the original positions.
This command example moves the axis to the parent.

Cheers
Lennart

  
# MoveAxisOnly tcastudios©2012   
# Move the axis of a point object and keep points at original local(parent) position   
  
import c4d   
from c4d import Vector as v   
  
def main() :   
    if op is None or not op.CheckType(c4d.Opoint) : return False   
    oldm   = op.GetMg()   
    points = op.GetAllPoints()   
    pcount = op.GetPointCount()   
  
    doc.StartUndo()   
    doc.AddUndo(c4d.UNDOTYPE_CHANGE, op)   
    op.SetAbsRot(v(0))   
    op.SetAbsPos(v(0))   
    op.Message(c4d.MSG_UPDATE)   
  
    newm    = op.GetMg()   
  
    for p in xrange(pcount) :   
        op.SetPoint(p,~newm*oldm*points[p])   
  
    op.Message(c4d.MSG_UPDATE)   
    c4d.EventAdd()   
    doc.EndUndo()   
  
if __name__=='__main__':   
    main()

Helper

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On 25/03/2012 at 06:52, xxxxxxxx wrote:

i got the idea, thank you very much Lennart

Helper

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On 27/03/2012 at 07:25, xxxxxxxx wrote:

This one demonstrates a little other approach and is about 2 lines shorter than Lennarts version. Tongue

# coding:      ascii  
# file:        <scriptmanager>  
# description: Reset an object's position to the origin while its points keep  
#              their position globally.  
  
import c4d  
  
def main() :  
  if not op or not op.CheckType(c4d.Opoint) :  
      return  
  
  mg     = op.GetMg()  
  pcount = op.GetPointCount()  
  
  # tell c4d to encapsulate the following steps into a single  
  # undo step  
  doc.StartUndo()  
  
  for i in xrange(pcount) :  
      point = op.GetPoint(i)  
      doc.AddUndo(c4d.UNDOTYPE_CHANGE, op)  
      op.SetPoint(i, point * mg)  
  
  doc.AddUndo(c4d.UNDOTYPE_CHANGE, op)  
  op.SetAbsPos(c4d.Vector(0))  
  op.SetAbsRot(c4d.Vector(0))  
  op.Message(c4d.MSG_UPDATE)  
  
  # close the undo encapsulation and tell c4d to update the gui  
  doc.EndUndo()  
  c4d.EventAdd()  
  
main()

Cheers!
-Niklas

Helper

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On 27/03/2012 at 09:10, xxxxxxxx wrote:

Hi Niklas, put a timer in them and explore:)

Cheers
Lennart

Helper

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On 24/10/2012 at 08:01, xxxxxxxx wrote:

Hello ,

I tried to change your script to set the axis to the center of the bounding box with

#newm    = op.GetMg()   
newm    = op.GetMp()

but i get a float instead of vector error?

Traceback (most recent call last) :
File "'scriptmanager'", line 32, in <module>
File "'scriptmanager'", line 25, in main
TypeError: argument 2 must be c4d.Vector, not float

any ideas ?

kind regards mogh

Helper

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On 24/10/2012 at 11:21, xxxxxxxx wrote:

Possibly because GetMg() does not return a matrix, but a *Vector*.
Didn't check it, however.

Helper

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On 25/10/2012 at 00:21, xxxxxxxx wrote:

but

opt.SetMg(newm)

says it wants a vector ?

argument 2 must be c4d.Vector, not float

anyway how do i get a matrix from a single vector remaining the orientation.

I am sorry, math is not my profession ...

kind regards

Helper

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On 29/10/2012 at 01:52, xxxxxxxx wrote:

Code Vonc
has some interesting stuff - still getting nowhere

http://code.vonc.fr/?a=22

kind regards