If anyone interested:

def MatrixBlend(mxA, mxB, t):
    quatA = c4d.Quaternion()
    quatA.SetMatrix(mxA)

    quatB = c4d.Quaternion()
    quatB.SetMatrix(mxB)

    return utils.MatrixMove( utils.MixVec(mxA.off, mxB.off, t) ) * utils.QSlerp(quatA, quatB, t).GetMatrix() * utils.MatrixScale( utils.MixVec(mxA.GetScale(), mxB.GetScale(), t) )

Hi @m_adam ,

Adding Touch() is removing visibility of original object, but dynamics stop to work on children after that

BTW, your code throw error:

in GetVirtualObjects
    hierarchy_clone = op.GetAndCheckHierarchyClone(hierarchyhelp, orig, c4d.HIERARCHYCLONEFLAGS_ASPOLY, True, trans)
TypeError: an integer is required

Scene file test_generator.c4d
Generator plugin test_generator.zip

I found it's because of OBJECT_INPUT flag. Single OBJECT_GENERATOR flag is allowing children to have dynamics...

However original objects are observable in the viewport for a fraction of the second every frame update.
Also Make Editable and Current State to Object applied to the generator contains generated + original objects in the null.

How to get same experience as built-in generators, where no source objects are visible, and children dynamics is supported?

Hi,

I'm developing generator plugin over child polygon objects.

It works good with GetAndCheckHierarchyClone + CurrentStateToObjectCommand which might have regular deformers underneath.
But it doesn't work with children with applied dynamics to them.

If it GetDeformCache() + GetCache() - maybe there's an example exist?

@ferdinand you were clear and example is pretty good, I got the idea.
No need to write code for me

But it's not trivial overall, I just need to spend some time on this.

Thanks again.

@ferdinand thanks a lot, seems clear.
More or less...

Hi @ferdinand,

Thank you, appreciate your reply.

So if Spline provided as an input then GetCache() returns LineObject which is great.

Can you please highlight how to deal with Splines under the Cloner object?
Cloner's deform cache in that case returns null with nondeformed splines:

Test generator scene: py-dynamics-cache.c4d

Hi,

I'm trying to get points position of the spline with softbody dynamics applied to it from within generator object.

c4d.utils.SendModelingCommand(command=c4d.MCOMMAND_CURRENTSTATETOOBJECT, list=[some_obj], mode=c4d.MODELINGCOMMANDMODE_ALL, doc=doc)

is returning non-dynamics positions.
The same is happen when you'll call "Current state to object" — dynamics would be just cancelled.

How that might be done? I just want to dynamically obtain current spline deformation.

Thanks!

@zipit Congrats!

Oh, such a rocket science!
Many thanks Manuel, it seems it works super fine.

@m_magalhaes said in Store generator's property:

    if op[ID_CHECKBOX]:
        bc = op.GetDataInstance()
        tag = bc.GetLink(ID_TAGLINK)
        if tag:
            print ("the tag is", tag)
        else:
            print ("this should never happen")
    else:
        bc = op.GetDataInstance()
        tag = bc.GetLink(ID_TAGLINK)
        if tag:
            print ("this should never happen")
        else:
            print ("there's no tag and box isn't checked")

Hi everyone,

I'm completely misunderstand how to store object's related data.
Read few posts, but there are common words only... Not sure there would be Read/Write/Copy overrides...

I'd like to have a selection tag on the Generator object based on UI's bool (CHECKBOX_ID).
If it's already exist - then use existing, otherwise add it automatically.
Link should be updated after save/open

Please point me to a solution, if any.

CHECKBOX_ID = 1001
SOME_ID = 5000
SOME_ID_TAG = 5001

class GeneratorPlugin(c4d.plugins.ObjectData):
  def Init(self, op):
    if op is None: raise RuntimeError("Failed to retrieves op.")
    self.InitAttr(op, bool, CHECKBOX_ID)
    op[CHECKBOX_ID] = True

    bc = op[SOME_ID]
    if bc is None:
      print "Data Not Exist"
      bc = c4d.BaseContainer()
      bc[SOME_ID] = c4d.BaseContainer()
    else:
      print "Data Exist", bc.GetLink(SOME_ID_TAG)
    op[SOME_ID] = bc

  def GetVirtualObjects(self, op, hh):
    if op is None or hh is None: raise RuntimeError("Failed to retrieves op or hh.")

    tmpSel = c4d.BaseSelect()
    # some calculations

    tag = op[SOME_ID].GetLink(SOME_ID_TAG)
    if op[CHECKBOX_ID]:
      if not tag:
        tag = c4d.SelectionTag(c4d.Tpolygonselection)
        op.InsertTag(tag)
        op[SOME_ID].SetLink(SOME_ID_TAG, tag)
      tmpSel.CopyTo(tag.GetBaseSelect())
    elif tag:
      tag.Remove()
      op[SOME_ID].RemoveData(SOME_ID_TAG)