Tag plugin - adding childs to Cycle

Helper

On 23/08/2017 at 01:41, xxxxxxxx wrote:

Hi Andreas,

Great thanks you.
I think Descriptions are easier in c++ than in python.

Helper

On 23/08/2017 at 07:51, xxxxxxxx wrote:

Hi Pim,

I'm not sure why Descriptions should be easier in C++ than in Python?
Since R18 you can pretty much work with them like in C++. But please, correct me, if I overlooked anything or misunderstood the comment.

Helper

On 23/08/2017 at 12:06, xxxxxxxx wrote:

To be honest, perhaps it is my lack of understanding of python R16 Descriptions.
All these various levels, confuses me.
In c++, for me it is more straight forward.

And of course, my main platform for developing plugins is still R16.
Maybe it is time to go over to R18.

Could you perhaps do the c++ example in python for me?

-Pim

Helper

On 23/08/2017 at 12:58, xxxxxxxx wrote:

So I have this tag plugin that uses this res file:

CONTAINER globalswitch
{
	NAME globalswitch;
  
    GROUP SWITCHFRAMESGROUP
    {  
        LONG STARTFRAME	{MIN 0; }
        
        LONG nw1
        {
            CYCLE
            {
                nw3;
                nw4;
            }
        }
  
	}
}

What Descriptions should I use to add / remove child's from the cycle?

-Pim

Helper

On 24/08/2017 at 06:18, xxxxxxxx wrote:

Hi Pim,

yes indeed, if you want to work with Descriptions in Python it will be much easier from R18 on.
Actually I'm not sure you will be able to dynamically fill a Cycle/Combo box in Python with versions previous R18, as you are lacking the ability to overwrite GetDDescription(). the only real option I see is to do it via Cycle in User Data. See this thread: Adding cycles to a UserData Field

For everybody working with R18 and later, it's quite easy and roughly looks like this:

def GetDDescription(self, node, description, flags) :
  
    # Before adding dynamic parameters, load the parameters from the description resource
    if not description.LoadDescription(node.GetType()) :
        return False
  
    # Get description single ID
    singleID = description.GetSingleDescID()
  
    myCycleID = c4d.DescID(nw1)  # using ID from above post
  
    if singleID is None or myCycleID.IsPartOf(singleID)[0]:
        # Add dynamic parameter
        bcCycle = c4d.GetCustomDataTypeDefault(c4d.DTYPE_LONG)
  
        bcCycle.SetInt32(c4d.DESC_CUSTOMGUI, c4d.CUSTOMGUI_CYCLE)
        bcCycle.SetString(c4d.DESC_NAME, "Cycle")
  
        # Cycle elements get filled into another container
        items = c4d.BaseContainer()
        items.SetString(0, "Item 0")
        items.SetString(1, "Item 1")
        items.SetString(2, "Item 2")
  
        bcCycle.SetContainer(c4d.DESC_CYCLE, items)
  
        # Add cycle to the parameters in specified group
        if not description.SetParameter(myCycleID, bcCycle, c4d.DescLevel(SWITCHFRAMEGROUP)) # group ID from above post
            return False
  
    # ...
  
    # After parameters have been loaded and added successfully, return True and DESCFLAGS_DESC_LOADED with the input flags
    return (True, flags | c4d.DESCFLAGS_DESC_LOADED)

Helper

On 24/08/2017 at 06:29, xxxxxxxx wrote:

Regarding creation from user data even if I think pgroof already understand it, but since there is no proper exemple for handle it, I would share a class I did for a plugin in order to help future readers.
https://github.com/gr4ph0s/RefractiveIndex-Importer/blob/master/res/src/UserData.py
And
https://github.com/gr4ph0s/RefractiveIndex-Importer/blob/master/RefractiveIndex.pyp

Helper

On 24/08/2017 at 09:39, xxxxxxxx wrote:

Thanks, the cycle is now updated and indeed quite easy, thanks!

One questions:
I see that function GetDDescription is executed quite often.
So, I guess inserting the Cycle must be done somewhere else. For example in Init()?

-Pim

PS one small error. The line "if not description.SetParameter(myCycleID, bcCycle, c4d.DescLevel(SWITCHFRAMESGROUP)) :" should have a DescID and not a DescLevel.

Helper

On 24/08/2017 at 09:40, xxxxxxxx wrote:

Originally posted by xxxxxxxx

Regarding creation from user data even if I think pgrooff already understand it, but since there is no proper example for handle it, I would share a class I did for a plugin in order to help future readers.

Thanks you very much, very helpful!

Helper

On 24/08/2017 at 09:58, xxxxxxxx wrote:

https://github.com/gr4ph0s/RefractiveIndex-Importer/blob/master/RefractiveIndex.pyp
Look at the Message function and more specially about c4d.MSG_MENUPREPARE

Helper

On 25/08/2017 at 00:40, xxxxxxxx wrote:

Great, thanks.

Helper

On 25/08/2017 at 00:43, xxxxxxxx wrote:

I guess GetDDescription is executed every time a description is changed?

Is that the only way to detect whether a different entry cycle is selected, or is there a message I can check.

Helper

On 25/08/2017 at 05:13, xxxxxxxx wrote:

Hello,

GetDDescription() is called every time Cinema is interested in the parameter description of an element. The edited Description it not stored anywhere so you have to define your custom parameter description every time GetDDescription() is called (since the parameter description can change at any time).

If you are interested when a parameter value changed you can implement NodeData.SetDParameter() or you can listen for the MSG_DESCRIPTION_POSTSETPARAMETER message.

best wishes,
Sebastian

Helper

On 25/08/2017 at 06:43, xxxxxxxx wrote:

So, now I can update the children in the Cycle field.

In the tag plugin, message() is used to get the value to define a new child of Cycle.
I add the input to a List, that is used in GetDDescription to define the children of Cycle.

However, how can I trigger GetDDescription to be executed, so the update Cycle is shown?

def Message(self, node, type, data) :
        
    if type == c4d.MSG_DESCRIPTION_COMMAND:
        if (data['id'][0].id == ADDCHILD) :
            data = node.GetDataInstance()
  
            child= data[CHILDINPUT]
	    self.children.append[child]	#used in GetDDescription to define the children of Cycle
            #now trigger GetDDescription  to show the updated Cycle
    return True

Helper

On 25/08/2017 at 08:56, xxxxxxxx wrote:

Hello,

you can make the host object dirty be setting the dirty flag DIRTYFLAGS_DESCRIPTION. That should trigger GetDDescription () again.

best wishes,
Sebastian

Helper

On 26/08/2017 at 05:10, xxxxxxxx wrote:

Thanks, it works if I set the tag to dirty using DIRTYFLAGS_DESCRIPTION.
_
_
-Pim