How to access Snap Radius

  • On 29/09/2015 at 00:11, xxxxxxxx wrote:

    Using Customize Commands you can drag the Snap Radius slider to your interface and set the radius there.
    How to do this (read and write) using Python?


  • On 29/09/2015 at 00:56, xxxxxxxx wrote:

    My guess is that it is saved somewhere in the document or world preferences..

    I would also be interested in how we can create such a palette icon widget?

  • On 29/09/2015 at 04:49, xxxxxxxx wrote:


    you can read the snap radius quite easily. Just get the settings via GetSnapSettings(). In the returned BaseContainer it's c4d.SNAP_SETTINGS_RADIUS. Like so:

      bcSnap = c4d.modules.snap.GetSnapSettings(doc)
      print bcSnap.GetFloat(c4d.SNAP_SETTINGS_RADIUS)

    There's also SetSnapSettings(). But for some reason I can't get it to work in Python. Either I'm too stupid or there's a bug. As I'm alone this week, I'd like to postpone the research. We'll see, if I find the time.

    One thing, that the docs do not mention (I'll add it there), you need to fire a special event after setting a new radius, so the snap system recognizes the new value.
    This is what works in C++ (here used in a CommandData plugin, needs to include "c4d_snapdata.h") :

    	BaseContainer bc = SnapSettings(doc); // get current settings
    	bc.SetFloat(SNAP_SETTINGS_RADIUS, 42.0);
    	SnapSettings(doc, bc); // set the changed settings
    	SpecialEventAdd(440000118); // ID_SNAPRADIUS is missing in SDK

    @Niklas: Please open a new thread for new topics. In short it is done via a small dialog.

  • On 29/09/2015 at 05:42, xxxxxxxx wrote:

    Could you also update the manual with this information.
    In the link you mention, I do not see SNAP_SETTINGS_RADIUS.


  • On 29/09/2015 at 05:46, xxxxxxxx wrote:

    Sure, thanks for the hint.
    As soon as we have solved the SetSnapSettings() issue, we'll update the Python docs on this topic.

  • On 30/09/2015 at 02:11, xxxxxxxx wrote:

    Hi Andreas,

    Sorry, for me it is not working.
    I can read, but not write the snap radius.

    Here the code converted to Python.

    import c4d
    from c4d import gui
    #Welcome to the world of Python
    def main() :
        bc = c4d.modules.snap.GetSnapSettings(doc)     #get current settings
        print bc.GetFloat(c4d.SNAP_SETTINGS_RADIUS)
        bc.SetFloat(c4d.SNAP_SETTINGS_RADIUS, 25.0)
        c4d.modules.snap.SetSnapSettings(doc, bc)    #set the changed settings
        c4d.SpecialEventAdd(440000118)    #ID_SNAPRADIUS is missing in SDK
    if __name__=='__main__':


  • On 30/09/2015 at 02:13, xxxxxxxx wrote:

    Hi Pim,

    did you read my post? That's what I wrote, I couldn't get it to work in Python, either. That's the reason I posted C++ code to the Python forum. We need to investigate... sorry

  • On 30/09/2015 at 05:48, xxxxxxxx wrote:

    Sorry, I guess I did not fully understand until I tried it myself.
    Now I see what you mean.

    "There's also SetSnapSettings(). But for some reason I can't get it to work in Python".
    SetSnapSettings is a python command, which you do not use in your c++ code.

    So, c++ is working, but python is not working?


  • On 30/09/2015 at 05:51, xxxxxxxx wrote:

    Yes, in C++ it's working. And Python's SetSnapSettings() and GetSnapSettings() functions are just called SnapSettings(), overloaded for read and write.

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