How does one use PaintTexture



  • On 10/01/2016 at 08:26, xxxxxxxx wrote:

    Hi,

    In order to automate my workflow I am trying the create a new Bodypaint Texture for multiple objects in the scene.
    Starting with a single object I am getting nowhere.

      
    import c4d  
    import c4d.modules.bodypaint as BP  
      
    def main() :  
      c4d.CallCommand(13957) # Clear Console  
      
      doc = c4d.documents.GetActiveDocument() # Get the open document  
      
      obj = doc.GetActiveObject()  
      if not obj.CheckType(c4d.Opolygon) :  
          return  
        
      doc.StartUndo()  
        
      filename = "C:\\Temp\\CreateNewTexture via python.png"  
      settings = c4d.BaseContainer()  
      settings[c4d.TEXTURE_FILEFORMAT] = c4d.FILTER_PNG  
      settings[c4d.TEXTURE_WIDTH] = 1024  
      settings[c4d.TEXTURE_HEIGHT] = 1024  
      settings[c4d.TEXTURE_MODE] = c4d.COLORMODE_RGB  
      tex = BP.PaintTexture.CreateNewTexture(filename, settings)  
        
      if tex:  
          layer = tex.GetFirstLayer()  
          if layer and layer.IsInstanceOf(c4d.OBJECT_PAINTLAYERBMP) :  
              print layer.GetBw(), layer.GetBh()  
              BP.PaintTexture.SetSelected_Texture(layer, ???) <-- 'None' is not allowed as second parameter, but PaintMaterial can not be instantiated  
        
      doc.EndUndo()  
      c4d.EventAdd()  
      print "Done"  
      
    if __name__=='__main__':  
      main()  
      
    

    From the different discussions on this forum I have been able to assemble the above code, which was reported would work with the C++ SDK. However, I am unable to select the texture after having created it, since the second argument is the issue. The documentation mentions to use 'None' but that isn't accepted.

    After I run the script I can see the newly created texture listed in the Texture menuitem of the TextureView of the UVedit layout. However, if I try to select this texture the application freezes.

    Another trial and error results in the same issue.

      
    ...  
      tex = BP.PaintTexture.CreateNewTexture(filename, settings)  
        
      if tex:  
          layer = tex.GetFirstLayer()  
          if layer and layer.IsInstanceOf(c4d.OBJECT_PAINTLAYERBMP) :  
              tex.SetActiveLayer(layer, activatetexture=True, show=True) <-- Makes application unresponsive  
              print layer.GetBw(), layer.GetBh()  
        
      doc.EndUndo()  
      c4d.EventAdd()  
      print "Done"  
      
    if __name__=='__main__':  
      main()  
      
    

    The discussions mentions that the PaintTexture wasn't really working a few years ago,  and bugs where reported (i.e AddLayerBmp() would not accept 'None') ... has anything changed since, or am I forced to switch to C++ just as all the others?



  • On 11/01/2016 at 03:59, xxxxxxxx wrote:

    Hello,

    AddLayerBmp() should accept insertafter=None since R16 SP3. Could you link to the other threads you are referring to?

    In a script of the Script Manger you don't have to call GetActiveDocument() and GetActiveObject() since "doc" and "op" are already defined.

    To access the PaintMaterial one would have to use PaintMaterial::GetPaintMaterial() which is apparently currently not implemented in Python.

    I can confirm that SetSelected_Texture() does not accept None. A bug report was filed. It is currently probably the best solution to switch to C++.

    best wishes,
    Sebastian



  • On 11/01/2016 at 07:11, xxxxxxxx wrote:

    Thanks for the reply Sebastian.

    Glad to see that AddLayerBmp was fixed.
    As for the discussions I was referring to, I didn't bookmark them all, but here are a few:
    https://plugincafe.maxon.net/topic/7733/9790_q-how-can-i-draw-2d-lines-in-the-textureviewer&KW=painttexture&PID=38457#38457
    https://plugincafe.maxon.net/topic/7240/8314_open-texture-using-callbutton&PID=34971#34971
    https://plugincafe.maxon.net/topic/8341/10888_bodypaint-layer-bitmap-solved&KW=painttexture&PID=42682#42682
    https://plugincafe.maxon.net/topic/8367/10929_bodypaint-bitmap-dirty-status&KW=painttexture&PID=42844#42844

    Also, a big thank you to reminding me about the GetActiveDocument() and GetActiveObject() in a script. A bad habit I have, as I first try to write small portions that work as a script, and then combine all into a plugin. I guess I was already thinking in terms of the plugin.

    So, for a plugin I will need to turn to C++, but for a quick script it seems there is no possibility to make it work in Python. Any alternative for scripts?
    Daniel


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