plugins.ObjectData and renderer

  • On 13/05/2013 at 13:39, xxxxxxxx wrote:

    I'm still confused about the cache stuff.
    I have following code, creating a cloner with a sphere as a child.
    I then set the p.x (c4d.MG_LINEAR_OBJECT_POSITION,c4d.VECTOR_X]) to the frame number to have some animation.
    In the editor it works perfectly, but when i render out to the picture viewer, there is no animation.
    Just the current frame animation is rendered. All frames are the same.

    import c4d, os, sys
    from c4d import bitmaps, documents, gui, modules,  plugins
    from c4d.modules import mograph
    RADIUS                  = 1002
    HALFTONESETTINGS        = 1000
    XNUMBER                 = 1005
    ENABLE                  = 1007
    DUMMY                   = 1010
    class halftone(plugins.ObjectData) :
        def __init__(self) :
            self.lastframe = None
        def Init(self, op) :
            op[XNUMBER] = 3
            op[RADIUS] = 10.0
            op[ENABLE] = False
            return True
        def GetVirtualObjects(self, node, hierarchyhelp) :
            doc = documents.GetActiveDocument()
            frame = doc.GetTime().GetFrame(doc.GetFps())
            node[DUMMY] = frame
            if (not frame == self.lastframe) :
                self.lastframe = frame
            #if (not c4d.CheckIsRunning(c4d.CHECKISRUNNING_EXTERNALRENDERING)) :
            dirty = node.CheckCache(hierarchyhelp) or node.IsDirty(c4d.DIRTY_DATA)
            if dirty is False: 
                print "return"
                return node.GetCache(hierarchyhelp)
            if (not node[ENABLE]) : return None
            null = c4d.BaseObject(c4d.Onull)        #hulp null 
            null[c4d.ID_BASELIST_NAME] = "HNull"
            cloner2 = c4d.BaseObject(1018544)        #insert cloner           
            cloner2[c4d.ID_BASELIST_NAME] = "cloner2"
            cloner2[c4d.MG_LINEAR_COUNT] = node[XNUMBER]     
            cloner2[c4d.MG_LINEAR_OBJECT_POSITION,c4d.VECTOR_X] = frame
            sphere = c4d.BaseObject(c4d.Osphere)    #Sphere
            sphere[c4d.PRIM_SPHERE_RAD] = node[RADIUS]
            sphere[c4d.PRIM_SPHERE_SUB] = 4
            return null
    if __name__ == "__main__":
        pluginstr = "Htest v043"
        path, file = os.path.split(__file__)
        bmp = bitmaps.BaseBitmap()
        bmp.InitWith(os.path.join(path, "res", "halftone.png"))
        okyn = plugins.RegisterObjectPlugin(id          = 10297362, 
                                     str         = pluginstr,
                                     g           = halftone,
                                     description = "halftone", 
                                     icon        = bmp,
                                     info        = c4d.OBJECT_GENERATOR)
        if (okyn) : 
            print pluginstr + " initialized."
        else: print "Error initializing " + pluginstr

    Adding a check whether the external renderer is working (CHECKISRUNNING_EXTERNALRENDERING) does not help.

    So, is the cache handled differently when rendering?

    Note: I do not use self.SetOptimizeCache(True), because I want to detect is the frame has changed.

  • On 13/05/2013 at 15:09, xxxxxxxx wrote:

    i am not 100% sure, but i think the culprit is doc = documents.GetActiveDocument(). for rendering 
    the document is being cloned, which will mess up your frame based dirty calculations as the current 
    frame in the active document won't change while rendering. use the passed node to get your 
    document. you should also overwrite NodeData.CheckDirty() instead of fiddling with the dirty flag 
    from GVO. it does work from GVO, but under certain circumstances things can go wrong.

    def GetVirtualObjects(self, node, hh) :
    	doc = node.GetDocument()

    you also do not need to redefine your description symbols. you can use them directly.

    node[c4d.XNUMBER] = someValue

  • On 13/05/2013 at 23:31, xxxxxxxx wrote:

    Yes, it works now (doc = node.GetDocument())
    Thanks for the solution and the explanation.

    Do you have an example of overwriting NodeData.CheckDirty()?

    Regards, Pim

  • On 14/05/2013 at 04:16, xxxxxxxx wrote:


    I have to correct myself. CheckDirty() is not a member of NodeData, but of ObjectData.
    Here is the example from the docs.

    def CheckDirty(self, op, doc) :
        frame = doc.GetTime().GetFrame(doc.GetFps())
        if frame != lastFrame:
            lastFrame = frame

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