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
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