Bug: Constantly updating coordinates

merkvilson

Hello PluginCafe

I found a weird bug in c4d.OBJECT_GENERATOR plugins.

I tried to make the Matrix generator a child of the 'output' object which is a spline.

At first glance, everything works correctly, but problems appear as soon as you try to change the coordinates.

It works correctly if I'm making them a child of a null object or changing hierarchy in different ways but if I need to accomplish this task the way I want, it simply goes crazy

alt text

import c4d

class test(c4d.plugins.ObjectData):

    def GetVirtualObjects(self, op, hh):

        if not op.GetDown(): return None

        gch = op.GetAndCheckHierarchyClone(hh, op.GetDown(), c4d.HIERARCHYCLONEFLAGS_ASIS, False) 
        output = gch["clone"]
        gchDirty = gch["dirty"]

        if not gchDirty: return output

        indexView = c4d.BaseObject(1018545)
        indexView.InsertUnder(output)
        indexView[c4d.ID_MG_MOTIONGENERATOR_MODE]  = 0
        indexView[c4d.MG_OBJECT_LINK]              = output

        return output


if __name__ == "__main__":
    c4d.plugins.RegisterObjectPlugin(id = 1000004,str = "Test",g = test,description = "",info = c4d.OBJECT_GENERATOR|c4d.OBJECT_INPUT,icon = None)

m_adam

Hi @merkvilson,

Actually, the issue came from inserting the matrix as a child of the cached spline. The cached spline gets a rotation of X then you apply again the rotation of the generator, which make X+X rotation.

In order to avoid that, return one null with both object.

def GetVirtualObjects(self, op, hh):

	if not op.GetDown(): return None

	gch = op.GetAndCheckHierarchyClone(hh, op.GetDown(), c4d.HIERARCHYCLONEFLAGS_ASIS, False) 
	output = gch["clone"]
	gchDirty = gch["dirty"]

	if not gchDirty: return output

	null = c4d.BaseObject(c4d.Onull)
	indexView = c4d.BaseObject(1018545)
	
	output.InsertUnder(null)
	indexView.InsertUnder(null)

	indexView[c4d.ID_MG_MOTIONGENERATOR_MODE]  = 0
	indexView[c4d.MG_OBJECT_LINK]              = output

	return null

If you have any questions, please let me know.
Cheers,
Maxime