Set Tracers "trace link" (inExclude) field from python tag
bonsak last edited by bonsak
Im trying to set the Tracer objects "Trace link" inExclude list from a python tag.
I dont get any errors and the GetObjectCount method returns the correct number of objects, but none are visible in the list itself. Any help appreciated. See attached file for example.
import c4d def main(): # Get userdata from parent root = op.GetObject().GetUp()[c4d.ID_USERDATA,1] # Get first joint hipJoint = root.GetDown() # Get second joint kneeJoint = hipJoint.GetDown() # Get the tracers inExclude field tracerList = op.GetObject()[c4d.MGTRACEROBJECT_OBJECTLIST] # Insert hip tracerList.InsertObject(hipJoint, 1) # Insert knee tracerList.InsertObject(kneeJoint, 1) # Returns 2 but none are visible in the tracers inExclude field print tracerList.GetObjectCount()
s_bach last edited by
when you "get" the InExclude list in Python, you get a copy of the value, not a reference.
After editing the copy you have to store the new value again in the original object:
# get data tracerList = op.GetObject()[c4d.MGTRACEROBJECT_OBJECTLIST] # modify data #store data op.GetObject()[c4d.MGTRACEROBJECT_OBJECTLIST] = tracerList
But remember: a tag is executed every time the scene is evaluated. So the objects are added to the list again and again. You could maybe check if the list is empty and return if that is not the case:
if tracerList.GetObjectCount() > 0: return
Please also use the Q&A system to mark your threads as questions.
bonsak last edited by