Hey folks,
I encountered Undo related issue again. It might be due to my lack of understanding for undo things but let me ask you a question.
I wrote a test tag plugin with python which follows another object's position with a little offset.
It simply works but when I undo, the object that has the tag doesn't react until I click somewhere (see below).
Is it possible to solve this issue with python?
I know undo things are prohibited in execute() of tagdata, so is there any workaround?
Please help me if you know the solution.
Here's quick code for this.
testtag.pyp
import os
import c4d
from c4d import plugins, bitmaps, utils
PLUGIN_ID = *******
class TestTagData(plugins.TagData):
def Init(self, node):
pd = c4d.PriorityData()
if pd is None:
raise MemoryError("Failed to create a priority data.")
pd.SetPriorityValue(lValueID = c4d.PRIORITYVALUE_MODE, data = c4d.CYCLE_INITIAL)
node[c4d.EXPRESSION_PRIORITY] = pd
return True
def Execute(self, tag, doc, op, bt, priority, flags):
bc = tag.GetDataInstance()
obj = bc.GetLink(c4d.TTEST_TARGET_OBJECT)
if obj is None:
return False
mrx = obj.GetMg()
mrx.off += c4d.Vector(100, 0, 0)
op.SetMg(mrx)
return c4d.EXECUTIONRESULT_OK
if __name__ == "__main__":
plugins.RegisterTagPlugin(id = PLUGIN_ID, str = "Test Tag", info = c4d.TAG_EXPRESSION | c4d.TAG_VISIBLE, g = TestTagData, description = "ttest", icon = None)
ttest.res
CONTAINER Ttest
{
NAME Ttest;
INCLUDE Texpression;
GROUP ID_TAGPROPERTIES
{
LINK TTEST_TARGET_OBJECT
{
ANIM ON;
ACCEPT { Obase; };
}
}
