On 27/12/2017 at 10:47, xxxxxxxx wrote:
Cinema 4D Version: R19
Platform: Windows ;
Language(s) : C++ ;
Don't know if this is by design or a bug in the SDK?
I have two polygon objects, let's say a default cube and plane primitives made editable.
In the Object Manager I take the cube and move it as child of the plane.
For the plane I create an XPresso tag and drag the plane object into the XPresso editor.
Then I select both objects in the Object Manager and perform a "connect+delete" command.
When I double click the XPresso tag it opens and the object node shows its title in yellow, named "Object". It does not have a link to the joined object.
When I do this programmatically, the same result.
To be honest, one might wonder what the object node in the XPresso tag should point to after joining. One would expect the joined object.
I know that when cloning is performed with an XPresso tag an AliasTrans needs to be used in order to get the links correctly in the cloned XPresso tag. Is this something that was internally overlooked in the SDK for the join command? Or was this by design, since too many side-effects could result from it?
There is this specific option MDATA_JOIN_MERGE_SELTAGS provided to merge the selection tags of parent and child objects during the join.
An XPresso tag on a child object simply vanishes after the join command, while (some) other tags are copied/merged.
An XPresso tag on the parent object remains, but the object link gets broken.
If I to the same with a look-at-camera tag:
- tag on child gets deleted by the join command (what else would one expect)
- tag on parent remains after join, and is still actively working (obvious)
Why not the same behaviour for an XPresso tag?