Thanks for your answer.
Hello! I don’t think there’s a particular reason for that, but I might be wrong so I’ll check with @Deltakosh and @sebavan However, all that addChild does is calling setParent, which both AbstractMesh and TransformNode have, so there’s no missing functionality
No special reason, @carolhmj feel free to move it in TransformNode
Thanks for your reply ,we can use setParent.If we support addChild,i can organise my code by another way.
ps：My English is not very good, please forgive me.
Thanks for your reply .