[3D]CreateObjectGroup() + setObjectParent() => initial position multiplied by 2 ?!

vincent2105

Nobody ? :/
Here is the link NXK3ABB454.
If you move the camera, you will see that the real positions of the cube and the sphere aren't the one initially declared.
Without using "createObjectGroup() and "setObjectParent()", it's okay...
I hope somebody will understand my problem.

Ben 2.0

Sorry I am not much help... I have never used createobjectgroup() before.

pianofire

@vincent2105 This looks like a bug to me. I will raise an issue

vincent2105

@pianofire Thank you ! I hope it will be fixed !

pianofire

@vincent2105 Do you have a work around?

If you do I would put a flag on it in case it is fixed in the future

bool issue = true

if issue 
  // Adjust initial positions because of bug
endif

vincent2105

@pianofire No, i'm just discovering for the moment. I plan to program a space game, where you can travel from a planet to another and things like that. :)

Dave

~~This is certainly a bug. Setting the parent of an object should not affect its position - only the origin point of rotation and translation.~~ Thanks for reporting @vincent2105!

EDIT: This has been looked into and there is now an better explanation of how things should work here:

https://fuzearena.com/forum/topic/1920/createobjectgroup-explanation

Kat

To work around it for now you could set up any object groups with an origin of {0, 0, 0} and change the position of the group afterwards. So in your example program if you place the cube at {0, 0, 0} and the sphere at {0, 0, -30} then after creating the group add setObjectPosition(linkedObject, {10, 0, 30}) I think that would give you the position and behaviour that you had been expecting.

vincent2105

Thank you Dave and Kat !
Hope to show you an interesting program someday !

Dave

@vincent2105 You are very welcome! I am excited to see the program when it's ready!

vincent2105

In fact, I'm not sure what type of game I want to program... Maybe a city builder...

Dave

@vincent2105 We've been looking into this and there has been some misunderstanding. Please take a look at the post I've done about object groups, it should be quite helpful!

https://fuzearena.com/forum/topic/1920/createobjectgroup-explanation

vincent2105

Thank you for taking the time for the explanations, it's very clear, indeed, I did not have the right approach.