World Standart of Parenting

solution found!

just slap this in a text editor and try it:

import bpy
from mathutils import Matrix

act = bpy.context.active_object
# Parent selected objects to active, empty the inverse matrix and preserve the world matrix.
for o in bpy.context.selected_objects:
    if o==act: continue
    mat_world = o.matrix_world.copy()
    o.parent_type = 'OBJECT'
    o.parent = act
    o.matrix_parent_inverse = Matrix.Identity(4)
    o.matrix_world = mat_world

Yes. This is how it works everywhere. I consider it as a bug.

Some one should bring this to devtalk. blender just bad at parenting.

Hi, I made fork for addon, that allows to parent without jumping and with inverse github.com/hitrpr/blender-apply-parent-inverse/tree/patch-1 here it is. And yes, It should be an option.

You can do what you ask* by Ctrl+A and "All transforms to Deltas"
*(or maybe not)

Can you show an example how it works in other apps, please? It's a bit hard to understand what you mean. I don't really understand why it should be good to set the child origin coordinates automatically to the parent object origin coordinates after parenting.

If you just want to have the transform values be the same like the parent, you have a plenty possibilities. One easy way is just to copy the parent object rotation value to the child rotation e.g.

EDIT: Before I forget it: Do you know Delta Transforms in Blender? Maybe this is the solution you need. I've watched some maya object parenting videos and I can't see a difference in compare to Blender. All looks the same. But maybe I don't really get what you mean. So a better decscription of your problem would be nice. Thank you!

I think this one can be considered implemented since now we have now "Object (Keep Transform Without Inverse)" option in Ctrl+P, which is basically what author was looking for.

I agree with this post! Just remove the movement after parenting with clear inverse !! cmon Blender guys!!

I've been waiting for years for Blender to adopt the same system of parenting and coordinates as all other software (Maya, Modo, 3DMax, C4D, Softimage, Unity etc.). If everyone does it one way and you're the only one doing it differently or you're a genius or or you're making a serious mistake.

IMHO, Blender lacks of two operations:

• in Ctrl-P menu : a "Object (without inverse, keep transform)" which parent, clear parent inverse and leave the object in place
• in Alt-P menu: "Clear parent inverse (keep transform)" which clear parent inverse and leave the object in place

I guess those operations does not exist because it will not work if child have rotation and parent non uniform scale (I think, not really sure). But it worth it anyway. If the operation does not do what you expected, you still have Ctrl-Z...

Agree. I work with Unity engine, when I want to align one object to another all i have to do is to parent object A to object B, so object B is inside A and select object B, reset position and rotation to 0 then unparent it. At the end I have 2 objects that are in the same place and rotated in the same way.

Yes some property doesn’t get updated properly after adding the child object.

As a workaround: You can force it to update by going to Object Properties -> Relations and set the Parent Type to “Object” once again. (in the child object)

If you did this the coordinate system of the child is treated correct as relative to its parent.

And if you call Clear Parent it will be positioned as if its local coordinates were worldspace coordinates. Use the second option in Clear Parent to transform its coordinates to worldspace ( that way it will keep its position and orientation, but its values change)

I'm not sure I understand: you mean that when parenting the child objects coordinates should use parent object as 0,0,0?