Q1: Which coordinates system? Q2: object.Transform() / objec

Thanks.
I’ll most likely try this tonight.

Hello,

When working with scripts or plugins what is the default coordinates system which is used?

For example, Object.GetPoint returns a point coordinates expressed in the object coordinates system?

If the default coordinates system is the object coordinates system, I should use Object.Transform() to work in the world coordinate system?
If yes, do I need to use object.InverseTransform() before leaving the plugin?

That is my understanding – object points are default and relative to the group axis.

You must use both Transform/InverseTransform to return to object coords.

Thanks.

If I have 2 points from 2 different objects, how do I get the coordinates gap between the 2 points in order to compute a translation from one point to the other one?

(that’s why I wanted to work with world coordinates but according to Paul’s answer using Object.Transform() before getting each point coordinates won’t give me the actual world coordiantes of the 2 points)

Sorry if my answer was not clear.
The object.Transform will change the object point coordinates to world coordinates

The GetPoint before a Transform will get the point relative to the group axis.

Otherwise the difference between points is

GetPoint(A) + ParentGroupA.GetPosition (relative to root group)

subtracted from

GetPoint(B) + ParentGroupB.GetPosition (relative to root)

The object.Transform will change the object point coordinates to world coordinates
So, I can use GetPoint after a Transform will get the point world coordinates.

OK. So for this part, it’s now clear.

I can also use the solution with ParentGroupA.GetPosition and ParentGroupB.GetPosition.

And I still need some explanations:
It is not clear to me what the ‘root group’ is: the scene root? The root of the group of ObjectA and the root of objectB (in which case it will work only if ParentGroupA and ParentGroupB are under a same group)?

It may not work here:
[pre class=’ip-ubbcode-code-pre’]
Main
!— GroupLevelA_1
! !— GroupLevelA_2
! !— ObjectA
!— GroupLevelB_1
!— GroupLevelB_2
!— ObjectB
[/pre]

It will work here:
[pre class=’ip-ubbcode-code-pre’]
Main
!— GroupLevel_1
!— GroupLevelA_2
! !— ObjectA
!— GroupLevelB_2
!— ObjectB
[/pre]

GroupX.GetPosition Scene.GetRootGroup(),X,Y,Z

Effectively returns the GroupX position in world coordinates.

Everything is a child of Scene.GetRootGroup() (‘Scene’ in the hierarchy view) so it will work in all cases.

You must be logged in to reply in this thread.