i am trying to find out the difference between two transforms.
so i have one transform and one point in space (x, y, z), and i need the transformation that iis necessary to get from the end point of the first transformation to that point in space.

it is not only vector math (c = b-a), becasuse the first transformation also includes a rotation that influences the vector that will go from the first transformation to the point in space.

it seems that you are mixing up quite some stuff here.

first, a transformation is not “a point is space”, it is a transformation that can be applied to a vector.
a vector is also not a position, unless its bound to the origin.

so maybe you can rephrase the question a bit…? what vector do you want to transform from where to where?

basically what i want to do is to have one ‘root object’ that has a certain position and rotation, and four other points in space that have a fixed relation to the position and rotation of that root object.

but i am missing these 4 fixed relations between ‘root object’ and the four points, i have only absolute coordinates of all of them.

Hi…i am a new user here. Actually a transformation is not a point is space, it is a transformation that can be applied to a vector.Also vector is not a position, unless its bound to the origin.