Hi Soeren,

I build a new model for the arm movement where I use the new files you

uploaded. Now I want to scale another model to the AnyBody size and

therefore I look for exact coordinates again. Normally no problem but

in this model there are difficulties: for the humerus segment I need

the origin, the joint coordinates and the CoM coordinates. When I

click through the window next to the texteditor I get the values for

the origin, but I donÂ´t find the definition of this origin. But thatÂ´s

not my problem. The joint coordinates were easy to find, after a

kinematic analysis I got nice values.

But now my question:

The variable “sCoM” is defined in relative coordinates. When I want to

know the absolute coordinates I define a RefNode with the same

coordinates like sCoM and after loading and running a kinematic

analysis again I can click in the window next to the text editor to

get “r”. I tried it for the Humerus segment but the absolute values

for this sCoM node doesnÂ´t fit with the origin+relative coordinates.

I definied it like this:

sCoM={0,-0.18*Length,0}; //given by the model
AnyRefNode show_sCOM= //defined by myself
{
sRel = {0,-0.18*.Length,0};

AnyDrawRefFrame sCOM=

{

RGB = {1,0,0}; //rot

ScaleXYZ = {0.3, 0.3, 0.3};

};

};

Here are the values I get for r, sCoM and abs. sCoM:

Main.Model.HumanModel.Right.ShoulderArm.Seg.Humerus.r = {0.01868401,

0.4146685, 0.1929215};

Main.Model.HumanModel.Right.ShoulderArm.Seg.Humerus.sCoM = {0,

-0.06120846, 0};

In my opinion this has to give the absolute coordinates for sCoM:

(0.01868401, 0.35346004, 0.1929215) > x and z were the same as before!

But AnyBody calculates:

ain.Model.HumanModel.Right.ShoulderArm.Seg.Humerus.show_sCOM.r =

{0.02399838, 0.353925, 0.1982561};

Now IÂ´m confused. Where is r for the humerus segment defined? Which

coordinate system is sCoM defined relative to? What does the AnyVec3

Offset mean? ( I uploaded the model named Armmodell04) Does this

Offset influence the coordinates of sCoM? WhatÂ´s his job? How do I

have to calculate if I want to know the absolute coordinates of the

CoM? I hope you can solve my confusion.

Thank you very much and with best regards, Maren