[Gate-users] Why can't I set the parameters of the world in Gate by myself?

[Philipp Matthies]

Hello,

you have to bear in mind that GATE volume coordinates always refer to
the center of the volumes. A world of the size 1000mm means that if
you move your daughter volume to 500mm, the CENTER of that daughter
volume will the right at the border of the world, extending BEYOND the
worlds borders!

More information can be found in the Users Guide, especially in the
Geometry section:
http://wiki.opengatecollaboration.org/index.php/Users_Guide_V7.2:Defining_a_geometry

Best regards,
Philipp

---

Philipp Matthies
Lead Engineer Nuclear Imaging

SurgicEye GmbH
Friedenstr. 18a
D-81671 München
Germany

philipp.matthies at surgiceye.com
www.surgiceye.com

2017-03-31 7:22 GMT+02:00  <zhaocyjackie at sina.com>:
>  Hi, I am a newcomer of Gate. I found a weird phenomenon that I can't set
> the parameters of world including side lengths and material of the world by
> myself. For example, I adjust the world XYZ length to 1000mm, and set the
> translation of a daughter of the world is (500,0,0)mm. When I run the
> simulation, it will be terminated and there will be a notification that the
> size of daughter is beyond the dimension of mother. More over, once I set
> these parameter, the window of OGLSX will become grey.
> I will appreciate if anyone can help me, thanks a lot!
>
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