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LudwigFriedmann / OpenMATERIAL

3D model exchange format with physical material properties for virtual development, test and validation of automated driving.
Mozilla Public License 2.0
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Origin of the pedestrian structure not well defined #50

Closed ClemensLinnhoff closed 8 months ago

ClemensLinnhoff commented 9 months ago

In the definition of the pedestrian structure, it says:

The position of the transform of the hip bone, which represents the root of the hierarchical bone structure, coincides with the reference coordinate frame (see below).

So the position of the hip is the origin of the reference coordinate frame.

However, it also says:

Origin (ORef): Geometric center of the bounding box of the undeflected model

Which would mean, that the hip is in the center of the bounding box of the undeflected model. This does not make sense to me. E.g. for a person with (relatively) short legs and a (relatively) long upper body, the hip would be below the center of the bounding box.

Could you clarify this @LudwigFriedmann ?

LudwigFriedmann commented 8 months ago

Hi @ClemensLinnhoff , you're absolutely right. Within the course of the discussion with the OSI group we decided to place the reference system in the middle of the bounding box (consistent with OSI).

I would therefore suggest deleting the sentence:

The position of the transform of the hip bone, which represents the root of the hierarchical bone structure, coincides with the reference coordinate frame (see below).

LudwigFriedmann commented 8 months ago

Transferred to https://github.com/asam-ev/OpenMATERIAL/issues/1