[x3d-public] Artwork HAnim Specification v2.1 Working Draft (WD) editors meeting, 16 June

[Don Brutzman]

Thanks Joe for stitching those images together, following our constructive
meeting yesterday.  Available for review:

   - HAnim v2.1 Draft, clause 4 Concepts, 4.2.2 Humanoid coordinate system
   -
   https://www.web3d.org/specifications/X3Dv4Draft/ISO-IEC19774/ISO-IEC19774-1/ISO-IEC19774-1v2.1/ISO-IEC19774-1v2.1-WD/Architecture/concepts.html#HumanoidCoordinateSystem


4.2.2 Humanoid coordinate system

HAnim humanoids are defined using a right-handed coordinate system. From
the perspective of the humanoid model: +X axis direction is defined as the
left side of the humanoid, +Y axis direction is defined as up towards the
top of the model, and +Z axis is defined as the direction towards the front
of the model. This relationship is shown in Figure 4.0
<https://www.web3d.org/specifications/X3Dv4Draft/ISO-IEC19774/ISO-IEC19774-1/ISO-IEC19774-1v2.1/ISO-IEC19774-1v2.1-WD/Architecture/concepts.html#f-HumanoidCoordinateSystem>
.

[image: Humanoid coordinate system]

Figure 4.0 — Humanoid coordinate system (TODO renumber all figures)

Umm, next worthy TODO challenge: build an X3D model for this figure that we
can add to the X3D Examples Archives!  😀

v/r Don

On Mon, Jun 23, 2025 at 9:58 PM Joe D Williams via x3d-public <
x3d-public at web3d.org> wrote:

> Hi Don, here is a very simple (and unskilled) place holder image showing
> Humanoid Coordinate System Axes.
>
> Thanks,
>
> Joe
>
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