Feature: ID:002 - Posable Bodies - Base

Description

This feature describes the minimal requirements necessary to have assets in space that can be posed. This is the basis for animations that have the ability to animate via USD time samples.

Property	Value
Proprietary Techs	None
Dependency	None

Neutral Format

Version 0.1.0

Details

Property	Value
Internal ID	FET002_BASE_NEUTRAL

Used in Profiles

This version is not currently used in any profiles.

Requirements

• Capability Hierarchy

  • Requirements

    • Exclusive-Xform-Parent-For-UsdGeom

      • HI.002 | Version 0.1.0

      • Description

        • Requirement that a UsdGeomPrim always has a parent xform.

        • Xform parent has at least one xformop:translate and one xformop: orient. (xformop:scale is optional)

        • Xform parent only has 1 UsdGeomPrim as it’s child.

        • If referencePrim has authored reference, then we need to check the heiarchy of the reference to make sure the heiarchy still complies with above requirement.

      • Rule | Implementation

    • Hierarchy-Has-Root

      • HI.004 | Version 0.1.0

      • Description

        • We don’t want scattered referencePrims (xforms)…requirement is to ensure that the reference prim (xforms) all route to a single root or ancestor referencePrim (xform).

      • Rule | Implementation

• Capability: Visualization/Geometry

  • Requirements

    • At-Least-One-Imageable-Geometry

    • VG.001 | Version 0.1.0

    • Rule | Implementation

Test Process

• Obtain Isaac Sim

  • 4.5 is public and can be downloaded here

  • 5.0 requires users to build on their systems, you can follow the docs here

• Find directory where Isaac Sim was installed

  • Launch isaacsim.bat

  • In Isaac Sim, open path to Sample Object (or your target)

  • Click on xform’s above each mesh.

    • Rotate the parent

    • Result: the whole object should move

    • 

  • Click in child xform (underneath parent)

    • Rotate the child xform

    • Result: the child’s mesh should move *

• Expected Result:

  • Every mesh is affected by at least one Xform

  • If nested hierarchy, the grandparent Xform will move entire group

  • Video Examples:

    • Posing an asset link

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