<Kernel.Scalar name="SetPosition">
  <Parameter.EntityInstance name="particle" type="Particle" write="position"/>
  <Parameter.Scalar name="position" type="Vec3" mode="READ"/>
</Kernel.Scalar>

<Kernel.Scalar name="SetPosition">
  <Parameter.EntityPtr name="particle" type="Particle" write="position"/>
  <Parameter.Scalar name="position" type="Vec3" mode="READ"/>
</Kernel.Scalar>

