Editing Appendix/Ramblings/RiemannB74C692 (section)

==Coding Steps==
Here we begin with a working model of [[Appendix/Ramblings/RiemannMeetsOculus#S-Type_Ellipsoid_b41c385|b41c385]] and use incremental changes in the COLLADA-based code to construct a working model of b74c692.

<ul>
<li>Pulling from the earlier modeling subsection titled, [[Appendix/Ramblings/RiemannMeetsOculus#Final_Touches|Final Touches]] &hellip;
<ul>
<li>
<font color="darkgreen"><b>Final17.dae</b></font> &nbsp; <font color="red">TERRIFIC &nbsp;!</font>: 
<br />Both hands of the clock now continue to cycle smoothly (through 9.126 "hours" = 9<sup>h</sup> 8<sup>m</sup>) while the laboratory frame completes 5.0 full spin periods &#8212; which will be 5.0 full spins of the ellipsoid as viewed from the inertial frame.  <font color="red">This works in both visualization venues</font>.   
</li>
<li>
<font color="darkgreen"><b>Inertial17.dae</b></font>:  
<br />This is identical to "Final17.dae" except that the system is viewed from the inertial frame of reference.  <font color="red">This works in both visualization venues</font>.   
</li>
<li>
<font color="lightgreen">[KEEP]</font> <font color="darkgreen"><b>Inertial21.dae</b></font>:  
<br />Here, we set the "nudging" angle of the MidPlane to 0&deg;, but moved the "nudging" angle of the ellipsoid from 0&deg; to just 1&deg;.  This appears to <font color="red">work in both visualization venues</font>.   
</li>
</ul>
</li>

<li>Pulling from a different earlier subsection titled, [[Appendix/Ramblings/RiemannMeetsOculus#Multiple_Lagrangian_Fluid_Elements|Multiple Lagrangian Fluid Elements]] &hellip;
<ul>
<li>
<font color="darkgreen"><b>MultiLagrange23.dae</b></font> --> TestMulti23.dae: 
<br />This model shows the motion of nine (small, red cube) Lagrange particles whose motion is confined to the equatorial plane of the Riemann ellipsoid. This nicely illustrates that the volume occupied by a region of fluid remains unchanged as the fluid moves around the ellipsoid.  &nbsp; <font color="red">This works in both visualization venues!</font>
</li>
<li>
<font color="lightgreen">[KEEP]</font> <font color="darkgreen"><b>MultiLagrange26.dae</b></font>:  
<br />Here, we set the "nudging" angle of the MidPlane to 1&deg;, and moved the "nudging" angle of the ellipsoid from 5&deg; to 0&deg;.  Also, we bumped the purple's opacity up from 0.6 to 0.8.  This appears to <font color="red">work in both visualization venues</font>.   
</li>
</ul>
</li>
<li><font color="darkgreen"><b>TestMulti52.dae</b></font>
<br />Same as <b>MultiLagrange23.dae</b> --> TestMulti23.dae, except the starting ellipsoid angle is nudged by 45&deg; instead of 5&deg;.
</li>
</li>
<li><font color="lightgreen">[KEEP]</font> <font color="darkgreen"><b>TestMulti56.dae</b></font>:
<br />Same as <b>MultiLagrange26.dae</b>, except we have attempted to replace the alpha-numeric labeling.  <font color="red">SUCCESS!  Works in all three visualization venues:  Mac "Preview", PC "3D Viewer", and Oculus RIft S</font>.
</li>
<li><font color="purple"><b>Facebook glTF Transmutator (v1.5)</b></font>
<br />I am only now appreciating that, when a ".glb"-formatted file is imported into the Oculus Rift S inventory, the importation step is handled by Facebook's glTF Transmutator (v1.5).
</li>
<li><font color="darkgreen"><b>TestMulti70b.dae</b></font>
<br />Same as <b>TestMulti56.dae</b>, except we have inserted the correct EllipsoidOctant geometries (drawn from b74c692 Old_DRot.dae).  <font color="red">This works in both visualization venues</font>.
</li>
<li><font color="darkgreen"><b>TestMulti71.dae</b></font>
<br />Incorporated proper tracking of nine Lagrangian fluid elements, drawn from b74c692 Old_DI.dae, but reexplained in the subsection below titled, [[#location_X|location_X]].  <font color="red">This works in both visualization venues</font>.
</li>
<li><font color="darkgreen"><b>TestMulti72.dae</b></font>
<br />Incorporated (small yellow) markers that identify the orbit of a Lagrangian fluid element that lies in the equatorial plane and at the surface of the ellipsoid.  The x and y coordinate values are tabulated in the subsection below titled, [[#location_X|location_X]].  <font color="red">This works in both visualization venues</font>.  The fluid elements should be able to complete more than one orbit during the time that the ellipsoid spins 5 times; only one fluid orbit is included in this particular model.
</li>
<li><font color="darkgreen"><b>TestMulti73.dae</b></font>
<br />Successfully registered the movement of the hands on the wall-clock.  <font color="red">This works in both visualization venues</font>.  Now, decide whether or not to extend the orbital motion of the nine Lagrangian fluid elements beyond one orbit.
</li>
</ul>

This evening (1 June 2020) for the first time, I placed a couple of these animated models "outside" &#8212; that is, beyond the unwindowed balcony &#8212; of my Oculus Home environment.  It was really neat seeing them hoover in the sunlight well above the steeply sloping, rocky hillside.  Definitely worth the price of admission!  This is fun!

<ul>
<li><font color="darkgreen"><b>TestMulti74.dae</b></font>
<br />Finished product!  Successfully extended the motion of the nine Lagrangian fluid elements up to the time (about 1.7 orbits) when the ellipsoid has finished its fifth spin.  <font color="red">This works in both visualization venues</font>. 
</li>
</ul>

===Best b74c692 Models===

The example models created for display in the Oculus Rift S are the following:
<ol>
  <li>Inertial Frame:  <font color="lightgreen">[KEEP]</font> InertialB74C692aa.dae [02 May 2020]</li>
  <li>Rotating Frame:  <font color="lightgreen">[KEEP]</font> TestMulti74.dae [02 June 2020]</li>
</ol>