#2193 JSBSim, replay: spawning with CG at set coordinates instead of VRP

If you respawn either after closing replay, the aircraft is moved a bit. It always happens, but is much more pronounced if JSBSim <location name="CG"> is non-zero.

Reload Scenery function does not seem to expecience this problem.

Do not know if YASim is affected.

[Anonymous]

Reproduction

Add this to Models/Tu-144D of https://gitlab.com/mdanil/Tu-144D
(the values from Tu-144D-jsbsim/metrics.xml and Tu-144D-jsbsim/mass.xml, and VRP cursor should always be at 0 (or the main <offsets> of the model.xml), and all other points must have it subtracted from them):

 <model>
  <name>VRP</name>
  <path>Aircraft/ufo/Models/cursor.ac</path>
  <offsets>
   <x-m>0.0</x-m>
   <y-m>0.0</y-m>
   <z-m>0.0</z-m>
  </offsets>
 </model>

 <model>
  <name>CG</name>
  <path>Aircraft/ufo/Models/cursor.ac</path>
  <offsets>
   <x-m>2.610</x-m>
   <y-m>0.0</y-m>
   <z-m>0.0</z-m>
  </offsets>
 </model>

 <model>
  <name>AERORP</name>
  <path>Aircraft/ufo/Models/cursor.ac</path>
  <offsets>
   <x-m>2.378</x-m>
   <y-m>0.0</y-m>
   <z-m>-0.58</z-m>
  </offsets>
 </model>

 <model>
  <name>EYEPOINT</name>
  <path>Aircraft/ufo/Models/cursor.ac</path>
  <offsets>
   <x-m>-27.7515</x-m>
   <y-m>-0.5</y-m>
   <z-m>1.16375</z-m>
  </offsets>
 </model>

 <animation>
  <type>material</type>
  <object-name>VRP</object-name>
  <emission>
   <red>1.0</red>
   <green>0.0</green>
   <blue>0.0</blue>
  </emission>
 </animation>
 <animation>
  <type>material</type>
  <object-name>CG</object-name>
  <emission>
   <red>0.0</red>
   <green>1.0</green>
   <blue>0.0</blue>
  </emission>
 </animation>
 <animation>
  <type>material</type>
  <object-name>AERORP</object-name>
  <emission>
   <red>0.0</red>
   <green>0.0</green>
   <blue>1.0</blue>
  </emission>
 </animation>
 <animation>
  <type>material</type>
  <object-name>EYEPOINT</object-name>
  <emission>
   <red>1.0</red>
   <green>1.0</green>
   <blue>0.0</blue>
  </emission>
 </animation>

Run FG with some coordinats, for example aparking in EDDH: --lat=53.62807947785572 --lon=9.993584269256779 --heading=241.5559801997424

Run this in Nasal console:

geo.put_model("Aircraft/ufo/Models/cursor.ac", 53.62807947785572, 9.993584269256779, geo.elevation(53.62807947785572, 9.993584269256779));

Expected: cursor spawns under the model's VRP
Have: cursor spawns under empty CG

[Anonymous]

And I have made a model.xml that can be included in any JSBSim aircraft to visualize the points: