* Fixes Debris not inheriting parent ship texture replacements
Debris chunks that use the same texture as the actual hull model are not updated when `texture-replace` methods are used. For example, a clean grey base textures that has texture replace via table or FRED is changed to red/brown. But when the ship is destroyed the debris objects are using the original lighter texture instead of the newer darker one.
#6154 provided the groundwork to fix this, but one step fell through the cracks; setting the debris hull textures to what the parent ship used.
This PR sets the debris texture replacements when debris is created to fix this (and fixes#2462).
Fix is tested and works as expected.
* cleanup setting shared
* get pmi correctly
* Move replacement textures from ship to modelinstance
* Actually set pmi
* Fix texture replace in fred as well
* Fix bad indent
* incorporate feedback
* Add global to local for matrices
* Add lua integration
* Get Submodel from Submodel instance
* Add submodel functions
* Add model instance from submodel instance
* Fix index
* Fix copy paste error
The two `VIRTVAR`s for Orientation in subsystems and submodel instances do the same thing, but did not have the same code - in particular, the subsystem version did not update the subsystem angle and turret angle. This syncs them up.
Allow scripts to reference submodels, submodel instances, and model instances. Currently just a few properties (like Orientation and Radius) can be accessed, but this can be easily expanded in the future.
Also add relevant functions to calculate real-world positions and orientations of rotated submodels.
wookieejedi