Just stumbled into a bit more of Rise of the Triad trivia, this time offering a little insight into a cut feature. To set the stage, I imagine many of you are familiar with the Lightning Guard, if not by his name then likely by him being the "No, don't shoot!" guy who sometimes pleads for mercy. His other notable characteristic is his ability to steal your missile weapon if you get to close to him. When he does, he says "Gimme that!" and plays a unique two frame animation. However, there are some peculiarities about this animation sequence when you view the raw frames.
Rather unnecessarily, this animation has full 8-sided rotations even though you're pretty much always only ever going to see the Lightning Guard from the front perspective when he steals your weapon. Perhaps the explanation behind this can be derived from the sprite names: LIH
USE. Clearly these sprites weren't originally intended for weapon stealing at all. They were meant for a generic "Use" state.
I thought I'd seen this pose in this context before, and lo and behold, reviewing Joe's actor capture session videos shows that the Low Guard, Death Monk, and Deathfire Monk also had these poses recorded:
https://youtu.be/zUbuFR6tVrc?t=9m28s - Low Guard
https://youtu.be/QPyeeSKlnWY?t=1m47s - Death Monk
https://youtu.be/QPyeeSKlnWY?t=7m58s - Deathfire Monk
And while we don't have any visual confirmation for the rest, checking the source code, we can see a whole commented out section for most of the enemies' Use states.
/*
{&s_lowgrduse1,&s_highgrduse1,&s_opuse1,&s_strikeuse1,
&s_blitzuse,&s_enforceruse1,NULL,NULL,
NULL,&s_darianuse1,NULL,NULL,
NULL,NULL,NULL,NULL},*/
{0},
Curiously, though, the Use states for the Death Monk and Deathfire Monk are null'd out here, making me think the Use state was either cut early before being implemented for those two, or the monk types were not meant to have a Use state at all, despite having already recorded said frames.
The big question still on my mind: What exactly was this Use state intended for? The only object interaction I can recall enemies performing is opening doors. Even if doors were the sole intended use case, there's still the question of why the monks lack the Use state. Maybe they just interacted through intangible sorcery powers?
Technically, we do have one other example of the Use sprites being used in-game: "General" Darian pressing the spear stabbing buttons in his cage employs his DAR
USE frames, the only other character to have such frames in the released game files. However, as you can see from the commented out code section above, this isn't necessarily reflective of the generic Use state all enemies were meant to have.
As a side note, we do have evidence that the missing Use frames were fully digitized for all of the actors. In
the ROTT manual, we can see the Death Monk using his Use frames in the bottom-left flip book on pages 24 and 26.