Movement Key Effect on Air Acceleration

In vanilla Quake 3 you can accelerate basically just as well with a single input key (i.e. only A or only D) than with the usual combination of two keys (W+A or W+D). But in the Jedi Academy singleplayer, strafing with only a single key is significantly slower while in the air. On the other hand, acceleration in Quake 3 is significantly slower when holding the jump key while in the air, whereas it has no influence whatsoever in Jedi Academy.

Jedi Academy inherits this behavior directly from its engine antecessor Star Trek: Voyager - Elite Force. So the technical explanation in its Elite-Reinforce source port (kugelrund/Elite-Reinforce/docs/movekey_air_accel_effect.md) applies to Jedi Academy too, with the relevant code snippets looking very much the same.

Just like in Elite Force, the line wishspeed *= scale is missing in PM_AirMove (jediacademy/code/game/bg_pmove.cpp#L2942), with the variable scale still being set (jediacademy/code/game/bg_pmove.cpp#L2870) but remaining unused. Other functions like PM_WalkMove do apply the scaling (jediacademy/code/game/bg_pmove.cpp#L3202). The added deceleration scaling is also identical (jediacademy/code/game/bg_pmove.cpp#L2945).