stateLayerOpacity function
State-layer opacity: the pressed layer replaces hover (M3 state
layers). The pressed tint is snapped on in frame 1 by KeyPressMotion,
which is the M3E frame-1 cue.
Implementation
double stateLayerOpacity(KeyFaceMotion motion, KeyFaceSpec spec) => math
.max(
spec.hoverOverlayOpacity * motion.hover.value,
spec.pressedOverlayOpacity * motion.tint.value,
)
.clamp(0.0, 1.0);