AnimParamSource
A fact the engine already has, written into this parameter every tick before the animator samples.
Five report what the character controller MEASURED: speed is its planar speed in m/s; strafeX and strafeY are its velocity in its own frame, -1..1 of its authored speed, x to the right and y forward; verticalSpeed is the y component of its velocity; grounded is 1 on the floor and 0 in the air. Three report what it was ASKED for, before the solver ran and before root motion wrote anything: inputSpeed in m/s, inputStrafeX and inputStrafeY as the same -1..1 fractions. A state carrying rootMotion must take its parameter from the input group or from a behaviour, because root motion sets the measured velocity the other group reports (animator-root-motion-source). An entity with no controller leaves the parameter at its value, and a script's ctx.animator.param on a bound parameter is overwritten on the next tick.
Type: "speed" | "strafeX" | "strafeY" | "verticalSpeed" | "grounded" | "inputSpeed" | "inputStrafeX" | "inputStrafeY"
Values
speedstrafeXstrafeYverticalSpeedgroundedinputSpeedinputStrafeXinputStrafeY