The value is proportional to the object's velocity in X direction. The velocities from 0 to max_dir are mapped linearily to the interval from begin to end.
Syntax
array Anim_XDir(int begin, int end, int max_dir);
Parameters
begin:
Start of the interval.
end:
End of the interval. If end is greater than begin then the value increases with increases XDir, otherwise it decreases.
max_dir:
Largest value of XDir to be mapped. Even larger velocities lead to the same animation value (end).