Defines how the upper leg's roll/twisting is distributed between the thigh and knee joints.
upperLegTwist
is a weighting value in the range 0..1 that determines the fraction of the twist applied at the thigh and knee. For example, a value of zero means the twist should be handled entirely at the thigh, while a value of one means it should be applied entirely at the knee. The default value of 0.5 distributes the twisting evenly between thigh and knee.See Also: lowerArmTwist, lowerLegTwist, upperArmTwist.