estimate
public static void estimate(Vector3d feet, float bodyYaw, boolean sneaking, boolean leftArm, double scale, HandTipEstimator.ItemTransform transform, Vector3d itemPoint, Vector3d position, Quaterniond rotation)
Parameters
feet
player position
bodyYaw
body yaw in Minecraft degrees
leftArm
true when the item is drawn in the left arm
scale
the player's scale attribute
transform
the item's third-person display transform for that arm, or null
itemPoint
point in item model pixels (0 to 16 spans the model)