The ability to lock characters elbow in certain situations is extremely necessary in animation. Since a working mechanism to stretch the arm has been developed in previous section,by measuring the distance between the shoulder and wrist joints of the arm, and when the joint chain reaches to its maximum length then start scaling the joints. Using the same methodology for elbow locking but instead this time the joints stick or stretch towards the elbow controller. the simple implementation logic is to measure the distance between the joints and the elbow, and then tell the joints to scale according to that new distance value as shown in