differnce between inverse and forward kinematics in maya?

Inverse and Forward Kinematics are two different ways of animating objects in Maya, a 3D computer graphics software.

1. Forward Kinematics (FK): In Forward Kinematics, you animate by manually setting the rotation of each joint in the chain, starting from the root and working your way down to the child. This is a more traditional way of animating and gives you a lot of control, but it can be more time-consuming. For example, if you're animating a character's arm, you would first rotate the shoulder, then the elbow, and finally the wrist.

2. Inverse Kinematics (IK): Inverse Kinematics works in the opposite way. Instead of rotating each joint individually, you set a goal for the end effector (like a hand or foot), and the software calculates the rotations of the joints in the chain to reach that goal. This is useful for animating characters that are interacting with the environment, like a character placing their hand on a table. You just move the hand to the table, and the software figures out how the arm should move.

In Maya, you can switch between FK and IK on a joint chain using the IK Handle tool and the Rotate tool.