In Blender 3D, Constraints are rules or restrictions you can apply to objects, bones, or cameras that control how they behave, move, or rotate—often automatically—based on another object, bone, or some condition. <br /><br />Think of constraints as instructions that tell Blender: “Do this automatically whenever X happens.” <br /><br />🔹 Key Points About Constraints <br /><br />Control Without Manual Keyframes <br /><br />You can make objects follow, track, or copy other objects automatically. <br /><br />Reduces manual animation work. <br /><br />Applied to: <br /><br />Objects (like meshes, empties, cameras) <br /><br />Bones (in rigs) <br /><br />Cameras and lights <br /><br />Not Deforming: <br /><br />Constraints don’t change the mesh shape directly (use modifiers or rigging for that). <br /><br />They only control movement, rotation, scaling, or visibility. <br /><br />🔹 Common Types of Constraints <br /><br />Copy Location / Rotation / Scale <br /><br />Makes one object copy another’s position, rotation, or size. <br /><br />Track To / Locked Track <br /><br />Makes an object or bone always point at another object. <br /><br />Often used for cameras or eyes. <br /><br />Limit Location / Rotation / Scale <br /><br />Restricts movement, rotation, or size within certain ranges. <br /><br />Child Of <br /><br />Makes an object behave like a child of another object temporarily or partially. <br /><br />IK (Inverse Kinematics) <br /><br />Used in rigging: automatically calculates bone rotations to reach a target. <br /><br />Follow Path <br /><br />Makes an object follow a curve or path. <br /><br />Great for cars, cameras, or flying objects
