objects whose constituent particles remain in fixed orientations relative to each other, as well as systems whose constituent parts may move relative to one another.
a body that rotates with no deformation, so that all parts remain at constant distances from every other part
Option for dynamic objects in Blender which causes the game engine to take the shape of the body into account. This can be used to create rolling spheres for example.
In dynamics, a polygonal or NURBS surface converted to an unyielding shape. Rigid bodies collide rather than pass through each other during animation. An active rigid body reacts to dynamics fields, collisions, and springs, but not to keys. A passive rigid body can have active rigid bodies collide with it, but is not affected by dynamics. Contrast with soft body. In other software packages, known as collision obstacle, dynamic obstacle.
In physics, a rigid body is an idealization of a solid body of finite size in which deformation is neglected. In other words, the distance between any two given points of a rigid body remains constant in time regardless of external forces exerted on it. In classical mechanics a rigid body is usually considered as a continuous mass distribution, while in quantum mechanics a rigid body is usually thought of as a collection of point masses.