Rotações

Rotações are a fundamental concept in geometry and linear algebra, representing a transformation that turns an object around a fixed point or axis. In two-dimensional space, a rotation is defined by an angle and a center of rotation. When an object is rotated, its shape and size remain unchanged, but its orientation in space is altered. This transformation can be visualized as spinning the object around the designated center.

In three-dimensional space, rotations become more complex. They can be defined by an axis of rotation and an angle. Any orientation in 3D space can be achieved through a combination of rotations around the three principal axes (x, y, and z). This property makes rotations crucial in fields like computer graphics, robotics, and physics, where describing and manipulating objects in 3D is essential.

Mathematically, rotations can be represented using matrices. A rotation matrix, when multiplied by a vector representing a point, will produce a new vector representing the rotated point. The specific form of the rotation matrix depends on the dimension of the space and the angle of rotation. In physics and engineering, rotations are often described using quaternions, which offer certain advantages in terms of computational efficiency and avoiding issues like gimbal lock. The concept of rotation is widely applied in understanding the motion of celestial bodies, the mechanics of machinery, and the behavior of subatomic particles.