Motion and behaviour modelling: state of art and new trends

The main task of a computer animator is to make the objects of a purely syn thetic 3D world move realistically. The great number of computer animation techniques that already exist and the new ones that are continuously appear ing, are the result of a multidisciplinary exchange of ideas. Our main goal has been to provide a classification of computer animation systems focused on motion and behaviour modelling from the point of view of control techni ques. We also present the historical evolution in these areas, providing an extensive bibliography and highlighting some historical milestones. Finall y, a set of Internet adresses of the most relevant research groups in this area present on the Web is also given.