Previous Practice No.9
1 .- Find out about the usual methods
animation Keyframes (Tables Key):
refers to pictures or drawings which defines an essential part of start and end between transition points. These are called "frames" because their long life are part of a film. A sequence of keyframes defines the movement that the viewer can see, sometimes the position of the keyframes in a film, video or animation defines the time of the movement. For the duration of only 2 or 3 keyframes in a second does not produce an illusion of movement, the permanence of the frames are set with more pictures or images, called "inbetweens."
Forward Kinematics (Kinematics):
is a method of 3D computer graphics for animation of models. The essential concept of this concept is that the position of particular parts of a model in a specific time are calculated from the position of the object orientation d, along with information on the union of a joint model.
Inverse Kinematics (Kinematics Reverse):
is a process used in the animation of 3D computer graphics, which requires calculating the articulation of a series of tips or Conjuntura, as at the end of the limb up in a particular location.
Motion Capture (motion capture):
is a digital recording technique of movements for entertainment or entertainment, sports and medical applications. It uses multiple capture systems from the optical, mechanical, magnetic systems, either through the use of sensors or other devices. Movements not only records the appearance, this method has emerged as military research.
2 .- Discuss the advantages and disadvantages of each method and at least two examples of situations that everyone is best applied.
Keyframes (Tables Key):
Advantages: Easy to handle
Useful for quick videos.
only takes basic shapes.
Disadvantages: Inefficient
for good animation.
For a big job you need several basic shapes.
Applications:
Films Commercial Videos
Presentations
Forward Kinematics (Kinematics):
Advantages:
certain behaviors.
certain positions.
every move is planned.
Disadvantages:
not define physical laws like gravity and collisions.
Applications: Robotics
Computer Games Animation.
Inverse Kinematics (Inverse Kinematics):
Advantages:
Responsible for joint requirements.
Disadvantages: Limits
anthropomorphic joint limits
Applications: Robotics
Computer Animation.
Motion Capture (motion capture):
Advantages: Faster
sometimes gives better results in real time.
The workload does not vary with the complexity or size quality or the same degree when using traditional techniques.
complex movement and realistic physical interactions such as a secondary animation, weight and exchange of forces can be more easily created with a precise check.
technology gives an actor play multiple roles in one film.
Disadvantages:
need specific hardware and special programs required to obtain and process data.
The cost of software and equipment, required personnel may not be feasible for small productions.
capture system should have specific requirements to be operated on them.
When problems occur they can be easily Retracing the scene is better than trying to manipulate the data. Only few systems accommodate real-time view of data to decide whether to take action on the matter or have to redo. Expanded
motion to quadruple characters can be difficult.
technology can become obsolete in a few years as well as software and development techniques.
The results are limited to the existence of a high quality capture depending on the volume and extra edition of the data.
movement can not follow the laws of physics generally can not be represented.
traditional animation techniques such as stress or the anticipation and monitoring movements side or manipulation, are narrow in the animation and generally do not apply.
If the computer model has different proportions from the capture of the object, this can occur.
real quality of life can not move the computer model as expected.
Applications:
In games where motion capture, for example: football, basketball and martial arts fighting, action sports in general.
To capture CG effects, in some cases replace cell animation and fully computer spawns as Golum, The Mummy and King Kong
Virtual Reality for real-time interaction. Just as visualization. Character Generation
real time.
3 .- Find out what method of animation using models of Quake and Unreal Tournament. Search using OpenGL code that helps illustrate a model of these games and run it.
Quake models used to predict movement therefore use the method of Forward Kinematics.
Unreal Tournament models have bases
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